Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A Output Current
* UL is a registered trademark of Underwriters Laboratories, Inc.
† CSA is a registered trademark of Canadian Standards Association.
‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
Document No: DS05-007 ver. 1.43
PDF name: lynx_sip_x3_ds.pdf
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
Compliant to ROHS EU Directive 2002/95/EC with
lead solder exemption (non-Z versions)
Delivers up to 10A output current
High efficiency – 95% at 3.3V full load (VIN = 5.0V)
Small size and low profile:
50.8 mm x 12.7 mm x 8.10 mm
(2.00 in x 0.5 in x 0.32 in)
Low output ripple and noise
High Reliability:
Calculated MTBF = 15.7 M hours at 25oC Full-load
Constant switching frequency (300 kHz)
Output voltage programmable from 0.75 Vdc to
3.63Vdc via external resistor
Line Regulation: 0.3% (typical)
Load Regulation: 0.4% (typical)
Temperature Regulation: 0.4 % (typical)
Remote On/Off
Remote Sense
Over temperature protection
Output overcurrent protection (non-latching)
Wide operating temperature range (-40°C to 85°C)
UL* 60950-1Recognized, CSA† C22.2 No. 60950-1-
03 Certified, and VDE‡ 0805:2001-12 (EN60950-1)
Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Applications
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
Enterprise Networks
Latest generation IC’s (DSP, FPGA, ASIC)
and Microprocessor powered applications
Description
Austin LynxTM SIP power modules are non-isolated dc-dc converters that can deliver up to 10A of output current
with full load efficiency of 95% at 3.3V output. These modules provide a precisely regulated output voltage
programmable via an external resistor from 0.75Vdc to 3.63Vdc over a wide range of input voltage (VIN = 3.0 –
5.5Vdc). Their open-frame construction and small footprint enable designers to develop cost- and space-efficient
solutions.
RoHS Compliant
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 2
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect the device reliability.
Parameter Device Symbol Min Max Unit
Input Voltage All VIN -0.3 5.8 Vdc
Continuous
Operating Ambient Temperature All TA -40 85 °C
(see Thermal Considerations section)
Storage Temperature All Tstg -55 125 °C
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter Device Symbol Min Typ Max Unit
Operating Input Voltage All VIN 3.0 5.5 Vdc
Maximum Input Current All IIN,max 10 Adc
(VIN= VIN, min to VIN, max, IO=IO, max VO,set = 3.3Vdc)
Input No Load Current VO,set = 0.75Vdc IIN,No load 25 mA
(VIN = 5.0Vdc, IO = 0, module enabled) VO,set = 3.3Vdc IIN,No load 30 mA
Input Stand-by Current All IIN,stand-by 1.5 mA
(VIN = 5.0Vdc, module disabled)
Inrush Transient All I2t 0.1 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN, min to
VIN, max, IO= IOmax ; See Test configuration section)
All 100 mAp-p
Input Ripple Rejection (120Hz) All 30 dB
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to being
part of a complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to
achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a 15A,
time-delay fuse (see Safety Considerations section). Based on the information provided in this data sheet on inrush
energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse
manufacturer’s data sheet for further information.
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 3
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point All VO, set -2.0 VO, set +2.0 % VO, set
(VIN=IN, min, IO=IO, max, TA=25°C)
Output Voltage All VO, set -3.0% ⎯ +3% % VO, set
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range All VO 0.7525 3.63 Vdc
Selected by an external resistor
Output Regulation
Line (VIN=VIN, min to VIN, max) All
⎯ 0.3 ⎯ % VO, set
Load (IO=IO, min to IO, max) All
⎯ 0.4 ⎯ % VO, set
Temperature (Tref=TA, min to TA, max) All
⎯ 0.4 ⎯ % VO, set
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max
Cout = 1μF ceramic//10μFtantalum capacitors)
RMS (5Hz to 20MHz bandwidth) All ⎯ 8 15 mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 25 50 mVpk-pk
External Capacitance
ESR ≥ 1 mΩ All CO, max ⎯ ⎯ 1000 μF
ESR ≥ 10 mΩ All CO, max ⎯ ⎯ 5000 μF
Output Current All Io 0 10 Adc
Output Current Limit Inception (Hiccup Mode ) All IO, lim ⎯ 200 ⎯ % Io
(VO= 90% of VO, set)
Output Short-Circuit Current All IO, s/c ⎯ 3 ⎯ Adc
(VO≤250mV) ( Hiccup Mode )
Efficiency VO,set = 0.75Vdc η 82.5 %
VIN= VIN, nom, TA=25°C VO, set = 1.2Vdc η 88.0 %
IO=IO, max , VO= VO,set V
O,set = 1.5Vdc η 89.5 %
V
O,set = 1.8Vdc η 91.0 %
V
O,set = 2.5Vdc η 93.0 %
V
O,set = 3.3Vdc η 95.0 %
Switching Frequency All fsw ⎯ 300 ⎯ kHz
Dynamic Load Response
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 200 ⎯ mV
Load Change from Io= 50% to 100% of
Io,max; 1μF ceramic// 10 μF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts ⎯ 25 ⎯ μs
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 200 ⎯ mV
Load Change from Io= 100% to 50%of Io,max:
1μF ceramic// 10 μF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts ⎯ 25 ⎯ μs
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 4
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Dynamic Load Response
(dIo/dt=2.5A/μs; V VIN = VIN, nom; TA=25°C) All Vpk ⎯ 100 ⎯ mV
Load Change from Io= 50% to 100% of Io,max;
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts ⎯ 100 ⎯ μs
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 100 ⎯ mV
Load Change from Io= 100% to 50%of Io,max:
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts ⎯ 100 ⎯ μs
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (IO=IO, max, TA=25°C)
Telecordia SR-332 Issue 1: Method 1 Case 3 15,726,000 Hours
Weight ⎯ 5.6 (0.2) ⎯ g (oz.)
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 5
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Parameter Device Symbol Min Typ Max Unit
Remote On/Off Signal interface
(VIN=VIN, min to VIN, max; Open collector pnp or equivalent
Compatible, Von/off signal referenced to GND
See feature description section)
Logic High
Input High Voltage (Module OFF) All VIH 1.5 ― V
IN,max V
Input High Current All IIH ― 0.2 1 mA
Logic Low
Input Low Voltage (Module ON) All VIL -0.2 ― 0.3 V
Input Low Current All IIL ― ― 10
μA
Turn-On Delay and Rise Times
(IO=IO, max , VIN=VIN, nom, TA = 25 oC)
Case 1: On/Off input is set to Logic Low (Module
ON) and then input power is applied (delay from
instant at which VIN = VIN, min until Vo=10% of Vo,set)
All Tdelay ― 3.9 ― msec
Case 2: Input power is applied for at least one second
and then the On/Off input is set to logic Low (delay from
instant at which Von/Off=0.3V until Vo=10% of Vo, set)
All Tdelay ― 3.9 ― msec
Output voltage Rise time (time for Vo to rise from 10%
of Vo,set to 90% of Vo, set)
All Trise ― 4.2 8.5 msec
Output voltage overshoot – Startup ― 1 % VO, set
IO= IO, max; VIN = 3.0 to 5.5Vdc, TA = 25 oC
Remote Sense Range ― ― 0.5 V
Overtemperature Protection All Tref ⎯ 125 ⎯ °C
(See Thermal Consideration section)
Input Undervoltage Lockout
Turn-on Threshold All 2.2 V
Turn-off Threshold All 2.0 V
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 6
Characteristic Curves
The following figures provide typical characteristics for the Austin LynxTM SIP modules at 25ºC.
EFFICIENCY, (η)
72
75
78
81
84
87
90
02.557.510
VIN = 5.5V
VIN = 5.0V
VIN = 3.0V
EFFICIENCY, (η)
72
75
78
81
84
87
90
93
96
02.557.510
VIN = 5.5V
VIN = 5.0V
VIN = 3.0V
OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)
Figure 1. Converter Efficiency versus Output Current
(Vout = 0.75Vdc).
Figure 4. Converter Efficiency versus Output Current
(Vout = 1.8Vdc).
EFFICIENCY, (η)
72
75
78
81
84
87
90
93
0 2.5 5 7.5 10
VIN = 5.5V
VIN = 5.0V
VIN = 3.0V
EFFICIENCY, (η)
73
76
79
82
85
88
91
94
97
10 0
0 2.5 5 7.5 10
VIN = 5.5V
VIN = 5.0V
VIN = 3.0V
OUTPUT CURRENT
,
I
O
(
A
)
OUTPUT CURRENT
,
I
O
(
A
)
Figure 2. Converter Efficiency versus Output Current
(Vout = 1.2Vdc).
Figure 5. Converter Efficiency versus Output Current
(Vout = 2.5Vdc).
EFFICIENCY, (η)
70
73
76
79
82
85
88
91
94
02.557.510
VIN = 5.5V
VIN = 5.0V
VIN = 3.0V
EFFICIENCY, (η)
OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)
Figure 3. Converter Efficiency versus Output Current
(Vout = 1.5Vdc).
Figure 6. Converter Efficiency versus Output Current
(Vout = 3.3Vdc).
76
79
82
85
88
91
94
97
10 0
0 2.557.510
VIN = 5.5V
VIN = 5.0V
VIN = 4.5V
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 7
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin LynxTM SIP modules at 25ºC.
INPUT CURRENT, IIN (A)
0
1
2
3
4
5
6
7
8
9
10
0.5 1.5 2.5 3.5 4.5 5.5
Io=5A
Io=0A
Io=10A
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (5A/div) VO (V) (200mV/div)
INPUT VOLTAGE, VIN (V) TIME, t (10μs/div)
Figure 7. Input voltage vs. Input Current (Vo =
2.5Vdc).
Figure 10. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3Vdc).
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAG
IO (A) (5A/div) VO (V) (200mV/div)
TIME, t (2μs/div) TIME, t (10μs/div)
Figure 8. Typical Output Ripple and Noise (Vin = 5.0V
dc, Vo = 0.75Vdc, Io=10A).
Figure 11. Transient Response to Dynamic Load
Change from 100% to 50% of full load (Vo = 3.3 Vdc).
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (5A/div) VO (V) (200mV/div)
TIME, t (2μs/div) TIME, t (20μs/div)
Figure 9. Typical Output Ripple and Noise (Vin = 5.0V
dc, Vo = 3.3 Vdc, Io=10A).
Figure 12. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3 Vdc,
Cext = 2x150 μF Polymer Capacitors).
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 8
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin LynxTM SMT modules at 25ºC.
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (5A/div) VO (V) (200mV/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VOV) (1V/div) VNN (V) (2V/div)
TIME, t (20μs/div) TIME, t (2 ms/div)
Figure 13. Transient Response to Dynamic Load
Change from 100% of 50% full load (Vo = 3.3 Vdc, Cext
= 2x150
μ
F Pol
y
mer Ca
p
acitors
)
.
Figure 16. Typical Start-Up with application of Vin
(Vin = 5.5Vdc, Vo = 3.3Vdc, Io = 10A).
OUTPUT VOLTAGE On/Off VOLTAGE
VOV) (1V/div) VOn/off (V) (2V/div)
OUTPUT VOLTAGE On/Off VOLTAGE
VOV) (1V/div) VOn/off (V) (2V/div)
TIME, t (2 ms/div) TIME, t (2 ms/div)
Figure 14. Typical Start-Up Using Remote On/Off (Vin
= 5.0Vdc, Vo = 3.3Vdc, Io = 10.0A).
Figure 17 Typical Start-Up Using Remote On/Off with
Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1.0A, Vbias
=1.0Vdc).
OUTPUT VOLTAGE On/Off VOLTAGE
VOV) (1V/div) VOn/off (V) (2V/div)
OUTPUT CURRENT,
IO (A) (10A/div)
TIME, t (2 ms/div) TIME, t (10ms/div)
Figure 15. Typical Start-Up Using Remote On/Off with
Low-ESR external capacitors (Vin = 5.5Vdc, Vo =
3.3Vdc, Io = 10.0A, Co = 1050μF).
Figure 18. Output short circuit Current (Vin =
5.0Vdc, Vo = 0.75Vdc).
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 9
Characteristic Curves (continued)
The following figures provide thermal derating curves for the Austin LynxTM SIP modules.
OUTPUT CURRENT, Io (A)
0
2
4
6
8
10
12
20 30 40 50 60 70 80 90
NC
100 LFM
OUTPUT CURRENT, Io (A)
0
2
4
6
8
10
12
20 30 40 50 60 70 80 90
NC
100 LFM
AMBIENT TEMPERATURE
,
T
A
O
C AMBIENT TEMPERATURE
,
T
A
O
C
Figure 19. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0Vdc,
Vo=0.75Vdc).
Figure 22. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0Vdc,
Vo=3.3 Vdc).
OUTPUT CURRENT, Io (A)
0
2
4
6
8
10
12
20 30 40 50 60 70 80 90
NC
100 LFM
OUTPUT CURRENT, Io (A)
0
2
4
6
8
10
12
20 30 40 50 60 70 80 90
N
C
AMBIENT TEMPERATURE, T
A
O
C AMBIENT TEMPERATURE, T
A
O
C
Figure 20. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0Vdc,
Vo=1.8 Vdc).
Figure 23. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 3.3Vdc,
Vo=2.5 Vdc).
OUTPUT CURRENT, Io (A)
0
2
4
6
8
10
12
20 30 40 50 60 70 80 90
NC
100 LFM
AMBIENT TEMPERATURE, TA
O
C
Figure 21. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0Vdc,
Vo=2.5 Vdc).
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 10
Test Configurations
TO OSCILLOSCOPE CURRENT PROBE
LTEST
1μH
BATTERY
CS 1000μF
Electrolytic
E.S.R.<0.1Ω
@ 20°C 100kHz
2x100μF
Tantalum
VIN(+)
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 1μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
CIN
Figure 24. Input Reflected Ripple Current Test
Setup.
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
V
O
(+)
COM
1uF .
RESISTIVE
LOAD
SCOPE
COPPER STRIP
GROUND PLANE
10uF
Figure 25. Output Ripple and Noise Test Setup.
VO
COM
VIN(+)
COM
RLOAD
Rcontact Rdistribution
Rcontact Rdistribution
Rcontact
Rcontact
Rdistribution
Rdistribution
VIN VO
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 26. Output Voltage and Efficiency Test Setup.
η =
VO. IO
VIN. IIN
x 100 %
Efficiency
Design Considerations
Input Filtering
Austin LynxTM SIP module should be connected to a
low-impedance source. A highly inductive source can
affect the stability of the module. An input capacitance
must be placed directly adjacent to the input pin of the
module, to minimize input ripple voltage and ensure
module stability.
To minimize input voltage ripple, low-ESR polymer and
ceramic capacitors are recommended at the input of the
module. Figure 27 shows input ripple voltage (mVp-p)
for various outputs with 1x150 µF polymer capacitors
(Panasonic p/n: EEFUE0J151R, Sanyo p/n:
6TPE150M) in parallel with 1 x 47 µF ceramic capacitor
(Panasonic p/n: ECJ-5YB0J476M, Taiyo- Yuden p/n:
CEJMK432BJ476MMT) at full load. Figure 28 shows
the input ripple with 3x150 µF polymer capacitors in
parallel with 2 x 47 µF ceramic capacitor at full load.
Input Ripple Voltage (mVp-p)
0
20
40
60
80
100
120
140
160
180
0.511.522.533.5
3.3Vin
5Vin
Output Voltage (Vdc)
Figure 27. Input ripple voltage for various output
with 1x150 µF polymer and 1x47 µF ceramic
capacitors at the input (full load).
Input Ripple Voltage (mVp-p)
0
20
40
60
80
100
120
0.51 1.522.533.5
3.3Vin
5Vin
Output Voltage (Vdc)
Figure 28. Input ripple voltage for various output
with 3x150 µF polymer and 2x47 µF ceramic
capacitors at the input (full load)
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 11
Design Considerations (continued)
Output Filtering
The Austin LynxTM SIP module is designed for low
output ripple voltage and will meet the maximum output
ripple specification with 1 µF ceramic and 10 µF
tantalum capacitors at the output of the module.
However, additional output filtering may be required by
the system designer for a number of reasons. First,
there may be a need to further reduce the output ripple
and noise of the module. Second, the dynamic
response characteristics may need to be customized to
a particular load step change.
To reduce the output ripple and improve the dynamic
response to a step load change, additional capacitance
at the output can be used. Low ESR polymer and
ceramic capacitors are recommended to improve the
dynamic response of the module. For stable operation
of the module, limit the capacitance to less than the
maximum output capacitance as specified in the
electrical specification table.
Safety Considerations
For safety agency approval the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standards,
i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE
0850:2001-12 (EN60950-1) Licensed.
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the
input must meet SELV requirements. The power
module has extra-low voltage (ELV) outputs when all
inputs are ELV.
The input to these units is to be provided with a fast-
acting fuse with a maximum rating of 15A in the positive
input lead.
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 12
Feature Description
Remote On/Off
The Austin LynxTM power modules feature an an On/Off
pin for remote On/Off operation. The On/Off pin is pulled
high with an external pull-up resistor (typical Rpull-up =
68k, ± 5%) as shown in Fig. 28. When transistor Q1 is
in the Off state, logic High is applied to the On/Off pin
and the power module is Off. The minimum On/off
voltage for logic High on the On/Off pin is 1.5Vdc. To
turn the module ON, logic Low is applied to the On/Off
pin by turning ON Q1. When not using the negative
logic On/Off, leave the pin unconnected or tie to GND.
Q1
R1
R2
Q2 CSS
GND
PWM Enable
ON/OFF
VIN+
ON/OFF
_
+
V
I
MODULE
pull-up
R
ON/OFF
Figure 29. Circuit configuration for using negative
logic On/OFF.
Overcurrent Protection
To provide protection in a fault (output overload)
condition, the unit is equipped with internal
current-limiting circuitry and can endure current limiting
continuously. At the point of current-limit inception, the
unit enters hiccup mode. The unit operates normally
once the output current is brought back into its specified
range. The typical average output current during hiccup
is 3A.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout
limit, module operation is disabled. The module will
begin to operate at an input voltage above the
undervoltage lockout turn-on threshold.
Overtemperature Protection
To provide protection in a fault condition, the unit is
equipped with a thermal shutdown circuit. The unit will
shutdown if the thermal reference point Tref, exceeds
125oC (typical), but the thermal shutdown is not
intended as a guarantee that the unit will survive
temperatures beyond its rating. The module will
automatically restarts after it cools down.
Output Voltage Programming
The output voltage of the Austin LynxTM SIP can be
programmed to any voltage from 0.75 Vdc to 3.3 Vdc by
connecting a single resistor (shown as Rtrim in Figure
31) between the TRIM and GND pins of the module.
Without an external resistor between the TRIM pin and
the ground, the output voltage of the module is 0.7525
Vdc. To calculate the value of the resistor Rtrim for a
particular output voltage Vo, use the following equation:
Ω
−
−
=5110
7525.0
21070
Vo
Rtrim
For example, to program the output voltage of the
Austin LynxTM module to 1.8 Vdc, Rtrim is calculated is
follows:
Ω−
−
=
5110
7525.08.1
21070
Rtrim
Ω= kRtrim 004.15
VO(+)
TRIM
GND
R
trim
LOAD
VIN(+)
ON/OFF
Figure 31. Circuit configuration for programming
output voltage using an external resistor.
Table 1 provides Rtrim values for some common output
voltages
Table 1
VO, set (V) Rtrim (KΩ)
0.7525 Open
1.2 41.973
1.5 23.077
1.8 15.004
2.5 6.947
3.3 3.160
By using a 1% tolerance trim resistor, set point
tolerance of ±2% is achieved as specified in the
electrical specifications. The POL Programming Tool,
available at www.lineagepower.com under the Design
Tools section, helps determine the required external
trim resistor needed for a specific output voltage
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 13
Feature Descriptions (continued)
The amount of power delivered by the module is defined
as the voltage at the output terminals multiplied by the
output current. When using the trim feature, the output
voltage of the module can be increased, which at the
same output current would increase the power output of
the module. Care should be taken to ensure that the
maximum output power of the module remains at or
below the maximum rated power (Pmax = Vo,set x Io,max).
Voltage Margining
Output voltage margining can be implemented in the
Austin LynxTM modules by connecting a resistor, Rmargin-
up, from the Trim pin to the ground pin for margining-up
the output voltage and by connecting a resistor, Rmargin-
down, from the Trim pin to the Output pin for margining-
down. Figure 32 shows the circuit configuration for
output voltage margining. The POL Programming Tool,
available at www.lineagepower.com under the Design
Tools section, also calculates the values of Rmargin-up and
Rmargin-down for a specific output voltage and % margin.
Please consult your local Lineage Power technical
representative for additional details.
Vo
Austin Lynx or
Lynx II Series
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
Figure 32. Circuit Configuration for margining
Output voltage.
Remote Sense
The Austin LynxTM SIP power modules have a Remote
Sense feature to minimize the effects of distribution
losses by regulating the voltage at the Remote Sense
pin (See Figure 33). The voltage between the Sense
pin and Vo pin must not exceed 0.5V.
The amount of power delivered by the module is defined
as the output voltage multiplied by the output current
(Vo x Io). When using Remote Sense, the output
voltage of the module can increase, which if the same
output is maintained, increases the power output by the
module. Make sure that the maximum output power of
the module remains at or below the maximum rated
power. When the Remote Sense feature is not being
used, leave the Remote Sense pin unconnected.
VO
COM
VIN(+)
COM
RLOAD
Rcontact Rdistribution
Rcontact Rdistribution
Rcontact
Rcontact
Rdistribution
Rdistribution
Sense
Figure 33. Remote sense circuit configuration
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 14
Thermal Considerations
The power modules operate in a variety of thermal
environments; however, sufficient cooling should always
be provided to help ensure reliable operation.
Considerations include ambient temperature, airflow,
module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of
the module will result in an increase in reliability. The
thermal data presented here is based on physical
measurements taken in a wind tunnel. The test set-up
is shown in Figure 34. Note that the airflow is parallel to
the long axis of the module as shown in Figure 35. The
derating data applies to airflow in either direction of the
module’s long axis.
Figure 35. Thermal Test Set-up.
The thermal reference point, Tref used in the
specifications is shown in Figure 34. For reliable
operation this temperature should not exceed 125 oC.
The output power of the module should not exceed the
rated power of the module (Vo,set x Io,max).
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board-
Mounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.
Heat Transfer via Convection
Increased airflow over the module enhances the heat
transfer via convection. Thermal derating curves
showing the maximum output current that can be
delivered at different local ambient temperature (TA) for
airflow conditions ranging from natural convection and
up to 2m/s (400 ft./min) are shown in the Characteristics
Curves section.
Air Flow Tref
Top View
Figure 35. Tref Temperature measurement location
Post solder Cleaning and Drying
Considerations
Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The
result of inadequate cleaning and drying can affect both
the reliability of a power module and the testability of the
finished circuit-board assembly. For guidance on
appropriate soldering, cleaning and drying procedures,
refer to Board Mounted Power Modules: Soldering and
Cleaning Application Note
Through-Hole Lead-Free Soldering
Information
The RoHS-compliant through-hole products use the
SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant
components. They are designed to be processed
through single or dual wave soldering machines. The
pins have an RoHS-compliant finish that is compatible
with both Pb and Pb-free wave soldering processes. A
maximum preheat rate of 3°C/s is suggested. The wave
preheat process should be such that the temperature of
the power module board is kept below 210°C. For Pb
solder, the recommended pot temperature is 260°C,
while the Pb-free solder pot is 270°C max. Not all
RoHS-compliant through-hole products can be
processed with paste-through-hole Pb or Pb-free reflow
process. If additional information is needed, please
consult with your Lineage Power technical
representative for more details.
A
ir
flow
x
Po w e r Mo d u le
W
ind Tunnel
PWBs
8.3_
(0.325)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 15
Mechanical Outline
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
Side View
Back View
PIN FUNCTION
1 Vo
2 Vo
3 Vo,sense
4 Vo
5 GND
6 GND
7 VIN
8 VIN
9 TRIM
10 ON/OFF
Back View
Side View
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 16
Recommended Pad Layout
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
Pin Function
1 Vo
2 Vo
3 Vo,sense
4 Vo
5 GND
6 GND
7 VIN
8 VIN
9 TRIM
10 ON/OFF
Data Sheet
December 1, 2010
Austin LynxTM SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
LINEAGE POWER 17
Document No: DS05-007 ver. 1.43
PDF name: lynx_sip_x3_ds.pdf
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 2. Device Codes
Device Code
Input Voltage
Range
Output
Voltage
Output
Current
Efficiency
3.3V @full load
Connector
Type Comcodes
AXH010A0X3 3.0 – 5.5Vdc 0.75 – 3.63Vdc 10 A 95.0% TH 108992046
AXH010A0X3Z 3.0 – 5.5Vdc 0.75 – 3.63Vdc 10 A 95.0% TH CC109101318
* Remote sense feature is active and pin 6 is added with code suffix “3”
-Z refers to RoHS compliant Versions
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Lineage Power Corporation
601 Shiloh Road, Plano, TX 75074, USA
+1-888-LINEAGE(546-3243)
(Outside U.S.A.: +1-972-244-WATT(9288))
www.lineagepower.com
e-mail: techsupport1@lineagepower.com
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Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or
a
pplication. No rights under any patent accompany the sale of any such product(s) or information.
Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents.
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2010 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved.
