AIC1521
Single High-Side Power Switch With Control
Function
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
www.analog.com.tw
DS-1520-00 Aug 18, 00TEL: 886-3-5772500 FAX: 886-3-5772510 1
n FEATURES
•120mΩ (5V Input) High-Side MOSFET Switch.
l 500mA Continuous Load Current.
l 80µA Typical On-State Supply Current.
l 1µA Typical Off-State Supply Current.
l Current-Limit / Short Circuit Protection.
l Thermal Limiting Protection under Overcurrent
Condition.
l Undervoltage Lockout Ensures that Switch is off at
Start Up.
l Output can be Forced Higher than Input (Off-State).
l Slow Turn ON and Fast Turn OFF.
l Active-High or Active-Low Enable.
n APPLICATIONS
l Motherboard USB Management.
l USB Power Management.
l Hot Plug-In Power Supplies.
l Battery-Charger Circuit.
l Power Distribution Switch.
n TYPICAL APPLICATION
CIRCUIT
n DESCRIPTION
The AIC1521 is an integrated high-side power
switch for self-powered and bus-powered Universal
Serial Bus (USB) applications. The high-side
switch is a MOSFET with 120mΩ RDS(ON), which
meets USB voltage drop requirements for
maximum transmission wire length. The switch
ON/OFF is controlled by CTL pin.
Output current is typically limited to 1.0A, well
below the 5A safety requirement, and thermal
shutdown function shuts the switch off to prevent
damage under overcurrent conditions.
Guaranteed minimum output rise time limits
inrush current during hot plug-in, minimizing EMI
and preventing the voltage at upstream port from
dropping excessively.
33
µ
F
5.0V
VCC OUTIN
GND
*
33µFD+
D-
GND
VBUS
0.01
µ
F
*
33µF, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high-current traces
0.1µF
Ferrite Bead
+
DATA
AA
I
I
CC
11
55
22
11
--
0
0
+
CTL
USB High-Side Power Switch
AIC1521
2
n ORDERING INFORMATION
ORDER NUMBER PIN CONFIGURATION
AIC
1521
-
X
C
X
PACKAGING TYPE
O: MSOP
S: SO8
W: SOT-89-5
CONTROL POLARITY
0: Active Low
1: Active High
AIC1521-0CW
AIC1521-1CW
(SOT-89-5)
FRONT VIEW
1: IN
2: GND
3: OUT
4: NC
5: CTL
1 2 3
5 4
AIC1521-0CO
AIC1521-1CO
(MSOP8)
NC
NC
OUT
GND
IN
CTL
NC
NC
1
3
4
28
6
5
7
FRONT VIEW
AIC1521-0CS
AIC1521-1CS
(SO8)
NC
NC
OUT
GND
IN
CTL
NC
NC 1
3
4
2
8
6
5
7
FRONT VIEW
n ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VIN).......................................................………….......……........... 7.0V
Operating Temperature Range ......………..............…………….…............... -40°C ~ 85°C
Storage Temperature Range ....................................……….................. -65°C ~ 150°C
n ELECTRICAL CHARACTERISTICS (VIN= 5V, Ta=25°C, unless otherwise
specified.)
PARAMETERS CONDITIONS MIN. TYP. MAX. UNIT
Supply Current Switch Off, OUT=Open
Switch On, OUT=Open 0.75
80 2
100 µA
Control Input Voltage VCTL =Logic “0”
VCTL =Logic “1”
2.4
0.8 V
Control Input Current VCTL =Logic “0”
VCTL =Logic “1” 0.01
0.01 1
1 µA
Output MOSFET Resistance IOUT = 500mA 120 180 mΩ
Output Turn-On Rise Delay RL = 10Ω 30 µS
Output Turn-On Rise Time RL = 10Ω 500 µS
Output Turn-Off Delay RL = 10Ω 0.2 10 µS
AIC1521
3
n ELECTRICAL CHARACTERISTICS (Continued)
PARAMETERS
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Output Turn-Off Fall Time RL = 10Ω 0.2 10 µS
Output Leakage Current 2 µA
Current Limit Threshold 0.6 1.0 1.25 A
Thermal Limit 110 °C
UVLO Threshold VIN Increasing
VIN Decreasing 2.8
2.6 V
n BLOCK DIAGRAM
GATE
NMOS
RS
Limit
Current
UVLO
Gate Control
Charge
Pump
Thermal
Protection
OSC.
GND OUT
IN
CTL
n TYPICAL PERFORMANCE CHARACTERISTICS
3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
60
65
70
75
80
85
90
On-State Supply Current vs. Supply Voltage
Supply Current (µA)
Supply Voltage (V)
-
40 -20 020 40 60 80 100
65
70
75
80
85
On-State Supply Current vs. Temperature
Supply Current (µA)
Temperature (
°
C)
AIC1521
4
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
8.0
8.5
9.5
10.0
10.5
11.0
11.5
12.0
Off-State Supply Current vs. Supply Voltage
Supply Current (nA)
Supply Voltage (V)
9.0
-40
-20
0
20
40
60
80
100
0
2
4
6
8
10
12
14
16
18
20
Off-State Supply Current vs. Temperature
Supply Current (
nA)
Temperature (°C)
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
100
105
110
115
120
125
130
Output On Resistance vs. Supply Voltage
Switch
On Ristance (mΩ)
Supply Voltage (V)
Switch On Resistance (mΩ)
Temperature (
°
C)
-40
-20
0
20
40
60
80
100
80
90
100
110
120
130
140
150
Output On Resistance vs. Temperature
UVLO Threshold Voltage (V)
Temperature (°C)
-40
-20
0
20
40
60
80
100
2.4
2.5
2.6
2.7
2.8
2.9
3.0
Falling
Rising
UVLO Threshold Voltage vs. Temperature
Temperature (°C)
-40
-20
0
20
40
60
80
100
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
Current Limit Threshold vs. Temperature
Current Limit (A)
AIC1521
5
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Output Rise Time (
µ
S)
Temperature (°C)
Output Rise Time vs. temperature
-40
-20
0
20
40
60
80
100
350
400
450
500
550
Temperature (°C)
Output Fall Time vs. Temperature
Output Fall Time (nS)
-40
-20
0
20
40
60
80
100
50
100
150
200
250
300
Supply Voltage (V)
CTL Threshold Voltage vs. Supply Voltage
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
1.0
1.2
1.4
1.6
1.8
2.0
2.2
CTL Rising
CTL Falling
Turn On Characteristic (35Ω, Loading)
100µF
No Cap
IOUT, 200mA/DIV
220µF
CTL
Turn On Rising Time (10Ω loading)
CTL
IOUT
VOUT
200mA/DIV
426µS
Turn Off Falling Time (10Ω Loading)
CTL
IOUT
VOUT
107nS
200mA/DIV
AIC1521
6
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Turn On Characteristic (35Ω, 100µF Loading)
CTL
IOUT
VOUT
500mA/DIV
Turn Off Falling Time (35Ω, 100uF Loading)
CTL
IOUT
VOUT
500mA/DIV
Current Limit Threshold
IOUT 500mA/DIV
VOUT
1A
1.2A
Thermal Limiting Transient Response
Thermal limit (2Ω) loading)
IOUT 500mA/DIV
VOUT
Short Circuit Testing
Thermal Oscillation
IOUT 500mA/DIV
VOUT
Short Circuit Response Time
IOUT 1A/DIV
Short
VOUT
AIC1521
7
n PIN DESCRIPTION
MSOP8, SO8
PIN 1/4/6/8: NC:
PIN 2: CTL -TTL compatible control input. It
controls the power switch turn-
on/turn-off. Active High for
AIC1521-1 and active low for
AIC1521-0.
PIN 3: IN- Power supply input.
PIN 4: GND- Chip power ground.
PN 7: OUT- MOSFET switch output.
SOT89-5
PIN 1:IN -Power supply input.
PIN 2:GND -Chip power ground.
PIN 3:OUT - MOSFET switch output.
PIN 4: NC
PIN 5: CTL -TTL compatible control input. It
controls the power switch turn-
on/turn-off. Active High for
AIC1521-1 and active low for
AIC1521-0.
n APPLICATION INFORMATIONS
l Current Limit
l The current limit threshold is preset internally. It
protects the output MOSFET switches from
damage due to undesirable short circuit
conditions or excess inrush current often
encountered during hot plug-in. The AIC1521
allows minimum 500mA continuous load current
per Channel.
l Thermal Protection
When the chip temperature exceeds 110°C, the
thermal protection function works.
l Supply Filtering
A 0.1uF to 1uF bypass capacitor from IN to GND,
located near the device, is strongly recommended
to control supply transients. Without a bypass
capacitor, an output short may cause sufficient
ringing on the input (from supply lead inductance) to
damage internal control circuitry.
l Transient Droop Requirements
USB support dynamic attachment (hot plug-in) of
peripherals. A current surge is caused by the input
capacitance of downstream device. Ferrite beads
are recommended in series with all power and
ground connector pins. Ferrite beads reduce EMI
and limit the inrush current during hot-attachment
by filtering high-frequency signals.
l Short Circuit Transient
Bulk capacitance provides the short-term transient
current needed during a hot-attachment event. With
a 33uF, 16V tantalum or 100uF, 10V electrolytic
capacitor mounted close to downstream connector
should provide transient drop protection.
l Printed Circuit Layout
The power circuitry of USB printed circuit boards
requires a customized layout to maximize thermal
dissipation and to minimize voltage drop and EMI.
AIC1521
8
■ PHYSICAL DIMENSIONS
l MSOP 8 (unit: mm)
SYMBOL MIN MAX
A0.76 0.97
A1 -- 0.20
B0.28 0.38
C0.13 0.23
D2.90 3.10
E2.90 3.10
e0.65
H4.80 5.00
L0.40 0.66
D
H
e
A
B
A1
C
E
L
l 8 LEAD PLASTIC SO (unit: mm)
SYMBOL MIN MAX
A1.35 1.75
A1 0.10 0.25
B0.33 0.51
C0.19 0.25
D4.80 5.00
E3.80 4.00
e1.27(TYP)
H5.80 6.20
L0.40 1.27
D
H
e
A
B
A1
C
E
L
AIC1521
9
l SOT-89-5 (unit: mm)
SYMBOL MIN MAX
A1.40 1.60
b0.32 0.52
b1 1.40 1.80
C0.30 0.50
D4.40 4.60
E2.40 2.60
e300 (TYP)
e1 1.50 (TYP)
HE 4.20 5.00
b
e1
LE
HE
e
E
A
C
D
b1
b
LE 0.80 ---
l SOT-89-5 MARKING
Part No. Marking
AIC1521-0CW BH01
AIC1521-1CW BH02
