LMS33460
LMS33460 3V Under Voltage Detector
Literature Number: SNVS158C
LMS33460
February 11, 2011
3V Under Voltage Detector
General Description
The LMS33460 is an under voltage detector with a 3.0V
threshold and extremely low power consumption. The
LMS33460 is specifically designed to accurately monitor pow-
er supplies. It is especially suited to battery powered systems
where low quiescent current and small size are required. This
IC generates an active output whenever the input voltage
drops below 3.0 Volts.
This part uses a precision on-chip voltage reference and a
comparator to measure the input voltage. Built in hysteresis
helps to prevent erratic operation in the presence of noise.
The UVD is available in the ultra-miniature SC70-5 package.
Features
■Ultra low Power
■3.0V detection
■VIN Range: 0.8V to 7.0V
■Open drain output
■Ultra-small SC70-5 package
■Extended Temperature range (−40°C to 85°C)
■Ultra Low Quiescent current (1µA typ)
Applications
■Low battery voltage detector
■Power Fail Indicator
■Processor Reset Generator
■Battery Backup Control
■Battery Operated Equipment
■Hand-held Instruments
Typical Application
20020003
© 2011 National Semiconductor Corporation 200200 www.national.com
LMS33460 3V Under Voltage Detector
Connection Diagram
SC70-5
20020002
Top View
Ordering Information
Package Part Number Package Marking Transport Media NSC
Drawing
5-Pin SC70-5 LMS33460MG C33 1k Units Tape and Reel MAA05A
LMS33460MGX 3k Units Tape and Reel
For LMS33460 Ordering and Availability Information see: http://www.national.com/mpf/LM/LMS33460.html#Order
Block Diagram
20020001
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LMS33460
Absolute Maximum Ratings (Note 1)
Input Voltage to GND 8.0V
Output Voltage to GND 8.0V
Output Continuous Output Current 30mA
Vapor Phase IR Convection Reflow 240°C
ESD Rating (Note 4)
Human Body Model 2500V
Machine Model 200V
TJMAX (Note 3)150°C
θJA (Note 3)478°C/W
Temperature Range
Operating Junction −40°C to +85°C
Storage Temperature Range −65°C to +150°C
Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25°C. Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min Typ Max Units
VDET Detector Threshold VIN Falling 2.85 3.0 3.15 V
VHYS Detector Voltage Hysteresis VIN Rising 0.095 0.155 0.215 V
IIN Input Supply Current
VIN = 2.87V –1.0 2.2 µA
VIN = 4.7V –1.2 3.6 µA
VIN = 7.0V (Note 3)–25 200 µA
VIN(MAX) Maximum Operating Voltage – – 7.0 V
VIN(MIN)
Minimum Operating Voltage
(Note 2) –0.7
1.0
1.1
1.3 V
IOUT(LOW) Output Current Low VOUT = 0.05V, VIN = 1.1V
VOUT = 0.50V, VIN = 1.5V
0.01
2
0.6
11 –mA
tPDHL
Output Delay Time
Output Transition
High to Low
CL = 10pF, RL = 470kΩ
–130 200 µsec
ΔVDET/ΔTDetect Voltage Temperature
Coefficient –±120 –PPM/°C
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
beyond its rated operating conditions.
Note 2: Temperature range specifications is guaranteed by design.
Note 3: Quiescent current will increase substantially above 5.5 volts, but is very low in the normal range below 5.5 volts.
Note 4: Human Body Model (HBM): 1.5kΩ in series with 100pF; Machine Model (MM): 0Ω in series with 200pF.
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LMS33460
Typical Characteristics (TA = 25°C, RL = 470 kΩ and CL = 10 pF unless otherwise noted).
Detector Threshold vs. Temperature
20020005
Supply Current vs. Input Voltage
20020004
Propagation Delay Time (tPDHL) vs. Temperature
20020006
Propagation Delay Time (tPDLH) vs. Temperature
20020007
VOUT(LOW) vs. VIN
20020010
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LMS33460
Application Circuit Information
The LMS33460 is a micro power under voltage sensing circuit
with an open drain output configuration, which requires a pull
resistor.
The LMS33460 features a voltage reference, a comparator
with precise thresholds and built in hysteresis to prevent er-
ratic reset operation.
20020008
FIGURE 1. Propagation Delay Timing Diagram
20020009
FIGURE 2. Propagation Delay Test Circuit
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LMS33460
Physical Dimensions inches (millimeters) unless otherwise noted
5-Pin SC70-5
NSC Package Number MAA05A
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LMS33460
Notes
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LMS33460
Notes
LMS33460 3V Under Voltage Detector
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