Controller

(FPGA)

+

-

+

-

Ch. 1

UV1

OV6

OV5

OV4

OV3

OV2

V+ = 3.3V

OV1

+IN1

-IN1

GND

AO

CO1

*

*

COPOL

UV6

UV5

UV4

UV3

UV2

UV1

* Open

Drain

AOSEL

*

OV1

RESERVED

Ch. 6

+IN6

-IN6

CO6

REF

REF

LMV7231

COPOL

REF

UV6 OV6

REF

SW

L1

C2

R2

R3

BST

VCC

C4

C5

D1

RON/SD

VIN

R1

Input = 9V - 42V

C1

1.0 PF

115k

3k

3k

100 PH

0.1PF

22 PF

0.01 PF

VOUT = 5V

C3

0.1 PF

C6

C7

R6

0.01 PF

121k

2200

pF

LM25007

RTN

R7

R8

R9

1.15k

10

95.3

R10

10k

R12

10k

ON/OFF

C8

0.1 PF

C9

*optional

RCL

R5

200k

FB

R11

10k

V+

V+

V+

LMV7231

www.ti.com

SNOSB45E – FEBRUARY 2010 – REVISED MARCH 2013

LMV7231 Hex Window Comparator with 1.5% Precision and 400mV Reference

Check for Samples: LMV7231

1

FEATURES

DESCRIPTION

The LMV7231 is a 1.5% accurate Hex Window

2

•

Comparator which can be used to monitor power

Noted)

supply voltages. The device uses an internal 400mV

•

High Accuracy Voltage Reference: 400 mV

reference

for

the

comparator

trip

value.

The

•

Threshold Accuracy: ±1.5% (max)

comparator set points can be set via external resistor

dividers. The LMV7231 has 6 outputs (CO1-CO6)

•

Wide Supply Voltage Range +2.2V to +5.5V

that signal an under-voltage or over-voltage event for

•

Input/Output Voltage Range Above V+

each power supply input. An output (AO) is also

•

Internal Hysteresis: 6mV

provided to signal when any of the power supply

inputs have an over-voltage or under-voltage event.

•

Propagation Delay: 2.6 µs to 5.6 µs

This ability to signal an under-voltage or over-voltage

•

Supply Current 7.7 µA Per Channel

event for the individual power supply inputs, in

•

24 Lead WQFN Package

addition to an output to signal such an event on any

of the power supply inputs adds unparalleled system

•

Temperature Range: -40°C to 125°C

protection capability.

APPLICATIONS

The LMV7231’s +2.2V to +5.5V power supply voltage

range, low supply current, and input/output voltage

•

Power Supply Voltage Detection

range above V+ make it ideal for a wide range of

•

Battery Monitoring

power supply monitoring applications. Operation is

•

Handheld Instruments

ensured over the -40°C to +125°C temperature

range. The device is available in a 24-pin WQFN

•

Relay Driving

package.

•

Industrial Control Systems

Typical Application Circuit

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2010–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.