LTC2960

1

2960fa

For more information www.linear.com/LTC2960

Typical applicaTion

FeaTures

DescripTion

36V Nano-Current

Two-Input Voltage Monitor

The LTC®2960 is a nano-current, high voltage two-input

voltage monitor, ideally suited for multicell battery ap-

plications. External resistive dividers configure custom

comparator thresholds. The supervisory circuit monitors

the ADJ input and pulls the RST output low when the input

drops below threshold. A reset timeout period delays the

return of the RST output to a high state when the input

rises above the threshold. The spare comparator allows

voltageconditionstobedetectedwitheitheranon-inverting

is provided for external activation of the reset output.

Other options provided on the LTC2960-1/LTC2960-2 in-

cludearesettimeoutperiodselectpin,RT,toselectbetween

15ms or 200ms reset timeout periods. The LTC2960-3/

LTC2960-4 have a fixed 200ms reset timeout period. The

RST and OUT outputs are available with active pull-up cir-

cuitstoanoutputlogicsupplypin(LTC2960-3/LTC2960-4)

or 36V open-drain outputs (LTC2960-1/LTC2960-2).

Battery and Regulator Monitor

Supply Current vs Supply Voltage

applicaTions

n

850nA Quiescent Current

n

n

1.5% (Max) Accuracy Over Temperature

n

Adjustable Reset Threshold

n

Wide Temperature Range (–40°C to 125°C)

n

n

Manual Reset Input

n

Compact 2mm

× 2mm 8-lead DFN and

TSOT-23 (ThinSOT™) Packages

n

Portable Equipment

n

Battery Powered Equipment

n

Security Systems

n

Automotive Systems

L

, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property

of their respective owners.

LTC2960 Option Table

Option

Inputs

Reset Timeout Period

Output Type

LTC2960-1

15ms/200ms

36V Open-Drain

LTC2960-2

15ms/200ms

36V Open-Drain

LTC2960-3

200ms

Active Pull-Up

LTC2960-4

200ms

Active Pull-Up

+

GND

RST

OUT

ADJ

MR

LTC2960-3

LTC3632

DC/DC

GND

Li-Ion

4.2V

+

Li-Ion

4.2V

C1

0.1µF

50V

C2

1µF

R2

6.04M

R1

402k

R4

1.3M

R3

402k

1.8V

RESET

LOW BATTERY

POWER-FAIL FALLING THRESHOLD = 6.410V

RESET FALLING THRESHOLD = 1.693V

2960 TA01

0

0

900

600

300

1200

40

32

8

16

2960 TA01a

24

MR=5V, 27C