1

LTC2903-1

29031f a

■

Cell Phone Base Stations

Precision Quad Supply

Monitor in 6-Lead SOT-23

, LTC and LT are registered trademarks of Linear Technology Corporation.

3.3V, 2.5V, 1.8V, ADJ (LTC2903-A1)

5V, 3.3V, 2.5V, 1.8V (LTC2903-B1)

5V, 3.3V, 1.8V, –5.2V (LTC2903-C1)

3.3V, ADJ, ADJ, ADJ (LTC2903-D1)

5V, ADJ, ADJ, ADJ (LTC2903-E1)

Monitored Voltage over Temperature

Monitoring

The LTC

common reset output remains low until all four inputs

have been in compliance for 200ms. Voltage thresholds

maintain ±1.5% accuracy over temperature (with respect

to the monitored voltage). The LTC2903-1 features an

open-drain RST output with a weak internal pullup.

LTC2903-E1. The RST output is guaranteed to sink at least

conduct current down to 0V. Quiescent current is 20µA

typical, making the LTC2903-1 ideal for power conscious

systems. The LTC2903-1 is available in a 6-lead low profile

(1mm) SOT-23 package.

ThinSOT is a trademark of Linear Technology Corporation.

0

0.06

0.08

0.10

0.8

2903 TA01b

0.04

0.02

0.05

0.07

0.09

0.03

0.01

0

0.2

0.1

1µA

0.4

0.3

0.6 0.7

0.9

0.5

1

2µA

5µA

20µA

LTC2903-B1

10µA

Low Voltage Reset Pull-Down Performance

vs External Pull-Up Current and Input Supply Voltage

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

V1

GND

V2

RST

V4

V3

LTC2903-B1

C1

0.1µF

1.8V

C2

0.1µF

2903 TA01

2.5V

3.3V

5V

DC/DC

CONVERTER

SYSTEM

LOGIC