LTC2932

1

2932fb

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Configurable Six Supply

Monitor with Adjustable Reset

Timer and Supply Tolerance

tems with up to six supply voltages. One of 16 preset or

adjustable voltage monitor combinations can be selected

using an external resistive divider connected to the mode

select pin. The preset voltage thresholds are digitally

configurable to 5%, 7.5%, 10%, or 12.5% below the

nominal operating voltage. The LTC2932 also features

adjustable inputs with a 0.5V nominal threshold. All six

open-drain voltage comparator outputs are connected to

separate pins for individual supply monitoring.

The reset timeout period is adjustable using an external

capacitor. The RST output is guaranteed to be in the

during supply margin testing. Each status output has a

weak internal pull-up and may be externally pulled up to

an external voltage.

The 52μA supply current makes the LTC2932 ideal for

power conscious systems and the part may be configured

to monitor less than six inputs.

Six Supply Monitor 12V (ADJ),

5V, 3.3V, 2.5V, 1.8V, 1.2V (ADJ)

■

Simultaneously Monitors Six Supplies

■

16 User Selectable Combinations of

5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and

± Adjustable Voltage Thresholds

■

Guaranteed Threshold Accuracy: ±1.5%

■

Selectable Supply Tolerances: 5%, 7.5%, 10%,

12.5% Below Monitored Voltage

■

Reset Disable Pin for Margining Applications

■

Low Supply Current: 52μA

■

Power Supply Glitch Immunity

■

■

High Temperature Operation to 125°C

■

20-Lead TSSOP Package

■

Desktop and Notebook Computers

■

Multivoltage Systems

■

Telecom Equipment

■

Portable Battery-Powered Equipment

■

Network Servers

■

Automotive

LTC2932

1.2V

1.8V

2.5V

3.3V

5V

12V

2932 TA01

47nF

RST

RDIS

VPG

GND

T0

T1

CRT

V1

V2

V3

V4

V5

V6

VREF

SYSTEM

LOGIC

POWER

GOOD

R1

59k

1%

100k

1%

100k

1%

124k

1%

2150k

1%

R2

40.2k

1%

0.1μF

0.1μF

10k

Voltage Threshold Configuration Table

V1 (V)

V2 (V)

V3 (V)

V4 (V)

V5 (V)

V6 (V)

5

3.3

2.5

1.8

ADJ

ADJ

5

3.3

2.5

1.5

ADJ

ADJ

5

3.3

2.5

ADJ

ADJ

ADJ

5

3.3

1.8

ADJ

ADJ

ADJ

5

3.3

1.8

–ADJ

ADJ

ADJ

5

3.3

ADJ

ADJ

ADJ

ADJ

5

3.3

ADJ

–ADJ

ADJ

ADJ

5

3

2.5

ADJ

ADJ

ADJ

5

3

1.8

ADJ

ADJ

ADJ

5

3

ADJ

ADJ

ADJ

ADJ

3.3

2.5

1.8

1.5

ADJ

ADJ

3.3

2.5

1.8

ADJ

ADJ

ADJ

3.3

2.5

1.8

–ADJ

ADJ

ADJ

3.3

2.5

1.5

ADJ

ADJ

ADJ

3.3

2.5

ADJ

ADJ

ADJ

ADJ

3.3

2.5

ADJ

–ADJ

ADJ

ADJ

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

All other trademarks are the property of their respective owners.

Protected by U.S. Patents including 6967591, 7119714, 7239251.