LTC2926

1

2926fa

15.0k

9.53k

0.1

µF

2926 TA01

LTC2926

RAMP

FB2

OUT

SENSE

RAMPBUF

TRACK1

TRACK2

PGTMR

GND

D1

15.0k

4.02k

FAULT

10k

1

µF

SGATE1

10

Ω

SGATE2

10

Ω

100

Ω

STATUS

IRF7413Z

IRF7413Z

ON

10k

1.8V MODULE

1.8V

SLAVE1

OUT

SENSE

D2

100

Ω

3.3V MODULE

3.3V

SLAVE2

S2

15.0k

4.02k

STATUS/PGI

FB1

S1

15.0k

9.53k

FAULT

ON/OFF

0.1

µF

MGATE

MOSFET-Controlled

Power Supply Tracker

The LTC2926 provides a simple solution for tracking and

sequencing up to three power supply rails. An N-channel

MOSFET and a few resistors per channel configure the

load voltages to ramp up and down together, with voltage

offsets, with time delays or with different ramp rates.

Automatic remote sense switching compensates for voltage

drops across the MOSFETs. The LTC2926 provides two

integrated switches as well as a signal to control optional

additional external N-channel MOSFET sense switches.

The LTC2926 includes I/O signals for communication with

other devices. The status output asserts after tracking and

sequencing have completed. A low voltage on the power

good input after an adjustable timeout period causes load

disconnect. A low voltage on the fault I/O causes immedi-

ate load disconnect. Until it is reset, a fault latch prevents

tracking and keeps the loads disconnected.

(4mm

× 5mm) Packages

APPLICATIO S

FEATURES

TYPICAL APPLICATIO

DESCRIPTIO

, 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 6897717.

2926 TA01b

500mV/DIV

3.3V SLAVE2

1.8V SLAVE1

5ms/DIV

2926 TA01c

500mV/DIV

3.3V SLAVE2

1.8V SLAVE1

5ms/DIV