LTC2921CGN View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC2921CGN

Power Supply Tracker with Input Monitors

Linear Technology 

1 2 3 4 5 6 7 8 9 10 Next

W

FUNCTIONAL DIAGRA

LTC2921/LTC2922 Series

SENSE

VCC

50mV

+–

OVERCURRENT

–

LATCH

+

UNDERVOLTAGE

PG

ENABLE

VPUMP

4µA

PG

V1

V2

V3

V4

0.7V

0.5V

– OVERVOLTAGE

+

+ MONITOR

–

– OVERVOLTAGE

+

+ MONITOR

–

– OVERVOLTAGE

+

+ MONITOR

–

– OVERVOLTAGE

+

+ MONITOR

–

– OVERVOLTAGE

+

+ MONITOR

–

VPUMP ≈ 11.1V

+

–

AT VCC =5V

APPROXIMATELY 1V

VSWON

1.2V

0.7V

0.5V

REFERENCE

GENERATOR

AND

CHARGE

PUMP

(LTC2922 ONLY)

D0

D1

REMOTE

SENSE

SWITCH

ENABLE

VPUMP

REMOTE

SENSE

SWITCH

GATE

CONTROL

LOGIC

VPUMP

10µA

GATE

ENABLE

+

GATE

ON

VCC

2µA

TIMER

ENABLE

VCC

CIRCUIT

BREAKER

RESET PULSE

TIMER ENABLE

VSWON

+

TIMER

DONE

PULSE

TIMER

+ DONE

GATE

TIMER

1.2V

+

SWITCHES ON

(LTC2922 ONLY)

D2

D3

D4

VSWON

2921/22 F01

GND

S0

S1

S2

S3

S4

(LTC2922 ONLY)

(LTC2922 ONLY)

Figure 1. LTC2921 and LTC2922 Functional Diagram

29212fa

7

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