12

LT1389

1389fa LT/TP 0200 2K REV A • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1998

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

PART NUMBER

DESCRIPTION

COMMENTS

LTC

Micropower Comparator with Reference

3.7

µA Max Supply Current, 1% 1.182V Reference,

MSOP, PDIP and SO-8 Packages

LT1460

Micropower Series Reference

0.075% Max, 10ppm/

°C Max Drift, 2.5V, 5V and 10V Versions,

MSOP, PDIP, SO-8, SOT-23 and TO-92 Packages

LT1461

Micropower Precision LDO Series Reference

3ppm/

°C Max Drift, 0°C to 70°C, –40°C to 85°C, –40°C to 125°C

Options in SO-8

LT1495

1.5

µA Precision Rail-to-Rail Dual Op Amp

1.5

LTC1540

Nanopower Comparator with Reference

600nA Max Supply Current, 2% 1.182V Reference,

MSOP and SO-8 Packages

LT1634

Micropower Precision Shunt Voltage Reference

0.05% Max, 10ppm/

°C Max Drift, 1.25V, 2.5V, 4.096V, 5V,

10

µA Maximum Supply Current

LTC1798

6

µA Low Dropout Series Reference

Available in Adjustable, 2.5V, 3V, 4.096V and 5V

RELATED PARTS

10M

5%

1M

5%

620k

5%

R3

1.75M

0.1%

T0 LOAD

SW

OFF

R4

1.25M

0.1%

D1

A

BATTERY

10M

5%

R1

500k

0.1%

R2

1.25M

0.1%

LT1389-1.25

D2

1.75V

1.25V

1389 TA05

A2

1/4 LT1496

A4

1/4 LT1496

–

+

–

+

A3

1/4 LT1496

A1

1/4 LT1496

CHARGER

D1, D2: 1N458

R1 TO R4: CAR6 SERIES IRC (512) 992-7900

SW: PMOS SPECIFIED FOR MAXIMUM LOAD CURRENT

Precision Undervoltage Lockout Circuit

–

+

U2

LT1389

1.250V

U1

1/2 LT1495

SW1

R4

150k

1%

R3

2.05M

1%

R2

3M

0.1%

R1

3.57M

0.1%

Li-Ion

CELL

4.1V

A

B

TO

LOAD

R1, R2: IRC CAR6 SERIES

(512) 992-7900

SW1: PMOS SPECIFIED FOR

MAXIMUM LOAD CURRENT

1M

5%

R5

10M

5%

1389 TA06

TYPICAL APPLICATIO S