CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025

LP2950 / LP2951

CORPORATION

TYPICAL APPLICATIONS (continued)

LP2951

4

1G-24

GND

8

1

3

SENSE

MAIN V-

MEMORY V+

NI-CAD

BACKUP

BATTERY

CLM385

6V

SEALED

LEAD-

ACID

BATTERY

SOURCE

100K

Ω

1.5K

Ω

120K

Ω

400K

Ω

20K

Ω

FB

IN457

SD

V

OUT

FOR 5.5V

LOW BATTERY DISCONNECT

+

1

µF

+

+V

IN

LP2951

TAP

4

1G-25

SD

GND

6

ERROR

8

1

1

µF

+

3

+V

OUT

39k

Ω

100k

Ω

100k

Ω

100k

Ω

–

+

C4

2

SENSE

= 5V

7

39k

Ω

100k

Ω

1k

Ω

1k

Ω

10k

Ω

20k

Ω

<6.2V**

<6.0V**

<5.8V**

1%

1%

1%

1%

5

R

3

6V

LEAD-

ACID

BATTERY

REGULATOR WITH STATE-OF-CHARGE INDICATOR

RESET

–

+

C1

–

+

C2

–

+

C3

*OPTIONAL LATCH OFF WHEN DROPOUT OCCURS. ADJUST R3 FOR C2 SWITCHING WHEN V

IS 6.0V.

**OUTPUTS GO LOW WHEN V

DROPS BELOW DESIGNATED THRESHHOLDS.

IN

IN