LP2950AS Просмотр технического описания (PDF) - Signal Processing Technologies

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LP2950AS

100 mA Low Dropout Voltage Regulators

Signal Processing Technologies 

TYPICAL APPLICATIONS (continued)

LP2950/LP2951

+ 6V

SEALED

LEAD-

120KΩ ..

1.5KΩ ..

ACID

BATTERY

SOURCE FB

AS385

1N457

FOR 5.5 V

400KΩ ..

100KΩ ..

3

SD

8

+VIN

LP2951

1

VOUT

SENSE

2

GND

4

MAIN V-

+

1uF

MEMORY V+

20KΩ ..

NI-CAD

BACKUP

BATTERY

Fig.4 Low Battery Disconnect

39kΩ ..

RESET

8

5 __+_V_I_N_

ERROR

2

SENSE

1

V OUT

-

LP2951

3

C4

SD

7

+

FB

39kΩ ..

GND

TAP

4

6

+VOUT = 5V

+ 1uF

1%

6V

LEAD-

ACID

1%

BATTERY

100kΩ ..

-

C1

+

1kΩ ..

-

C2

+

1% 1kΩ ..

-

C3

+

10kΩ ..

R3

1% 20kΩ ..

100kΩ ..

100kΩ ..

<5.8V**

100kΩ ..

<6.0V**

<6.2V**

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

VIN IS 6.0V

* OUTPUTS GO LOW WHEN V IN DROPS BELOW DESGNATED THRESHHOLDS

Fig. 5 Regulator with State-of-Charge Indicator

Rev. 11/2/00

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