LP2951-4.8BM Micrel Semiconductor, LP2951-4.8BM Datasheet - Page 13

• Manufacturer Part Number: LP2951-4.8BM
• Description: 100mA Low-Dropout Voltage Regulator
• Manufacturer: Micrel Semiconductor

LP2950/2951
February 1999
For values shown, Regulator shuts down when V
* Sets disconnect voltage
** Sets disconnect hysteresis
LM34 for 125 F Shutdown
LM35 for 125 C Shutdown
+
FOR 5.5V
ON
AUX. SHUTDOWN
400k *
SENSOR
6V
SEALED
LEAD-
ACID
BATTERY
SOURCE
TEMP.
INPUT
LM34 OR
OFF
FB
120k
LM35
–
+
3
LM385
SD
System Over Temperature Protection Circuit
–
1.5k **
100k
GND
MIC2951
4
+V IN
+V IN
IN
< 5.5 V and turns on again at 6.0 V. Current drain in disconnected mode is 150 A.
8
Low Battery Disconnect
1N457
ERROR
FB
V
3
7
OUT
8.2k
SD
5
1
3-47
LP2951
+V IN
GND
10k
5 PRE-SHUTDOWN FLAG
8
4
SENSE
OVER TEMPERATURE
(V+ GOES OFF WHEN
V
EXTERNAL CIRCUIT
PROTECTED FROM
OUT
TEMP.> 125 )
1
2
1µF
+
+
MAIN V+
MEMORY V+
OR
20
NI-CAD
BACKUP
BATTERY
RELAY
Micrel
3