Datasheet LP2951 (Microchip) - 4

LP2951 + 6V
120kΩ
1.5 kΩ** 1N457
SEALED
LEADACID
BATTERY FB
LM385
SOURCE
– ≈ 400 kΩ*
FOR 5.5V 3 100 kΩ 8
+V IN
VOUT 1 MAIN V+ LP2951
SENSE SD 2 MEMORY V+
+
1 μF GND
4 20Ω
+ * Sets disconnect voltage
** Sets disconnect hysteresis NI-CAD
BACKUP
BATTERY For values shown, Regulator shuts down when VIN < 5.5V and turns on again at 6.0V. Current drain in disconnected mode is 150 μA. LOW BATTERY DISCONNECT +VIN 8
+VIN
AUX. SHUTDOWN
INPUT 3 10 kΩ ERROR SD 5 5° PRE-SHUTDOWN FLAG LP2951 OFF VOUT ON GND
4 +
TEMP. LM34 OR
SENSOR
LM35
– 1 FB
7 EXTERNAL CIRCUIT
PROTECTED FROM
OVER TEMPERATURE
(V+ GOES OFF WHEN
TEMP.> 125°) OR
RELAY 8.2 kΩ LM34 for 125°F Shutdown
LM35 for 125°C Shutdown SYSTEM OVER TEMPERATURE
PROTECTION CIRCUIT DS20005736A-page 4  2017 Microchip Technology Inc.