Datasheet

13
LT3012B
3012bf
+
ADJ
OUTIN
LT3012B
GND
1µF
3.3µF
750k
V
IN
12V
(LATER 42V)
LOAD: CLOCK,
SECURITY SYSTEM
ETC
+
–
ADJ
OUTIN
LT3012B
GND
1µF
3.3µF
V
IN
48V
(72V TRANSIENT)
LOAD:
SYSTEM MONITOR
ETC
NO PROTECTION
DIODE NEEDED!
NO PROTECTION
DIODE NEEDED!
3012B TA05
BACKUP
BATTERY
249k
750k
249k
LT3012B Automotive Application
LT3012B Telecom Application
Constant Brightness for Indicator LED over Wide Input Voltage Range
IN
LT3012B
1µF
RETURN
–48V
OUT
ADJ
GND
3012B TA06
3.3µF
R
SET
I
LED
= 1.24V/R
SET
–48V CAN VARY FROM –4V TO –80V
TYPICAL APPLICATIO S
U