LT3012 LINER [Linear Technology], LT3012 Datasheet - Page 13

• Manufacturer Part Number: LT3012
• Description: 250mA, 4V to 80V Low Dropout Micropower Linear Regulator
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIONS
LOW
OPERATING
CURRENT
TO 60V
5.5V*
HIGH
V
IN
C3
4.7μF
100V
CERAMIC
5V Buck Converter with Low Current Keep Alive Backup
15
14
14
11
4
100
90
70
60
50
80
V
SHDN
SYNC
IN
SHDN
GND
IN
0
V
L = 68μH
1, 8, 9, 16
OUT
BOOST
LT1766
LT3012
GND
Effi ciency vs Load Current
= 5V
0.25
6
1
BIAS
V
OUT
ADJ
SW
C
FB
Buck Converter
11
LOAD CURRENT (A)
C
1nF
0.50
2
10
12
C
3
5
V
V
750k
249k
IN
IN
0.75
= 10V
= 42V
D1
10MQ060N
C2
0.33μF
*
†
FOR INPUT VOLTAGES BELOW 7.5V,
SOME RESTRICTIONS MAY APPLY
INCREASE L1 TO 30μH FOR LOAD
CURRENTS ABOVE 0.6A AND TO
60μH ABOVE 1A
1.00
15μH
L1
3012 TA04
†
D1N914
R1
15.4k
R2
4.99k
1.25
D2
+
C1
100μF 10V
SOLID
TANTALUM
3012 TA03
V
5V
1A/250mA
OUT
LT3012
13
3012fd