Datasheet

LT3013
18
3013fe
BOOST
V
IN
6
2
10
12
D1
10MQ060N
R1
15.4k
V
OUT
5V
1A/250mA
4
1
14
11
7
3
5
15
14
11
C
C
1nF
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, 8, 9, 16
LT1766
SHDN
SYNC
SW
BIAS
FB
V
C
GND
C2
0.33µF
C1
100µF 10V
SOLID
TANTALUM
L1
†
15µH
D2
D1N914
R2
4.99k
3013 TA03
750k
249k
C3
4.7µF
100V
CERAMIC
V
IN
5.5V*
TO 60V
+
ADJ
OUTIN
SHDN
PWRGD
LT3013
GND
10
C
T
OPERATING
CURRENT
HIGH
LOW
*
†
100k
1000pF
5V Buck Converter with Low Current Keep Alive Backup
TYPICAL APPLICATIONS
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
90
100
1.00
3013 TA04
70
60
50
0.25
0.50
0.75
1.25
V
IN
= 10V
V
IN
= 42V
V
OUT
= 5V
L = 68µH
+
ADJ
OUTIN
SHDN
LT3013
GND
ON
OFF
1µF
3.3µF
750k
V
IN
12V
(LATER 42V)
LOAD: CLOCK,
SECURITY SYSTEM
ETC
+
–
ADJ
OUTIN
SHDN
LT3013
GND
ON
OFF
1µF
3.3µF
V
IN
48V
(72V TRANSIENT)
LOAD:
SYSTEM MONITOR
ETC
NO PROTECTION
DIODE NEEDED!
NO PROTECTION
DIODE NEEDED!
3013 TA05
BACKUP
BATTERY
249k
750k
249k
LT3013 Automotive Application
LT3013 Telecom Application
Buck Converter
Effi ciency vs Load Current