Datasheet

15
LT1302/LT1302-5
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
TYPICAL APPLICATIONS
U
2 Li-Ion Cell to 5.8V/600mA DC/DC Converter
3 Cell to 3.3V Buck-Boost Converter with Auxiliary 12V Regulated Output
1302 TA05
LT1302
GND
PGND
SHDN V
IN
V
C
FB
I
T
SW
SHUTDOWN
169k
1%
200pF
100k
1%
24k
4700pF
10Ω
0.1µF
3
8
T1C
1
10
T1A
7
4
T1D
6
5
T1E
V
IN

2.5V-8V
C3
47µF
16V
+
2
9
T1B
22µF
25V
+
C1
100µF
16V
+
D1
D2
13V
C2
330µF
6.3V
+
3.3V OUTPUT
400mA
330k
1%
3.3µF
+
150k
1%
12V
120mA
T1 =
D1, D2 =
C1 =
C2 =
C3 =

DALE LPE-6562-A069, 1:3:1:1:1 TURNS RATIO, 10µH PRIMARY. DALE [phone]
MOTOROLA MBRS130LT3
AVX TPSE107016R0100
AVX TPSE337006R0100
AVX TPSD476016R0150

LT1121
GND
IN
SHDN
ADJ
OUT
V
IN
I
T
FB
SHDN
SHUTDOWN
L1
22µH
L2
22µH
V
C
PGND
1µF
10Ω
LT1302
GND
SW
20k
1302 TA07
V
OUT

5.8V
600mA
V
IN

4V TO 9V
100k
1%
MBRS130LT3
365k
1%
+
++
C1
100µF
16V
+
C2
220µF
10V
C3
220µF
10V
10nF
DUTY CYCLE =
V
OUT

V
IN
+ V
OUT
PEAK SWITCH VOLTAGE = V
IN
+ V
OUT
 L1, L2=COILCRAFT DO3316-223
 C1=AVX TPSE107016R0100
C2, C3=AVX TPSE227010R0100