lt1317b Linear Technology Corporation, lt1317b Datasheet - Page 12
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lt1317b
Manufacturer Part Number
lt1317b
Description
Lt1317b - Micropower, 600khz Pwm Dc/dc Converters
Manufacturer
Linear Technology Corporation
Datasheet
1.LT1317B.pdf
(16 pages)
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LT1317/LT1317B
TYPICAL APPLICATIO S
12
(2.7V TO
SINGLE
Li-ION
V
5V
CELL
4.2V)
IN
+
L1: SUMIDA CD54-220
L1: SUMIDA CD43-100
47 F
SHUTDOWN
+
Single Li-Ion to 5V DC/DC Converter
SHUTDOWN
47 F
5V to 12V Boost Converter
SHDN
SHDN
V
V
IN
C
56k
SHDN
LT1317
V
3300pF
V
22 H
IN
C
L1
33k
LT1317
3300pF
10 H
L1
GND
SW
LB0
FB
GND
SW
U
FB
3.3V
MBR0520
124k
1%
+
1.07M
MBR0520
1%
C1: AVX TAJA156M010
C2: MURATA GRM235Y5V106Z01
L1: MURATA LQH3C100 OR SUMIDA CLQ61-100N
D1: MOTOROLA MBR0520LT1
324k
1%
C1
15 F
10V
+
1%
1M
Low Profile 3.3 to 5V Converter
1317 TA04
+
C2
47 F
V
12V
150mA
OUT
1317 TA05
47 F
V
5V
250mA
SHDN
V
OUT
V
LT1317BCMS8
IN
C
33k
3.3nF
10 H
L1
GND
SW
FB
D1
332k
Single Li-Ion to 5V DC/DC Converter Efficiency
1M
90
85
80
75
70
90
85
80
75
70
65
60
5V to 12V Boost Converter Efficiency
1
1
1317 TA06
C2
10 F
CERAMIC
5V
125mA
LOAD CURRENT (mA)
LOAD CURRENT (mA)
V
V
V
IN
IN
IN
10
= 2.7V
= 3.5V
= 4.2V
10
100
100
1317 TA04a
1317 TA05a
1000