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LTC3121 Datasheet(PDF) 23 Page - Linear Technology

Part # LTC3121
Description  15V, 1.5A Synchronous Step-Up DC/DC Converter with Output Disconnect
PDF  26 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3121 Datasheet(HTML) 23 Page - Linear Technology

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LTC3121
23
3121fa
For more information www.linear.com/LTC3121
Typical applicaTions
Single Li-Cell 3-LED Driver, 2.5V/4.2V to 175mA
3121 TA08a
VIN
SD
PWM/SYNC
RT
VCC
VOUT
CAP
FB
VC
LTC3121
SGND
PGND
RC
2k
CC
3.9nF
SW
L1
3.3µH
CVCC
4.7µF
VCC
C1
100nF
LT1006
COUT1
22µF
RT
57.6k
VIN
2.5V TO
4.2V
CIN
4.7µF
ON
OFF
CIN, CVCC: 4.7µF, 6.3V, X7R, 1206
C1: 100nF, 6.3V, X7R, 1206
COUT: 22µF, 16V, X7R, 1812
L1: TDK SPM6530T-3R3M
D1, D2, D3: CREE XPGWHT-L1-0000-00G51
+
–
R1
1.02M
R2
30.9k
RS
0.2
D1
D2
D3
VIN (V)
2.5
100
10
20
30
40
50
60
1.0
0.3
0.4
0.5
0.6
0.2
0.1
4.1 4.3
2.7 2.9 3.1
3121 TA08b
3.9
3.5 3.7
3.3
EFFICIENCY
POWER LOSS



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