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| LTC3122_15 Datasheet, PDF (20/26 Pages) Linear Technology – 15V, 2.5A Synchronous Step-Up DC/DC Converter with Output Disconnect | |||
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LTC3122
Typical Applications
VIN
3.3V
CIN
4.7µF
3.3V to 12V, 300kHz Synchronous Boost Converter with Output Disconnect, 500mA
L1
10µH
OFF ON
SW
VIN
VOUT
LTC3122
SD
BURST PWM PWM/SYNC
CAP
RT
FB
RT
196k
VCC
SGND
CVCC
4.7µF
VC
PGND
CIN, CVCC: 4.7µF, 6.3V, X7R, 1206
C1: 100nF, 6.3V, X7R, 1206
COUT: 68µF, 16V, X7R, 1812
L1: COILCRAFT MSS1048-103MLB
C1
100nF
RC
154k
CC
1.2nF
R1
1.02M
R2
113k
CF
56pF
VOUT
12V
500mA
COUT
68µF
3122 TA04a
100
90
80
70
60
50
40
30
20
10
0
0.01
10
Burst Mode OPERATION
1
PWM
0.1
PWM POWER LOSS
0.1
1
10
LOAD CURRENT (mA)
0.01
100
3122 TA04b
USB/Battery Powered Synchronous Boost Converter, 4.3V to 5V, 1A
VIN
4.3V TO 5.5V
C2
4.7µF
L1
3.3µH
OFF ON
CIN
4.7µF
SW
VIN
VOUT
LTC3122
SD
PWM/SYNC
CAP
RT
FB
RT
57.6k
VCC
SGND
CVCC
4.7µF
VC
PGND
CIN, CVCC: 4.7µF, 6.3V, X7R, 1206
C1: 100nF, 6.3V, X7R, 1206
COUT: 100µF, 6.3V, X7R, 1812
C2: LELON VE-4R7M1ATR-0305
L1: TDK SPM6530T-3R3M
C1
100nF
RC
43.2k
CC
1nF
R1
383k
R2
121k
CF
68pF
VOUT
5V
1A
COUT
100µF
3122 TA05a
VIN
2V/DIV
VOUT
2V/DIV
INPUT
CURRENT
0.5A/DIV
2ms/DIV
RLOAD = 20â¦
VIN = USB 2.0
PORT HOTPLUGGED
3122 TA05b
3122fa
20
For more information www.linear.com/LTC3122
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