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| LTC3124_15 Datasheet, PDF (24/28 Pages) Linear Technology – 15V, 5A 2-Phase Synchronous Step-Up DC/DC Converter with Output Disconnect | |||
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LTC3124
TYPICAL APPLICATIONS
3.3V to 12V, 300kHz Synchronous Boost Converter
with Output Disconnect, 1A
LB
22µH
VIN
3.3V
LA
22µH
SWB
PGNDB
CAP
VOUTB
C1
100nF
COUT
VOUT
12V
1A
SWA
VOUTA
LTC3124
47µF
Ã3
PGNDA
VIN
SGND
BURST PWM PWM/SYNC SD
CIN
VCC
FB
10µF
RT
VC
CVCC
4.7µF RT
100k
C1: 100nF, 16V, X5R, 0805
CIN: 10µF, 10V, X5R, 1206
COUT: 47µF à 3, 16V, X5R, 1210
CVCC: 4.7µF, 10V, X5R, 1206
LA, LB: WÃRTH WE-PDF 7447998221
OFF ON
RC
76.8k
CC
3.9nF
R1
1.02M
CF
270pF
R2
113k
3124 TA04a
Efficiency
100
90
Burst Mode
OPERATION
80
70
60
PWM
50
40
30
20
10
0
0.01
VCC DERIVED
FROM VIN
VCC DERIVED
FROM VOUT
0.1
1
10
100 1000
LOAD CURRENT (mA)
3124 TA04b
Single Li Cell to 5V, 1.8A Synchronized 1.2MHz Switching Boost
Converter for RFPA Power Supply
VIN
2.7V TO 4.2V
LB
3.3µH
LA
3.3µH
SWB
CAP
PGNDB VOUTB
SWA
VOUTA
LTC3124
PGNDA
C1
100nF
COUT
22µF
Ã2
VIN
2.4MHz SYNC PULSE
SGND
PWM/SYNC SD
CIN
10µF
CVCC
4.7µF
VCC
RT
RT
28.7k
FB
VC
CF
150pF
C1: 100nF, 16V, X7R, 0805
CIN: 10µF, 10V, X7R, 1206
COUT: 22µF à 2, 16V, X7R, 1210
CVCC: 4.7µF, 10V, X7R, 1206
LA, LB: COILCRAFT MSS7341T-332NL
OFF ON
RC
31.6k
CC
1.5nF
VOUT
5V
1.8A
R1
1.47M
R2
464k
3124 TA05a
Efficiency
100
90 Burst Mode
OPERATION
80
70
60
PWM
50
40
30
20
10
0
0.01
0.1
1
10 100
LOAD CURRENT (mA)
4.2VIN
3.3VIN
2.7VIN
1000
3124 TA05b
3124f
24
For more information www.linear.com/LTC3124
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