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| LTC3612_15 Datasheet, PDF (25/30 Pages) Linear Technology – 3A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter | |||
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Typical Applications
General Purpose Buck Regulator Using Ceramic Capacitors, 2.25MHz
LTC3612
VIN
2.25V TO 5.5V
C2
22µF
RSS
4.7M
CSS
10nF
RC
43k
CC
220pF
C1
22µF
R4
100k
PGOOD
CC1 R5A
10pF 1M
RF
24Ω
CF
1µF
SVIN
RUN
TRACK/SS
PVIN
PVIN_DRV
DDR
RT/SYNC
LTC3612
SW
PGOOD
SGND
ITH
PGND
MODE
VFB
R5B
R2
1M
196k
L1: VISHAY IHLP-2020BZ 0.47µH
L1
470nH
CO1
47µF
R1
392k
C3
22pF
3612 TA02a
VOUT
1.8V
CO2 3A
22µF
Efficiency vs Output Current
100
90
80
70
60
50
40
30
20
10
0
1
VIN = 2.5V
VIN = 3.3V
VIN = 4V
VIN = 5.5V
10
100
1000
OUTPUT CURRENT (mA)
10000
3612 TA02b
Load Step Response in Forced Continuous Mode
VOUT
100mV/DIV
IOUT
1A/DIV
VIN = 3.3V
20µs/DIV
VOUT = 1.8V
IOUT = 100mA TO 3A
VMODE = 1.5V
3612 TA02c
For more information www.linear.com/LTC3612
3612fc
25
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