LTC3633 Datasheet, PDF (28/28 Pages) Linear Technology – Dual Channel 3A, 15V Monolithic Synchronous Step-Down Regulator

LTC3633
TYPICAL APPLICATION
3.3V/1.8V Buck Regulator with 2.5V LDO Output
V_IN
C1
47μF
×2
R5
162k
RUN1 ^VIN2
RUN2
V_{IN1 INTVCC}
ITH1
ITH2
PHMODE
MODE/SYNC
RT
LTC3633 _V2P5
C2
2.2μF
2.5V AT 10mA
V_OUT2
1.8V AT 3A
C_OUT2
47μF
L2
0.68μH ^0.1μF
R4
R3
20k _10k
BOOST2
BOOST1
SW2
V_ON2
V_{FB2 SGND PGND}
SW1
V_ON1
V_FB1
L1
0.1μF _1μH
R1
R2
10k ^45.3k
V_OUT1
3.3V AT 3A
C_OUT1
22μF
3633 TA04
RELATED PARTS
PART
NUMBER
LTC3605
LTC3603
LTC3602
LTC3601
DESCRIPTION
15V, 5A (I_OUT), 4MHz, Synchronous Step-Down
DC/DC Converter
15V, 2.5A (I_OUT), 3MHz, Synchronous Step-Down
DC/DC Converter
10V, 2.5A (I_OUT), 3MHz, Synchronous Step-Down
DC/DC Converter
15V, 1.5A (I_OUT), 4MHz, Synchronous Step-Down
DC/DC Converter
COMMENTS
95% Efficiency, V_IN: 4V to 15V, V_OUT(MIN) = 0.6V, I_Q = 2mA, I_SD < 15μA,
4mm × 4mm QFN-24
95% Efficiency, V_IN: 4.5V to 15V, V_OUT(MIN) = 0.6V, I_Q = 75μA, I_SD < 1μA,
4mm × 4mm QFN-20, MSOP-16E
95% Efficiency, V_IN: 4.5V to 10V, V_OUT(MIN) = 0.6V, I_Q = 75μA, I_SD < 1μA,
3mm × 3mm QFN-16, MSOP-16E
95% Efficiency, V_IN: 4.5V to 15V, V_OUT(MIN) = 0.6V, I_Q = 300μA, I_SD < 1μA,
4mm × 4mm QFN-20, MSOP-16E
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
3633f
LT 0110 • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2010