LTC3630
26
3630fd
For more information www.linear.com/LTC3630
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
LINEAR TECHNOLOGY CORPORATION 2012
LT 0714 REV D • PRINTED IN USA
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC3630
relaTeD parTs
Typical applicaTion
4.5V to 65V Input to 3.3V Output, 1.5A Regulator
V
OUT
3.3V
1.5A
3630 TA06
D1
L2
2.2µH
R
OSC
105k
R
ITH
4.32k
R1
105k
C
OUT
:
TDK
C3225X5ROJ107M
L2: VISHAY IHLP-2525CZ-01
C
IN
: MURATA GCM32DR72A225KA64L
C1: TDK CGA6P1X7R1C226M
L1: COILCRAFT MSS1048T-333
C
VCC
1µF
C
ITH
1nF
C
OUT
SYNC/MODE
PGOOD
RT
ITH
V
FB
RUN
TRACK/SS
PGND
INTV
CC
PV
IN
PV
IN
BOOST
SW
SW
SW
PGND
PGND
LTC3603
R2
475k
C
BST
0.22µF
C
FB
10pF
V
FB
SW
L1
33µH
V
IN
RUN
R1
200k
C
IN
2.2µF
V
IN
*
X
FBO
I
SET
SS
V
PRG1
V
PRG2
GND
LTC3630
R2
102k
C1
22µF
*WHEN V
IN
> 15V, LTC3630 SWITCHES AND V
X
IS REGULATED TO 15V; WHEN
V
IN
< 15V, LTC3630 OPERATES IN DROPOUT AND V
X
FOLLOWS V
IN
PART NUMBER DESCRIPTION COMMENTS
LTC3630A 76V, 500mA Synchronous Step-Down DC/DC Converter
V
IN
: 4V to 76V, V
OUT(MIN)
= 0.8V, I
Q
= 12µA, I
SD
= 5µA, 3 × 5 DFN-16,
MSOP-16(12)E
LTC3637 76V, 1A Nonsynchronous Step-Down Regulator
V
IN
: 4V to 76V, V
OUT(MIN)
= 0.8V, I
Q
= 12µA, I
SD
= 3µA, 3 × 5 DFN-16,
MSOP-16(12)E
LTC3639 150V, 100mA Synchronous Step-Down Regulator V
IN
: 4V to 150V, V
OUT(MIN)
= 0.8V, I
Q
= 12µA, I
SD
= 1.4µA,
MSOP-16(12)E
LTC3638 140V
, 250mA Nonsynchronous Step-Down Regulator V
IN
: 4V to 140V, V
OUT(MIN)
= 0.8V, I
Q
= 12µA, I
SD
= 1.4µA,
MSOP-16(12)E
LTC3642 45V (T
ransient to 60V) 50mA Synchronous Step-Down
DC/DC Converter
V
IN
: 4.5V to 45V, V
OUT(MIN)
= 0.8V, I
Q
= 12µA, I
SD
= 3µA,
3 × 3 DFN-8, MSOP-8
LTC3631 45V (T
ransient to 60V) 100mA Synchronous Step-Down
DC/DC Converter
V
IN
: 4.5V to 45V, V
OUT(MIN)
= 0.8V, I
Q
= 12µA, I
SD
= 3µA,
3 × 3 DFN-8, MSOP-8
LTC3632 50V (T
ransient to 60V) 20mA Synchronous Step-Down
DC/DC Converter
V
IN
: 4.5V to 50V, V
OUT(MIN)
= 0.8V, I
Q
= 12µA, I
SD
= 3µA,
3 × 3 DFN-8, MSOP-8
LT3990 62V
, 350mA, 2.2MHz High Efficiency Micropower Step-Down
DC/DC Converter with I
Q
= 2.5µA
V
IN
: 4.2V to 62V, V
OUT(MIN)
= 1.21V, I
Q
= 2.5µA, I
SD
< 1µA,
3 × 3 DFN-10, MSOP-16E
LT3991 55V
, 1.2A, 2.2MHz High Efficiency Micropower Step-Down
DC/DC Converter with I
Q
= 2.8µA
V
IN
: 4.3V to 55V, V
OUT(MIN)
= 1.19V, I
Q
= 2.8µA, I
SD
< 1µA,
3 × 3 DFN-10, MSOP-10E
LTC3891 Low I
Q
, 60V Synchronous Step-Down Controller V
IN
: 4V to 60V, V
OUT(MIN)
= 0.8V, I
Q
= 50µA, I
SD
= 14µA,
3 × 4 QFN-20, TSSOP-20E
LTC3864 Low I
Q
, High Voltage Step-Down DC/DC Controller with 100%
Duty Cycle
Fixed Frequency 50kHz to 850kHz, 3.5V ≤ V
IN
≤ 60V: 0.8V ≤ V
OUT(MIN)
≤ V
IN
, I
Q
= 40µA, MSOP-12E, 3 × 4 DFN-12
LTC3863 60V, Low I
Q
Inverting DC/DC Controller Fixed Frequency 50kHz to 850kHz, 3.5V ≤ V
IN
≤ 60V, –150V ≤ V
OUT(MIN)
≤ –0.4V, I
Q
= 70µA, MSOP-12E, 3 × 4 DFN-12
