Datasheet

LTC3642
22
3642fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2008
LT 1010 REV C • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
5V, 50mA Regulator for Automotive Applications
V
IN
LTC3642
RUN
C
IN
1µF
SS
3642 TA06a
SW
V
BATT
12V
V
OUT
*
5V
50mA
V
FB
HYST
I
SET
GND
*V
OUT
= V
BATT
FOR V
BATT
< 5V
L1
220µH
R1
470k
R2
88.7k
C
IN
: TDK C3225X7R2A105M
C
OUT
: KEMET C1210C106K4RAC
L1: COILTRONICS DRA73-221-R
C
OUT
10µF
PART NUMBER DESCRIPTION COMMENTS
LTC3631/LTC3631-3.3/
LTC3631-5
45V, 100mA Synchronous Micropower Step-Down DC/DC
Converter
V
IN
: 4.5V to 45V (60V
MAX
), V
OUT(MIN)
= 0.8V, I
Q
= 12µA,
I
SD
= 3µA, 3mm × 3mm DFN8, MS8E
LTC3632 50V, 20mA Synchronous Micropower Step-Down DC/DC
Converter
V
IN
: 4.5V to 50V (60V
MAX
), V
OUT(MIN)
= 0.8V, I
Q
= 12µA,
I
SD
= 3µA, 3mm × 3mm DFN8, MS8E
LTC1474 18V, 250mA (I
OUT
), High Efficiency Step-Down DC/DC Converter V
IN
: 3V to 18V, V
OUT(MIN)
= 1.2V, I
Q
= 10µA, I
SD
= 6µA, MSOP8
LT1934/LT1934-1 36V, 250mA (I
OUT
), Micropower Step-Down DC/DC Converter
with Burst Mode Operation
V
IN
: 3.2V to 34V, V
OUT(MIN)
= 1.25V, I
Q
= 12µA, I
SD
< 1µA,
ThinSOT
™ Package
LT1939 25V, 2A, 2.5MHz High Efficiency DC/DC Converter and LDO
Controller
V
IN
: 3.6V to 25V, V
OUT(MIN)
= 0.8V, I
Q
= 2.5mA, I
SD
< 10µA,
3mm × 3mm DFN10
LT3437 60V, 400mA (I
OUT
), Micropower Step-Down DC/DC Converter
with Burst Mode Operation
V
IN
: 3.3V to 60V, V
OUT(MIN)
= 1.25V, I
Q
= 100µA, I
SD
< 1µA,
3mm × 3mm DFN10, TSSOP16E
LT3470 40V, 250mA (I
OUT
), High Efficiency Step-Down DC/DC
Converter with Burst Mode Operation
V
IN
: 4V to 40V, V
OUT(MIN)
= 1.2V, I
Q
= 26µA, I
SD
< 1µA,
2mm × 3mm DFN8, ThinSOT
LT3685 36V with Transient Protection to 60V, 2A (I
OUT
), 2.4MHz, High
Efficiency Step-Down DC/DC Converter
V
IN
: 3.6V to 38V, V
OUT(MIN)
= 0.78V, I
Q
= 70µA, I
SD
< 1µA,
3mm × 3mm DFN10, MSOP10E