LTC1625
TYPICAL APPLICATION
3.3V/1.8A Fixed Output
CSS
0.1µF
1
EXTVCC
2
SYNC
16
VIN
15
TK
3
RUN/SS
14
SW
CC1
1nF
RC
4
LTC1625
OPEN FCB
13
TG
10k
5
12
ITH
BOOST
CC2
100pF
6
SGND
11
INTVCC
7
VOSENSE
8
VPROG
10
BG
9
PGND
DB
CMDSH-3
CVCC
CB 4.7µF
0.1µF
+
CIN: AVX TPSD156M035R0300
COUT: AVX TPSD107M010R0100
L1: SUMIDA CDRH125-270MC
M1
1/2 Si4936DY
L1
27µH
VIN
+ CIN
5V TO 28V
15µF
35V
×2
VOUT
3.3V
1.8A
M2
1/2 Si4936DY
+
COUT
100µF
10V
0.1Ω
×2
D1
MBRS140T3
1625 TA07
RELATED PARTS
PART NUMBER
LTC1435A
LTC1436A-PLL
LTC1438
LTC1530
DESCRIPTION
High Efficiency Synchronous Step-Down Controller
High Efficiency Low Noise Synchronous Step-Down Controller
Dual High Efficiency Step-Down Controller
High Power Synchronous Step-Down Controller
LTC1538-AUX
LTC1649
Dual High Efficiency Step-Down Controller
3.3V Input High Power Step-Down Controller
COMMENTS
Optimized for Low Duty Cycle Battery to CPU Power Applications
PLL Synchronization and Auxiliary Linear Regulator
Power-On Reset and Low-Battery Comparator
SO-8 with Current Limit, No RSENSE Saves Space, Fixed
Frequency Ideal for 5V to 3.3V
5V Standby Output and Auxiliary Linear Regulator
2.7V to 5V Input, 90% Efficiency, Ideal for 3.3V to 1.xV – 2.xV
Up to 20A
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
1625f LT/TP 1298 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1998