22
LTC1625
TYPICAL APPLICATIONS
U
5V/4.5A Positive to Negative Converter
C
IN
: SANYO 16SV220M
C
OUT
: SANYO 6SV470M
L1: MAGNETICS Kool-Mµ 77120-A7, 9 TURNS, 17 GAUGE
C
SS
0.1µF
R
C
10k
C
C1
2.2nF
V
IN
5V TO 10V
V
OUT
5V 
4.5A
1625TA08
D
B
CMDSH-3
M2
FDS6670A
L1
6µH
C
VCC
4.7µF
C
IN
220µF
16V
+
+
C
OUT
470µF
6.3V
+
D
1
MBR140T3
V
IN
TK
EXTV
CC
LTC1625
SYNC
V
PROG
SW
TG
BOOST
INTV
CC
BG
RUN/SS
FCB
I
TH
SGND
V
OSENSE
PGND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C
C2
220pF
C
F
0.1µF
M1
FDS6670A
C
B
0.22µF
R
F
4.7
C
IN
: SANYO 20S68M
C
OUT
: SANYO 16SA100M
L1: 7A, 18µH Kool-Mµ 77120-A7, 15 TURNS, 17 GAUGE
C
SS
0.1µF
R
C
10k
C
C1
2.2nF
V
IN
6V TO 18V
V
OUT
12V
1625TA09
D
B
CMDSH-3
D4
BAT85
L1
18µH
C
VCC
4.7µF
C
IN
68µF
20V
x2
+
+
C
OUT
100µF
16V
30m
x2
+
D2
MBRS340T3
D5
BAT85
D1
MBRS
340T3
Z1
MMBZ
5240
10V
V
IN
TK
EXTV
CC
LTC1625
SYNC
V
PROG
SW
TG
BOOST
INTV
CC
BG
RUN/SS
FCB
I
TH
SGND
V
OSENSE
PGND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C
C2
220pF
C
F
0.1µF
M1
Si4420DY
M2
Si4420DY
M3
Si4420DY
M4
Si4425DY
C
B
0.33µF
R
F
4.7
R1
3.92k
R2
35.7k
R1
100k
4
6
5
3
8
2
17
C1
470pF
C2
0.1µF
D3
BAT85
1/2
LTC1693-2
1/2
LTC1693-2
V
IN
18
12
6
I
OUT
4.0
3.3
2.0
Single Inductor, Positive Output Buck Boost
23
LTC1625
PACKAGE DESCRIPTION
U
Dimensions in inches (millimeters) unless otherwise noted.
0.016 – 0.050
0.406 – 1.270
0.010 – 0.020
(0.254 – 0.508)
× 45°
0° – 8° TYP
0.008 – 0.010
(0.203 – 0.254)
1
2
3
4
5
6
7
8
0.150 – 0.157**
(3.810 – 3.988)
16
15
14
13
0.386 – 0.394*
(9.804 – 10.008)
0.228 – 0.244
(5.791 – 6.197)
12
11 10
9
S16 0695
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
TYP
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH 
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD 
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**
S Package
16-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
GN Package
16-Lead Plastic SSOP (Narrow 0.150)
(LTC DWG # 05-08-1641)
GN16 (SSOP) 0398
* DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
 SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
 FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
12
3
4
5
6
7
8
0.229 – 0.244
(5.817 – 6.198)
0.150 – 0.157**
(3.810 – 3.988)
16
15
14
13
0.189 – 0.196*
(4.801 – 4.978)
12 11 10
9
0.016 – 0.050
(0.406 – 1.270)
0.015 ± 0.004
(0.38
± 0.10)
× 45°
0° – 8° TYP
0.007 – 0.0098
(0.178 – 0.249)
0.053 – 0.068
(1.351 – 1.727)
0.008 – 0.012
(0.203 – 0.305)
0.004 – 0.0098
(0.102 – 0.249)
0.025
(0.635)
BSC
0.009
(0.229)
REF
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
24
LTC1625
LINEAR TECHNOLOGY CORPORATION 1998
1625f LT/TP 1298 4K • PRINTED IN USA
PART NUMBER DESCRIPTION COMMENTS
LTC1435A High Efficiency Synchronous Step-Down Controller Optimized for Low Duty Cycle Battery to CPU Power Applications
LTC1436A-PLL High Efficiency Low Noise Synchronous Step-Down Controller PLL Synchronization and Auxiliary Linear Regulator
LTC1438 Dual High Efficiency Step-Down Controller Power-On Reset and Low-Battery Comparator
LTC1530 High Power Synchronous Step-Down Controller SO-8 with Current Limit, No R
SENSE
Saves Space, Fixed
Frequency Ideal for 5V to 3.3V
LTC1538-AUX Dual High Efficiency Step-Down Controller 5V Standby Output and Auxiliary Linear Regulator
LTC1649 3.3V Input High Power Step-Down Controller 2.7V to 5V Input, 90% Efficiency, Ideal for 3.3V to 1.xV – 2.xV
Up to 20A
RELATED PARTS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
FAX: (408) 434-0507
www.linear-tech.com
3.3V/1.8A Fixed Output
+
C
IN
: AVX TPSD156M035R0300
C
OUT
: AVX TPSD107M010R0100
L1: SUMIDA CDRH125-270MC
C
SS
0.1µF
R
C
10k
C
C1
1nF
C
C2
100pF
C
IN
15µF
35V
×2
V
IN
5V TO 28V
V
OUT
3.3V
1.8A
M2
1/2 Si4936DY
D1
MBRS140T3
M1
1/2 Si4936DY
C
VCC
4.7µF
1625 TA07
OPEN
C
B
0.1µF
D
B
CMDSH-3
L1
27µH
+
C
OUT
100µF
10V
0.1Ω
×2
+
V
IN
TK
EXTV
CC
LTC1625
SYNC
V
PROG
SW
TG
BOOST
INTV
CC
BG
RUN/SS
FCB
I
TH
SGND
V
OSENSE
PGND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
TYPICAL APPLICATION
U

LTC1625IS#PBF

Mfr. #:
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators NoRsense Current Mode DC/DC
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union