Datasheet
20
LTC1875
1875f
LINEAR TECHNOLOGY CORPORATION 2001
LT/TP 0403 2K • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
5
12
6
11
3
1
1875 TA03
SWP
SWP
SWN
SWN
V
FB
I
TH
R
C
150k
PLL_LPF
RUN/SS
PGOOD
SGND
8
9
PV
IN
PV
IN
7
10
PGND
PGND
SYNC/MODE
R
SVIN
10Ω
LTC1875
L1
4.7µH
V
OUT
3.3V*
1A**
V
IN
3V TO 4.2V
GND
C
IN1
10µF
C
OUT
47µF
1513
14
2
16
4
SV
IN
C
SVIN
0.1µF
POWER
GOOD
C
C1
47pF
BOLD LINES INDICATE HIGH CURRENT PATHS
C
C2
220pF
R
SS
1M
R
PG
100k
C
SS
0.1µF
C
IN2
10µF
R1
1.29M
R2
412k
C
IN1
, C
IN2
: TAIYO YUDEN CERAMIC JMK316BJ106ML
C
OUT
: TDK CERAMIC C4532X5R0J476M
L1: TOKO A921CY-4R7M
*V
OUT
CONNECTED TO V
IN
FOR 3V < V
IN
< 3.3V
**1A IS THE MAXIMUM OUTPUT CURRENT
TYPICAL APPLICATIO
U
Single Li-Ion to 3.3V/1A Regulator Using All Ceramic Capacitors
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LT
®
1616 500mA (I
OUT
), 1.4MHz High Efficiency Step-Down 90% Efficiency, V
IN
: 3.6V to 25V, V
OUT(MIN)
: 1.25V, I
Q
: 1.9mA,
DC/DC Converter I
SD
: <1µA, ThinSOT
TM
LT1676 450mA (I
OUT
), 100kHz High Efficiency Step-Down 90% Efficiency, V
IN
: 7.4V to 60V, V
OUT(MIN)
: 1.24V, I
Q
: 3.2mA,
DC/DC Converter I
SD
: 2.5µA, S8
LT1765 25V, 2.75A (I
OUT
), 1.25MHz High Efficiency Step-Down 90% Efficiency, V
IN
: 3V to 25V, V
OUT(MIN)
: 1.2V, I
Q
: 1mA,
DC/DC Converter I
SD
: 15µA, S8, TSSOP16E
LT1776 500mA (I
OUT
), 200kHz High Efficiency Step-Down 90% Efficiency, V
IN
: 7.4V to 40V, V
OUT(MIN)
: 1.24V, I
Q
: 3.2mA,
DC/DC Converter I
SD
: 30µA, N8, S8
LTC1878 600mA (I
OUT
), 550kHz Synchronous Step-Down 95% Efficiency, V
IN
: 2.7V to 6V, V
OUT(MIN)
: 0.8V, I
Q
: 10µA,
DC/DC Converter I
SD
: <1µA, MS8
LTC1879 1.2A (I
OUT
), 550kHz Synchronous Step-Down DC/DC Converter 95% Efficiency, V
IN
: 2.7V to 10V, V
OUT(MIN)
: 0.8V, I
Q
: 15µA,
I
SD
: <1µA, TSSOP16
LT1934/LT1934-1 300mA/70mA (I
OUT
), High Efficiency Step-Down V
IN
: 3.2V to 34V, V
OUT(MIN)
: 1.2V, I
Q
: 14µA, I
SD
: <1µA, ThinSOT
DC/DC Converters
LT1940 Dual Output 1.4A (I
OUT
) Constant 1.1MHz, High Efficiency V
IN
: 3V to 25V, V
OUT(MIN)
: 1.2V, I
Q
: 3.8mA, I
SD
: <1µA, TSSOP16E
Step-Down DC/DC Converter
LTC3405/LTC3405B 300mA (I
OUT
), 1.5MHz Synchronous Step-Down 95% Efficiency, V
IN
: 2.7V to 6V, V
OUT(MIN)
: 0.8V, I
Q
: 20µA,
DC/DC Converters I
SD
: <1µA, ThinSOT
LTC3406/LTC3406B 600mA (I
OUT
), 1.5MHz Synchronous Step-Down 95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
: 0.6V, I
Q
: 20µA,
DC/DC Converters I
SD
: <1µA, ThinSOT
LTC3411 1.25A (I
OUT
), 4MHz Synchronous Step-Down DC/DC Converter 95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
: 0.8V, I
Q
: 60µA,
I
SD
: <1µA, 10-Lead MS
LTC3412 2.5A (I
OUT
), 4MHz Synchronous Step-Down DC/DC Converter 95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
: 0.8V, I
Q
: 60µA,
I
SD
: <1µA, TSSOP16E
LTC3430 60V, 2.75A (I
OUT
), 200kHz High Efficiency Step-Down 90% Efficiency, V
IN
: 5.5V to 60V, V
OUT(MIN)
: 1.2V, I
Q
: 2.5mA,
DC/DC Converter I
SD
: 25µA, TSSOP16E
LTC3440 600mA (I
OUT
), 2MHz Synchronous Buck-Boost 95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
: 2.5V, I
Q
: 25µA,
DC/DC Converter I
SD
: <1µA, 10-Lead MS
ThinSOT is a trademark of Linear Technology Corporation.