Datasheet

20
LTC1879
1879f
 LINEAR TECHNOLOGY CORPORATION 2001
LT/TP 0303 2K • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
TYPICAL APPLICATIO
U
5-Cell NiMH to 3.3V/0.25A ZETA Regulator Using All Ceramic Capacitors
5
12
6
11
3
1
1879 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
LTC1879
L1
4.7µH
L1
V
OUT
3.3V
0.25A
V
IN
2.8V TO 7.5V
GND
C
IN1
10µF
C
OUT
47µF
1513
14
2
16
4
SV
IN
C
SVIN
0.1µF
C
C1
47pF
BOLD LINES INDICATE HIGH CURRENT PATHS
C
C2
220pF
C
C
: TAIYO YUDEN CERAMIC LMK325BJ106MN
C
IN1
, C
IN2
: TAIYO YUDEN CERAMIC LMK325BJ106MN
C
OUT
: TDK CERAMIC C4532X5R0J476M
L1: COILTRONICS CTX5-4
R
SS
1M
R
PG
100k
C
SS
0.1µF
C
IN2
10µF
•
•
C
C
10µF
R1
1.3M
R2
412k
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LT1616 25V, 500mA (I
OUT
), 1.4MHz, High Efficiency V
IN
= 3.6V to 25V, V
OUT(MIN)
= 1.25V, I
O
= 1.9mA, I
SD
= <1µA, ThinSOT
TM
Step-Down DC/DC Converter
LT1676 60V, 440mA (I
OUT
), 100kHz, High Efficiency V
IN
= 7.4V to 60V, V
OUT(MIN)
= 1.24V, I
O
= 3.2mA, I
SD
= 2.5µA, SO-8
Step-Down DC/DC Converter
LT1765 25V, 2.75A (I
OUT
), 1.25MHz, High Efficiency V
IN
= 3V to 25V, V
OUT(MIN)
= 1.20V, I
O
= 1mA, I
SD
= 15µA, SO-8, TSSOP16E
Step-Down DC/DC Converter
LT1766/LT1956 60V, 1.2A (I
OUT
), 200kHz/500kHz, High Efficiency V
IN
= 5.5V to 60V, V
OUT(MIN)
= 1.20V, I
O
= 2.5mA, I
SD
= 25µA, TSSOP16/E
Step-Down DC/DC Converter
LT1767 25V, 1.2A (I
OUT
), 1.25kHz, High Efficiency V
IN
= 3V to 25V, V
OUT(MIN)
= 1.20V, I
O
= 1mA, I
SD
= 6µA, SO-8, MS8/E
Step-Down DC/DC Converter
LTC
®
1875 1.5A, (I
OUT
), 550kHz, Synchronous Step-Down V
IN
= 2.7V to 6V, V
OUT(MIN)
= 0.8V, I
O
= 15µA, I
SD
= <1µA, TSSOP-16
DC/DC Converter
LTC1877 600mA, (I
OUT
), 550kHz, Synchronous V
IN
= 2.7V to 10V, V
OUT(MIN)
= 0.8V, I
O
= 10µA, I
SD
= <1µA, MS8
Step-Down DC/DC Converter
LT1940 Dual Output 1.4A (I
OUT
), Constant 1.1MHz, V
IN
= 3V to 25V, V
OUT(MIN)
= 1.2V, I
O
= 2.5µA, I
SD
= <1µA, TSSOP-16E
High Efficiency Step-Down DC/DC Converter
LTC3405/LTC3405A 300mA (I
OUT
), 1.5MHz, Synchronous V
IN
= 2.7V to 6V, V
OUT(MIN)
= 0.8V, I
O
= 20µA, I
SD
= <1µA, ThinSOT
Step-Down DC/DC Converters
LTC3406/LTC3406B 600mA (I
OUT
), 1.5MHz, Synchronous V
IN
= 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
O
= 20µA, I
SD
= <1µA, ThinSOT
Step-Down DC/DC Converters
LTC3411 1.25A (I
OUT
), 4MHz, Synchronous V
IN
= 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
O
= 60µA, I
SD
= <1µA, 10-Pin MS
Step-Down DC/DC Converter
LTC3412 2.5A (I
OUT
), 4MHz, Synchronous V
IN
= 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
O
= 60µA, I
SD
= <1µA, TSSOP16E
Step-Down DC/DC Converter
LTC3430 2.5A (I
OUT
), 4MHz Synchronous V
IN
= 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
O
= 60µA, I
SD
= <1µA, TSSOP16E
Step-Down DC/DC Converter
ThinSOT is a trademark of Linear Technology Corporation.