LTC1879 LINER [Linear Technology], LTC1879 Datasheet - Page 20

• Manufacturer Part Number: LTC1879
• Description: 1.2A Synchronous Step-Down Regulator with 15mA Quiescent Current
• Manufacturer: LINER [Linear Technology]

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PART NUMBER
LT1616
LT1676
LT1765
LT1766/LT1956
LT1767
LTC
LTC1877
LT1940
LTC3405/LTC3405A 300mA (I
LTC3406/LTC3406B 600mA (I
LTC3411
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ThinSOT is a trademark of Linear Technology Corporation.
LTC1879
20
TYPICAL APPLICATIO
®
1875
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
DESCRIPTION
25V, 500mA (I
Step-Down DC/DC Converter
60V, 440mA (I
Step-Down DC/DC Converter
25V, 2.75A (I
Step-Down DC/DC Converter
60V, 1.2A (I
Step-Down DC/DC Converter
25V, 1.2A (I
Step-Down DC/DC Converter
1.5A, (I
DC/DC Converter
600mA, (I
Step-Down DC/DC Converter
Dual Output 1.4A (I
High Efficiency Step-Down DC/DC Converter
Step-Down DC/DC Converters
Step-Down DC/DC Converters
1.25A (I
Step-Down DC/DC Converter
2.5A (I
Step-Down DC/DC Converter
2.5A (I
Step-Down DC/DC Converter
OUT
OUT
OUT
OUT
OUT
OUT
OUT
), 4MHz, Synchronous
), 4MHz Synchronous
), 550kHz, Synchronous Step-Down
), 4MHz, Synchronous
OUT
OUT
BOLD LINES INDICATE HIGH CURRENT PATHS
), 1.5MHz, Synchronous
), 1.5MHz, Synchronous
OUT
5-Cell NiMH to 3.3V/0.25A ZETA Regulator Using All Ceramic Capacitors
), 550kHz, Synchronous
OUT
OUT
C
0.1 F
C
220pF
), 200kHz/500kHz, High Efficiency V
), 1.25kHz, High Efficiency
SVIN
C2
C
C
C
L1: COILTRONICS CTX5-4
), 1.25MHz, High Efficiency
C
IN1
OUT
: TAIYO YUDEN CERAMIC LMK325BJ106MN
), 1.4MHz, High Efficiency
), 100kHz, High Efficiency
, C
OUT
: TDK CERAMIC C4532X5R0J476M
0.1 F
C
IN2
R
100k
SS
R
U
PG
1M
: TAIYO YUDEN CERAMIC LMK325BJ106MN
), Constant 1.1MHz,
SS
R
150k
C
C
47pF
C1
14
16
2
4
www.linear.com
PGOOD
RUN/SS
PLL_LPF
I
TH
SV
IN
13
LTC1879
SYNC/MODE
PGND
PGND
SGND
15
SWN
SWN
PV
PV
SWP
SWP
V
FB
IN
IN
R
10
SVIN
8
9
7
10
5
12
6
11
3
1
COMMENTS
V
V
V
V
V
V
V
V
V
V
V
V
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
= 3.6V to 25V, V
= 7.4V to 60V, V
= 3V to 25V, V
= 5.5V to 60V, V
= 3V to 25V, V
= 2.7V to 6V, V
= 2.7V to 10V, V
= 3V to 25V, V
= 2.7V to 6V, V
= 2.5V to 5.5V, V
= 2.5V to 5.5V, V
= 2.5V to 5.5V, V
= 2.5V to 5.5V, V
R2
412k
1.3M
10 F
10 F
R1
C
IN1
C
C
•
L1
4.7 H
L1
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
C
10 F
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
IN2
= 1.20V, I
= 1.20V, I
= 1.2V, I
C
47 F
= 0.8V, I
= 0.8V, I
OUT
= 1.20V, I
= 1.25V, I
= 1.24V, I
= 0.8V, I
= 0.6V, I
= 0.8V, I
= 0.8V, I
= 0.8V, I
O
O
O
1879 TA03
O
O
O
= 2.5 A, I
= 15 A, I
= 20 A, I
O
O
O
O
O
O
= 1mA, I
O
= 1mA, I
V
2.8V TO 7.5V
GND
V
3.3V
0.25A
= 10 A, I
= 20 A, I
= 60 A, I
= 60 A, I
= 60 A, I
IN
OUT
= 1.9mA, I
= 3.2mA, I
= 2.5mA, I
LINEAR TECHNOLOGY CORPORATION 2001
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
= <1 A, TSSOP-16
= <1 A, TSSOP-16E
= <1 A, ThinSOT
= 15 A, SO-8, TSSOP16E
= 6 A, SO-8, MS8/E
SD
SD
SD
= <1 A, MS8
= <1 A, ThinSOT
= <1 A, 10-Pin MS
= <1 A, TSSOP16E
= <1 A, TSSOP16E
LT/TP 0303 2K • PRINTED IN USA
= <1 A, ThinSOT
= 2.5 A, SO-8
= 25 A, TSSOP16/E
TM
1879f