LTC1877 Linear Technology, LTC1877 Datasheet - Page 16

• Manufacturer Part Number: LTC1877
• Description: High Efficiency Monolithic Synchronous Step-Down Regulator
• Manufacturer: Linear Technology

LTC1877
PART NUMBER
LTC1174/LTC1174-3.3 High Efficiency Step-Down and Inverting DC/DC Converters
LTC1174-5
LTC1265
LT
LTC1436/LTC1436-PLL High Efficiency, Low Noise, Synchronous Step-Down Converters 24-Pin Narrow SSOP
LTC1474/LTC1475
LTC1504A
LTC1622
LTC1626
LTC1627
LTC1701
LTC1707
LTC1735
LTC1772
LTC1878
16
TYPICAL
RELATED PARTS
®
1375/LT1376
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
APPLICATION
DESCRIPTION
1.2A, High Efficiency Step-Down DC/DC Converter
1.5A, 500kHz Step-Down Switching Regulators
Low Quiescent Current Step-Down DC/DC Converters
Monolithic Synchronous Step-Down Switching Regulator
Low Input Voltage Current Mode Step-Down DC/DC Controller
Low Voltage, High Efficiency Step-Down DC/DC Converter
Monolithic Synchronous Step-Down Switching Regulator
Monolithic Current Mode Step-Down Switching Regulator
Monolithic Synchronous Step-Down Switching Regulator
High Efficiency, Synchronous Step-Down Converter
Low Input Voltage Current Mode Step-Down DC/DC Controller
High Efficiency Monolithic Step-Down Regulator
***SANYO POSCAP 6TPA47M
**TAIYO YUDEN CERAMIC LMK325BJ106MN
*TOKO D62CB A920CY-100M
U
220pF
1
2
3
4
Single Lithium-Ion to 3.3V/0.3A Regulator
RUN
I
V
GND
TH
FB
LTC1877
SYNC/MODE
PLL LPF
SW
V
IN
8
7
6
5
10 H*
20pF
10
F**
COMMENTS
Monolithic Switching Regulators, I
Burst Mode Operation
Constant Off-Time, Monolithic, Burst Mode Operation
High Frequerncy, Small Inductor, High Efficiency
Monolithic, I
Low Cost, Voltage Mode I
High Frequency, High Efficiency, 8-Pin MSOP
Monolithic, Constant Off-Time, I
Low Supply Voltage Range: 2.5V to 6V
Constant Frequency, I
Regulation, V
Constant Off-Time, I
V
1.19V V
V
16-Pin SO and SSOP, V
550kHz, 6-Pin SOT-23, I
550kHz, MS8, V
IN
IN
887k
280k
from 2.5V to 5.5V
from 2.65V to 8.5V
+
–
REF
47 F***
V
Li-Ion BATTERY
3V TO 4.2V
V
3.3V/0.25A
IN
OUT
Pin, Constant Frequency, I
OUT
IN
from 2.65V to 8.5V
IN
to 250mA, I
up to 6V, I
1877 TA07
OUT
OUT
IN
to 500mA, 1MHz Operation,
OUT
OUT
to 500mA, Secondary Winding
LINEAR TECHNOLOGY CORPORATION 2000
up to 36V, Fault Protection
Q
up to 5A, V
Q
1877i LT/TP 0500 4K • PRINTED IN USA
to 500mA, V
= 10 A, 8-Pin MSOP
= 10 A, I
OUT
OUT
to 600mA,
to 450mA,
OUT
IN
OUT
from 2.2V to 10V
IN
to 600mA,
to 600mA
from 4V to 10V