lt1949-1 Linear Technology Corporation, lt1949-1 Datasheet - Page 8

• Manufacturer Part Number: lt1949-1
• Description: 1.1mhz, 1a Switch Pwm Dc/dc Converter
• Manufacturer: Linear Technology Corporation

LT1949-1
8
TYPICAL APPLICATIO
RELATED PARTS
PART NUMBER
LT1302
LT1304
LT1307B
LT1308B
LT1317B
LT1377
LT1613
LT1615
LT1930
LT1949
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
DESCRIPTION
High Output Current Micropower DC/DC Converter
2-Cell Micropower DC/DC Converter
Single Cell Micropower 600kHz PWM DC/DC Converter
2A 600kHz PWM DC/DC Converter
Micropower, 600kHz PWM DC/DC Converter
Monolithic 1MHz, 1.5A Switching Regulator
Single Cell 1.4MHz PWM DC/DC Converter
Micropower Boost Converter in SOT-23
1.2MHz Boost Converter in SOT-23
600kHz, 1A Switch PWM DC/DC Converter
3.3V
V
IN
C1, C2, C5: TAIYO YUDEN LMK325BJ475MF
C4, C6, C8: TAIYO YUDEN EMK316BJ105MF
D1 TO D6: BAT-54S, DUAL DIODE
D7: MBRM120LT3
L1: SUMIDA CLQ4D10-4R7
U
C1
4.7 F
SHUTDOWN
Low Profile Triple Output LCD Bias Generator
SHDN
V
V
IN
C
R1
30.1k
LT1949-1
C3
330pF
4.7 H
L1
D1
GND
SW
FB
D2
C7
0.1 F
COMMENTS
5V/600mA from 2V, 2A Internal Switch, 200 A I
Low-Battery Detector Active in Shutdown
3.3V at 75mA from 1 Cell, MSOP Package
36V Switch, Fixed Frequency Operation, SO-8 and TSSOP Packages
2 Cells to 3.3V at 200mA, MSOP Package
Regulates Positive or Negative Outputs, Ext Synchronization
3.3V to 5V at 200mA, SOT-23 Package
I
1A, 36V Internal Switching, V
1A, 0.5 , 30V Internal Switch, 8-Lead MSOP and SO Packages
40.2k
R3
7.5k
Q
R2
= 20 A, < 1 A in Shutdown, V
C8
1 F
C6
1 F
D3
D5
D6
D4
C9
0.1 F
C2
4.7 F
1949-1 TA02
C5
4.7 F
IN
= 2.6V to 16V
8V
200mA
–8V
10mA
OUT
C4
1 F
19491i LT/TP 0600 4K • PRINTED IN THE USA
LINEAR TECHNOLOGY CORPORATION 2000
Up to 34V
23V
5mA
Q