LT1940 Linear Technology, LT1940 Datasheet - Page 20

• Manufacturer Part Number: LT1940
• Description: Dual Monolithic 1.4A/ 1.1MHz Step-Down Switching Regulator
• Manufacturer: Linear Technology

RELATED PARTS
LT1940
TYPICAL APPLICATIO
PART NUMBER
LT1616
LTC1628
LT1676/LT1776
LT1763
LT1765
LT1766
LT1767
LTC1772
LT1930
LT1962
LT1963
LTC3404
LTC3411
LT3430
ThinSOT is a trademark of Linear Technology Corporation.
20
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
DESCRIPTION
600mA, 1.4MHz Step-Down DC/DC Converter
High Efficiency, 2-Phase Step-Down Switching Regulator
Wide Input Range Step-Down Switching Regulators
500mA, Low Noise, LDO Regulator
3A, 1.25MHz Step-Down DC/DC Converter
Wide Input Range Step-Down Switching Regulator
1.5A, 1.25MHz Step-Down DC/DC Converter
Constant Frequency Step-Down Controller in ThinSOT
1.2MHz Boost DC/DC Converter in ThinSOT
300mA, Low Noise, LDO Regulator
1.5A, Low Noise, LDO Regulator
1.4MHz Synchronous Step-Down Regulator
2MHz, 1.25A, Synchronous Step-Down DC/DC Converter
Wide Input Range Step-Down Switching Regulator
4.8V TO 16V
FAX: [phone] www.linear.com
PGOOD
V
2.2 F
IN
C3
D1, D2: MICROSEMI UPS120
D3, D4: BAT-54S
L1, L2: COILCRAFT LPO1704-332M
C1: 2X TAIYO YUDEN JMK212BJ106ML
C3: 2X TAIYO YUDEN EMK212BJ105MN
1500pF
U
330pF
16.5k
100k
1nF
4.7k
Low Ripple, Low Profile 5V to 3.3V/2.4A
10k
Maximum Height = 1.4mm
RUN/SS1
RUN/SS2
PG1
PG2
V
V
FB1
FB2
C1
C2
LT1940
GND
V
IN
BOOST1
BOOST2
SW1
SW2
0.47 F
COMMENTS
6-Lead ThinSOT
Dual Synchronous Controller
60V Input, 0.7A Internal Switch
20 V
8-Lead SO Package
60V Input, 1.5A Internal Switch
8-Lead MSOP Package
Higher Current, 100% Duty Cycle
1A, 36V Internal Switch
20 V
40 V
High Efficiency, 10 A I
V
60V Input, 3A Internal Switch, TSSOP16E Package
IN
0.1 F
0.1 F
2.5V to 5V, V
RMS
RMS
RMS
D4B
D3B
D1
D2
, I
, I
, Fast Transient Response
Q
Q
= 30 A, 8-Lead SO Package
= 30 A, 8-Lead MSOP Package
TM
OUT
3.3 H
3.3 H
Package
D4A
D3A
L1
L2
to 0.8V, MS10 Package
Q
20 F
, 8-Lead MSOP Package
C1
LINEAR TECHNOLOGY CORPORATION 2001
1940 TA07
OUT2
3.3V
2.4A
LT/TP 0802 1.5K • PRINTED IN USA
1940i