LT1940/LT1940L
U
TYPICAL APPLICATIO
Low Ripple, Low Profile 5V to 3.3V/2.4A Maximum Height = 1.4mm
0.47µF
V
IN
4.8V TO 7V
V
D3B
D3A
C3
2.2µF
IN
BOOST1
SW1
RUN/SS1
1nF
0.1µF
L1
3.3µH
RUN/SS2
PG1
OUT2
3.3V
2.4A
100k
D1
PG2
PGOOD
LT1940L
V
C1
V
C2
D4B
D4A
4.7k
1500pF
BOOST2
0.1µF
FB1
FB2
L2
3.3µH
330pF
16.5k
SW2
GND
D2
C1
20µF
10k
1940 TA07
D1, D2: MICROSEMI UPS120
D3, D4: BAT-54S
L1, L2: COILCRAFT LPO1704-332M
C1: 2X TAIYO YUDEN JMK212BJ106ML
C3: 2X TAIYO YUDEN EMK212BJ105MN
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1765
25V, 2.75A (I ), 1.25MHz,
High Efficiency Step-Down DC/DC Converter
V : 3V to 25V, V
S8, TSSOP16E Package
: 1.20V, I : 1mA, I : 15µA
OUT
IN
OUT(MIN) Q SD
LT1766
LT1767
LT1944
LT1944-1
LT1945
LT1956
60V, 1.2A (I ), 200kHz,
High Efficiency Step-Down DC/DC Converter
V : 5.5V to 60V, V
TSSOP16/TSSOP16E Package
: 1.2V, I : 2.5mA, I : 25µA
OUT(MIN) Q SD
OUT
IN
25V, 1.2A (I ), 1.25MHz,
V : 3V to 25V, V : 1.2V, I : 1mA, I : 6µA
OUT
IN
OUT(MIN)
Q
SD
High Efficiency Step-Down DC/DC Converter
MS8, MS8E Package
Dual Output 350mA I , Constant Off-Time,
V : 1.2V to 15V, V
MS Package
: 34V, I : 20µA, I : <1µA,
Q SD
SW
IN
OUT(MAX)
OUT(MAX)
OUT(MAX)
High Efficiency Step-Up DC/DC Converter
Dual Output 150mA I , Constant Off-Time,
V : 1.2V to 15V, V
: 34V, I : 20µA, I : <1µA,
Q SD
SW
IN
High Efficiency Step-Up DC/DC Converter
MS Package
Dual Output, Pos/Neg, 350mA I , Constant Off-Time,
High Efficiency Step-Up DC/DC Converter
V : 1.2V to 15V, V
IN
: ±34V, I : 20µA, I : <1µA,
Q SD
SW
MS Package Package
60V, 1.2A (I ), 500kHz,
V : 5.5V to 60V, V
: 1.2V, I : 2.5mA, I : 25µA
Q SD
OUT
IN
OUT(MIN)
High Efficiency Step-Down DC/DC Converter
TSSOP16/TSSOP16E Package
LTC3407
LTC3411
Dual 600mA, 1.5MHz, Synchronous Step-Down Regulator V : 2.5V to 5.5V, V
: 0.6V, I : 40µA, MSE Package
OUT(MIN) Q
: 0.8V, I : 60µA, I : <1µA
OUT(MIN) Q SD
IN
1.25A (I ), 4MHz,
V : 2.5V to 5.5V, V
MS Package
OUT
IN
Synchronous Step-Down DC/DC Converter
LTC3412
LT3430
2.5A (I ), 4MHz,
Synchronous Step-Down DC/DC Converter
V : 2.5V to 5.5V, V
TSSOP16E Package
: 0.8V, I : 60µA, I : <1µA
OUT
IN
OUT(MIN) Q SD
60V, 2.75A (I ), 200kHz,
V : 5.5V to 60V, V
: 1.20V, I : 2.5mA, I : 25µA
OUT
IN
OUT(MIN) Q SD
High Efficiency Step-Down DC/DC Converter
TSSOP16E Package
LTC3701
Two Phase,Dual, 500kHz, Constant Frequency,
Current Mode, High Efficiency Step-Down
DC/DC Controller
V : 2.5V to 10V, V
SSOP-16 Package
: 0.8V, I : 460µA, I : 9µA
OUT(MIN) Q SD
IN
1940fa
LT/TP 0204 1K REV A • PRINTED IN USA
20 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
LINEAR TECHNOLOGY CORPORATION 2001
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
Linear [ Linear ]
