LTC3440
22
3440fd
For more information www.linear.com/LTC3440
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
LINEAR TECHNOLOGY CORPORATION 2001
LT 1016 REV D • PRINTED IN USA
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC3440
relateD parts
typical application
PART NUMBER DESCRIPTION COMMENTS
LT1613 550mA(I
SW
), 1.4MHz, High Efficiency Step-Up DC/DC
Converter
90% Efficiency, V
IN
: 0.9V to 10V, V
OUT(MIN)
= 34V, I
Q
= 3mA,
I
SD
= <1µA, ThinSOT™ Package
LT1618 1.5A(I
SW
), 1.25MHz, High Efficiency Step-Up DC/DC
Converter
90% Efficiency, V
IN
: 1.6V to 18V, V
OUT(MIN)
= 35V, I
Q
= 1.8mA,
I
SD
= <1µA, MS10 Package
LTC1877 600mA(I
OUT
), 550kHz, Synchronous Step-Down DC/DC
Converter
95% Efficiency, V
IN
: 2.7V to 10V, V
OUT(MIN)
= 0.8V, I
Q
= 10µA,
I
SD
= <1µA, MS8 Package
LTC1878 600mA(I
OUT
), 550kHz, Synchronous Step-Down DC/DC
Converter
95% Efficiency, V
IN
: 2.7V to 6V, V
OUT(MIN)
= 0.8V, I
Q
= 10µA,
I
SD
= <1µA, MS8 Package
LTC1879 1.2A(I
OUT
), 550kHz, Synchronous Step-Down DC/DC
Converter
95% Efficiency, V
IN
: 2.7V to 10V, V
OUT(MIN)
= 0.8V, I
Q
= 15µA,
I
SD
= <1µA, TSSOP16 Package
LT1961 1.5A(I
SW
), 1.25MHz, High Efficiency Step-Up DC/DC
Converter
90% Efficiency, V
IN
: 3V to 25V, V
OUT(MIN)
= 35V, I
Q
= 0.9mA,
I
SD
= 6µA, MS8E Package
LTC3400/LTC3400B 600mA(I
SW
), 1.2MHz, Synchronous Step-Up DC/DC
Converter
92% Efficiency, V
IN
: 0.85V to 5V, V
OUT(MIN)
= 5V, I
Q
= 19µA/300µA,
I
SD
= <1µA, ThinSOT Package
LTC3401 1A(I
SW
), 3MHz, Synchronous Step-Up DC/DC Converter 97% Efficiency, V
IN
: 0.5V to 5V, V
OUT(MIN)
= 6V, I
Q
= 38µA,
I
SD
= <1µA, MS10 Package
LTC3402 2A(I
SW
), 3MHz, Synchronous Step-Up DC/DC Converter 97% Efficiency, V
IN
: 0.5V to 5V, V
OUT(MIN)
= 6V, I
Q
= 38µA,
I
SD
= <1µA, MS10 Package
LTC3405/LTC3405A 300mA(I
OUT
), 1.5MHz, Synchronous Step-Down DC/DC
Converter
95% Efficiency, V
IN
: 2.7V to 6V, V
OUT(MIN)
= 0.8V, I
Q
= 20µA,
I
SD
= <1µA, ThinSOT Package
LTC3406/LTC3406B 600mA(I
OUT
), 1.5MHz, Synchronous Step-Down DC/DC
Converter
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 20µA,
I
SD
= <1µA, ThinSOT Package
LTC3411 1.25A(I
OUT
), 4MHz, Synchronous Step-Down DC/DC
Converter
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 60µA,
I
SD
= <1µA, MS10 Package
LTC3412 2.5A(I
OUT
), 4MHz, Synchronous Step-Down DC/DC
Converter
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 60µA,
I
SD
= <1µA, TSSOP16E Package
LTC3441/LTC3443 1.2A(I
OUT
), 1MHz/0.6MHz, Micropower Synchronous
Buck-Boost DC/DC Converter
95% Efficiency, V
IN
: 2.4V to 5.5V, V
OUT(MIN)
: 2.4V to 5.25V, I
Q
= 25µA,
I
SD
= <1µA, DFN Package
Efficiency
3440 TA05
OUTPUT CURRENT (mA)
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
0.1 10 100 10001.0
V
IN
= 4.2V
V
IN
= 3.3V
Burst Mode
OPERATION
Li-Ion to 3.3V at 600mA Buck-Boost Converter
SW1
V
IN
SHDN/SS
MODE/SYNC
R
T
SW2
V
OUT
FB
V
C
GND
3
7
8
2
1
4
6
9
10
5
LTC3440
L1
10µH
R1
340k
R2
200k
R3
15k
3440 TA01
R
T
60.4k
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
L1: SUMIDA CDRH6D38-100
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
C1
10µF
Li-Ion
V
IN
=
2.7V TO 4.2V
*
+
C5 1.5nF
C2
22µF
V
OUT
3.3V
600mA
