ltc3440 Linear Technology Corporation, ltc3440 Datasheet - Page 20

• Manufacturer Part Number: ltc3440
• Description: Micropower Synchronous Buck-boost Dc/dc Converter
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIO
LTC3440
RELATED PARTS
PART NUMBER
LT1613
LT1618
LTC1877
LTC1878
LTC1879
LT1961
LTC3400/LTC3400B
LTC3401
LTC3402
LTC3405/LTC3405A
LTC3406/LTC3406B
LTC3411
LTC3412
LTC3441/LTC3443
ThinSOT is a trademark of Linear Technology Corporation.
20
V
Li-Ion
*1 = Burst Mode OPERATION
IN
0 = FIXED FREQUENCY
= 2.8V TO 4.2V
+
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
Li-Ion to 3.3V at 600mA Buck-Boost Converter
C1
10μF
*
R
60.4k
●
DESCRIPTION
550mA(I
DC/DC Converter
1.5A(I
DC/DC Converter
600mA(I
DC/DC Converter
600mA(I
DC/DC Converter
1.2A(I
DC/DC Converter
1.5A(I
DC/DC Converter
600mA(I
DC/DC Converter
1A(I
DC/DC Converter
2A(I
DC/DC Converter
300mA(I
DC/DC Converter
600mA(I
DC/DC Converter
1.25A(I
DC/DC Converter
2.5A(I
DC/DC Converter
1.2A(I
Buck-Boost DC/DC Converter
3
7
8
2
1
T
FAX: [phone]
SW1
V
SHDN/SS
MODE/SYNC
R
SW
SW
IN
T
SW
OUT
SW
OUT
OUT
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
L1: SUMIDA CDRH4D28-100
), 3MHz, Synchronous Step-Up
), 3MHz, Synchronous Step-Up
LTC3440
OUT
10μH
SW
OUT
OUT
SW
OUT
OUT
), 1.25MHz, High Efficiency Step-Up
), 1.25MHz, High Efficiency Step-Up
), 550kHz, Synchronous Step-Down
), 4MHz, Synchronous Step-Down
), 1MHz/0.6MHz, Micropower Synchronous
L1
), 4MHz, Synchronous Step-Down
), 1.4MHz, High Efficiency Step-Up
), 1.2MHz, Synchronous Step-Up
), 550kHz, Synchronous Step-Down
), 550kHz, Synchronous Step-Down
), 1.5MHz, Synchronous Step-Down
), 1.5MHz, Synchronous Step-Down
V
SW2
GND
OUT
U
FB
V
C
4
6
9
10
5
C5 300pF
●
www.linear.com
15k
R3
R1
340k
R2
200k
220pF
2.2k
3440 TA01
C2
22μF
V
3.3V
600mA
OUT
COMMENTS
90% Efficiency, V
I
90% Efficiency, V
I
95% Efficiency, V
I
95% Efficiency, V
I
95% Efficiency, V
I
90% Efficiency, V
I
92% Efficiency, V
I
97% Efficiency, V
I
97% Efficiency, V
I
95% Efficiency, V
I
95% Efficiency, V
I
95% Efficiency, V
I
95% Efficiency, V
I
95% Efficiency, V
I
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
Q
= 25μA, I
= <1μA, ThinSOT
= <1μA, MS10 Package
= <1μA, MS8 Package
= <1μA, MS8 Package
= <1μA, TSSOP16 Package
= 6μA, MS8E Package
= <1μA, ThinSOT Package
= <1μA, MS10 Package
= <1μA, MS10 Package
= <1μA, ThinSOT Package
= <1μA, ThinSOT Package
= <1μA, MS10 Package
= <1μA, TSSOP16E Package
SD
= <1μA, DFN Package
100
90
80
70
60
50
40
30
20
10
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
0
0.1
: 0.9V to 10V, V
: 1.6V to 18V, V
: 2.7V to 10V, V
: 2.7V to 6V, V
: 2.7V to 10V, V
: 3V to 25V, V
: 0.85V to 5V, V
: 0.5V to 5V, V
: 0.5V to 5V, V
: 2.7V to 6V, V
: 2.5V to 5.5V, V
: 2.5V to 5.5V, V
: 2.5V to 5.5V, V
: 2.4V to 5.5V, V
OPERATION
TM
Burst Mode
Package
V
IN
1.0
OUTPUT CURRENT (mA)
= 4.2V
© LINEAR TECHNOLOGY CORPORATION 2001
Efficiency
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
V
10
IN
= 3.3V
LT 0507 REV B • PRINTED IN USA
= 35V, I
= 0.8V, I
= 6V, I
= 6V, I
= 0.8V, I
= 34V, I
= 35V, I
= 0.8V, I
= 0.8V, I
= 5V, I
: 2.4V to 5.25V,
= 0.6V, I
= 0.8V, I
= 0.8V, I
100
Q
Q
Q
Q
Q
= 38μA,
= 38μA,
Q
Q
Q
= 0.9mA,
Q
Q
= 19μA/300μA,
= 10μA,
= 20μA,
Q
Q
Q
= 3mA,
= 1.8mA,
3440 TA05
= 10μA,
= 15μA,
= 20μA,
= 60μA,
= 60μA,
1000
3440fb