Datasheet

LTC3411A
22
3411afc
For more information www.linear.com/LTC3411A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
 LINEAR TECHNOLOGY CORPORATION 2008
LT 1013 REV C • PRINTED IN USA
[phone]
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FAX: [phone]
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www.linear.com/LTC3411A
relaTeD parTs
PART NUMBER DESCRIPTION COMMENTS
LTC3406A/LTC3406AB 600mA (I
OUT
), 1.5MHz Synchronous Step-Down DC/DC Converters 96% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V,
I
Q
= 20µA, I
SD
< 1µA, ThinSOT™
LTC3407A/LTC3407A-2 Dual 600mA/800mA (I
OUT
), 1.5MHz/2.25MHz Synchronous
Step-Down DC/DC Converters
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V,
I
Q
= 40µA, I
SD
< 1µA, MS10E, DFN
LTC3410/LTC3410B 300mA (I
OUT
), 2.25MHz Synchronous Step-Down DC/DC Converters 95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V,
I
Q
= 26µA, I
SD
< 1µA, SC70
LTC3411 1.25A (I
OUT
), 4MHz Synchronous Step-Down DC/DC Converter 96% Efficiency, V
IN
: 2.6V to 5.5V, V
OUT(MIN)
= 0.8V,
I
Q
= 60µA, I
SD
< 1µA, MS10, 3mm × 3mm DFN
LTC3412A 2.5A (I
OUT
), 4MHz Synchronous Step-Down DC/DC Converter 96% Efficiency, V
IN
: 2.6V to 5.5V, V
OUT(MIN)
= 0.8V,
I
Q
= 62µA, I
SD
< 1µA, TSSOP16E, 4mm × 4mm QFN
LTC3531/LTC3531-3
LTC3531-3.3
200mA (I
OUT
), 1.5MHz Synchronous Buck-Boost DC/DC Converters 95% Efficiency, V
IN
: 1.8V to 5.5V, V
OUT(MIN)
= 2V to 5V,
I
Q
= 16µA, I
SD
< 1µA, ThinSOT, DFN
LTC3532 500mA (I
OUT
), 2MHz 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
= 35µA, I
SD
< 1µA, MS10, DFN
LTC3542 500mA (I
OUT
), 2.25MHz Synchronous Step-Down DC/DC Converter 95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V,
I
Q
= 26µA, I
SD
< 1µA, 2mm × 2mm DFN
LTC3544/LTC3544B
Quad 300mA + 2× 200mA + 100mA, 2.25MHz Synchronous
Step-Down DC/DC Converter
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V,
I
Q
= 70µA, I
SD
< 1µA, 3mm × 3mm QFN
LTC3547/LTC3547B Dual 300mA, 2.25MHz Synchronous Step-Down DC/DC Converters 96% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V,
I
Q
= 40µA, I
SD
< 1µA, 2mm × 3mm DFN
LTC3548/LTC3548-1
LTC3548-2
Dual 400mA/800mA, (I
OUT
), 2.25MHz Synchronous Step-Down
DC/DC Converters
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V,
I
Q
= 40µA, I
SD
< 1µA, MS10E, DFN
LTC3560 800mA (I
OUT
), 2.25MHz Synchronous Step-Down DC/DC Converter 95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V,
I
Q
= 16µA, I
SD
< 1µA, ThinSOT
Typical applicaTion
1mm Height, 2MHz, Li-Ion to 1.8V Converter
OUTPUT CURRENT (mA)
0.1 1 10
0
EFFICIENCY (%)
40
30
100
1000100 10000
3411A TA04b
20
10
60
50
80
70
90
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
V
OUT
= 1.8V
f
O
= 2MHz
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 50mA TO 1.25A
V
OUT
100mV/DIV
AC COUPLED
I
L
1A/DIV
3411A TA04c
40µs/DIV
I
LOAD
1A/DIV
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 250mA TO 1.25A
3411A TA04d
40µs/DIV
V
OUT
100mV/DIV
AC COUPLED
I
L
1A/DIV
I
LOAD
1A/DIV
Efficiency vs Output Current
PV
IN
LTC3411A
PGOOD PGOOD
SW
SV
IN
SYNC/MODE
V
FB
I
TH
SHDN/R
T
L1
0.9µH
V
OUT
1.8V
AT 1.25A
V
IN
2.5V
TO 4.2V
SGND PGND
R5
100k
C4 22pF
R4
178k
R3
13.3k
R1
698k
R2
887k
3411A TA04a
C3
470pF
C2
10µF
×2
C1
10µF
C1, C2: TAIYO YUDEN JMK107BJ106MA
L1: FDK MIPW3226DORGM