LTC3548A
20
3548afa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2009
LT 0210 REV A • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
2mm Height Lithium-Ion Single Inductor Buck-Boost Regulator and a Buck Regulator
Efficiency vs Load Current
Efficiency vs Load Current
PART NUMBER DESCRIPTION COMMENTS
LTC3405/LTC3405A 300mA (I
OUT
), 1.5MHz,
Synchronous Step-Down DC/DC Converter
96% Efficiency, V
IN
: 2.5V to 5.5V, 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
96% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 20μA,
I
SD
<1μA, ThinSOT Package
LTC3407/LTC3407-2
LTC3407-3/LTC3407-4/
LTC3407A/LTC3407A-2
600mA/800mA (I
OUT
), 1.5MHz/2.25MHz,
Dual Synchronous Step-Down DC/DC Converter
96% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 40μA,
I
SD
<1μA, MS10E Package, DFN Package
LTC3410/LTC3410B 300mA (I
OUT
), 2.25MHz,
Synchronous Step-Down DC/DC Converter in SC70
96% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 26μA,
I
SD
<1μA, SC70 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, MSOP-10 Package
LTC3412/LTC3412A 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, TSSOP-16E Package
LTC3414 4A (I
OUT
), 4MHz,
Synchronous Step-Down DC/DC Converter
95% Efficiency, V
IN
: 2.25V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 64μA,
I
SD
<1μA, TSSOP-28E Package
LTC3440/LTC3441 600mA/1.2A (I
OUT
), 2MHz/1MHz,
Synchronous Buck-Boost DC/DC Converter
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 2.5V, I
Q
= 25μA,
I
SD
<1μA, MSOP-10 Package/DFN Package
LTC3548/
LTC3548-1/LTC3548-2
400mA/800mA (I
OUT
), 2.25MHz,
Dual Synchronous Step-Down DC/DC Converter
95% Efficiency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 40μA,
I
SD
<1μA, MS10E Package/DFN Package
RUN/SS2 V
IN
V
IN
2.8V TO 4.2V
V
OUT2
3.3V
200mA
V
OUT1
1.8V
800mA
RUN/SS1
POR
SW1
V
FB1
GND
V
FB2
SW2
MODE/SYNC
LTC3548A
C1
10μF
R5
100k
POWER-ON
RESET
C4 22pF
L1
2.2μH
L2
15μH
R4
887k
R2
887k
R1
442k
R3
196k
C3
4.7μF
C6
22μF
C2
10μF
3548A TA03a
+
M1
D1
C1, C2, C3: TAIYO YUDEN JMK316BJ106ML
C6: SANYO 6TPB47M
D1: B0540W SCHOTTKY DIODE
L1: TDK VLF3012ST-2R2M1R4
L2: TDK VLF3012ST-150MR49
M1: SILICONIX Si2302
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
30
20
10
70
60
50
40
80
10 100 1000
3548A TA03b
2.8V
V
OUT
= 3.3V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
4.2V
3.6V
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
30
20
10
70
60
50
40
100
90
80
10 100 1000
3548A TA03c
2.8V
V
OUT
= 1.8V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
4.2V
3.6V
