LTC3548A Datasheet, PDF (20/20 Pages) Linear Technology – Dual Synchronous 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator

LTC3548A
TYPICAL APPLICATION
2mm Height Lithium-Ion Single Inductor Buck-Boost Regulator and a Buck Regulator
V_IN
2.8V TO 4.2V
C1
10μF
V_OUT2
3.3V
200mA +
C6
22μF
D1
M1
L2
15μH
RUN/SS2 V_IN RUN/SS1
MODE/SYNC
POR
SW2 LTC3548A SW1
R5
100k
POWER-ON
RESET
L1
2.2μH
C4 22pF
V_OUT1
1.8V
800mA
V_FB2
V_FB1
C3
4.7μF
R4
R3
887k _196k
GND
R1
442k
R2
887k
C1, C2, C3: TAIYO YUDEN JMK316BJ106ML L1: TDK VLF3012ST-2R2M1R4
C6: SANYO 6TPB47M
L2: TDK VLF3012ST-150MR49
D1: B0540W SCHOTTKY DIODE
M1: SILICONIX Si2302
C2
10μF
3548A TA03a
Efficiency vs Load Current
80
4.2V
70
60
2.8V
3.6V
50
40
30
20
10
V_OUT = 3.3V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
0
1
10
100
LOAD CURRENT (mA)
1000
3548A TA03b
Efficiency vs Load Current
100
90 2.8V
80
70
4.2V
3.6V
60
50
40
30
20 _{VOUT = 1.8V}
10 ^{Burst Mode OPERATION}
NO LOAD ON OTHER CHANNEL
0
1
10
100
LOAD CURRENT (mA)
1000
3548A TA03c
RELATED PARTS
PART NUMBER
LTC3405/LTC3405A
LTC3406/LTC3406B
LTC3407/LTC3407-2
LTC3407-3/LTC3407-4/
LTC3407A/LTC3407A-2
LTC3410/LTC3410B
LTC3411
LTC3412/LTC3412A
LTC3414
LTC3440/LTC3441
LTC3548/
LTC3548-1/LTC3548-2
DESCRIPTION
300mA (I_OUT), 1.5MHz,
Synchronous Step-Down DC/DC Converter
600mA (I_OUT), 1.5MHz,
Synchronous Step-Down DC/DC Converter
600mA/800mA (I_OUT), 1.5MHz/2.25MHz,
Dual Synchronous Step-Down DC/DC Converter
300mA (I_OUT), 2.25MHz,
Synchronous Step-Down DC/DC Converter in SC70
1.25A (I_OUT), 4MHz,
Synchronous Step-Down DC/DC Converter
2.5A (I_OUT), 4MHz,
Synchronous Step-Down DC/DC Converter
4A (I_OUT), 4MHz,
Synchronous Step-Down DC/DC Converter
600mA/1.2A (I_OUT), 2MHz/1MHz,
Synchronous Buck-Boost DC/DC Converter
400mA/800mA (I_OUT), 2.25MHz,
Dual Synchronous Step-Down DC/DC Converter
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
COMMENTS
96% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 20μA,
I_SD <1μA, ThinSOT Package
96% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 20μA,
I_SD <1μA, ThinSOT Package
96% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 40μA,
I_SD <1μA, MS10E Package, DFN Package
96% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 26μA,
I_SD <1μA, SC70 Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 60μA,
I_SD <1μA, MSOP-10 Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 60μA,
I_SD <1μA, TSSOP-16E Package
95% Efficiency, V_IN: 2.25V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 64μA,
I_SD <1μA, TSSOP-28E Package
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
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 40μA,
I_SD <1μA, MS10E Package/DFN Package
3548af
LT 0809 • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2009