LTC3407A-2 Datasheet, PDF (16/16 Pages) Linear Technology – Dual Synchronous 800mA,2.25MHz Step-Down DC/DC Regulator

LTC3407A-2
TYPICAL APPLICATIO
2mm Height Lithium-Ion Single Inductor Buck-Boost Regulator and a Buck Regulator
V_OUT2 = 3.3V
AT 200mA
+ _C6
47μF
V_IN = 2.8V
TO 4.2V
D1
M1
C1
10μF
L2
10μH
RUN/SS2 V_IN
MODE/SYNC
RUN/SS1
POR
LTC3407A-2
SW2
SW1
R5
100k
POWER-ON
RESET
L1
2.2μH
C4, 22pF
C3
10μF
V_FB2
V_FB1
R4
887k R3
GND
R2
R1 887k
196k
442k
V_OUT1 = 1.8V
AT 800mA
C2
10μF
C1, C2, C3: TAIYO YUDEN JMK316BJ106ML
C6: SANYO 6TPB47M
D1: PHILIPS PMEG2010
L1: MURATA LQH32CN2R2M33
L2: TOKO A914BYW-100M (D52LC SERIES)
M1: SILICONIX Si2302
3407A TA05
Efficiency vs Load Current
90
80
3.6V
70
4.2V
2.8V
60
50
40
30
20
V_OUT = 3.3V
10 ^{Burst Mode OPERATION}
NO LOAD ON OTHER CHANNEL
0
1
10
100
LOAD CURRENT (mA)
1000
3407A2 TA05a
Efficiency vs Load Current
100
90 _2.8V
80
4.2V
70
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
3407A2 TA05b
RELATED PARTS
PART NUMBER
DESCRIPTION
LTC3405/LTC3405A
300mA (I_OUT), 1.5MHz,
Synchronous Step-Down DC/DC Converter
LTC3406/LTC3406B
600mA (I_OUT), 1.5MHz,
Synchronous Step-Down DC/DC Converter
LTC3407/LTC3407-2 600mA/800mA (I_OUT), 1.5MHz/2.25MHz,
LTC3407-3/LTC3407-4/ Dual Synchronous Step-Down DC/DC Converter
LTC3407A
LTC3410/LTC3410B
300mA (I_OUT), 2.25MHz,
Synchronous Step-Down DC/DC Converter in SC70
LTC3411
1.25A (I_OUT), 4MHz,
Synchronous Step-Down DC/DC Converter
LTC3412/LTC3412A
2.5A (I_OUT), 4MHz,
Synchronous Step-Down DC/DC Converter
LTC3414
4A (I_OUT), 4MHz,
Synchronous Step-Down DC/DC Converter
LTC3440/LTC3441
600mA/1.2A (I_OUT), 2MHz/1MHz,
Synchronous Buck-Boost DC/DC Converter
LTC3548/
400mA/800mA (I_OUT), 2.25MHz,
LTC3548-1/LTC3548-2 Dual Synchronous Step-Down DC/DC Converter
16 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
3407a2f
LT 0907 • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2007