LTC3407-2
16
34072fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2004
LT 0809 REV C • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
2mm Height Lithium-Ion Single Inductor Buck-Boost Regulator and a Buck Regulator
Effi ciency vs Load Current Effi ciency vs Load Current
RUN2 V
IN
V
IN
= 2.8V
TO 4.2V
V
OUT2
= 3.3V
AT 200mA
V
OUT1
= 1.8V
AT 800mA
RUN1
POR
SW1
V
FB1
GND
V
FB2
SW2
MODE/SYNC
LTC3407-2
C1
10μF
R5
100k
POWER-ON
RESET
C4, 22pF
C5, 22pF
L1
2.2μH
L2
10μH
R4
887k
R2
604k
R1
301k
R3
196k
C3
10μF
C6
47μF
C2
10μF
3407 TA04
+
M1
D1
C1, C2, C3: TAIYO YUDEN JMK316BJ106ML
C6: SANYO 6TPB47M
D1: PHILIPS PMEG2010
L1: MURATA LQH32CN2R2M33
L2: TOKO A914BYW-100M (D52LC SERIES)
M1: SILICONIX Si2302
LOAD CURRENT (mA)
1
EFFICIENCY (%)
90
80
70
60
50
40
30
10 100 1000
3407 TA05
V
OUT
= 3.3V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
4.2V
2.8V
3.6V
LOAD CURRENT (mA)
1
EFFICIENCY (%)
100
95
90
85
80
75
70
65
60
10 100 1000
3407 TA06
V
OUT
= 1.8V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
4.2V
2.8V
3.6V
PART NUMBER DESCRIPTION COMMENTS
LTC1878 600mA (I
OUT
), 550kHz, Synchronous Step-Down DC/DC
Converter
95% Effi ciency, V
IN
: 2.7V to 6V, V
OUT(MIN)
= 0.8V, I
Q
= 10μA,
I
SD
<1μA, MSOP-8, Package
LT1940 Dual Output 1.4A(I
OUT)
, Constant 1.1MHz, High Effi ciency
Step-Down DC/DC Converter
V
IN
: 3V to 25V, V
OUT(MIN)
= 1.2V, I
Q
= 2.5mA, I
SD
= <1μA,
TSSOP-16E Package
LTC3252 Dual 250mA (I
OUT
), 1MHz, Spread Spectrum Inductorless
Step-Down DC/DC Converter
88% Effi ciency, V
IN
: 2.7V to 5.5V, V
OUT(MIN)
= 0.9V to 1.6V,
I
Q
= 60μA, I
SD
< 1μA, DFN-12 Package
LTC3405/
LTC3405A
300mA (I
OUT
), 1.5MHz, Synchronous Step-Down DC/DC
Converters
96% Effi ciency, 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
Converters
96% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 20μA,
I
SD
<1μA, ThinSOT Package
LT3407 600mA, 1.5MHz Dual Synchronous Step-Down DC/DC
Converter
96% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 40μA,
I
SD
<1μA, MSE, DFN Package
LTC3411 1.25A (I
OUT
), 4MHz, Synchronous Step Down DC/DC
Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 60μA,
I
SD
<1μA, MSOP-10 Package
LTC3412 2.5A (I
OUT
), 4MHz, Synchronous Step Down DC/DC Converter 95% Effi ciency, 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% Effi ciency, V
IN
: 2.25V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 64μA,
I
SD
<1μA, TSSOP-28E Package
LTC3440 600mA (I
OUT
), 2MHz, Synchronous Buck-Boost DC/DC
Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 2.5V, I
Q
= 25μA,
I
SD
<1μA, MSOP-10 Package
ThinSOT is a trademark of Linear Technology Corporation.
