Datasheet

12
LTC1911-1.5/LTC1911-1.8
1911f
 LINEAR TECHNOLOGY CORPORATION 2001
LT/TP 1102 2K • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
PART NUMBER DESCRIPTION COMMENTS
LTC1514 50mA, 650kHz, Step-Up/Down Charge Pump V
IN
= 2.7V to 10V, V
OUT
= 3V to 5V, I
Q
= 60µA, I
SD
= 10µA,
with Low Battery Comparator S8 Package
LTC1515 50mA, 650kHz, Step-Up/Down Charge Pump V
IN
= 2.7V to 10V, V
OUT
= 3.3V or 5V, I
Q
= 60µA, I
SD
= <1µA,
with Power On Reset S8 Package
LT1776 500mA (I
OUT
), 200kHz, High Efficiency Step-Down 90% Efficiency, V
IN
= 7.4V to 40V, V
OUT
= 1.24V, I
Q
= 3.2mA,
DC/DC Converter I
SD
= 30µA, N8,S8 Packages
LTC3250-1.5 250mA, 1.5MHz, High Efficiency, Step-Down Charge Pump 85% Efficiency, V
IN
= 3.1V to 5.5V, V
OUT
= 1.5V, I
Q
= 35µA,
I
SD
= <1µA, ThinSOT Package
LTC3251 500mA, 1MHz to 1.6MHz, Spread Spectrum, 85% Efficiency, V
IN
= 3.1V to 5.5V, V
OUT
= 0.9V to 1.6V,
Step-Down Charge Pump I
Q
= 9µA, I
SD
= <1µA, MS Package
LTC3404 600mA (I
OUT
), 1.4MHz, Synchronous Step-Down 95% Efficiency, V
IN
= 2.7V to 6V, V
OUT
= 0.8V, I
Q
= 10µA,
DC/DC Converter I
SD
= <1µA, MS8 Package
LTC3405A 300mA (I
OUT
), 1.5MHz, Synchronous Step-Down 95% Efficiency, V
IN
= 2.7V to 6V, V
OUT
= 0.8V, I
Q
= 20µA,
DC/DC Converter I
SD
= <1µA, ThinSOT Package
LTC3406B 600mA (I
OUT
), 1.5MHz, Synchronous Step-Down 95% Efficiency, V
IN
= 2.5V to 5.5V, V
OUT
= 0.6V, I
Q
= 20µA,
DC/DC Converter I
SD
= <1µA, ThinSOT Package
LTC3411 1.25A (I
OUT
), 4MHz, Synchronous Step-Down 95% Efficiency, V
IN
= 2.5V to 5.5V, V
OUT
= 0.8V, I
Q
= 60µA,
DC/DC Converter I
SD
= <1µA, MS Package
LTC3412 2.5A (I
OUT
), 4MHz, Synchronous Step-Down 95% Efficiency, V
IN
= 2.5V to 5.5V, V
OUT
= 0.8V, I
Q
= 60µA,
DC/DC Converter I
SD
= <1µA, TSSOP16E Package
LTC3440 600mA (I
OUT
), 2MHz, Synchronous Buck-Boost 95% Efficiency, V
IN
= 2.5V to 5.5V, V
OUT
= 2.5V, I
Q
= 25µA,
DC/DC Converter I
SD
= <1µA, MS Package
ThinSOT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
U
DC/DC Converter with Shutdown and Soft-Start
V
IN
C2
+
C2
–
GND
8
7
6
5
1
2
3
4
SS/SHDN
C1
+
V
OUT
C1
–
LTC1911-1.5
1µF*
1-CELL Li-Ion
OR
3-CELL NiMH
10µF*
10µF*
2N7002 ON OFF
10nF
1911 TA03
V
OUT
= 1.5V
I
OUT
= 250mA
1µF*
*CERAMIC CAPACITOR
2.7V TO 5.5V INPUT
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