Datasheet

LT3681
24
3681f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2006
LT 0407 • PRINTED IN USA
TYPICAL APPLICATIO
U
RELATED PARTS
SW
BIAS
FB
V
C
PG
RT
V
IN
BD
V
IN
3.6V TO 27V
V
OUT
1.265V
2A
4.7 F
0.47 F
47 F
f = 500kHz
L: NEC PLC-0745-3R3
13k
105k
L
3.3 H
GND
330pF
ON OFF
LT3681
3681 TA10
RUN/SS BOOST
DC
DA
1.265V Step-Down Converter
PART NUMBER DESCRIPTION COMMENTS
LT1766 60V, 1.2A (I
OUT
), 200kHz, High Effi ciency Step-Down DC/DC
Converter
V
IN
= 5.5V to 60V, V
OUT
= 1.20V, I
Q
= 2.5mA, I
SD
25μA
TSSOP16E Package
LT1767 25V, 1.2A (I
OUT
), 1.2MHz, High Effi ciency Step-Down DC/DC
Converter
V
IN
= 3.0V to 25V, V
OUT
= 1.20V, I
Q
= 1mA, I
SD
< 6μA
MS8E Package
LT1933 500mA (I
OUT
), 500kHz Step-Down Switching Regulator in SOT-23 V
IN
= 3.6V to 36V, V
OUT
= 1.2V, I
Q
= 1.6mA, I
SD
< 1μA
ThinSOT Package
LT1936 36V, 1.4A (I
OUT
), 500kHz High Effi ciency Step-Down DC/DC Converter V
IN
= 3.6V to 36V, V
OUT
= 1.2V, I
Q
= 1.9mA, I
SD
< 1μA
MS8E Package
LT1940 Dual 25V, 1.4A (I
OUT
), 1.1MHz, High Effi ciency Step-Down DC/DC
Converter
V
IN
= 3.6V to 25V, V
OUT
= 1.20V, I
Q
= 3.8mA, I
SD
< 30μA
TSSOP16E Package
LT1976/LT1977 60V, 1.2A (I
OUT
), 200kHz/500kHz, High Effi ciency Step-Down DC/DC
Converter with Burst Mode
V
IN
= 3.3V to 60V, V
OUT
= 1.20V, I
Q
= 100μA, I
SD
< 1μA
TSSOP16E Package
LT3434/LT3435 60V, 2.4A (I
OUT
), 200/500kHz, High Effi ciency Step-Down DC/DC
Converter with Burst Mode
V
IN
= 3.3V to 60V, V
OUT
= 1.20V, I
Q
= 100μA, I
SD
< 1μA
TSSOP16E Package
LT3437 60V, 400mA (I
OUT
), MicroPower Step-Down DC/DC Converter with
Burst Mode
V
IN
= 3.3V to 60V, V
OUT
= 1.25V, I
Q
= 100μA, I
SD
< 1μA
(3mm × 3mm) DFN-10 TSSOP16E Package
LT3480 36V with Transient Protection to 60V, 2A (I
OUT
), 2.4MHz, High
Effi ciency Step-Down DC/DC Converter with Burst Mode Operation
V
IN
= 3.6V to 38V, V
OUT
= 0.78V, I
Q
= 70μA, I
SD
< 1μA
(3mm × 3mm) DFN-10 MSOP10E Package
LT3481 34V with Transient Protection to 36V, 2A (I
OUT
), 2.8MHz, High
Effi ciency Step-Down DC/DC Converter with Burst Mode Operation
V
IN
= 3.6V to 34V, V
OUT
= 1.265V, I
Q
= 50μA, I
SD
< 1μA
(3mm × 3mm) DFN-10 MSOP10E Package
LT3493 36V, 1.4A (I
OUT
), 750kHz High Effi ciency Step-Down DC/DC Converter V
IN
= 3.6V to 36V, V
OUT
= 0.8V, I
Q
= 1.9mA, I
SD
< 1μA
(2mm × 3mm)DFN-6 Package
LT3505 36V with Transient Protection to 40V, 1.4A (I
OUT
), 3MHz, High
Effi ciency Step-Down DC/DC Converter
V
IN
= 3.6V to 34V, V
OUT
= 0.78V, I
Q
= 2mA, I
SD
< 2μA
(3mm × 3mm) DFN-8 MSOP8E Package
LT3508 36V with Transient Protection to 40V, Dual 1.4A (I
OUT
), 3MHz, High
Effi ciency Step-Down DC/DC Converter
V
IN
= 3.7V to 37V, V
OUT
= 0.8V, I
Q
= 4.6mA, I
SD
< 1μA
(4mm × 4mm) QFN-24 TSSOP16E Package
LT3684 34V with Transient Protection to 36V, 2A (I
OUT
), 2.8MHz, High
Effi ciency Step-Down DC/DC Converter
V
IN
= 3.6V to 34V, V
OUT
= 01.26V, I
Q
= 850mA, I
SD
< 1μA
(3mm × 3mm) DFN-10 MSOP10E Package
LT3685 36V with Transient Protection to 60V, 2A (I
OUT
), 2.4MHz, High
Effi ciency Step-Down DC/DC Converter
V
IN
= 3.6V to 38V, V
OUT
= 0.78V, I
Q
= 70mA, I
SD
< 1μA
(3mm × 3mm) DFN-10 MSOP10E Package