LT3681
U
TYPICAL APPLICATIO
1.265V Step-Down Converter
V
V
OUT
1.265V
2A
IN
3.6V TO 27V
V
BD
IN
RUN/SS
BOOST
ON OFF
L
3.3
0.47
F
H
V
SW
DC
C
LT3681
GND
4.7
F
RT
PG
DA
13k
BIAS
105k
FB
330pF
47
F
f = 500kHz
3681 TA10
L: NEC PLC-0745-3R3
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
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60V, 1.2A (I ), 200kHz, High Efficiency Step-Down DC/DC
V
= 1.20V, I = 2.5mA, I 25μA
Q SD
OUT
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
Converter
TSSOP16E Package
25V, 1.2A (I ), 1.2MHz, High Efficiency Step-Down DC/DC
V
= 3.0V to 25V, V
= 1.20V, I = 1mA, I < 6μA
Q SD
OUT
IN
Converter
MS8E Package
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V
= 3.6V to 36V, V
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Q SD
OUT
IN
ThinSOT Package
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V
= 3.6V to 36V, V
= 1.2V, I = 1.9mA, I < 1μA
Q SD
OUT
IN
MS8E Package
Dual 25V, 1.4A (I ), 1.1MHz, High Efficiency Step-Down DC/DC
Converter
V
= 3.6V to 25V, V
= 1.20V, I = 3.8mA, I < 30μA
Q SD
OUT
IN
TSSOP16E Package
LT1976/LT1977 60V, 1.2A (I ), 200kHz/500kHz, High Efficiency Step-Down DC/DC
V
= 3.3V to 60V, V
= 1.20V, I = 100μA, I < 1μA
Q SD
OUT
IN
Converter with Burst Mode
TSSOP16E Package
LT3434/LT3435 60V, 2.4A (I ), 200/500kHz, High Efficiency Step-Down DC/DC
V
IN
= 3.3V to 60V, V
= 1.20V, I = 100μA, I < 1μA
Q SD
OUT
Converter with Burst Mode
TSSOP16E Package
LT3437
LT3480
LT3481
LT3493
LT3505
LT3508
LT3684
LT3685
60V, 400mA (I ), MicroPower Step-Down DC/DC Converter with
V
IN
= 3.3V to 60V, V
= 1.25V, I = 100μA, I < 1μA
Q SD
(3mm × 3mm) DFN-10 TSSOP16E Package
OUT
Burst Mode
36V with Transient Protection to 60V, 2A (I ), 2.4MHz, High
V
IN
= 3.6V to 38V, V = 0.78V, I = 70μA, I < 1μA
OUT
OUT
Q
SD
Efficiency Step-Down DC/DC Converter with Burst Mode Operation
(3mm × 3mm) DFN-10 MSOP10E Package
34V with Transient Protection to 36V, 2A (I ), 2.8MHz, High
V
IN
= 3.6V to 34V, V = 1.265V, I = 50μA, I < 1μA
OUT
OUT
Q
SD
Efficiency Step-Down DC/DC Converter with Burst Mode Operation
(3mm × 3mm) DFN-10 MSOP10E Package
36V, 1.4A (I ), 750kHz High Efficiency Step-Down DC/DC Converter
V
IN
= 3.6V to 36V, V = 0.8V, I = 1.9mA, I < 1μA
OUT
OUT
Q
SD
(2mm × 3mm)DFN-6 Package
V = 3.6V to 34V, V = 0.78V, I = 2mA, I < 2μA
IN
36V with Transient Protection to 40V, 1.4A (I ), 3MHz, High
OUT
OUT
Q
SD
Efficiency Step-Down DC/DC Converter
(3mm × 3mm) DFN-8 MSOP8E Package
36V with Transient Protection to 40V, Dual 1.4A (I ), 3MHz, High
V
IN
= 3.7V to 37V, V = 0.8V, I = 4.6mA, I < 1μA
OUT
OUT
Q
SD
Efficiency Step-Down DC/DC Converter
(4mm × 4mm) QFN-24 TSSOP16E Package
34V with Transient Protection to 36V, 2A (I ), 2.8MHz, High
V
IN
= 3.6V to 34V, V = 01.26V, I = 850mA, I < 1μA
OUT
OUT
Q
SD
Efficiency Step-Down DC/DC Converter
(3mm × 3mm) DFN-10 MSOP10E Package
36V with Transient Protection to 60V, 2A (I ), 2.4MHz, High
V
IN
= 3.6V to 38V, V = 0.78V, I = 70mA, I < 1μA
OUT
OUT
Q
SD
Efficiency Step-Down DC/DC Converter
(3mm × 3mm) DFN-10 MSOP10E Package
3681f
LT 0407 • PRINTED IN USA
24 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
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© LINEAR TECHNOLOGY CORPORATION 2006
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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