LT3976
28
3976f
For more information www.linear.com/3976
LINEAR TECHNOLOGY CORPORATION 2013
LT 0113 • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/3976
relaTeD parTs
Typical applicaTion
1.2V Step-Down Converter
PART NUMBER DESCRIPTION COMMENTS
LT 3480 36V with Transient Protection to 60V, 2A (I
OUT
), 2.4MHz, High
Efficiency Step-Down DC/DC Converter with Burst Mode
®
Operation
V
IN
= 3.6V to 38V, Transients to 60V, V
OUT(MIN)
= 0.78V,
I
Q
= 70µA, I
SD
< 1µA, 3mm × 3mm DFN-10, MSOP-10E
LT 3980 58V with Transient Protection to 80V, 2A (I
OUT
), 2.4MHz, High
Efficiency Step-Down DC/DC Converter with Burst Mode Operation
V
IN
= 3.6V to 58V, Transients to 80V, V
OUT(MIN)
= 0.79V,
I
Q
= 75µA, I
SD
< 1µA, 3mm × 4mm DFN-16, MSOP-16E
LT 3971 38V, 1.2A (I
OUT
), 2MHz, High Efficiency Step-Down
DC/DC Converter with Only 2.8µA of Quiescent Current
V
IN
= 4.2V to 38V, V
OUT(MIN)
= 1.2V, I
Q
= 2.8µA, I
SD
< 1µA,
3mm × 3mm DFN-10, MSOP-10E
LT 3991 55V, 1.2A (I
OUT
), 2MHz, High Efficiency Step-Down
DC/DC Converter with Only 2.8µA of Quiescent Current
V
IN
= 4.2V to 55V, V
OUT(MIN)
= 1.2V, I
Q
= 2.8µA, I
SD
< 1µA,
3mm × 3mm DFN-10, MSOP-10E
LT 3970 40V, 350mA (I
OUT
), 2MHz, High Efficiency Step-Down
DC/DC Converter with Only 2.5µA of Quiescent Current
V
IN
= 4.2V to 40V, V
OUT(MIN)
= 1.2V, I
Q
= 2.5µA, I
SD
< 0.7µA,
2mm × 3mm DFN-10, MSOP-10E
LT 3990 62V, 350mA (I
OUT
), 2.2MHz, High Efficiency Step-Down
DC/DC Converter with Only 2.5µA of Quiescent Current
V
IN
= 4.2V to 62V, V
OUT(MIN)
= 1.2V, I
Q
= 2.5µA, I
SD
< 0.7µA,
3mm × 3mm DFN-10, MSOP-16E
V
IN
EN BOOSTOFF ON
V
IN
4.3V TO 27V
(40V TRANSIENT)
PG
0.47µF
3.3V
47µF
1210
×4
3976 TA08
10nF
10µF
f = 400kHz
D = PDS540
L = IHLP-2525CZ-01
130k
V
OUT
1.2V
5A
2.2µH
LT3976
SS
RT
SW
OUT
FB
SYNC GND
2Ω
470pF
