Datasheet
LT3971/LT3971-3.3/LT3971-5
23
3971fd
TYPICAL APPLICATIONS
1.8V Step-Down Converter
10pF
SW
FB
SS
RT
V
IN
V
IN
4.3V TO 27V
V
OUT
1.8V
1.2A
4.7µF
0.47µF
100µF
1M
118k
f = 400kHz
4.7µH
511k
GND
SYNC
OFF ON
LT3971
3971 TA05
EN BOOST
PG
BD
12V Step-Down Converter
3.3V Step-Down Converter with Undervoltage Lockout, Soft-Start, and Power Good
10pF
SW
FB
SS
RT
V
IN
V
IN
15V TO 38V
V
OUT
12V
1.2A
10µF
0.47µF
10µF
110k
49.9k
f = 800kHz
10µH
1M
GND
BD
SYNC
OFF ON
LT3971
3971 TA06
EN BOOST
PG
10pF
SW
FB
SS
RT
V
IN
V
IN
6V TO 38V
V
OUT
3.3V
1.2A
4.7µF
0.47µF
22µF
562k
49.9k
4.7µH
1M
GND
PG PGOOD
SYNC
LT3971
3971 TA07
EN
BOOST
BD
150k
5M
1M
100k
1nF
f = 800kHz
5V, 2MHz Step-Down Converter with Soft-Start
10pF
SW
FB
SS
RT
V
IN
V
IN
9V TO 25V
V
OUT
5V
1.2A
2.2µF
0.47µF
22µF
309k
11k
f = 2MHz
2.2µH
1M
GND
BD
SYNC
OFF ON
LT3971
3971 TA08
EN BOOST
PG
1nF