Datasheet

LT3507
25
3507fa
TYPICAL APPLICATIONS
5V, 3.3V, 2.5V and 1.8V with Coincident Tracking
V
IN1
BOOST1 UVLO
OVLO
BOOST2
SW2
FB2
V
C2
BIAS
DRIVE
FB4
PGOOD1
PGOOD2
PGOOD3
PGOOD1
PGOOD2
PGOOD3
SW1
FB1
V
C1
TRK/SS1
BOOST3
0.22μF
22μF
100μF
D1
18.7k
680pF
18.7k
4.7μH
V
OUT1
1.8V
2.4A
V
IN
6V TO 36V
V
OUT3
5V
1.5A
15μH
10μH
V
IN2
V
IN3
V
INSW
49.9k
18.2k
100k
V
OUT1
15k
SW3
FB3
V
C3
R
T
/SYNC TRK/SS4
GND
LT3507
RUN1
RUN2
RUN3
0.22μF
0.22μF
22μF
22μF
D2
D3
24.3k
16.2k
SHDN
680pF
0.01μF
1000pF
53.6k
L1: WÜRTH WE-PD 744 778 9004
L2: WÜRTH WE-PD 744 778 9115
L3: WÜRTH WE-PD 744 778 910
D1, D2, D3: DIODES, INC. B240A
Q1: ON SEMICONDUCTOR NSS30101LT1G
11.5k
11.5k
24.3k
3507 TA03
105k
f
SW
= 450kHz
10.2k
2.2nF
22μF
100k 100k
V
OUT2
3.3V
1.3A
V
OUT4
2.5V
0.2A
35.7k
TRK/SS3
TRK/SS2 TRK/SS2
V
OUT2
V
OUT2
15k
18.7k
35.7k
11.5k
TRK/SS2
Q1