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ManualsBrandsLINEAR TECHNOLOGY ManualsPMICsPMIC - linear/switching voltage regulator Arbitrary function QFN 38 (5x7)
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LT3507
25
3507fb
For more information www.linear.com/LT3507
typical applications
3.3V, 5V and 12V from a 24V Input with Ratiometric Tracking
V
IN1
BOOST1 UVLO
OVLO
BOOST3
SW3
FB3
V
C3
BIAS
DRIVE
FB4
PGOOD1
PGOOD2
PGOOD3
PGOOD1
PGOOD2
PGOOD3
SW1
FB1
V
C1
TRK/SS1
TRK/SS2
TRK/SS3
BOOST2
0.1µF
10µF
50V
22µF
D1
16.2k
1000pF
1.5nF
41.2k
L1 3.3µH
V
OUT1
3.3V
2A
V
IN
21V TO 27V
V
OUT2
5V
1.2A
L2 6.8µH
L3 10µH
BAT54
V
IN2
V
IN3
V
INSW
100k
49.9k
4.53k
OVLO = 29V
UVLO = 16V
100k
4.32k
V
OUT1
13.3k
41.2k
BAT54
BAT54
18.2k
SW2
FB2
V
C2
R
T
/SYNC TRK/SS4
GND
LT3507
RUN1
RUN2
RUN3
0.1µF
0.1µF
22µF
10µF
D2
D3
24.3k
26.7k
SHDN
470nF
470pF
61.9k
68.1kNC
V
OUT1
D1: ON SEMI MBRS230LT3
D2, D3: ON SEMI MBRA130LT3
L1: COILCRAFT DO1813H-332ML
L1: COILCRAFT DO1813H-682ML
L1: COILCRAFT DO1813H-103ML
10.7k
3507 TA02
54.9k
f
SW
= 800kHz
11.8k
100k 100k
V
OUT3
12V
1A
150k
V
OUT1
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