Datasheet

LT4180
14
4180fb
For more information www.linear.com/4180
Typical applicaTions
12V, 500mA Linear Regulator
12V, 500mA Boost Regulator
R11
15k 1%
R9
5.36k
1%
OV
FB
DIV0DIV1
V
IN
INTV
CC
INTV
CC
V
PP
COMP GND
DRAIN
DIV2
CHOLD1 CHOLD2GUARD2 GUARD3 GUARD4CHOLD3 CHOLD4
C12
47nF
4180 TA03
RUN
R
OSC
C
OSC
R7
2k
1%
SENSE
SPREAD
U2
LT4180EGN
C13
470pF
C11
470pF
C10
470pF
C9
47nF
C7
47pF
D1
DFLS220
L1
4.7µH
OUTPUT TO WIRING AND LOAD
(100mA MINIMUM)
500mA, 6Ω MAX R
WIRE
100µF LOAD CAPACITANCE
VISHAY
IHLP2525CZ-11
C3
1µF
R12
41.7k
1%
C8
10nF
R5
3.65k
1%
R3
61.9k
1%
R13
1.5k
C4
1µF
R1
0.2Ω
1%
OSC
GND
V
IN
5V
C6
0.1µF
R10
84.5k
FAULT
SHDN
V
CC
SYNC RT SS CLKOUT GND
GATE
SW1 SW1 SW1 SW2 SW2 SW2
FB
VC
U1
LT3581EMSE
R2
191k
R6
24.3k
R8
10k
R4
100k
C2
10µF
25V
C1
4.7µF
16V
R8
200k
OV
FB
DIV0DIV1
V
IN
INTV
CC
INTV
CC
V
PP
COMP GND
DRAIN
DIV2
CHOLD1 CHOLD2GUARD2 GUARD3 GUARD4CHOLD3 CHOLD4
C10
33nF
4180 TA02
RUN
R
OSC
C
OSC
R6
2.2k
1%
SENSE
SPREAD
U2
LT4180EGN
C11
470pF
C9
470pF
C8
470pF
C7
47nF
Q1
IRLZ440
OUTPUT TO WIRING AND LOAD
500mA
8Ω MAX R
WIRE
100µF LOAD CAPACITANCE
C2
1µF
R9
41.7k
1%
R4
3.74k
1%
R2
63.4k
1%
C3
1µF
R1
0.2Ω
1%
OSC
GND
V
IN
20V
R3
27k
C4
10µF
25V
C1
4.7µF
25V
R5
5.36k
1%
INTV
CC
C6
330pF
Q2
VN2222
R7
10k