Datasheet

LT3791-1
22
37911f
98% Efficient 60W (12V 5A) Voltage Regulator Runs Down to 3V V
IN
Typical applicaTions
Efficiency vs Load Current Maximum Output Current vs V
IN
37911 TA02b
LOAD CURRENT (A)
0 1
EFFICIENCY (%)
90
95
100
80
70
50
85
75
55
60
65
2 3 4
5
V
IN
= 3V
V
IN
= 6V
V
IN
= 12V
V
IN
= 28V
V
IN
= 48V
INPUT VOLTAGE (V)
3
0
MAXIMUM OUTPUT CURRENT (A)
1
2
3
4
6
5
7 9 20
37911 TA02c
404
6
8 10 30 50 60
5
D4
C
OUT2
100µF
35V
+
V
IN
3V TO 55V
STARTS UP
FROM 5.5V
INTV
CC
TG1
BG1
SNSP
SNSN
BST1
BST2
BG2
PGND
SW2
TG2
RT
LT3791-1
SWI
C3
1µF
C7
470nF
IVINN
V
IN
IVINP
IVINMON
ISMON
CLKOUT
PWMOUT
TEST1
EN/UVLO
OVLO
V
REF
PWM
CTRL
R8
84.5k
300kHz
V
C
SYNCSS SGND
R1
866k
R2
576k
R
FAULT
100k
R3
1M
R4
57.6k
R7
50Ω
R
IN
0.003Ω
C8
0.1µF
C
SS
33nF
C
C
22nF
37911 TA02a
R
SENSE
0.004Ω
ISP
ISN
FB
C1
0.1µF
L1, 6.8µH
C2
0.1µF
D2D1
M2
M1
M3
M4
C
VCC
4.7µF
C
OUT
10µF
25V
×3
C
IN
4.7µF
100V
×4
R
OUT
0.015Ω
V
OUT
12V
5A
V
O
R5
73.2k
R6
8.06k
R
C
5.1k
D1, D2: NXP BAT46WJ
D3: IRF 10BQ060
D4: IRF 10BQ040
D5, D6: DIODES INC. BAT46W
L1: WURTH ELEKTRONIK WE-HCI 7443556680
M1, M2: RENASAS RJK0651DPB 60V
DS
M3, M4: VISHAY SiR424DP 40V
DS
C
OUT2
: SUNCON 35HVT100M
D6
V
O
D5
D3
SHORT
C/10
CCM
INTV
CC
R9
100k
R10
200k