lt3845ife-trpbf Linear Technology Corporation, lt3845ife-trpbf Datasheet - Page 20

• Manufacturer Part Number: lt3845ife-trpbf
• Description: High Voltage Synchronous Current Mode Step-down Controller With Adjustable Operating Frequency
• Manufacturer: Linear Technology Corporation

LT3845
TYPICAL APPLICATIONS
20
60V TRANSIENTS
9V TO 16V
V
IN
C
C
D1: DIODES INC. B3100
L1: WURTH 7443551370
IN
OUT
R2
16.9k
: TDK C4532X7R2A225K
: MURATA GRM32ER60J107ME20
C
2.2μF
100V
×4
IN
R1
10k
9V-16V to 3.3V at 10A DC/DC Converter Capable of Withstanding 60V Transients,
R4
25k
SYNC
C2
6800pF
C
0.1μF
100V
IN2
49.9k
R5
100k
8200pF
R6
R3
1.1M
C3
All Ceramic Capacitors and Soft-Start Enabled
1
2
3
4
5
6
7
8
95
90
85
75
65
80
70
V
SHDN
C
BURST_EN
V
V
SYNC
f
SET
IN
SS
FB
C
0.1
Effi ciency and Power Loss
LT3845
SGND
17
SENSE
SENSE
BOOST
LOAD CURRENT (A)
V
PGND
V
IN
IN
V
SW
TG
BG
CC
= 14V
V
+
–
IN
= 9V
1
16
15
14
13
12
11
10
9
POWER LOSS
V
IN
R7
4.99k
V
D3
12V
= 14V
IN
= 16V
D2A BAV99
Q1
60V
C4
2.2μF
16V
3845 TA02b
10
3845 TA02
16V
1μF
D2B
BAV99
C5
6
4
0
5
3
2
1
M2
Si7370DP
M1
Si7370DP
D1
3.3μH
L1
R
0.006Ω
SENSE
C
100μF
6.3V
×5
OUT
V
3.3V
10A
OUT
3845fc