3433EFE 데이터 시트보기 (PDF) - Linear Technology
부품명
상세내역
일치하는 목록
3433EFE Datasheet PDF : 16 Pages
| |||
APPLICATIO S I FOR ATIO
Input Voltage Transient Suppression
Not only does a LT3433 converter operate across a large
range of DC input voltages, it also maintains tight output
regulation during significant input voltage transients. The
LT3433 automatic transitioning between buck and buck/
boost modes of operation provides seamless output regu-
lation over these input voltage transients. In an automotive
environment, input voltage transients are commonplace,
such as those experienced during a cold crank condition.
During the initiation of cold crank, the battery rail can be
pulled down to 4V in as little as 1ms. In a 4V-60V to 5V DC/
DC converter application (shown on the first page of this
data sheet) a cold crank transient condition, simulated
with a 1ms 13.8V to 4V input transition, yields regulation
maintained to 1% with a 125mA load.
LT3433
4V-50V to 5V Converter Input Transient Response
1ms 13.8V to 4V Input Transition
VIN
5V/DIV
VOUT
0.1V/DIV
1ms/DIV
3433 AI04
TYPICAL APPLICATIO S
VBATT
(SWITCHED)
VBATT
4V TO 60V
SHDN
4V-60V to 5V Converter with Switched Burst Enable and Shutdown
DS1
B160A
L1
100µH
COEV DU1352-101M
D2
1N4148
C5
R4
1µF
20k
10V
C4
2.2µF
100V
DZ1 C3 330pF
20V
C2
R3
1nF R1
100k
68k
R2
100k
1%
VBST
SW_L
SW_H PWRGND
LT3433
VIN
VOUT
BURST_EN VBIAS
VC
SHDN
VFB
SS
SGND
R5
309k
1%
DS2
B120A
VOUT
5V
+
C7
47µF
4V < VIN < 8.5V: 125mA
8.5V < VIN < 60V: 350mA
10V
90
80
Efficiency
VIN = 13.8V
D1
1N4148
C6
0.1µF 10V
C1
0.01µF
70
VIN = 13.8V
60
BURST
50
40
VIN = 4V
(BURST)
30
VIN = 4V
3433 TA03a
MODE SWITCH:
VIN H-L: 7.9V
VIN L-H: 8.3V
20
0.1
1
10
100
OUTPUT CURRENT (mA)
1000
3433 TA03b
3433f
13
Share Link: 