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LTC3638 Datasheet(PDF) 21 Page - Linear Technology

Part # LTC3638
Description  High Efficiency, 140V 250mA Step-Down Regulator
PDF  26 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3638 Datasheet(HTML) 21 Page - Linear Technology

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LTC3638
21
3638fa
For more information www.linear.com/LTC3638
L1 CURRENT
500mA/DIV
VIN/VOUT
5V/DIV
L2 CURRENT
500mA/DIV
1s/DIV
3638 TA05b
VIN
VOUT
L1 CURRENT
500mA/DIV
VIN
50V/DIV
VOUT
10V/DIV
L2 CURRENT
500mA/DIV
200ms/DIV
3638 TA05c
TRANSIENT TO 140V
72V
Low Dropout Startup and
Shutdown
Overvoltage Lockout Operation
TYPICAL APPLICATIONS
3638 TA05a
VFB
ISET
SW
L1
47µH
VIN
RUN
CIN1
1µF
200V
CIN2
1µF
200V
COUT
47µF
16V
X5R
VOUT*
12V
500mA
VIN
4V TO 90V
UP TO 140V
TRANSIENT
SS
FBO
VPRG1
VPRG2
OVLO
LTC3638
(MASTER)
GND
VFB
ISET
SW
L2
47µH
VIN
RUN
SS
FBO
VPRG2
VPRG1
OVLO
LTC3638
(SLAVE)
GND
1M
13.7k
267k
196k
CIN1/CIN2: VISHAY VJ2225Y105KXCA
COUT: TAIYO YUDEN EMK325 BJ 476MM-T
L1/L2: WÜRTH 744 778 914 7
D1/D2: CENTRAL SEMI CMSH1-100M-LTN
*VOUT = VIN FOR VIN < 12V
D1
D2
4V to 90V Input to 12V/500mA Output Regulator with Overvoltage Lockout



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