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| LTC3637_15 Datasheet, PDF (22/26 Pages) Linear Technology – 76V, 1A Step-Down Regulator | |||
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LTC3637
TYPICAL APPLICATIONS
4V to 76V Input to 15V Output* Clamp, 1A High Efficiency Surge Stopper
VIN*
4V TO 76V
VIN
SW
LTC3637
RUN
VFB
FB0
SS
ISET VPRG1
OVLO VPRG2
GND
L1
6.8µH
D1
R1
200k
R2
27.4k
VOUT*
COUT 1A
22µF
COUT: TDK C3225X7R1C226M
D1: VISHAY 10MQ100NPBF
L1: VISAHY IHLP-2525CZ-01
3637 TA05a
*WHEN VIN > 15V, LTC3637 SWITCHES AND VOUT IS REGULATED TO 15V;
WHEN VIN ⤠15V, LTC3637 OPERATES IN DROPOUT AND VOUT FOLLOWS VIN
4V to 76V Input to 1.8V SuperCap Charger
D2
VIN
4V TO 76V
VIN
SW
LTC3637
L1
6.2µH
D1
RUN
VFB
FBO
SS
ISET VPRG1
OVLO VPRG2
GND
3637 TA06
COUT
100µF
Ã2
VOUT
CSC 1.8V
1F
VIN
20V/DIV
76V INPUT SURGE
VOUT
20V/DIV
15V OUTPUT CLAMP
ILOAD = 1A
100ms/DIV
RUN
2V/DIV
VOUT
500mV/DIV
INDUCTOR
CURRENT
2A/DIV
ZOOM
RUN
2V/DIV
100ms/DIV
COUT: TDK C3225X5R0J107M
CSC: COOPER BUSSMANN M0810-2R5105-R
D1: VISHAY VSSA310S-E3
D2: VISHAY 10MDQ100NPBF
L1: WÃRTH 744 066 0062
VOUT
500mV/DIV
INDUCTOR
CURRENT
2A/DIV
200µs/DIV
3637 TA05b
VIN = 48V
3637 TA05b
VIN = 48V
3637 TA05c
3637fa
22
For more information www.linear.com/LTC3637
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