LTC3630_15 Datasheet, PDF (22/26 Pages) Linear Technology – High Efficiency, 65V 500mA Synchronous Step-Down Converter

LTC3630
Typical Applications
5V to 65V Input to 5V Output,150mA Regulator
with 20kHz Minimum Burst Frequency
V_IN
5V TO 65V
C_IN
2.2µF
R_ISET
60.4k
V_IN
SW
LTC3630
RUN V_FB
I_SET
SS
V_PRG2 V_PRG1
FBO
GND
L1
33µH
C_OUT
10µF
30.1Ω
IN
OUT
LTC6994-1
V⁺
976k
C_IN: TDK C3225X7R2A225M
C_OUT: AVX 12063D106KAT
L1: COOPER BUSSMAN SD25-330
SET DIV
196k
GND
100k
3630 TA04
V_OUT
5V
150mA
Burst Frequency vs Load Current
60
V_IN = 12V
50
40
30
20kHz LIMIT
20
10
0
0
NO LIMIT
1
10
LOAD CURRENT (mA)
100
3630 TA04b
12V to 65V Input to 12V Output with 100mA Input Current Limit
V_IN
12V TO 65V
C_IN
2.2µF
R3
806k
R4
10k
V_IN
SW
LTC3630
RUN V_FB
I_SET
SS
FBO V_PRG1
V_PRG2
GND
L1
22µH
R1
200k
R2
14.3k
3630 TA05
V_OUT
C_OUT ^12V
22µF
C_IN: TDK C3225X7R2A225M
C_OUT: TAIYO YUDEN EMK316BJ226ML-T
L1:TDK SLF7045470MR75
Maximum Input and Load Current vs Input Voltage
500
400 MAXIMUM LOAD CURRENT
300
200
MAXIMUM INPUT CURRENT
100
0
10 15 20 25 30 35 40 45 50 55 60 65
INPUT VOLTAGE (V)
3630 TA05b
INPUT
CURRENT LIMIT
≈
V_OUT
2
• ^R4
R3 + R4
MAXIMUM LOAD
CURRENT
≈
V_IN
2
• ^R4
R3 + R4
22
For more information www.linear.com/LTC3630
3630fd