LTC3872 Linear Technology, LTC3872 Datasheet - Page 17

• Manufacturer Part Number: LTC3872
• Description: No RSENSE Current Mode Boost DC/DC Controller
• Manufacturer: Linear Technology

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TYPICAL APPLICATIONS
20V/DIV
RUN/SS
5V/DIV
5A/DIV
V
OUT
I
L
Soft-Start
40ms/DIV
2.2nF
63.4k
12.1k
1%
1%
V
IN
High Effi ciency 5V Input, 48V Output Boost Converter
C
D1: DIODES, INC. PDS760
L1: SUMIDA CDEP147
M1: VISHAY SILICONIX Si7850DP
OUT1
475k
1%
I
IPRG
GND
V
TH
: NIPPON CHEMI-CON NTS50X7R2A225KT
100
0.33μF
FB
90
3872 TA05b
80
70
60
50
40
30
20
1
LTC3872
RUN/SS
NGATE
SW
V
IN
1M
10
Effi ciency
LOAD (mA)
M1
AC COUPLED
100
L1
10μH
200mA/DIV
500mV/DIV
2A/DIV
I
D1
LOAD
V
OUT
3872 TA05d
I
L
C
2.2μF
OUT1
1000
×3
C
10μF
IN
V
5V
IN
C
68μF
OUT2
+
3872 TA05
Load Step
500μs/DIV
V
48V
0.5A
OUT
LTC3872
3872 TA05c
17
3872fa