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| LTC3810-5 Datasheet, PDF (5/36 Pages) Linear Technology – 60V Current Mode Synchronous Switching Regulator Controller | |||
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TYPICAL PERFORMANCE CHARACTERISTICS
LTC3810-5
Load Transient Response
VOUT
100mV/DIV
IOUT
5A/DIV
VIN = 48V
50μs/DIV
0A TO 5A LOADSTEP
FRONT PAGE CIRCUIT
Start-Up
INTVCC
5V/DIV
VOUT
5V/DIV
VIN
50V/DIV
IL
5A/DIV
INTVCC
38105 G01
VIN = 48V
500μs/DIV
ILOAD = 1A
MODE/SYNC = 0V
FRONT PAGE CIRCUIT
Short-Circuit/
Fault Timeout Operation
VOUT
10V/DIV
SS/TRACK
4V/DIV
IL
5A/DIV
38105 G02
VIN = 48V
10ms/DIV
RSHORT = 0.1Ω
FRONT PAGE CIRCUIT
38105 G03
Short-Circuit/
Foldback Operation
VOUT
5V/DIV
VFB
0.5V/DIV
IL
5A/DIV
VIN = 48V
200μs/DIV
FRONT PAGE CIRCUIT
Tracking
Pulse Skip Mode Operation
VOUT
5V/DIV
SS/TRACK
0.5V/DIV
VFB
0.5V/DIV
IL
5A/DIV
38105 G04
VIN = 48V
500μs/DIV
ILOAD = 1A
MODE/SYNC = 0V
FRONT PAGE CIRCUIT
VOUT
SS/TRACK 100mV/DIV
VFB
ITH
0.5V/DIV
IL
2A/DIV
38105 G05
VIN = 48V
20μs/DIV
IOUT = 100mA
MODE/SYNC = INTVCC
FRONT PAGE CIRCUIT
38105 G06
Efï¬ciency vs Input Voltage
100
IOUT = 5A
90
IOUT = 0.5A
80
VOUT = 12V
Si7852 MOSFETs
70 f = 250kHz
10 20 30 40 50 60
INPUT VOLTAGE (V)
70 80
38105 G07
Efï¬ciency vs Load Current
100
95
VIN = 12V
VIN = 36V
VIN = 60V
90
85
80
75
70
01
VOUT = 5V
Si7850 MOSFETs
MODE/SYNC = INTVCC
f = 250kHz
234567
LOAD CURRENT (A)
38105 G08
Frequency vs Input Voltage
280
270
260
IOUT = 0A
250
IOUT = 5A
240
MODE/SYNC = 0V
230 FRONT PAGE CIRCUIT
10 20 30 40 50 60
INPUT VOLTAGE (V)
70 80
38105 G09
38105fc
5
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