ltc3810 Linear Technology Corporation, ltc3810 Datasheet - Page 5

• Manufacturer Part Number: ltc3810
• Description: 100v Current Mode Synchronous Switching Regulator Controller
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
100mV/
5V/DIV
5A/DIV
5A/DIV
0.5V/
V
V
I
OUT
DIV
100
OUT
DIV
OUT
V
90
80
70
FB
I
L
10
FRONT PAGE CIRCUIT
V
Effi ciency vs Input Voltage
Load Transient Response
FRONT PAGE CIRCUIT
V
0A TO 5A LOAD STEP
Short-Circuit/
Foldback Operation
IN
IN
FRONT PAGE CIRCUIT
f = 250kHz
= 48V
= 48V
20
30
INPUT VOLTAGE (V)
I
I
OUT
OUT
40
200μs/DIV
50μs/DIV
= 5A
= 0.5A
50
60
70
3810 G07
3810 G04
3810 G01
80
SS/TRACK
0.5V/DIV
0.5V/DIV
50V/DIV
INTV
5V/DIV
5V/DIV
5A/DIV
5V/DIV
5A/DIV
V
V
100
OUT
OUT
V
V
95
90
85
80
75
70
CC
IN
FB
I
I
L
L
Start-Up
FRONT PAGE CIRCUIT
V
I
MODE/SYNC = 0V
Tracking
FRONT PAGE CIRCUIT
V
I
MODE/SYNC = 0V
0
Effi ciency vs Load Current
LOAD
LOAD
IN
IN
= 48V
= 48V
V
1
= 1A
= 1A
IN
= 12V
2
LOAD CURRENT (A)
3
V
500μs/DIV
500μs/DIV
IN
= 36V
V
Si7850 MOSFETs
MODE/SYNC = INTV
f = 250kHz
OUT
INTV
4
= 5V
CC
V
5
IN
= 60V
SS/TRACK
6
3810 G08
V
CC
FB
3810 G02
3810 G05
7
SS/TRACK
0.5V/DIV
10V/DIV
100mV/
2A/DIV
4V/DIV
5A/DIV
V
V
260
230
280
270
250
240
OUT
DIV
OUT
I
TH
I
I
L
L
10
Short Circuit/
Fault Timeout Operation
Frequency vs Input Voltage
FRONT PAGE CIRCUIT
V
R
Pulse Skip Mode Operation
FRONT PAGE CIRCUIT
V
I
MODE/SYNC = INTV
OUT
FRONT PAGE CIRCUIT
MODE/SYNC = 0V
IN
SHORT
IN
= 48V
= 48V
= 100mA
20
= 0.1Ω
30
INPUT VOLTAGE (V)
I
I
OUT
OUT
40
20μs/DIV
LTC3810
CC
10ms/DIV
= 0A
= 5A
50
60
70
3810fa
3810 G09
5
3810 G06
3810 G03
80