LTC3856 LINER [Linear Technology], LTC3856 Datasheet - Page 7

• Manufacturer Part Number: LTC3856
• Description: 2-Phase Synchronous Step-Down DC/DC Controller with Diffamp
• Manufacturer: LINER [Linear Technology]

Typical perForMance characTerisTics
50mV/DIV
20A/DIV
5.25
4.75
4.50
4.25
V
5.00
4.00
3.75
3.50
3.25
3.00
100
OUT
50
90
80
70
60
40
30
20
10
0
I
L
0
0
INTV
Maximum Current Sense Voltage
vs Duty Cycle
Load Step without AVP
V
V
IN
OUT
10
= 12V
5
= 1.5V
CC
20
Line Regulation
10
25A
30
INPUT VOLTAGE (V)
DUTY CYCLE (%)
15
I
I
LIM
I
LIM
40
LIM
100µs/DIV
= INTV
= FLOAT
50A
20
= GND
50
60
25
CC
70
30
80
35
108mV
90
3856 G07
3856 G09
3856 G12
100
40
50mV/DIV
20A/DIV
V
100
–20
–40
OUT
90
80
70
60
50
40
30
20
10
80
60
40
20
I
0
0
L
Maximum Current Sense Voltage
vs Feedback Voltage
(Current Foldback)
0
0
Load Step with AVP
Current Sense Threshold
vs I
V
V
IN
OUT
= 12V
TH
= 1.5V
0.1
Voltage
0.5
25A
I
FEEDBACK VOLTAGE (V)
LIM
0.2
= FLOAT
100µs/DIV
V
ITH
50A
0.3
1
I
(V)
LIM
= INTV
0.4
I
LIM
I
I
I
LIM
LIM
LIM
1.5
= GND
CC
= INTV
= FLOAT
= GND
0.5
54mV
3856 G10
3856 G07a
CC
3856 G13
0.6
2
4.5
4.3
4.1
3.9
3.7
3.5
3.3
3.1
2.9
2.7
2.5
1.1
1.0
1.5
1.4
1.3
1.2
80
60
70
50
40
30
20
10
0
–50
5
Quiescent Current vs Input
Voltage without EXTV
0
TK/SS Pull-Up Current
vs Temperature
Maximum Current Sense Threshold
vs Common Mode Voltage
V
–25
10
SENSE
1
15
COMMON MODE VOLTAGE (V)
0
INPUT VOLTAGE (V)
TEMPERATURE (°C)
I
I
LIM
LIM
I
2
20
LIM
25
= INTV
= FLOAT
LTC3856
= GND
25
50
3
CC
CC
30
75
4
35
100
3856 G08
3856 G11
3856 G14

3856f
125
40
5