LTC3851 LINER [Linear Technology], LTC3851 Datasheet - Page 7

• Manufacturer Part Number: LTC3851
• Description: Synchronous Step-Down Switching Regulator Controller
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
900
800
600
500
400
200
700
300
–50
Oscillator Frequency vs
Temperature
–25
0
TEMPERATURE (°C)
R
R
R
3.0
2.5
2.0
1.5
1.0
0.5
40
35
30
25
20
15
10
FREQ
FREQ
FREQ
5
0
25
0
–50
Shutdown Input DC Supply
Current vs Input Voltage
0
Input DC Supply Current vs
Temperature
= 150k
= 36k
= 60k
50
–25
5
10
75
0
INPUT VOLTAGE (V)
TEMPERATURE (°C)
15
100
25
3851 G22
20
125
50
25
75
30
420
415
410
405
400
395
390
385
380
100
35
3851 G25
3851 G27
5
Oscillator Frequency vs Input
Voltage
R
FREQ
40
125
10
= 80k
15
INPUT VOLTAGE (V)
20
25
30
35
90
80
70
60
50
40
30
20
10
40
35
30
25
20
15
10
0
5
0
3851 G23
–50
3.2 3.4 3.6
Shutdown Input DC Supply
Current vs Temperature
Maximum Current Sense
Threshold vs INTV
40
–25
0
INTV
TEMPERATURE (°C)
3.8 4.0 4.2
I
I
SET
5
4
3
2
1
0
SET
I
CC
–50 –25
SET
25
Undervoltage Lockout Threshold
(INTV
VOLTAGE(V)
= INTV
= FLOAT
= GND
CC
50
CC
CC
Voltage
4.4 4.6 4.8
) vs Temperature
INTV
75
INTV
0
TEMPERATURE (°C)
CC
CC
100
RAMPING DOWN
25
38511 G28
RAMPING UP
3851 G26
LTC3851
125
50
5.0
75
100
3851 G24
7
3851f
125