ltc3851-1 Linear Technology Corporation, ltc3851-1 Datasheet - Page 7

• Manufacturer Part Number: ltc3851-1
• Description: Synchronous Step-down Switching Regulator Controller
• Manufacturer: Linear Technology Corporation

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