LTC3858-1 Linear Technology Corporation, LTC3858-1 Datasheet - Page 7

• Manufacturer Part Number: LTC3858-1
• Description: Dual 2-Phase Synchronous Step-Down Controller
• Manufacturer: Linear Technology Corporation

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TYPICAL PERFORMANCE CHARACTERISTICS
–100
–150
–200
–250
–300
–350
–400
–450
–500
–550
–600
0.90
1.20
1.15
1.10
1.05
1.00
0.95
0.85
0.80
–50
50
0
–45
–45
Soft-Start Pull-Up Current
vs Temperature
SENSE– Pin Input Current
vs Temperature
–20
–20
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
V
V
OUT
30
OUT
30
356
354
352
350
348
346
344
= 3.3V
= 28V
5
Oscillator Frequency
vs Input Voltage
55
55
FREQ = GND
10
80
80
15
105
105
INPUT VOLTAGE (V)
3858 G19
3858 G22
20
130
130
25
30
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
14
12
10
8
6
4
0
2
–45
5
Shutdown (RUN) Threshold
vs Temperature
Shutdown Input Current
vs Input Voltage
35
3858 G28
–20
10
40
15
5
TEMPERATURE (°C)
INPUT VOLTAGE (V)
30
20
55
25
30
80
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
105
35
–45
Undervoltage Lockout Threshold
vs Temperature
3858 G20
3858 G23
130
40
–20
5
TEMPERATURE (°C)
808
806
804
802
800
798
796
794
792
800
700
600
500
400
300
200
100
30
0
–45
–45
Regulated Feedback Voltage
vs Temperature
Oscillator Frequency
vs Temperature
55
–20
–20
80
5
5
TEMPERATURE (°C)
TEMPERATURE (°C)
LTC3858-1
FREQ = INTV
105
FREQ = GND
30
30
3858 G25
130
55
55
CC
80
80
105
105
22554 G21
3858 G24
38581f
7
130
130