LTC3858 Linear Technology, LTC3858 Datasheet - Page 7

• Manufacturer Part Number: LTC3858
• Description: Synchronous Step-Down Controller
• Manufacturer: Linear Technology

Typical perForMance characTerisTics
–100
–150
–200
–250
–300
–350
–400
–450
–500
–550
–600
1.20
1.15
1.10
1.05
1.00
0.95
0.90
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
344
352
350
348
346
= 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
0
8
6
4
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
25
55
30
80
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
–45
Undervoltage Lockout Threshold
vs Temperature
105
35
3858 G20
3858 G23
–20
130
40
5
TEMPERATURE (°C)
30
796
800
700
600
500
400
300
200
100
808
806
804
802
800
798
794
792
0
–45
–45
Regulated Feedback Voltage
vs Temperature
Oscillator Frequency
vs Temperature
55
–20
–20
80
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5
5
105
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQ = INTV
3858 G25
FREQ = GND
30
30
130
LTC3858
55
55
CC
80
80
105
105
22554 G21
3858 G24
3858fa

130
130