LTC3868 Linear Technology, LTC3868 Datasheet - Page 7

• Manufacturer Part Number: LTC3868
• Description: Low IQ Dual 2-Phase 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
vs Temperature
–20
–20
–
Pin Input Current
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
80
80
10
105
105
INPUT VOLTAGE (V)
3868 G19
3868 G22
15
130
130
20
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 Current
vs Input Voltage
25
3868 G28
–20
28
10
5
TEMPERATURE (°C)
INPUT VOLTAGE (V)
30
15
55
20
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
25
3868 G20
3868 G23
–20
130
28
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
TEMPERATURE (°C)
105
TEMPERATURE (°C)
FREQ = INTV
3868 G25
FREQ = GND
30
30
130
LTC3868
55
55
CC
80
80
105
105
3868 G21
3868 G24
3868fb

130
130