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LTC3857IUHPBF Datasheet(PDF) 7 Page - Linear Technology

Part # LTC3857IUHPBF
Description  Low IQ, Dual, 2-Phase Synchronous Step-Down Controller
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3857IUHPBF Datasheet(HTML) 7 Page - Linear Technology

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LTC3857

3857fa
Typical perForMance characTerisTics
TRACK/SS Pull-Up Current
vs Temperature
Shutdown (RUN) Threshold
vs Temperature
Regulated Feedback Voltage
vs Temperature
SENSE– Pin Input Current
vs Temperature
Shutdown Current
vs Input Voltage
Oscillator Frequency
vs Temperature
Undervoltage Lockout Threshold
vs Temperature
Oscillator Frequency
vs Input Voltage
Shutdown Current vs Temperature
TEMPERATURE (°C)
–45
0.90
0.95
1.00
1.05
1.10
–20
5
30
55
3857 G19
80
105 130
TEMPERATURE (°C)
–45
1.30
1.35
1.40
30
80
3857 G20
1.25
1.20
–20
5
55
105
130
1.15
1.10
RUN RISING
RUN FALLING
TEMPERATURE (°C)
–45
806
30
3857 G21
800
796
–20
5
55
794
792
800
804
802
798
80
105 130
TEMPERATURE (°C)
–45
–600
–500
–550
–400
–450
–300
–350
50
–50
–20
30
55
130
3857 G22
0
–150
–100
–200
–250
5
80
105
VOUT < INTVCC – 0.5V
VOUT > INTVCC – 0.5V
INPUT VOLTAGE (V)
5
20
25
30
20
30
3857 G23
15
10
10
15
25
35
40
5
0
TEMPERATURE (°C)
–45
500
550
600
30
80
3857 G24
450
400
–20
5
55
105
130
350
300
FREQ = GND
FREQ = INTVCC
TEMPERATURE (°C)
–45
3.4
3.5
3.7
3.8
3.9
4.4
4.1
5
55
80
3857 G25
3.6
4.2
4.3
4.0
–20
30
105 130
INPUT VOLTAGE (V)
5
352
354
356
20
30
3857 G26
350
348
10
15
25
35
40
346
344
FREQ = GND
TEMPERATURE (°C)
–45
18
30
3857 G27
12
8
–20
5
55
6
4
20
16
14
10
80
105 130


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