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LTC3856 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC3856
Description  2-Phase Synchronous Step-Down DC/DC Controller with Diffamp
PDF  40 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3856 Datasheet(HTML) 6 Page - Linear Technology

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LTC3856

3856f
LOAD CURRENT (A)
0.1
40
50
60
70
80
1
10
100
30
20
10
0
90
100
3856 G03
VIN = 12V
VOUT = 1.5V
Burst Mode
OPERATION
FORCED
CONTINUOUS
MODE
Stage
Shedding
MODE
100µs/DIV
ILOAD
40A/DIV
IL1
20A/DIV
IL2
20A/DIV
VOUT
200mV/DIV
VIN = 12V
VOUT = 1.5V
ILOAD = 1A TO 40A
3856 G01
VBAT = 3.6V
ICPO = 200µA
CCPO = 2.2F
100µs/DIV
ILOAD
40A/DIV
IL1
20A/DIV
IL2
20A/DIV
VOUT
200mV/DIV
VIN = 12V
VOUT = 1.5V
ILOAD = 1A TO 40A
3856 G02
VBAT = 3.6V
ICPO = 200µA
CCPO = 2.2F
1µs/DIV
FORCED
CONTINUOUS
MODE, 5A/DIV
Burst Mode
OPERATION, 5A/DIV
DCM OPERATION,
5A/DIV
VIN = 12V
VOUT = 1.5V
ILOAD = 400mA
3856 G04
VBAT = 3.6V
ICPO = 200µA
CCPO = 2.2F
Typical perForMance characTerisTics
Efficiency vs Output Current
and Mode
Inductor Current at Light Load
Stage Shedding Transition,
1-Phase to 2-Phase
Stage Shedding Transition,
2-Phase to 1-Phase
Load Step:
Burst Mode Operation
Load Step:
Forced Continuous Mode
10µs/DIV
VOUT
100mV/DIV
VSW1
10V/DIV
VSW2
10V/DIV
3856 G05
VIN = 12V
VOUT = 1.5V
UNDERSHOOT
35mV
10µs/DIV
VOUT
100mV/DIV
VSW1
10V/DIV
VSW2
10V/DIV
3856 G06
VIN = 12V
VOUT = 1.5V
OVERSHOOT
36mV



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