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LTC3869 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3869
Description  Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3869 Datasheet(HTML) 5 Page - Linear Technology

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LTC3839
5
3839fa
TYPICAL PERFORMANCE CHARACTERISTICS
Transient Response
(Discontinuous Mode)
Load Release with Detect Transient (DTR)
Feature Enabled
Load Release with Detect Transient (DTR)
Feature Disabled
Load Step
(Discontinuous Mode)
Load Release
(Discontinuous Mode)
Transient Response
(Forced Continuous Mode)
Load Step
(Forced Continuous Mode)
Load Release
(Forced Continuous Mode)
ILOAD
20A/DIV
IL1
10A/DIV
IL2
10A/DIV
50μs/DIV
3839 G01
LOAD TRANSIENT = 0A TO 30A
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT
VOUT
50mV/DIV
ILOAD
20A/DIV
IL1
10A/DIV
IL2
10A/DIV
5μs/DIV
3839 G02
LOAD STEP = 0A TO 30A
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT
VOUT
50mV/DIV
ILOAD
20A/DIV
IL1
10A/DIV
IL2
10A/DIV
50μs/DIV
3839 G04
LOAD TRANSIENT = 750mA TO 30A
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT
VOUT
50mV/DIV
ILOAD
20A/DIV
IL1
10A/DIV
IL2
10A/DIV
5μs/DIV
3839 G05
LOAD STEP = 750mA TO 30A
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT
VOUT
50mV/DIV
SW1
5V/DIV
SW2
5V/DIV
ILOAD
20A/DIV
VOUT
20mV/DIV
AC-COUPLED
2μs/DIV
3839 G07
BACK PAGE APPLICATION CIRCUIT
LOAD RELEASE = 30A TO 10A
VIN = 5V
VOUT = 0.6V
SHADING OBTAINED WITH INFINITE PERSISTENCE ON
OSCILLOSCOPE WAVEFORMS
ILOAD
20A/DIV
IL2
10A/DIV
IL1
10A/DIV
5μs/DIV
3839 G03
LOAD RELEASE = 30A TO 0A
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT
VOUT
50mV/DIV
ILOAD
20A/DIV
IL1
10A/DIV
IL2
10A/DIV
5μs/DIV
3839 G06
LOAD RELEASE = 30A TO 750mA
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT
VOUT
50mV/DIV
SW1
5V/DIV
SW2
5V/DIV
ILOAD
20A/DIV
VOUT
20mV/DIV
AC-COUPLED
2μs/DIV
3839 G08
BACK PAGE APPLICATION CIRCUIT,
MODIFIED: RITH = 16.5k (≈36.5k/30.1k)
LOAD RELEASE = 30A TO 10A
VIN = 5V
VOUT = 0.6V


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