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LTC3829 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC3829
Description  Dual, Fast, Accurate Step-Down DC/DC Controller
PDF  54 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3829 Datasheet(HTML) 6 Page - Linear Technology

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LTC3838
6
3838fa
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
10A/DIV
IL
10A/DIV
50μs/DIV
3838 G01
LOAD TRANSIENT = 0A TO 15A TO 0A
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND
VOUT
50mV/DIV
AC-COUPLED
ILOAD
10A/DIV
IL
10A/DIV
5μs/DIV
3838 G02
LOAD STEP = 0A TO 15A
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND
VOUT
50mV/DIV
AC-COUPLED
ILOAD
10A/DIV
IL
10A/DIV
5μs/DIV
3838 G03
LOAD RELEASE = 15A TO 0A
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND
VOUT
50mV/DIV
AC-COUPLED
ILOAD
10A/DIV
IL
10A/DIV
50μs/DIV
3838 G04
LOAD TRANSIENT = 500mA TO 15A TO 500mA
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND
VOUT
50mV/DIV
AC-COUPLED
ILOAD
10A/DIV
IL
10A/DIV
5μs/DIV
3838 G05
LOAD STEP = 500mA TO 15A
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND
VOUT
50mV/DIV
AC-COUPLED
ILOAD
10A/DIV
IL
10A/DIV
5μs/DIV
3838 G06
LOAD RELEASE = 15A TO 500mA
VIN = 12V
VOUT = 1.2V
FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND
VOUT
50mV/DIV
AC-COUPLED
SW
3V/DIV
VOUT
50mV/DIV
AC-COUPLED
ITH
1V/DIV
IL
10A/DIV
5μs/DIV
3838 G08
LOAD RELEASE = 15A TO 5A
VIN = 5V
VOUT = 0.6V
FIGURE 17 CIRCUIT, CHANNEL 1 MODIFIED:
RFB2 = 0Ω, VRNG2 = SGND, CITH1 = 120pF, CITH2 = 0pF,
RITH1/2 = 46.4k TO SGND//42.2k TO INTVCC,
CONNECTION FROM RITH1/2 AND CITH1 TO DTR1 PIN REMOVED.
DTR1 PIN TIED TO INTVCC
SW
3V/DIV
VOUT
50mV/DIV
AC-COUPLED
ITH
1V/DIV
IL
10A/DIV
5μs/DIV
3838 G07
LOAD RELEASE = 15A TO 5A
VIN = 5V
VOUT = 0.6V
FIGURE 17 CIRCUIT, CHANNEL 1 MODIFIED:
RFB2 = 0Ω, VRNG2 = SGND, CITH1 = 120pF, CITH2 = 0pF,
FROM DTR1 PIN: RITH1 = 46.4k TO SGND, RITH2 = 42.2k TO INTVCC



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