Datasheet Linear Technology LTC3729

ManufacturerLinear Technology
SeriesLTC3729

550kHz, PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator

Datasheets

Datasheet LTC3729
PDF, 356 Kb, Language: en, File uploaded: Sep 23, 2017, Pages: 30
550kHz, PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator
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Prices

Packaging

LTC3729EG#PBFLTC3729EG#TRPBFLTC3729EUH#PBFLTC3729EUH#TRPBF
N1234
PackageSSOP-28
Package Outline Drawing
SSOP-28
Package Outline Drawing
5x5 QFN-32
Package Outline Drawing
5x5 QFN-32
Package Outline Drawing
Package CodeGGUHUH
Package Index05-08-1640 (G28)05-08-1640 (G28)05-08-169305-08-1693
Pin Count28283232

Parametrics

Parameters / ModelsLTC3729EG#PBFLTC3729EG#TRPBFLTC3729EUH#PBFLTC3729EUH#TRPBF
ArchitectureConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current Mode
Demo BoardsDC509BDC509BDC509BDC509B
Design ToolsLTspice ModelLTspice ModelLTspice ModelLTspice Model
Export Controlnononono
FeaturesPolyPhasePolyPhasePolyPhasePolyPhase
Frequency, kHz550550550550
Integrated Inductornononono
Ishutdown, µA20202020
Isupply, mA0.580.580.580.58
Max Phases2, 3, 4, 6, 8, 122, 3, 4, 6, 8, 122, 3, 4, 6, 8, 122, 3, 4, 6, 8, 12
Monolithicnononono
Number of Outputs1111
Operating Temperature Range, °C0 to 850 to 850 to 850 to 85
Output Current, A40404040
Polyphaseyesyesyesyes
Sense ResistorRsenseRsenseRsenseRsense
Switch Current, A40404040
Synchronousyesyesyesyes
TopologyBuckBuckBuckBuck
Vin Max, V36363636
Vin Min, V4444
Vout Max, V5555
Vout Maximum5V5V5V5V
Vout Min, V0.80.80.80.8
Vref Accuracy Over Temp, %1111

Eco Plan

LTC3729EG#PBFLTC3729EG#TRPBFLTC3729EUH#PBFLTC3729EUH#TRPBF
RoHSCompliantCompliantCompliantCompliant

Application Notes

  • PCB Layout Considerations for Non-Isolated Switching Power Supplies &mdash AN136
    PDF, 215 Kb, File published: Sep 20, 2012
    The best news when you power up a prototype supply board for the very first time is when it not only works, but also runs quiet and cool. Unfortunately, this does not always happen. A common problem of switching power supplies is “unstable” switching waveforms. Sometimes, waveform jittering is so pronounced that audible noise can be heard from the magnetic components. If the problem is related to the printed circuit board (PCB) layout, identifying the cause can be difficult. This is why proper PCB layout at the early stage of a switching supply design is very critical. Its importance cannot be overstated.
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Design Notes

  • Active Voltage Positioning Reduces Output Capacitors &mdash Design Solutions 10
    PDF, 130 Kb, File published: Nov 1, 1999
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Articles

  • Low Voltage, High Current DC/DC Power Supply with Load Sharing and Redundancy &mdash LT Journal
    PDF, 183 Kb, File published: Aug 9, 2004
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Model Line

Manufacturer's Classification

  • Power Management > Switching Regulator > Step-Down (Buck) Regulators > External Power Switch Buck Controllers
EMS supplier