Datasheet Linear Technology LTC3729 — Datenblatt

HerstellerLinear Technology
SerieLTC3729

550 kHz, PolyPhase, hocheffizienter, synchroner Abwärtsschaltregler

Datenblätter

Datasheet LTC3729
PDF, 356 Kb, Sprache: en, Datei hochgeladen: Sep 23, 2017, Seiten: 30
550kHz, PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator
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Preise

Verpackung

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

Parameter

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

Öko-Plan

LTC3729EG#PBFLTC3729EG#TRPBFLTC3729EUH#PBFLTC3729EUH#TRPBF
RoHSCompliantCompliantCompliantCompliant

Anwendungshinweise

  • PCB Layout Considerations for Non-Isolated Switching Power Supplies &mdash AN136
    PDF, 215 Kb, Datei veröffentlicht: 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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Konstruktionshinweise

  • Active Voltage Positioning Reduces Output Capacitors &mdash Design Solutions 10
    PDF, 130 Kb, Datei veröffentlicht: Nov 1, 1999
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Artikel

  • Low Voltage, High Current DC/DC Power Supply with Load Sharing and Redundancy &mdash LT Journal
    PDF, 183 Kb, Datei veröffentlicht: Aug 9, 2004
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Modellreihe

Herstellerklassifikation

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