Demoboard XR79203EVB

40V, 3A Synchronous Step-Down COT Power Module

Topologie: Buck
Eingangsspannung (min.): 24.00 V
Eingangsspannung (max.): 24.00 V
Schaltfrequenz (min.): 400.00 kHz
Schaltfrequenz (max.): 800.00 kHz
Ausgang 1: 3.30 V / 3.000 A

Erstveröffentlichung am 30.04.2016, Version 1A vom


The XR79203 is part of a family of 40Vsynchronous step-down power modulescombining the controller, drivers, inductor,passive components and MOSFETs in a singlepackage for point-of-load supplies. Thismodule requires very few external componentsleading to ease of design and fast time tomarket. The XR79203 has load current ratingof 3A. A wide 5V to 40V input voltage rangeallows for single supply operation fromindustry standard 24V ±10%, 18V to 36V andrectified 18VAC and 24VAC rails. With aproprietary emulated current mode ConstantOn-Time (COT) control scheme, the XR79203provides extremely fast line and load transientresponse using ceramic output capacitors. Itrequires no loop compensation, simplifyingcircuit implementation and reducing overallcomponent count. The control loop alsoprovides 0.1% load and 0.2% line regulationand maintains constant operating frequency. Aselectable power saving mode, allows the userto operate in Discontinuous Current Mode(DCM) at light current loads significantlyincreasing the converter efficiency. A host ofprotection features, including overcurrent,over temperature, short-circuit and UVLO,helps achieve safe operation under abnormaloperating conditions. The XR79203 is availablein a RoHS-compliant, green/halogen-freespace-saving 8mm x 8mm x 4mm QFNpackage.


  • 3A step-down power moduleo 5V to 40V wide single input voltageo ≥0.6V adjustable output voltage• Controller, drivers, inductor, passive components and MOSFETs integrated in one package• Proprietary constant on-time controlo No loop compensation requiredo Stable with ceramic output capacitorso Programmable 100ns to 1μs on-timeo Constant 400kHz to 800kHz frequencyo Selectable CCM or DCM/CCM operation• Precision enable and power-good flag• Programmable soft-start• 8mm x 8mm x 4mm QFN package


  Artikel Nr. SPEC Produktserie Fig. P
Typ Gender Blade Design Pins Reihen IR 1
Verpackung Muster
7471287 PDF WA-MTAB Mounting Tabs 2 5.08 Vertikal Männlich 6.35 mm
61300311121 PDF WR-PHD 2.54 mm THT Pin Header Gerade Pin Header 3 Single 3 Beutel
61300111121 PDF WR-PHD 2.54 mm THT Pin Header Gerade Pin Header 1 Single 3 Beutel