MaxLinear XR79203 | Demoboard XR79203EVB

Description

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.

Features

3A step-down power module

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

More information

• Datasheet
• IC product information