Demoboard XR79120EVB

22V, 20A Synchronous Step Down COT Power Module

Topologie: Other
Schaltfrequenz (min.): 400.00 kHz
Schaltfrequenz (max.): 600.00 kHz

Erstveröffentlichung am 30.01.2015, Version 1.1 vom


Power Module for point-of load supplies. A wide 4.5V to 22V input voltage range allows for single supply operation from industry standard 5V, 12V, and 19.6V rails.With a proprietary emulated current mode Constant On-Time (COT) control scheme, the XR79120 provides extremely fast line and load transient response using ceramic output capacitors. It requires no loop compensation hence simplifying circuit implementation and reducing overall component count. The control loop also provides 0.12% load and 0.17% line regulation and maintains constant operating frequency. A selectable power saving mode allows the user to operate in discontinuous mode (DCM) at light current loads thereby significantly increasing the converter efficiency. With a 93% peak efficiency and 84% for loads as low as 100mA, the XR79120 is suitable for applications where low power losses are important.A host of protection features, including over-current, over-temperature, short-circuit and UVLO, help achieve safe operation under abnormal operating conditions.The XR79120 is available in a RoHS compliant, green/halogen free space-saving 74-pin 12x14x4mm QFN package. With integrated controller, drivers, bootstrap diode and capacitor, MOSFETs, inductor, CIN and COUT, this solution allows the smallest possible 20A POL design.


  • MOSFETs, Inductor, CIN and COUT integrated in one package
  • 20A Step Down Module
  • Wide 4.5V to 22V Input Voltage Range
  • ≥0.6V Adjustable Output Voltage
  • Proprietary Constant On-Time Control
  • No Loop Compensation Required
  • Ceramic Output Cap. Stable operation
  • Programmable 200ns-2μs On-Time
  • Constant 400kHz-600kHz freq.
  • Selectable CCM or CCM/DCM Operation
  • 74-pin 12x14x4mm QFN package


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