MaxLinear XR76120

Description

The XR76116 and XR76120 are synchronous step-down regulatorscombining the controller, drivers, bootstrap diode and MOSFETsin a single package for point-of-load supplies. The XR76116 has aload current rating of 15A and the XR76120 has a load current ratingof 20A. A wide 5V to 22V input voltage range allows for single supplyoperation from industry standard 5V, 12V and 19.6V rails.With a proprietary emulated current mode constant on-time (COT)control scheme, the XR76116/20 provide extremely fast line andload transient response using ceramic output capacitors. Theyrequire no loop compensation, simplifying circuit implementationand reducing overall component count. The control loop alsoprovides 0.1% load and 0.1% line regulation and maintains constantoperating frequency. A selectable power saving mode, allows the userto operate in discontinuous mode (DCM) at light current loads therebysignificantly increasing the converter efficiency.A host of protection features, including overcurrent, over temperature,overvoltage, short-circuit, open feedback detect and UVLO, helpsachieve safe operation under abnormal operating conditions.The XR76116/20 are available in a RoHS-compliant, green/halogenfreespace-saving 5mm x 6mm QFN package.

Features

XR76116/20 REF. SAME DATA SHEET

• 15A and 20A step-down regulators

• 4.5V to 5.5V low VIN operation

• 5V to 22V wide single input voltage

• 3V to 22V operation with external5V bias

• ≥0.6V adjustable output voltage

• Proprietary constant on-time control

• No loop compensation required

• Ceramic output capacitor stableoperation

• Programmable 70ns-1μs on-time

• Constant 200kHz-1MHz frequency

• Selectable CCM or CCM/DCMoperation

• Power-good flag with low impedance whenpower removed

• Precision enable

• Programmable soft-start

• 5mm x 6mm QFN package

Typical applications

• Base stations, switches/routers
• Point-of-load converters
• Distributed power architecture
• FPGA, DSP and processor supplies
• Servers

More information

• IC product information