Microchip MCP19035

Description

The MCP19035 is an application-optimized, highspeed synchronous buck controller that operates from input voltage sources up to 30V. This controller implements a voltage-mode control architecture with afixed switching frequency of 300 kHz. The highswitching frequency facilitates the use of smaller passive components, including the inductor and input/output capacitors, allowing a compact, highperformancepower supply solution. The MCP19035 implements an adaptive anti-cross conduction scheme to prevent shoot-through in the external powerMOSFETs. Further more, the MCP19035 offers multiple dead-time options, enabling an additional degree of optimization, allowing a higher efficiencypower supply design.

The MCP19035 controller is intended to be used for applications providing up to 20A of output currents across a wide input voltage range, up to 30V.

The SHDN input is used to turn the device on and off. While turned off, the current consumption is minimized.

The MCP19035 offers a Power Good feature (PWRGD), enabling fault detection and simplifying sequencing.

Features

• Input Voltage Range: from 4.5V to 30V
• Targeted for Low Voltage Power Trains with Output Current up to 20A
• High-Speed Voltage Mode, Analog Pulse-Width Modulation Control
• Power Good Output
• Internal Oscillator, Reference Voltage and
• Overcurrent Limit threshold for Stand-Alone Applications.
• Fixed Switching Frequency (fSW): -300 kHz
• 600kHz
• Integrated Synchronous MOSFET Drivers
• Multiple Dead-Time Options
• Internal Blocking Device for Bootstrap Circuit
• Integrated Current Sense Capability for Short Circuit Protection
• Internal Overtemperature Protection
• Under Voltage Lockout (UVLO)
• Integrated Linear Voltage Regulator
• 10-LD 3 x 3 mm DFN Package

Typical applications

• Set-Top Boxes
• Point of Loads
• PC's Graphic/Audio Cards
• DSL Cable Modems
• FPGA's/DSP's Power Supply

More information

• Datasheet
• IC product information