描述 Description

The uP1989 is a dual, high voltage MOSFET driver optimizedfor driving two N-channel MOSFETs in a synchronousrectifiedbuck converter. Each driver is capable of driving a5000pF capacitive load with 30ns transition time. Thisdevice combined with uPI multi-phase buck PWM controllerforms a complete core voltage regulator for advanced microprocessors.The uP1989 features anti-shoot-through protection thatprevents cross-conduction of the external MOSFET whilemaintains minimum deadtime for optimized efficiency.

This part has integrated bootstrap switch to help minimizethe external component count. Both gate drives are turnedoff by pulling low EN pin or high-impedance at PWM pin,preventing rapid output capacitor discharge during systemshutdown.

This device also supports supply input under voltagelockout. The uP1989 is available in a thermally enhancedVQFN4x4-24L package.

特性 Features

·All-In-One Synchronous Buck Drivers
·Integrated Bootstrap Switch
·Integrated Gate-to-Source Discharge Resistors
·Anti-Shoot-Through Protection Circuitry
·Tri-State Input for Bridge Shutdown
·Output Disable Control Turns Off both MOSFETs
·Under Voltage Lockout for Supply Input
·High-Side MOSFET Short Power on Protection
·Allow PWM Pin as Multi-Function Setting Application
·VQFN4x4-24L Package
·RoHS Compliant and Halogen Free

應(yīng)用 Application

·Desktop CPU Core Voltage Regulators
·High Frequency Low Profile DC/DC Converter
·High Current Low Voltage DC/DC Converter