描述 Description

The uP1642P is a 3/2/1-phase synchronous-rectified buckcontroller specifically designed to work with 4.5V ~ 26Vinput voltage and deliver high quality output voltage for highperformancegraphic processor power.

The uP1642P adopts proprietary RCOTTM technology,providing flexible selection of output LC filter and excellenttransient response to load and line change.

The uP1642P supports NVIDIA Open Voltage Regulator-2and 2+1 with PWMVID feature. The PWMVID input isbuffered and filtered to generate accurate reference voltage,and the output voltage is precisely regulated to the referenceinput.

The uP1642P integrates two bootstrapped MOSFET gatedrivers and one PWM output achieving optimal balancebetween cost and flexibility. The uP1642P uses MOSFETRDS(ON) current sensing for channel current balance.

Other features include accurate and reliable short-circuitprotection, adjustable on-time setting, power saving controlinput, and a delayed power good output. This part isavailable in VQFN4x4 - 24L package.

特性 Features

·Support NVIDIA’s Open VReg Type-2 and 2+1 PWMVID Technology.
·Wide Input Voltage Range 4.5V ~ 26V.
·Robust Constant On-Time Control.
·3/2/1 Phase Operation.
·Two Integrated MOSFET Drivers with Shoot-Through Protection and Internal Bootstrap Switch.
·Adjustable Current Balancing by RDS(ON) Current Sensing.
·Adjustable Operation Frequency from 200kHz to 1MHz.
·External Compensation.
·Support NVIDIA’s PWMVID Function.
·Dynamic Output Voltage Adjustment.
·Temperature Sensing and Thermal Alert.
·Power Good Indication.
·Over Voltage Protection.
·Under Voltage Protection.
·Short Circuit Protection.
·Over Temperature Protection.
·RoHS Compliant and Halogen Free

應用 Application

·Middle-High End GPU Core Power.
·High End Desktop PC Memory Core Power.
·Low Output Voltage, High Power Density DC-DC Converters.
·Voltage Regulator Modules.