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uP1961S

Dual-Phase MOSFET Drivers for DCR current sensing with Phase Extension

Datasheets PDF

General Description

The uP1961S is a high performance gate driver IC with Phase Extension Module (PEM). The PEM interleaves the single PWM input and drives dual-phase synchronous buck power stages. The PEM also extracts and passes the dual-phase current signals to the controller. When operating with uPI’s VR controllers with DCR current balance scheme, the uP1961S can double the phase number with perfect phase interleaving and channel current balancing.Each driver is capable of driving a 5000pF load with 30ns transition time. This device combined with uPI multiphase buck PWM controller forms a complete core voltage regulator for advanced microprocessors.The uP1961S features adaptive anti-shoot-through protection that prevents cross-conduction of the external MOSFET while maintains minimum deadtime for optimized efficiency.

All gate drivers are turned off by pulling low EN pin or high-impedance at PWM0 pin, preventing rapid output capacitor discharge during system shutdowns. Another feature is supply input under voltage lockout. The uP1961S is available in thermal enhanced WQFN3x3 – 16L package.

Pin Configuration & Typical Application Circuit

Feature

  • Quad MOSFET Drivers for Dual-Phase Buck Converter with Single PWM Input.
  • One PWM Signal Generates Both Drivers.
  • Alternatively Pass DCR Current Signals of Both Phase to Controller for Current Balance.
  • Enble/Disable Control for PEM Function.
  • Tri-State PWM Input for Bridge Shutdown.
  • Output Disable Control for Bridge Shutdown.
  • Bootstrapped High-Side Drivers.
  • Adaptive Anti-Shoot-Through Protection Circuit.
  • Supply Input Under Voltage Lockout.
  • Low Power Dissipation.
  • WQFN3x3-16L Package.
  • RoHS Compliant and Halogen Free.

Application

  • Core Voltage Supplies for Intel and AMD Mobile Microprocessors.
  • High Frequency Low Profile DC/DC Converters.
  • High Current Low Output Voltage DC/DC Converters.
  • High Input Voltage DC/DC Converters.
  • All-in-one Synchronous Buck Drivers.