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RT8870A - Dual-Output PWM Controller

Datasheet Summary

Description

The RT8870A is a dual-output PWM controller for AMD SVI mobile CPU power supply.

The RT8870A provides a two-phase PWM controller to power the CPU Core (VDD) and a single-phase PWM controller to power the Northbridge portion of the CPU (VDDNB).

Features

  • CCRCOT (Constant Current Ripple Constant On-Time) control with G-NAVPTM (Green-Native AVP), which is a Richtek proprietary topology. The CCRCOT control provides superior output voltage ripple performance over the entire input/output range. G-NAVPTM makes this device an easy setting controller to meet the droop requirement for all AMD mobile CPUs. The droop is easily programmed by setting the DC gain of the error amplifier. With proper compensation, the load transient response can achieve optimiz.

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Datasheet Details

Part number RT8870A
Manufacturer Richtek
File Size 293.08 KB
Description Dual-Output PWM Controller
Datasheet download datasheet RT8870A Datasheet
Additional preview pages of the RT8870A datasheet.

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Full PDF Text Transcription

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Preliminary RT8870A Dual-Output PWM Controller for AMD SVI Mobile CPU Power Supply General Description The RT8870A is a dual-output PWM controller for AMD SVI mobile CPU power supply. The RT8870A provides a two-phase PWM controller to power the CPU Core (VDD) and a single-phase PWM controller to power the Northbridge portion of the CPU (VDDNB). This part has three integrated MOSFET drivers and is fully compliant with AMD Voltage Regulator Specification to meet AMD’s mobile CPU power supply requirements. The RT8870A features CCRCOT (Constant Current Ripple Constant On-Time) control with G-NAVPTM (Green-Native AVP), which is a Richtek proprietary topology. The CCRCOT control provides superior output voltage ripple performance over the entire input/output range.
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