Datasheet4U Logo Datasheet4U.com

LM2635 - 5-Bit Programmable Synchronous Buck Regulator Controller

Datasheet Summary

Description

The LM2635 is a high speed controller designed specifically for use in synchronous DC/DC buck converters for the Pentium™ II or Deschutes microprocessor.

A 5-bit DAC accepts the VID code directly from the CPU and adjusts the output voltage from 1.8V to 3.5V.

Features

  • as required by Intel VRM specifications. Current limiting is achieved by monitoring the voltage drop across the rDS_ON of the high side MOSFET, which eliminates an expensive current sense resistor. The LM2635 employs a fixed-frequency voltage mode PWM architecture. To provide a faster response to a large and fast load transient, two ultra-fast comparators are built in to monitor the output voltage and override the primary control loop when necessary. The PWM frequency is adjustable from 50 kHz t.

📥 Download Datasheet

Datasheet preview – LM2635

Datasheet Details

Part number LM2635
Manufacturer National Semiconductor
File Size 288.33 KB
Description 5-Bit Programmable Synchronous Buck Regulator Controller
Datasheet download datasheet LM2635 Datasheet
Additional preview pages of the LM2635 datasheet.

📁 Similar Datasheet

  • LM2633 - Advanced Two-Phase Synchronous Triple Regulator Controller (Texas Instruments)
  • LM2638 - Motherboard Power Supply Solution (Texas Instruments)
  • LM26 - Factory-Preset Thermostat (Texas Instruments)
  • LM26001 - 1.5-A Switching Regulator (Texas Instruments)
  • LM26001-Q1 - 1.5-A Switching Regulator (Texas Instruments)
  • LM26001B - 1.5A Switching Regulator (Texas Instruments)
  • LM26003 - 3-A Switching Regulator (Texas Instruments)
  • LM26003-Q1 - 3-A Switching Regulator (Texas Instruments)
  • LM2601 - Adapter Interface Circuit (Texas Instruments)
  • LM2601616A - 2.6 inch 16x16 Dot Matrix LED Display (LIGHTKEY)
Other Datasheets by National Semiconductor
  • LM2630 - Synchronous Step-Down Power Supply Controller
  • LM2631 - Synchronous Step-Down Power Supply Controller
  • LM2633 - Advanced Two-Phase Synchronous Triple Regulator Controller
  • LM2636 - 5-Bit Programmable Synchronous Buck Regulator Controller
  • LM2637 - Motherboard Power-Supply Solution
  • LM2638 - Motherboard Power-Supply Solution
  • LM2639 - High Frequency Multi-phase PWM Controller
  • LM26 - Factory Preset Thermostat

Full PDF Text Transcription

Click to expand full text
LM2635 5-Bit Programmable Synchronous Buck Regulator Controller May 2000 LM2635 5-Bit Programmable Synchronous Buck Regulator Controller General Description The LM2635 is a high speed controller designed specifically for use in synchronous DC/DC buck converters for the Pentium™ II or Deschutes microprocessor. A 5-bit DAC accepts the VID code directly from the CPU and adjusts the output voltage from 1.8V to 3.5V. It provides the power good, over-voltage protection, and output enable features as required by Intel VRM specifications. Current limiting is achieved by monitoring the voltage drop across the rDS_ON of the high side MOSFET, which eliminates an expensive current sense resistor. The LM2635 employs a fixed-frequency voltage mode PWM architecture.
Published: |