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LM2635 Datasheet 5-bit Programmable Synchronous Buck Regulator Controller

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM2635 5-Bit Programmable Synchronous Buck Regulator Controller May 2000 LM2635 5-Bit Programmable Synchronous Buck Regulator.

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

Key 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.

More Datasheets from National Semiconductor (now Texas Instruments)

Part Number Description
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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
LM260 Voltage Comparators
LM26001 Switching Regulator

LM2635 Distributor