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LM2651 - 1.5A High Efficiency Synchronous Switching Regulator

Download the LM2651 datasheet PDF. This datasheet also covers the LM2 variant, as both devices belong to the same 1.5a high efficiency synchronous switching regulator family and are provided as variant models within a single manufacturer datasheet.

Description

The LM2651 switching regulator provides high efficiency power conversion over a 100:1 load range (1.5A to 15mA).

This feature makes the LM2651 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes.

Features

  • include input undervoltage lockout, current limiting, and thermal shutdown. Features n n n n n n n n n n n n Ultra high efficiency up to 97% High efficiency over a 1.5A to milliamperes load range 4V to 14V input voltage range 1.8V, 2.5V, 3.3V, or ADJ output voltage Internal MOSFET switch with low RDS(on) of 75mΩ 300kHz fixed frequency internal oscillator 7µA shutdown current Patented current sensing for current mode control Input undervoltage lockout Adjustable soft-start Current limit and ther.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM2-651.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
LM2651 1.5A High-Efficiency Synchronous Switching Regulator Texas Instruments
LM2650 Synchronous Step-Down DC/DC Converter Texas Instruments
LM2653 1.5A High Efficiency Synchronous Switching Regulator Texas Instruments
LM2657 Dual Synchronous Buck Regulator Controller Texas Instruments
LM26 Factory-Preset Thermostat Texas Instruments

Other Datasheets by National Semiconductor (Texas Instruments)

Part Number Description
LM2650 Synchronous Step-Down DC/DC Converter
LM2653 1.5A High Efficiency Synchronous Switching Regulator
LM2655 2.5A High Efficiency Synchronous Switching Regulator
LM2657 Dual Synchronous Buck Regulator Controller
LM26 Factory Preset Thermostat

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LM2651 1.5A High Efficiency Synchronous Switching Regulator February 2000 LM2651 1.5A High Efficiency Synchronous Switching Regulator General Description The LM2651 switching regulator provides high efficiency power conversion over a 100:1 load range (1.5A to 15mA). This feature makes the LM2651 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes. Synchronous rectification is used to achieve up to 97% efficiency. At light loads, the LM2651 enters a low power hysteretic or “sleep” mode to keep the efficiency high. In many applications, the efficiency still exceeds 80% at 15mA load. A shutdown pin is available to disable the LM2651 and reduce the supply current to less than 10µA.
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