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LM21305 - 5A Adjustable Frequency Synchronous Buck Regulator

General Description

The LM21305 is a full featured adjustable frequency synchronous buck regulator capable of delivering up to 5A of continuous output current.

The device is optimized to work over the input voltage range of 3V to 18V making it suitable for wide variety of applications.

Key Features

  • internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by an internal Soft-Start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit. The frequency of this device can be adjusted from 300 kHz to 1.5 MHz through an external resistor. The LM.

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LM21305 5A Adjustable Frequency Synchronous Buck Regulator LM21305 PRELIMINARY June 8, 2010 5A Adjustable Frequency Synchronous Buck Regulator General Description The LM21305 is a full featured adjustable frequency synchronous buck regulator capable of delivering up to 5A of continuous output current. The device is optimized to work over the input voltage range of 3V to 18V making it suitable for wide variety of applications. The LM21305 provides 1% output-voltage accuracy and excellent line and fast load transient response for digital loads. The device offers flexible system configuration via programmable switching frequency and ability to synchronize switching frequency.