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PM6644 - 350mA adjustable step-down regulator

General Description

The PM6644 is a 350 mA valley current limit stepdown regulator capable of delivering an adjustable output voltage in the range between 0.9 V and 8 V.

A fixed value of output voltage is also available (3.47 V), saving the external resistor divider.

It is housed in a small DFN10 3x3 package.

Key Features

  • 4.5 V to 25 V input voltage range Output voltage VOUT: fixed 3.47 V or adjustable 0.9 V to 8 V 350 mA valley current limit Constant-on-time control Programmable switching frequency Pulse skipping mode (skip mode) at light loads Independent EN signals Latched OVP and UVP switching regulator can be programmed to regulate a fixed value of 3.47 V or it can deliver an adjustable voltage, depending on the FB pin setup. DFN10.

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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.

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PM6644 350 mA adjustable step-down regulator Datasheet − production data Features ■ ■ ■ ■ ■ ■ ■ ■ 4.5 V to 25 V input voltage range Output voltage VOUT: fixed 3.47 V or adjustable 0.9 V to 8 V 350 mA valley current limit Constant-on-time control Programmable switching frequency Pulse skipping mode (skip mode) at light loads Independent EN signals Latched OVP and UVP switching regulator can be programmed to regulate a fixed value of 3.47 V or it can deliver an adjustable voltage, depending on the FB pin setup. DFN10 Applications ■ ■ ■ ■ Networking power supply Portable applications Microcontroller supply Industrial supply Description The PM6644 is a 350 mA valley current limit stepdown regulator capable of delivering an adjustable output voltage in the range between 0.9 V and 8 V.