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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. The switching regulator is based on COT (constant-on-time) architecture, that assures fast load transient response; the embedded voltage feed-forward provides nearly constant switching frequency operation.

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

Applications

■ Networking power supply

■ Portable applications

■ Microcontroller supply

■ Industrial supply