ST1S09 - STMicroelectronics

ST1S09 1.5 MHz PWM step-down switching regulator

The ST1S09 is a step-down DC-DC converter optimized for powering low output voltage applications. It supplies a current in excess of 2A over an input voltage range from 2.7V to 6V. A high PWM switching frequency (1.5MHz) allows the use of tiny surface-mount components. Table 1. Devices summary Order codes ST1S09PU ST1S09APU (1) Packaging ST1S09PUR ST1S09A.

Features

■ 1.5MHz fixed frequency PWM with current control mode
■ 2A output current capability www.DataSheet4U.com
■ Typical efficiency: > 90%
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■ 2% DC output voltage tolerance Two versions available: Power Good or Inhibit Integrated output over-voltage protection Non switching quiescent current: (typ) 1.5mA over temperature range RDSON (typ) 100mΩ Utilizes tiny capacitors and inductors Operating junction temp. -30°C to 125°C Available in DFN6 3x3mm exposed pad Moreover, since the required synchronous rectifier is integrated, the number of the external components is reduced to minimum: .