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Description

The ST1S09 is a step-down DC-DC converter optimized for powering low output voltage applications. It supplies a current in excess of 2 A over an input voltage range from 2.7 V to 6 V.

A high PWM switching frequency (1.5 MHz) allows the use of tiny surface-mount components.

Features

■ 1.5 MHz fixed frequency PWM with current control mode

■ 2 A output current capability

■ Typical efficiency: > 90

■ 2 DC output voltage tolerance

■ Two versions available: power good or inhibit

■ Integrated output over-voltage protection

■ Non switching quiescent current: (typ) 1.5 mA over temperature range

■ RDSON (typ) 100 mΩ

■ Utilizes tiny capacitors and inductors

■ Operating junction temp. -30 °C to 125 °C

■ Available in DFN6 (3 x 3 mm) exposed pad