ST1S09中文资料同步整流2 A、1.5 MHz可调步降开关稳压器，带抑制功能数据手册ST规格书

描述 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.

Moreover, since the required synchronous rectifier is integrated, the number of the external components is reduced to minimum: a resistor divider, an inductor and two capacitors. The Power Good function continuously monitors the output voltage. An open drain Power Good flag is released when the output voltage is within regulation. In addition, a low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR SMD ceramic capacitors. The device is thermally protected and the output current limited to prevent damages due to accidental short circuit. The ST1S09 is available in the DFN6 (3 x 3 mm) package.

特性 Features

• Operating junction temp. -30 °C to 125 °C
• Utilizes tiny capacitors and inductors
• Available in DFN6 (3 x 3 mm) exposed pad
• Non switching quiescent current: (typ) 1.5 mA over temperature range
• Integrated output over-voltage protection
• 1.5 MHz fixed frequency PWM with current control mode
• Typical efficiency: > 90%
• 2 A output current capability
• Two versions available: power good or inhibit
• RDSON (typ) 100 mΩ
• 2 % DC output voltage tolerance

简介

ST1S09属于开发板套件编程器的评估板-DC/DC与AC/DC（离线）SMPS。由ST制造生产的ST1S09评估板 - DC/DC 与 AC/DC（离线）SMPS该系列产品提供了一种方便的方法，可对开关模式电源转换所用的器件（包括 DC-DC 和 AC-DC 型）进行性能或特性评估。“稳压器”（包含内部电源开关装置）和“控制器”（设计为控制外部电源开关）之类的器件均包括在内。