ST1S03A集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF中文资料

ST1S03A属于集成电路（IC）的稳压器-DC-DC开关稳压器。由意法半导体集团制造生产的ST1S03A稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。

描述 Description

The ST1S03A is a step down DC-DC converter optimized for powering low-voltage digital core in HDD applications and, generally, to replace the high current linear solution when the power dissipation may cause an high heating of the application environment. It provides up to 1.5A over an input voltage range of 3V to 5.5V. An high switching frequency (1.5MHz) allows the use of tiny surface-mount components: as well as the resistor divider to set the output voltage value, only an inductor, a schottky diode and two capacitors are required. Besides, a low output ripple is guaranteed by the current mode PWM topology and by the use of low E.S.R. SMD ceramic capacitors. The device is thermal protected and current limited to prevent damages due to accidental short circuit. The ST1S03A is available in DFN6 (3x3).

特性 Features

■ Step-down current mode PWM (1.5MHz) DCDC converter

■ 2 DC output voltage tolerance

■ Internal soft start for start-up current limitation and power on delay of 50-100µs

■ Typical efficiency: > 85

■ Inhibit function

■ 1.5A Output current capability

■ Not switching quiescent current: max 1.5mA over temperature range

■ Switch VDS: max 200mV @ ISW=750mA

■ Uses tiny capacitors and inductors

■ Available in DFN6 3x3 exposed pad