ST1S03

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产品概述

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The ST1S03 is a step-down DC-DC converter optimized for powering a low voltage digital core in HDD applications and, generally, to replace the high current linear solution when the power dissipation may cause a high heating of the application environment. It provides up to 1.5 A over an input voltage range of 3 V to 16 V. A high switching frequency (1.5 MHz) 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 ESR SMD ceramic capacitors. The device is thermal protected and current limited to prevent damages due to an accidental short-circuit. The ST1S03 device is available in a DFN6D package.

所有功能
Step-down current mode PWM (1.5 MHz) DC-DC converter

2% DC output voltage tolerance

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

Typical efficiency: > 70% over all operating conditions

1.5 A output current capability

Not switching quiescent current: max 2.5 mA over temperature range

Switch V_DS: max. 350 mV at I_SW= 750 mA

Uses tiny capacitors and inductors

Available in DFN6D 3 x 3 mm package with exposed pad
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