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ST1S12GR - Synchronous rectification

Description

The ST1S12 is a step down DC-DC converter optimized for powering low-voltage digital cores in HDD applications and, generally, to replace the high current linear solution when the power dissipation may cause high heating of the application environment.

Features

  • Step-down current mode PWM (1.7 MHz) DCDC converter 3% DC output voltage tolerance Synchronous rectification Fixed output voltage 1.2 V, 1.8 V, and ADJ (available on request 1.5 V, 2.5 V and 3.3 V) Enable function Internal soft start Typical efficiency: > 90% 0.7 A output current capability Not switching quiescent current: max 650 µA over temperature range RDSON typ. 250 mΩ and 400 mΩ Uses tiny capacitors and inductor.

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Full PDF Text Transcription

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ST1S12XX ST1S12XX12, ST1S12XX18 Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or adjustable step-down switching regulator in TSOT23-5L Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Step-down current mode PWM (1.7 MHz) DCDC converter 3% DC output voltage tolerance Synchronous rectification Fixed output voltage 1.2 V, 1.8 V, and ADJ (available on request 1.5 V, 2.5 V and 3.3 V) Enable function Internal soft start Typical efficiency: > 90% 0.7 A output current capability Not switching quiescent current: max 650 µA over temperature range RDSON typ. 250 mΩ and 400 mΩ Uses tiny capacitors and inductors Operative junction temp. -40 °C to 125 °C Available in TSOT23-5L package guaranteed by the current mode PWM topology and by the use of low ESR SMD ceramic capacitors.
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