ROHM Semiconductor BD9G101G Simple Step-Down Switching Regulators

ROHM BD9G101G Simple Step-Down Switching Regulators are switching regulators with integrated internal high-side 42V Power MOSFETs. They provide 0.5A DC output with a fixed 1.5MHz operating frequency, allowing the use of small inductors and ceramic capacitors. They have built-in phase compensation components and are available in SOT-23-6 (SSOP6) package.

Features

  • High 42V input
  • 0.5A output current
  • Integrated high-side FET
  • Up to 90% efficiency
  • High ±1.5% accuracy feedback reference voltage
  • Enable input pin
  • Overcurrent and thermal shutdown protection
  • Over-/under-voltage lockout
  • Soft start
  • SSOP/SOT23-6 package

Applications

  • Industrial process control
  • Point-of-load and distributed power designs
  • Telecommunications systems
  • Automotive
  • Battery-powered equipment

BD9G101G Evaluation Board

ROHM BD9G101G Evaluation Board is developed to evaluate step-down switching regulator BD9G101G. It has a wide power supply of 6-42V, 1V-29V step-down output. The IC has an internal 800mΩ Nch MOSFET (1A max) and a fixed operating frequency range of 1.5MHz. A Soft Start circuit prevents in-rush current during startup along with protection low voltage error prevention circuit (UVLO), over-current protection (OCP) and thermal shutdown detection (TSD). An EN pin allows can control simple ON/OFF for the IC to reduce standby current consumption.

Published: 2015-05-13 | Updated: 2026-09-25