ROHM Semiconductor BD4xS5-C Fixed Output LDO Regulators

ROHM Semiconductor BD4xS5-C Fixed Output Low Dropout (LDO) Regulators are engineered for high-reliability applications in automotive and industrial systems. These regulators offer fixed output voltages ranging from 1.8V to 5.0V, with a wide input voltage range up to 45V, making the regulators suitable for use in environments with fluctuating or high-voltage power sources. Designed to meet AEC-Q100 automotive standards, the ROHM Semiconductor BD4xS5-C series is ideal for powering Electronic Control Units (ECUs), Advanced Driver Assistance Systems (ADAS), infotainment systems, and industrial control units. Key features include a low dropout voltage, low quiescent current, and built-in protection functions such as overcurrent protection (OCP), thermal shutdown (TSD), and output discharge. Housed in compact packages, these regulators support space-constrained designs while ensuring stable and efficient power delivery to microcontrollers, sensors, and communication modules.

Features

  • Qualified for automotive applications, AEC-Q100 Grade 1 qualified
  • Wide 3.0V to 42V operating input range
  • Low 38μA typical quiescent current
  • 500mA output current
  • High ±2% output voltage accuracy
  • 3.3V or 5.0V typical output voltage
  • Enable input (only W: includes enable input)
  • Overload Current Protection (OCP)
  • Thermal Shutdown Protection (TSD)
  • Package options
    • TO252-3, 6.5mm × 9.5mm × 2.5mm
    • TO252-5, 6.5mm × 9.5mm × 2.5mm
    • TO263-3, 10.16mm × 15.10mm × 4.70mm
    • TO263-5, 10.16mm × 15.10mm × 4.70mm
    • HTSOP-J8, 4.9mm × 6.0mm × 1.0mm
  • Wide -40°C to +150°C operating temperature range
  • Functional safety supportive automotive products

Applications

  • Automotive systems
    • ECUs
    • ADAS
    • Infotainment and navigation systems
    • Instrument clusters and dashboard electronics
  • Industrial equipment
    • Factory automation controllers
    • Sensors and actuators
    • Communication modules
    • Power management for microcontrollers and logic circuits
  • Consumer and embedded electronics
    • Internet of Things (IoT) devices
    • Smart meters
    • Wearable electronics
    • Battery-powered systems

Typical Application Circuits

Application Circuit Diagram - ROHM Semiconductor BD4xS5-C Fixed Output LDO Regulators
Published: 2025-05-20 | Updated: 2025-06-13