In electronic systems where stable, low-noise power is critical—from automotive sensors to industrial controllers and portable IoT devices—linear regulators (LDOs) serve as the backbone of voltage stabilization. ROHM Semiconductor, a global leader in semiconductor solutions with over 70 years of expertise, delivers a comprehensive portfolio of linear regulators engineered for ultra-low power consumption, minimal noise, and robust performance across harsh environments. Covering general-purpose, automotive-grade, and specialty LDOs, ROHM’s products meet the stringent requirements of automotive, industrial, medical, and consumer electronics applications. To ensure genuine procurement, stable inventory, and professional technical support, ROHM partners with top-tier authorized distributors worldwide, enabling seamless access to these mission-critical power management components.

Core Product Lines & Technical Advantages

ROHM’s linear regulators stand out for their tailored performance, reliability, and compliance with industry standards, catering to diverse voltage stabilization needs:

1. General-Purpose Linear Regulators (LD1117 Series)

The LD1117 series is ROHM’s flagship line of general-purpose LDOs, trusted for its balance of cost-effectiveness and performance:

LD1117-3.3: Fixed 3.3V output, 2.5V-15V input range, 800mA maximum output current. Features low dropout voltage (1.2V at 800mA) and low output noise (40µVrms), ideal for microcontrollers, analog circuits, and consumer electronics (e.g., audio devices, routers).

LD1117-5.0: Fixed 5.0V output, 6.5V-15V input, 800mA current. Compact TO-252 and SOT-223 packages, compatible with automated assembly, widely used in industrial sensors and power adapters.

LD1117ADJ: Adjustable output (1.25V-13.8V), 2.5V-15V input, 800mA current. Flexible voltage configuration via external resistors, suitable for custom power supply designs in test equipment and DIY projects.

2. Ultra-Low Power Linear Regulators (BD71837 Series)

Optimized for battery-powered devices, ROHM’s ultra-low quiescent current LDOs extend runtime:

BD71837MUF: 1.8V-6.0V input, 0.8V-5.0V adjustable output, 300mA current. Ultra-low quiescent current (0.5µA typ) and low dropout voltage (150mV at 100mA), ideal for IoT sensors, wearables, and battery-powered medical devices.

BD71830GUL: AEC-Q100 Grade 1 qualified, 2.7V-6.0V input, 1.2V-5.0V output, 500mA current. 1µA quiescent current and -40℃ to 125℃ operating range, suitable for automotive sensors and low-power ECUs.

3. Automotive-Grade Linear Regulators (AEC-Q100 Certified)

ROHM’s automotive LDOs meet the harsh demands of vehicle environments, ensuring reliability in temperature extremes and electromagnetic interference (EMI):

BD90500MUV-E2: 2.0V-16V input, 2.5V-20V output, 500mA current. AEC-Q100 Grade 2 qualified, low EMI (compliant with CISPR 25 Class 3) and over-temperature/over-current protection, used in ADAS cameras and in-vehicle infotainment systems.

BD71840EFJ-E2: Dual-output LDO (300mA+300mA), 4.5V-40V input, fixed 3.3V/5.0V outputs. AEC-Q100 Grade 1, robust EMC performance, ideal for automotive chassis control modules and battery management systems (BMS).

4. Low-Noise Linear Regulators (BD70522 Series)

For noise-sensitive applications like analog circuits and medical devices:

BD70522GUL: 2.7V-6.0V input, 1.2V-5.0V output, 200mA current. Ultra-low output noise (9µVrms) and fast transient response, perfect for audio amplifiers, sensor signal conditioning, and medical imaging equipment.