Automotive Regulator Selection Guide Ver.3.2 Creating the future of Automobiles

In recent years the mobility sector has reached a period of major change with the increasing proliferation of EVs and autonomous driving systems, driving the demand for automotive-grade semiconductors. ROHM has consistently provided a stable supply of high quality products and solutions by leveraging an integrated development system and industry-leading technologies cultivated since the company was established in 1958. Even now, ROHM continues to develop products that minimize environmental impact in the mobility sector by taking advantage of proprietary groundbreaking technologies such as Nano...

Linear Regulators Automotive Regulator Selection Guide 02

Automotive Switching Regulator Lineup Output Current(A) Synchronous Secondary rectification ^Nano Nano Pulse Control™ JSSCG Spread spectrum function ^LLM Light load mode Series Name Series Name Series Name Maximum rating Buck-Boost External Synchronization External Synchronization External Synchronization External Synchronization 03 Automotive Regulator Selection Guide

125˚C: 125˚C compatibility External Synchronization External synchronization function Note: Nano Pulse Control™ is a trademark or registered trademark of ROHM Co., Ltd. Automotive Regu

High Speed Response Solution Low Quiescent Current + High Speed Response Solution BD9Pxx5EFV-C/ BD9Pxx5MUF-C Application Circuit The BD9Pxx5EFV/ MUF-C are low quiescent current buck DC/ DC converters that integrate ROHM’s proprietary Nano Pulse Control™ technology. This enables stable operation even at high step-down ratios. In addition to heavy loads, LLM (Light Load Mode) achieves high efficiency and low current consumption even during light loads. What’s more, a minimum operating voltage of 3.5V ensures exceedingly stable output even during cold cranking. Overview: BD9Pxx5EFV/MUF-C series...

BD906x0EFJ-C/BD906x0HFP-C series Low Voltage Operation Low Voltage Operation Solution Flexible Design The BD906x0EFJ-C/BD906x0HFP-C are switching regulators with built-in high voltage power MOSFET that allows the operating frequency to be arbitrarily set via external resistors. Features include a wide input voltage(3.5V to 36V) broad operating temperature range(-40°C to +125°C), and the ability to synchronize with an external clock using the external synchronization input pin. In the case of stop-start vehicles, normal operation is required even during severe voltage drops from conventional cranking...

Primary Switching Regulators BD9901xEFV-M series BD9901xEFV-M series Application Circuit Diagram Low Quiescent Current Solution The BD99010EFV-M and BD99011EFV-M are low Iq buck DC/DC converters with built-in 3.3V and 5V power MOSFETs, respectively. In addition to achieving high efficiency while maintaining regulated output voltage during heavy loads, LLM(Light Load Mode) ensures high efficiency and low current consumption even during light loads. The minimum operating voltage of 3.6V maintains output even during cold cranking. Also, current mode control enables fast response with easy phase...

B Buck-Boost Primary Switching Regulators BD8P250MUF-C+BD90302NUF-C The BD8P250MUF-C is a 5V fixed output synchronous rectification buck DC/DC converter with boost control function. In the event output voltage drop is permitted when the input voltage decreases (i.e. during cold cranking), it is used as a buck DC/DC converter, and in cases where the output voltage needs to be maintained it can function as a buck-boost DC/DC converter by connecting to a dedicated boost FET. In addition, Quick Buck Booster™ technology provides high-speed response during buck-boost operation, allowing the capacitance...

60V Input High Step-down Ratio Switching RegulatorBD9V100MUF-C Application Circuit Diagram Power supply solution for 48V hybrid systems The BD9V100MUF-C utilizes ROHM’s ultra-fast pulse control technology Nano Pulse Control™ to achieve a high step-down ratio of up to 24:1 at 2MHz. For example, 2V output is possible from a 48V power supply at 2MHz. This makes it possible to reduce the number of power ICs required for step-down from high voltage to low voltage from two or more with conventional solutions to just one, contributing to set miniaturization and simpler system design. VIN PVIN EN PGND...

Technologies that Maximize the Features of Switching Regulators External Synchronization Function Increasing Switching Frequency A •anfunction that enables synchronous switching with external clock Shifts the second•affect the AM radioand third-order harmonics that band Includes functions primarily used for vehicle •multimedia systems frequency trade-off between AM and FM radio band noise ● High switching frequency above 2MHz does not generate a spectrum in the AM band ● Increasing the switching frequency above 2MHz increases the noise level in the FM radio band 400kHz operation Fundamental AM...

Primary Switching Regulator Product Specifications TableBuck Solutions

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Compact-Large Current Space-Saving High Efficiency Solutions BD9Sx00MUF-C series Application Circuit Diagram The BD9Sx00MUF-C series are synchronous rectification buck DC/DC converters with integrated low ON resistance power MOSFET. These are offered in a compact 3.0x3.0mm package. The high 2.2MHz switching frequency (self-oscillation) supports smaller inductors while the built-in external synchronization function allows the switching frequency to be synchronized with an external pulse. In addition, LLM control ensures superior efficiency at light loads, making it possible to reduce application...

BD9SxxxNUX-C series Space-Saving High Efficiency Solutions BD9SxxxNUX-C series Application Circuit Diagram The BD9SxxxNUX-C series are synchronous rectification buck DC/DC converters integrates a low ON resistance power MOSFET. These are offered in a compact 2.0x2.0mm package. The high 2.2MHz switching frequency (self-oscillation) supports smaller inductors. In addition, the built-in phase compensation circuit makes it possible to configure applications using few external parts. And current mode control ensures fast transient response. Also, fixed output models in the BD9Sx1xNUX-C lineup utilize...