LDO regulator family optimised and approved for automotive

May 17, 2014 // By Graham Prophet
Rohm has a 16-part lineup of low-dropout regulators (LDOs) for MCU power supplies in automotive body and powertrain systems. The new BD4xxMx series joins the BDxxC0A series designed for power supplies in information systems, such as car infotainment, bring Rohm’s total number of automotive-grade LDOs to 43.

The BD4xxMx series is built in power system 0.35µm BiC-DMOS processes and achieves less than half the no-load current consumption of standard products, contributing to significant energy savings. In addition, novel circuit design enables support for ceramic capacitors, eliminating the need for electrolytic capacitors for oscillation prevention, reducing both mounting area and costs.

As power supply ICs for automotive applications continue to increase in sophistication and functionality, there is a greater need for an expanded lineup to cover a wide range of characteristics and application requirements – such as package type and output current – instead of simply focusing on developing an all-in-one solution.

This broad LDO lineup has six different package types and output voltages and currents to suit a range of automotive applications. The BD4xxMx series is available in a range of form factors, from power packages that support harsh environments to ultra-compact, space-saving types, and in different output currents and voltages. Input tolerance of 45V along with high reliability ensures compatibility with automotive applications. Stable voltage output with no output fluctuations or oscillation is possible using just a small (1-10 µF) external capacitance.

Applications include fuel injection, HEV/EV inverters, tyre pressure monitoring systems, body control modules, smart key, head-up displays, LCD monitors and cluster systems.

Rohm Semiconductor; www.rohm.com/eu