Automotive LDOs as an alternative to switching regulators

October 10, 2019 //By Christoph Hammerschmidt
Automotive LDOs as an alternative to switching regulators
Diodes, Inc. has launched two low-dropout (LDO) linear regulators that comply to the automotive quality standard AEC-Q100 Grade 1.

The AP7315Q and AP7343Q deliver 150mA and 300mA respectively and are suitable for automotive applications that require tight voltage regulation across operating conditions, such as point-of-load power supplies in advanced driver assist systems (ADAS), RF communications, infotainment systems, and cameras. 

Automotive manufacturers are integrating an increasing level of ADAS into vehicles with sensors and other sensitive circuits that demand highly stable power supplies. With full production part approval process (PPAP) capability, the AP7315Q and AP7343Q linear regulators can be used in automotive applications that require product qualified to AEC-Q100 with a Grade 1 (-40°C to +125°C) temperature rating.

The AP7315Q and AP7343Q provide practical alternatives to switching regulators in highly demanding automotive applications. As well as current limiting and short-circuit protection, the LDOs feature an enable input that allows the linear regulators to be switched off when not required. While in use, the regulators have a low quiescent current of just 35μA. Both devices are also available with (AP7315DQ/43DQ) and without (AP7315Q/43Q), an output capacitor discharge feature, which is often required to protect sensitive loads during shutdown, such as CMOS image sensors. 

Further information at www.diodes.com


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