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Automotive PMIC With Buck Or Buck/Boost Pre-Regulator Delivers Multiple Outputs


Allegro MicroSystems Inc.
September 22, 2016

Groomed for automotive applications and adjustable as a buck or buck-boost pre-regulator, the A4413 PMIC delivers a 5V, 75 mA output for remote sensors (V5P) and a 0.8V to 3.3V, 800 mA maximum adjustable synchronous buck regulator output. The device can be enabled by its logic-level (ENB) or high-voltage (ENBAT) input. Diagnostic outputs from the A4413 include a power-on-reset output (NPOR) with a 2 ms rising delay to monitor the synchronous buck, a PowerOK output to monitor the 5 V LDO (POK5V), and an ENBAT status output (ENBATS). Dual bandgaps—one for regulation and one for fault detection—improve long-term reliability of the A4413. Protection features include under- and overvoltage lockout on both output supply rails. In case of a shorted output, the LDO regulator features foldback overcurrent protection. In addition, the 5V output is protected from a short-to-battery event. Both switching regulators include pulse-by-pulse current limit, hiccup mode short-circuit protection, LX (regulator output switching node) short-circuit protection to provide protection to the IC from damage in the case of accidental short-circuit from LX pins, missing asynchronous diode protection (VREG only), and thermal shutdown (TSD). The A4413 comes in a 32-lead, 5 mm x 5 mm, 0.5 mm pitch QFN package (suffix “ET”) with exposed thermal pad. Price is $2.24 each/1,000.

Allegro MicroSystems
Worcester, MA
508-853-5000
http://www.allegromicro.com
 


CONTACT INFO

Company Allegro MicroSystems Inc.
Country United States (USA)
Email sales@allegromicro.com
Phone 508-853-5000
Fax 508-853-7895
URL http://www.allegromicro.com/