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A81407

Part Number	A81407
Manufacturer	ALLEGRO
Description	Multi-Output Regulator
Published	Dec 7, 2023
Detailed Description	A81407 Multi-Output Regulator with Buck or Buck-Boost Pre-Regulator, 4× LDO Outputs, Watchdog, 4× Gate Drivers, and SPI ...
Datasheet	A81407 PDF File

Overview

A81407 Multi-Output Regulator with Buck or Buck-Boost Pre-Regulator, 4× LDO Outputs, Watchdog, 4× Gate Drivers, and SPI FEATURES AND BENEFITS • A2-SIL™ pending—device features for safety-critical systems • Automotive AEC-Q100 qualified • Wide input voltage range, 3.
8 to 36 VIN operating range, 40 VIN maximum • 2.
2 MHz buck or buck/boost pre-regulator (VREG: 5.
35 V) with low EMI frequency dithering • Frequency dithering and controlled slew rate help reduce EMI/EMC • Four internal linear regulators with foldback short-circuit protection □ VUC: selectable output (3.
3 V / 5.
0 V) regulator for microcontroller □ V5A: 5 V general purpose LDO regulator □ V5P1 and V5P2: two LDO regulators with short-to- battery protection for remote sensors • OV and UV protection for all output rails provides ability to monitor health of outputs • Pulse Width Watchdog (PWWD), Window Watchdog (WWD), and Q&A Watchdog (QAWD) • Floating gate drivers (with charge pumps) for external switched load control • Analog multiplexor (AMUX) reports operational values of multiple important parameters • Safety signal (POE) can disable a separate function (e.
g.
, motor driver) due to a Watchdog Failure Continued on next page.
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APPLICATIONS Provides system power (for microcontroller/DSP, CAN, sensors, etc.
) and high-side gate driver control (for motor phases and other switched loads such as solenoid valves and SS relays) in: • Industrial applications • Electronic power steering (EPS) 2 • Advanced braking systems (ABS) - • Transmission control units (TCU) • Emissions control modules • Other automotive applications (pending) DESCRIPTION The A81407 is ideal for both automotive and industrial applications, where high temperature operation, a high level of integration, and robust solutions are required.
The IC integrates a buck or buck/boost pre-regulator, four LDOs, and four floating gate drivers.
The pre-regulator uses a buck or buck/boost topology to efficiently convert input voltages into a tigh...

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A81407 Multi-Output Regulator - ALLEGRO

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