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A8590

Allegro
Part Number A8590
Manufacturer Allegro
Description 3.0A Asynchronous Buck Regulator
Published Dec 12, 2019
Detailed Description A8590 Wide Input Voltage, 2.4 MHz, 3.0 Amp Asynchronous Buck Regulator With Low-IQ Standby, Sleep Mode, External Synchr...
Datasheet PDF File A8590 PDF File

A8590
A8590

Overview
A8590 Wide Input Voltage, 2.
4 MHz, 3.
0 Amp Asynchronous Buck Regulator With Low-IQ Standby, Sleep Mode, External Synchronization, and NPOR Output FEATURES AND BENEFITS • Automotive AEC-Q100 qualified • Withstands surge voltages up to 40 V • Operates as low as 3.
4 VIN (typ) with VIN decreasing • Uses pulse frequency modulation (PFM) to draw only tens of microamperes from VIN while maintaining keepalive VOUT • PWM/PFM mode control input pin • Delivers up to 3.
0 A of output current with integrated 110 mΩ high voltage MOSFET • SLEEP input pin commands ultra-low current shutdown mode • Adjustable output voltage with ±1.
0% accuracy from 0°C to 85°C, ±1.
5% from –40°C to 150°C • Programmable switching frequency: 250 kHz to 2.
4 MHz • Synchronization capability: applying a clock input to PWM/PFM input pin will increase PWM frequency • Active low, power-on reset (NPOR) open-drain output Continued on next page.
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Package: 16-Pin TSSOP with Exposed Themal Pad (suffix LP) Not to scale DESCRIPTION Designed to provide the power supply requirements of nextgeneration car audio and infotainment systems, the A8590 provides all the control and protection circuitry to produce a high-current regulator with ±1.
0% output voltage accuracy.
The A8590 employs pulse frequency modulation (PFM) to draw less than 50 μA from 12 VIN while supplying 3.
3 V / 40 μA.
After startup, the A8590 operates down to at least 3.
6 VIN (VIN falling).
Features of the A8590 include a PWM/PFM mode control input to enable PWM (logic high) or PFM (logic low).
If the PWM/PFM input is driven by an external clock signal higher than the base frequency (fOSC), the PWM frequency synchronizes to the incoming clock frequency.
The SLEEP input pin commands an ultra-low current shutdown mode requiring less than 5 μA for internal circuitry and 10 μA (max) for MOSFET leakage at 16 VIN, 85°C.
The A8590 has external compensation to accommodate a wide range of frequencies and external components, and provides a power-on reset (NPOR...


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