Allegro MicroSystems' A8585 is designed to provide the power supply requirements of next-generation car audio and infotainment systems. The A8585 is a variant of the A8580, but with lower IQ, better EMI performance, lower pin count, fixed VOUT (5 V/3.3 V options), options for selectable or auto-switchover of the PWM to PFM mode, and an option for selectable enable/sleep mode.
The options are summarized as follows:
| Two versions of the A8585 |
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- Selectable PWM/PFMn (A8585, A8585-1)
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- Selectable EN/SLEEPn (A8585, A8585-3)
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| Each version has two fixed-output voltage options |
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- 3.3 V±1.0% (A8585-1 and A8585-3)
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- 5.0 V±1.0% (A8585 and A8585-2)
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| Features and Benefits |
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- Utilizes pulse frequency modulation (PFM) for low IQ
- Minimizes battery drain in system quiescent and sleep modes
- VIN operating range: 4 V to 35 V; withstand surge input to 40 V
- Battery load dump capable
- Operates down to 3.4 VIN-(typ)/3.6 VIN-(max)
- Applicable to cold crank and idle/stop/start requirements
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- Delivers up to 2.0 A of output current
- High-current applications
- Integrated 110 mΩ high-side MOSFET
- High efficiency and small implementation size
- Adjustable switching frequency from 300 KHz to 550 KHz
- Reduces interference in AM band and results in low power losses
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| Applications |
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- Automotive infotainment
- Instrumentation cluster
- Center-stack applications
- Automotive lighting controls
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- Advanced driver-assistance systems
- Home audio
- Industrial control
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