The A8591 is designed to provide the power supply requirements of next generation car audio and infotainment systems. The A8591 provides all the control and protection circuitry to produce a high-current regulator with ±1% output voltage accuracy.
The A8591 employs current-mode control to provide simple compensation, excellent stability, and fast transient response. The A8591 employs pulse-frequency modulation (PFM) to draw less than 33 μA from 12 VINwhile supplying 5 V/40 μA (A8591, 5 VOUT), or less than 24 μA from 12 VINwhile supplying 3.3 V/40 μA (A8591-1, 3.3 VOUT). When operational, the A8591 operates down to at least 3.6 VIN(VINfalling). The Sleep feature allows for very low standby current.
Features of the A8591 include a programmable PWM switching frequency. The regulator switching frequency can be synchronized to an external clock. The A8591 has external compensation to optimize stability and transient response for a wide range of external components and applications. The A8591 has a fixed soft-start time of 5 ms.
Extensive protection features of the A8591 include pulse-by-pulse current limit, hiccup mode short-circuit protection, open/short asynchronous diode protection, BOOT open/short voltage protection, VINundervoltage lockout, and thermal shutdown.
The A8591 is supplied in a 10-pin wettable flank DFN package (suffix EJ) with exposed power pad. It is lead (Pb) free, with 100% matte-tin leadframe plating.
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Automotive:
- Instrument clusters
- Audio systems
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- HVAC
- Home audio
- Network and telecom
- Industrial
