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2.5A, 500 kHz Asynchronous Buck Regulator with Wide Input Voltage and Low Iq
A8584
The A8584 provides efficient step-down conversion for a wide input voltage range (4.7V-36V), delivering up to 2.5A output current. Features current-mode control, adjustable switching frequency, and comprehensive protection.
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Supports 40 V input for surge and load dump testing
Adjustable output voltage as low as 0.8 V
Internal 800 mV reference with ±1.5% accuracy
Internal 100 mΩ high-side switching MOSFET
Adjustable switching frequency, fSW: 250 to 500 kHz
Synchronization to external clock: 1.2 × fSW to 1.5 × fSW
Sleep mode supply current less then 3 μA
Soft start time externally set via the SS pin
Very low no-load current
Pre-bias startup compatible
Power OK (POK) output
Pulse-by-pulse current limiting (OCP)
Hiccup mode short-circuit protection (HIC)
Overtemperature protection (TSD)
Open-circuit and adjacent pin short-circuit tolerant
Short-to-ground tolerant at every pin
Externally adjustable compensation
Stable with ceramic output capacitors
The A8584 device is available in a 16-pin TSSOP, (suffix LP), package with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.