A8589Designed to meet the power needs of next-generation automotive audio and infotainment systems, providing all control and protection circuitry to produce high-current regulators with ±1.0% output voltage accuracy. The A8589 uses pulse frequency modulation (PFM) to obtain less than 50 from 12VμINAvoltage, simultaneous output of 3.3 V/40 μA. After startup, the A8589 runs to at least 3.6 VIN（VINContinued decline).
The performance of the A8589 includes PWM/PFMn mode control inputs, PWM (Logic High) or PFM (Logic Low) enabled. If the PWM/PFMn input is driven by an external clock signal above the base frequency (fOSC), the PWM frequency will be synchronized with the input clock frequency. The SLEEPn input pin controls a very low current cut-off mode with less than 5 μA internal circuit requirements and 10 μA maximum MOSFET pressure leak at 16 VIN，85ºC。 The A8589 is externally compensated to accommodate a wide range of frequencies and external components, and provides a power-on reset (NPOR) signal with output voltage verification.
The A8589's extensive protection features include pulse-by-pulse current limit, hiccup mode short-circuit protection, on/short asynchronous diode protection, BOOT on/short voltage protection, VIN undervoltage lockout, VOUTOvervoltage protection and thermal shutdown.
A8589Power is supplied in a low-configuration 16-pin TSSOP package with an exposed power board (suffix LP). The package is lead (Pb) free with 100% matte tin leadframe plating.
apply
- For automobiles
- Instrument cluster
- Sound system
- navigation
- HVAC
- Home audio
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- Automotive AEC-Q100 compliant
- Withstand impulse voltages up to 40 V
- Operates as low as 3.4 VIN(typ), VIN keeps declining
- Pulse frequency modulation (PFM) is used from VINOnly tens of microamps are obtained while maintaining dimensional arc VOUT
- PWM/PFMn mode controls the input pins
- Provides up to 2.5 A of output current and integrated 110 mΩ high voltage MOSFETs
- The SLEEPn input pin controls a very low current shutdown mode
- Adjustable output voltage with °1.0% accuracy over the 0±C to 85°C temperature range and °1.5% accuracy over the 40±C to 150–C° temperature range
- Programmable switching frequency: 250 kHz to 2.4 MHz
- Sync function: Apply clock input to
- The PWM/PFMn input pin will increase the PWM frequency
- Low-level, power-on reset (NPOR) open-drain output
- Maximum duty cycle of low dropout pressure
- Prebias startup is possible with no reset of the output voltage
- External compensation can be used for maximum flexibility
- Compatible with ceramic or electrolytic output capacitors
- Excellent protection to meet the most stringent application requirements
- Overvoltage, pulse-by-pulse current limit, hiccup mode short-circuit protection, and thermal protection
- Robust FMEA protects against pin open/short circuits and component faults
- Surface mount package with enhanced thermal dissipation