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3A, Ultra Low Dropout (0.23V Typical) Linear Regulator

  • Ultra Low Dropout
- 0.23V (typical) at 3A Output Current
  • Low ESR Output Capacitor (Multi-layer Chip Capacitors (MLCC)) Applicable
  • 0.8V Reference Voltage
  • High Output Accuracy
- ±1.5% over Line, Load, and Temperature Range
  • Fast Transient Response
  • Adjustable Output Voltage
  • Power-On-Reset Monitoring on Both VCNTL and VIN Pins
  • Internal Soft-Start
  • Current-Limit and Short Current-Limit Protections
  • Thermal Shutdown with Hysteresis
  • Open-Drain VOUT Voltage Indicator (POK)
  • Low Shutdown Quiescent Current
  • Shutdown/Enable Control Function
  • Simple SOP-8P and TDFN3x3-10 Packages with Exposed Pad
  • Lead Free and Green Devices Available (RoHS Compliant)

General Description
The APL5934 is a 3A ultra low dropout linear regulator. The IC needs two supply voltages, one is a control voltage (VCNTL) for the control circuitry, the other is a main supply voltage (VIN) for power conversion, to reduce power dissipation and provide extremely low dropout voltage. The APL5934/B integrates many functions. A Power-OnReset (POR) circuit monitors both supply voltages on VCNTL and VIN pins to prevent erroneous operations. The functions of thermal shutdown and current-limit protect the device against thermal and current over-loads. A POK indicates the output voltage status with a delay time set internally. It can control other converter for power sequence. The APL5934/B can be enabled by other power systems. Pulling and holding the EN/ENB voltage below 0.4V shut/enable off the output. The APL5934 is available in a SOP-8P package which features small size as SOP-8 and an Exposed Pad to reduce the junction-to-case resistance to extend power range of applications.

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