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APW7164

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Synchronous Buck Controller

Features
  • Excellent Reference Voltage Regulations
- 0.8V Internal Reference
- ±1% Over Line Voltage and Temperature Range
  • Integrated Soft-Start
  • Fixed 200kHz Operation Frequency
  • Voltage Mode PWM Operation with Up to 90% (Max.) Duty Cycle
  • Under-Voltage Protection
  • Adjustable Over-Current Protection Threshold
- Using the RDS(ON) of Low-Side MOSFET
  • Over-Voltage Protection
  • Simple SOP-8 Package
  • Lead Free and Green Devices Available (RoHS Compliant)

General Description
The APW7164 is a voltage mode, fixed 200kHz-switching frequency, synchronous buck converter. The APW7164 allows wide input voltage that is either a single 12V or two supply voltage(s) for various applications. A poweron-reset (POR) circuit monitors the VCC supply voltage to prevent wrong logic controls. A built-in digital soft-start circuit prevents the output voltages from overshoot as well as limits the input current. An internal 0.8V temperature-compensated reference voltage with high accuracy is designed to meet the requirement of low output voltage applications. The APW7164 provides excellent output voltage regulations against load current variation. The controller’s over-current protection monitors the output current by using the voltage drop across the RDS(ON) of low-side MOSFET, eliminating the need for a current sensing resistor that features high efficiency and low cost. The APW7164 also integrate over-voltage protection (OVP) and under-voltage protection (UVP) circuits which monitor the FB voltage to prevent the PWM output from over voltage and under voltage. The APW7164 is available in a simple SOP-8 package.

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