AP65453:Buck Converter

Part NumberData SheetSPICE ModelTypeEfficiency (%)RDS(ON) (mΩ)Frequency Typ (kHz)MinimumInput Voltage (V)MaximumInput Voltage (V)Output Current (A)Output Voltage (V)Standby Quiescent Current Typ (µA)
AP65453AP65453.pdf-Buck-57 (low side) 90 (high side)6504.5184.76 to 6600
Description

The AP65453 is an adaptive constant on-time mode synchronous buck converter providing high efficiency, excellent transient response and high DC output accuracy for low-voltage regulation in digital TV and monitor.

The constant-on-time control scheme handles wide input/output voltage ratios and provides low external component count. The internal proprietary circuit enables the device to adopt both low equivalent series resistance (ESR) output capacitors, such as SP-CAP or POSCAP and ultra-low ESR ceramic capacitors.

The AP65453 features programmable soft-start, UVLO, OTP, high voltage tolerance EN pin and OCP to protect the circuit.

This IC is available in SO-8EP package.

Application
  • Point of Load Power
  • STB
  • LCD-TV
  • Coffee Machines
  • Power Supplies
  • Monitors
  • Communications
Features
  • Fixed Frequency Emulated Constant On-time Control
  • Good Stability Independent of the Output Capacitor ESR
  • Fast Load Transient Response
  • Synchronous Rectification: 90mΩ Internal High-side Switch and 57mΩ Internal Low-side Switch
  • Wide Input Voltage Range: 4.5V to 18V
  • Output Voltage Range: 0.76V to 6V
  • 4A Continuous Output Current
  • 650kHz Switching Frequency
  • Built-in Over Current Limit
  • High Voltage Tolerance EN Pin
  • Built-in Thermal Shutdown Protection
  • Programmable Soft-Start
  • Pre-Biased Start-up
Ordering Information
  • AP65453SP-13
SO-8EP
AP65453.pdf AP65453