AP65455: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)
AP65455AP65455.pdf--90 (high-side) / 57 (low side)6504.5--0.76 to 6600
Description

The AP65455 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 AP65455 features programmable soft-start, UVLO, OTP, high voltage tolerance EN pin, Power Good and OCP to protect the circuit. This IC is available in DFN3030-10 package.

Application

Point of Load power

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
  • Support Power Good Pin
  • High Voltage Tolerance EN pin
  • Built-in Thermal Shutdown Protection
  • Programmable Soft-start
  • Pre-biased Start-up
Ordering Information
  • AP65455FN-7
U-DFN3030-10
AP65455.pdf AP65455
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