DC-DC Converter

Single Output Buck Converter

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uP1722P/Q

1.5MHz, 1.3A, High-Efficiency Synchronous-Rectified Buck Converter

Datasheets PDF

General Description

The uP1722 is a high efficiency synchronous-rectified buck converter with internal power switches. Fixed 1.5MHz PWM operation allows possible smallest output ripple and external component size. With high conversion efficiency and small package, the uP1722 is ideally suitable for portable devices and USB/PCIE-based interface cards where PCB area is especially concerned.

With internal low RDS(ON) switches, the uP1722 is capable of delivering 1.3A peak output current over a wide input voltage range from 2.6V to 5.5V. The output voltage is adjustable from 0.6V/0.5V (uP1722P/uP1722Q) to VIN by a voltage divider. Other features include internal soft-start, chip enable, under-voltage, over-temperature and overcurrent protections. The uP1722 is available in space-saving WDFN2x2-6L, TSOT23-5L and SOT23-5L packages with fixed or adjustable output voltage options.

Pin Configuration & Typical Application Circuit


(T)SOT23-5L


(T)SOT23-5L
WDFN2x2-6L

Feature

  • 2.6V to 5.5V Input Voltage Range
  • 1.3A Peak Output Current
  • Accurate Reference with +/- 2% Accuracy
    • 0.6V (uP1722P)
    • 0.5V (uP1722Q)
  • Up to 95% Conversion Efficiency
  • Typical Quiescent Current: 60uA
  • Integrated Low RDS(ON) Upper and Lower MOSFET Switches: 300mΩ and 250mΩ
  • Current Mode PWM Operation
  • Fixed Frequency: 1.5MHz
  • 100% Maximum Duty Cycle for Lowest Dropout
  • Internal Soft-Start
  • Under-Voltage Protection
  • Over-Temperature and Over-Current Protection
  • Space-Saving WDFN2x2-6L, TSOT23-5L and SOT23-5L packages
  • RoHS Compliant and Halogen Free

Application

  • Battery-Powered Portable Devices
    • MP3 Players
    • Digital Still Cameras
    • Wireless and DSL Modems
    • Personal Information Appliances
    • Cellular Telephones
  • 802.11 WLAN Power Supplies
  • FPGA/ASIC Power Supplies
  • Dynamically Adjustable Power Supply for CDMA/WCSMA Power Amplifiers
  • USB-Based xDSL Modems and Other Network Interface Cards