描述 Description

The uP1722 is a high efficiency synchronous-rectified buckconverter with internal power switches. Fixed 1.5MHz PWMoperation allows possible smallest output ripple andexternal component size. With high conversion efficiencyand small package, the uP1722 is ideally suitable forportable devices and USB/PCIE-based interface cardswhere PCB area is especially concerned.

With internal low RDS(ON) switches, the uP1722 is capableof delivering 1.3A peak output current over a wide inputvoltage range from 2.6V to 5.5V. The output voltage isadjustable from 0.6V/0.5V (uP1722P/uP1722Q) to VIN bya voltage divider. Other features include internal soft-start,chip enable, under-voltage, over-temperature and overcurrentprotections. The uP1722 is available in space-savingWDFN2x2-6L, TSOT23-5L and SOT23-5L packages withfixed or adjustable output voltage options.

特性 Features

? 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

應用 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