DC-DC Converter
Single Output Buck Converter
uP1746P
1MHz, 2A High-Efficiency Synchronous-Rectified Buck Converter
Datasheets PDF
General Description
The uP1746 is a high efficiency synchronous-rectified buck converter with internal power switches. Fixed 1MHz PWM operation allows possible smallest output ripple and external component size. With high conversion efficiency and small package, the uP1746 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 uP1746 is capable of delivering 2A output current over a wide input voltage range from 2.6V to 5.5V. The output voltage is adjustable from 0.6V to VIN by a voltage divider.
Other features include internal softstart, chip enable, under voltage, over temperature and over current protections. The uP1746 is available in space-saving TSOT23-5L, TSOT23-6L, WDFN2x2-6L and WQFN3x3-16L packages with adjustable version of output voltages.
Pin Configuration & Typical Application Circuit
TSOT23 – 5L
TSOT23 – 6L
WDFN2x2-6L
WQFN3x3-16L
Feature
- 2.6V to 5.5V Input Voltage Range
- 2A Guaranteed Output Current
- Accurate Reference 0.6V with ±1.5% Accuracy
- Up to 95% Conversion Efficiency
- Typical Quiescent Current: 40uA
- VOUT Power OK Signal
- Integrated Low RDS(ON) Upper and Lower MOSFET Switches: 100mΩ and 80mΩ
- Current Mode PWM Operation
- Fixed Frequency: 1MHz
- 100% Maximum Duty Cycle for Lowest Dropout
- Under Voltage Protection
- Over Current and Over Temperature Protection
- RoHS Compliant and Halogen Free
Application
- Battery-Powered Portable Devices
- MP3 Players
- Digital Still Cameras
- Wireless and DSL Modems
- Personal Information Applications
- Cellular Telephones
- 802.11 WLAN Power Supplies
- FPGA/ASIC Power Supplies
- Dynamically Adjustable Power Supply for CDMA/WC SMA Power Amplifiers
- USE-Based xDSL Modems and Other Network Interface Cards