Part # FAN5307 datasheet

Part Manufacturer: Fairchild Semiconductor

Fairchild Semiconductor

Part Description:

Part Details:

FAN5307 High-Efficienc January 2006 FAN5307High-Efficiency Step-Down DC-DC Converter Features General Description 95% Efficiency, Synchronous Operation The FAN5307, a high efficiency low noise synchronous y Step-Do Adjustable Output Voltage Option from 0.7V to VIN PWM current mode and Pulse Skip (Power Save) mode 2.5V to 5.5V Input Voltage Range DC-DC converter is designed for battery-powered appli- Customized Fixed Output Voltage Options cations. It provides up to 300mA of output current over awide input range from 2.5V to 5.5V. The output voltage Up to 300mA Output Current can be either internally fixed or externally adjustable over Fixed Frequency 1MHz PWM Operation wn DC-DC Con a wide range of 0.7V to 5.5V VIN by an external voltage High Efficiency Power Save Mode divider. Custom output voltages are also available. Con- 100% Duty Cycle Low Dropout Operation tact a Fairchild sales representative for customized out- Soft Start put voltage options. Dynamic Output Voltage Positioning At moderate and light loads pulse skipping modulation is 15µA Quiescent Current used. Dynamic voltage positioning is applied, and the Excellent Load Transient Response output voltage is shifted 0.8% above nominal value forincreased headroom during load transients. At higher ver 5-Lead SOT-23 Package loads the system automatically switches to current mode 6-Lead MLP 3x3mm Package ter PWM control, operating at 1 MHz. A current mode con-trol loop with fast transient response ensures excellent Applications line and load regulation. In Power Save mode, the quies- Pocket PCs, PDAs cent current is reduced to 15µA in order to achieve high Cell Phones efficiency and to ensure long battery life. In shut-down µ Battery-Powered Portable Devices mode, the supply current drops below 1 A. The device isavailable in 5-lead SOT-23 and 6-lead MLP 3x3mm Digital Cameras packages. Low Power DSP Supplies Typical Application EFFICIENCY vs. LOAD CURRENT VOUT = 1.8V 100

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FAN5307.pdf Datasheet