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FAN5331 Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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FAN5331 Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 10 page ©2004 Fairchild Semiconductor Corporation 1 www.fairchildsemi.com August 2005 FAN5331 Rev. 1.0.1 FAN5331 High Efficiency Serial LED Driver and OLED Supply with 20V Integrated Switch Features ■ 1.6MHz Switching Frequency ■ Low Noise ■ Low RDS(ON): 0.5Ω ■ Adjustable Output Voltage ■ 1A Peak Switch Current ■ 1W Output Power Capability ■ Low Shutdown Current: <1µA ■ Cycle-by-Cycle Current Limit ■ Over-Voltage Protection ■ Fixed-Frequency PWM Operation ■ Internal Compensation ■ 5-lead SOT-23 Package Applications ■ Cell Phones ■ PDAs ■ Handheld Equipment ■ Display Bias ■ LED Bias Description The FAN5331 is a general purpose, fixed-frequency boost con- verter designed to operate at high switching frequencies in order to minimize switching noise measured at the battery ter- minal of hand-held communications equipment. Quiescent cur- rent in normal mode of operation as well as in shutdown mode is designed to be minimal in order to extend battery life. Normal mode of operation or shutdown mode can be selected by a logic level shutdown circuitry. The low ON-resistance of the internal N-channel switch ensures high efficiency and low power dissipation. A cycle-by-cycle cur- rent limit circuit keeps the peak current of the switch below a typical value of 1A. The FAN5331 is available in a 5-lead SOT- 23 package. Typical Application Figure 1. Typical Application Diagram SHDN VIN VOUT R1 R2 GND VIN FB SW CF CIN 10µH 1 3 2 4 5 4.7 µF 120pF COUT L BAT54 4.7 µF 2.7V to 5.5V ON OFF |
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