FEB143

July 2005

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)

July 2005

FAN5331/5332 Evaluation Board User Manual

FAN5331/5332 Evaluation Board User Manual
2.7 to 5.5V Input Range VIN to 20V Output Range (FAN5331) VIN to 30V Output Range (FAN5332) 1A Peak Switch Current (FAN5331) 1.5A Peak Switch Current (FAN5332) Low Noise Low Shutdown Current: 1uA 1.6 MHz Fixed-Frequency PWM Operation Over Voltage Protection, Shutdown Mode and Soft Start Small 5-lead SOT23 Package

Figure 1: FAN5331SX/32ASX NL

Description:
The FAN5331 and FAN5332 Evaluation Boards are compact circuits including the FAN5331 SX or FAN5332A SX NL in an SOT23 package and two small capacitors which can provide regulated output voltage to the load. The inductor-Schottky diode combination and two typically valued resistors are also included to form a resistor divider to the feedback pin. A feed forward capacitor is provided for stability as well. The FAN5331 and FAN5332 demo boards, completely assembled and tested surface mount boards, provide easy probe access points to all inputs and outputs so that electrical characteristics and waveforms can be easily measured.

Figure 2: Schematic Diagram( )

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FAN5331: R1 150K, R2 13.5K, L1 10uH, CIN 4.7uF, COUT 4.7uF, C3 120pF FAN5332: R1 160K, R2 10K, L1 6.8uH, CIN 10uF, COUT 2.2uF, C3 82pF 1 www.fairchildsemi.com

2005 Fairchild Semiconductor Corporation FAN5331/5332 Version 1.0