FAN8303 Fairchild Semiconductor, FAN8303 Datasheet
FAN8303
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FAN8303 Summary of contents
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... For Fairchild’s definition of “green” Eco Status, please visit: © 2008 Fairchild Semiconductor Corporation FAN8303 • Rev. 1.0.0 Description The FAN8303 is a monolithic, non-synchronous, step- down (buck) regulator with internal power MOSFETs. It achieves 2A continuous output current over a wide input supply range with excellent load and line regulation. ...
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... Internal Block Diagram © 2008 Fairchild Semiconductor Corporation FAN8303 • Rev. 1.0.0 Figure 2. Functional Block Diagram 2 www.fairchildsemi.com ...
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... Feedback COMP 6 Compensation EN 7 Enable SS 8 Soft Start © 2008 Fairchild Semiconductor Corporation FAN8303 • Rev. 1.0 VIN EN SW COMP GND FB Figure 3. Pin Configuration (Top View) High-Side Drive BOOT Voltage. Connect through capacitor (C The IC includes an internal synchronous bootstrap diode to recharge the capacitor on this pin to V when SW is LOW ...
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... Fairchild does not recommend exceeding them or designing to absolute maximum ratings. Symbol V Supply Voltage IN T Operating Ambient Temperature A © 2008 Fairchild Semiconductor Corporation FAN8303 • Rev. 1.0.0 Parameter Human Body Model, JEDEC JESD22-A114 Charged Device Model, JEDEC JESD22- C101 Parameter 4 Min. Max. Unit ...
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... I Supply Current (Quiescent Current Sense Gain CS G Error Amplifier Transconductance EA A Error Amplifier Voltage Gain VEA I Soft-Start Current SS TSD Thermal Shutdown Temperature © 2008 Fairchild Semiconductor Corporation FAN8303 • Rev. 1.0.0 Condition Min. 25°C, 5V<V <23V 0. =0V,V = >0.3V 315 FB Rising V 4 < ...
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... CH2(COMP) : 300mV, 50µs/div. CH3(SW) : 10V, 50µs/div. CH4(Io) : 1A, 50µs/div. CH1 △Vo = 240mV Slew Rate( 2.5A/µs) CH4 CH3 CH2 Figure 8. Load Transient Response (0.5A to 1.5A) © 2008 Fairchild Semiconductor Corporation FAN8303 • Rev. 1.0 10μ 22μ +25 C, unless otherwise noted. IN OUT A CH2 CH1 ...
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... Temperature [℃] Figure 14. Oscillator Frequency vs. Temperature © 2008 Fairchild Semiconductor Corporation FAN8303 • Rev. 1.0.0 (Continued 10μ 22μ +25 C, unless otherwise noted. IN OUT A CH1 CH2 CH1(VO) : 2V, 20µ/div. CH2(VIN) : 4V, 20µs/div. ...
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... MOSFETs. It achieves 2A continuous output current over a wide input supply range from 5V to 23V with excellent load and line regulation. The output voltage can be regulated as low as 0.6V. The FAN8303 uses current-mode operation that provides fast transient response and eases loop stabilization. The FAN8303 requires a minimum number of readily available standard external components ...
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... The goal of the compensation design is to shape the converter frequency response to achieve high DC gain and fast transient, while maintaining loop stability. FAN8303 employs peak current-mode control for fast transient response and to help simplify the loop to a one-pole and one-zero system. The system pole is calculated by the equation: ...
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... MLCC 3.3V 15µH 5V 22µH © 2008 Fairchild Semiconductor Corporation FAN8303 • Rev. 1.0.0 Layout Consideration As with all switching power supplies, careful attention to PCB layout is important to the design. A few design rules should be implemented to ensure good layout: Keep the high-current traces and load connections ⎞ ...
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... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2008 Fairchild Semiconductor Corporation FAN8303 • Rev.1.0.0 5.00 4.80 A 3.81 ...
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... Fairchild Semiconductor Corporation FAN8303 • Rev.1.0.0 12 www.fairchildsemi.com ...