FAN8301 Fairchild Semiconductor, FAN8301 Datasheet
FAN8301
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FAN8301 Summary of contents
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... Current-mode operation response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. The regulator draws less than 20µA shutdown current. The FAN8301 requires a minimum number of readily available components. ...
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... Internal Block Diagram © 2008 Fairchild Semiconductor Corporation FAN8301 • 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 FAN8301 • Rev. 1.0 VIN EN SW COMP GND FB Figure 3. Pin Configuration (Top View) Description High-Side Drive BOOT Voltage. Connect through capacitor (C 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 FAN8301 • 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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... OFF I Supply Current (Quiescent Current Sense Gain CS G Error Amplifier Transconductance EA A Error Amplifier Voltage Gain VEA TSD Thermal Shutdown Temperature © 2008 Fairchild Semiconductor Corporation FAN8301 • Rev. 1.0.0 Condition Min. 0.58 T =25°C, 4.75V<V <16V =0V >0.3V 315 ...
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... CH3(SW) : 10V, 50µs/div. CH4(Io) : 1A, 50µs/div. CH1 ΔV =240mV O Slew Rate( 2.5A/µs) CH4 CH3 CH2 Figure 8. Load Transient Response (0.5A to 1.5A) © 2008 Fairchild Semiconductor Corporation FAN8301 • Rev. 1.0.0 =10μF, C =22μF, T =+25°C, unless otherwise noted. IN OUT A CH2 CH1 CH3 CH4 CH1 ...
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... Temperature [ ] Figure 14. Oscillator Frequency vs. Temperature © 2008 Fairchild Semiconductor Corporation FAN8301 • Rev. 1.0.0 (Continued) =10μF, C =22μF, T =+25°C, unless otherwise noted. IN OUT A CH1 CH2 CH3 CH1(VO) : 2V, 20µ/div. CH2(VIN) : 4V, 20µs/div. ...
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... Short-Circuit Protection The FAN8301 protects output short circuit by switching frequency fold-back. The oscillator FAN8301 is reduced to about 45kHz when the output is shorted to ground. This frequency fold-back allows the inductor current more time to decay to prevent potential run-away condition. The oscillator frequency switches to 370kHz as V ...
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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. FAN8301 employs peak current mode control for fast transient response and to help simplify the loop to a one-pole and one-zero system. ...
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... MLCC 3.3V 15µH 5V 22µH © 2008 Fairchild Semiconductor Corporation FAN8301 • Rev. 1.0.0 Layout Consideration As for all switching power supplies careful attention to PCB layout is important to the design. A few design rules can 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 FAN8301 • Rev. 1.0.0 5.00 4.80 A 3.81 ...
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... Fairchild Semiconductor Corporation FAN8301 • Rev. 1.0.0 12 www.fairchildsemi.com ...