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FAN4855 Datasheet(PDF) 3 Page - Fairchild Semiconductor |
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FAN4855 Datasheet(HTML) 3 Page - Fairchild Semiconductor |
3 / 12 page 3 www.fairchildsemi.com FAN4855 Rev. 1.0.1 Recommended Operating Conditions Electrical Characteristics Unless otherwise specified, VIN = 1.6V to 3V, ILOAD = 1mA, TA = -40°C to +85°C. Test Circuit Fig.1. Typical values are at TA = +25°C Notes: 1. R4, R5, R6 tolerance ≤ 0.1%. 2. Current through R1, R2 is not taken into account. Parameter Min. Max. Units Ambient Temperature Range -40 +85 °C VIN Operating Range 1.6 0.9 VOUT V VOUT Operating Range 3.0 5.0 V Parameter Conditions Min. Typ. Max. Units Start Up Voltage ILOAD < 1mA 1.35 1.6 V Operating Voltage After start ILOAD =10mA, VOUT = 3.3V or 5V 1.0 V Output Voltage VOUT(nom.) = 3.3V (Note 1) VOUT(nom.) = 5V 3.15 4.775 3.3 5 3.45 5.225 V V Output Voltage Adjust Range 3 5 V Steady State Output Current VOUT = 3.3V, VIN = 2.5V 300 500 mA VOUT = 5V, VIN = 2.5V 200 330 mA Pulse Width VIN = 3V 0.8 1.4 2 µs VIN = 2.4V 1.2 1.7 2.5 µs VIN = 1.8V 1.6 2.2 3.3 µs VIN = 1.6V 1.7 2.5 4.0 µs Minimum Off-Time 1 µs Line Regulation IOUT = 2mA, VOUT = 3.3V 0.5 2 % VOUT = 5V 0.5 2 % Load Regulation 0 to 250mA, VIN = 2.4V, VOUT = 3.3V 0.5 % 0 to 150mA, VIN = 2.4V, VOUT = 5V 1 % Feedback Voltage (VFB) 1.243 V LBI Threshold Voltage 0.390 V LBI Hysteresys 25 mV Internal NFET, PFET ON Resist. ILOAD = 100mA 0.35 Ω Power Efficiency ILOAD = 200mA, VIN = 3V, VOUT = 3.3V 95 % Input Current in Shut Down Mode SHDN = 0V, VIN = 3V (Note 2) 8 50 µA Quiescent Current SHDN = 3V, VIN = 3V, VOUT = 3.3V (Note 2) 80 160 µA LBO Output Voltage Low VLBI = 0, ISINK = 1mA 0.2 V SHDN Input Threshold Voltage VIN = 3V, VOUT = 3.3V/5V 1.5 V SHDN Input Threshold Voltage VIN = 1.6V, VOUT = 3.3V/5V 0.8 V |
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