FAN5331 Fairchild Semiconductor, FAN5331 Datasheet
FAN5331
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FAN5331 Summary of contents
Page 1
... 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. BAT54 L ...
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... Using EIA/JESD22A114B (Human Body Model) and EIA/JESD22C101-A (Charge Device Model). 3. This load capacitance value is required for the loop stability. Tolerance, temperature variation, and voltage dependency of the capacitance must be considered. Typically a 4.7µF ceramic capacitor is required to achieve specified value 15V. OUT FAN5331 Rev. 1.0.1 Top View GND ...
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... Feedback Pin Bias Current Feedback Voltage Line Regulation Switching Frequency Maximum Duty Cycle Enable Delay Power on Delay Switch Leakage Current Test Circuit 2. OFF FAN5331 Rev. 1.0.1 = -40°C to +85°C, Typical values are Conditions 15V, V 2.7V OUT 15V, V 3.2V OUT ...
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... VIN(V) vs Efficiency at Iload =40mA 0.74 VIN(V) vs Efficiency at Iload =50mA 0.72 2.5 3.0 3.5 4.0 4.5 Input Voltage (V) Supply Current vs Input Voltage 3.0 2.5 2.0 Switching 1.5 Non Switching 1.0 0.5 0.0 2.5 3.0 3.5 4.0 4.5 Input Voltage (V) FAN5331 Rev. 1.0.1 Maximum Load Current vs Input Voltage 210 300 180 250 150 200 120 150 90 100 4.5 5.0 5.5 6.0 2.5 2.5 Feedback Voltage vs Ambient Temperature 1. ...
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... 15V OUT Inductor Current= 0mA Time (200 s/div) Load Transient Response < 15V OUT 35mA OUT Time (20 s/div) FAN5331 Rev. 1.0.1 (Contd.) Line Transient Response I = 30mA OUT 15V OUT V = 3.2V IN Time (100 s/div) ...
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... Inductor Selection The inductor parameters directly related to device performances are saturation current and dc resistance. The FAN5331 oper- ates with a typical inductor value of 10µH. The lower the dc resistance, the higher the efficiency. Usually a trade-off between inductor size, cost and overall efficiency is needed to make the optimum choice ...
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... When the die temperature exceeds 150°C, a reset occurs and will remain in effect until the die cools to 130°C, at that time the circuit will be allowed to restart. FAN5331 Rev. 1.0.1 PCB Layout Recommendations The inherently high peak currents and switching frequency of power supplies require careful PCB layout design. Therefore, ...
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... RMS A Zener diode (V = 22V) connected between V Z can prevent the FAN5331 from being damaged by over-voltage, if the load is accidently disconnected during operation. 2. Dual Boost Converter A negative voltage can be provided by adding an external charge pump (C1, C2, D2, and D3). BAT54S C1 0 ...
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... B .008 .020 c .003 .010 D .106 .122 E .059 .071 e .037 BSC e1 .075 BSC H .087 .126 L .004 .024 0º 10º Ordering Information Product Number FAN5331 FAN5331 Rev. 1.0 Millimeters Notes Min Max .90 1.45 .00 .15 .20 .50 .08 .25 2.70 3.10 1.50 1.80 .95 BSC 1.90 BSC 2.20 3.20 ...
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... PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Preliminary No Identification Needed Obsolete FAN5331 Rev. 1.0.1 ISOPLANAR™ PowerSaver™ LittleFET™ PowerTrench MICROCOUPLER™ QFET QS™ MicroFET™ QT Optoelectronics™ ...