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FAN5341UMPX Scheda tecnica(PDF) 5 Page - Fairchild Semiconductor |
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FAN5341UMPX Scheda tecnica(HTML) 5 Page - Fairchild Semiconductor |
5 / 11 page © 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5341 • Rev. 1.0.0 5 Electrical Specifications VIN = 2.7V to 5.5V and TA = -40°C to +85°C unless otherwise noted. Typical values are at TA = 25°C and VIN = 3.6V. Symbol Parameter Conditions Min. Typ. Max. Units Power Supplies ISD Shutdown Supply Current EN = GND, VIN = 3.6V 0.30 0.75 μA VUVLO Under-Voltage Lockout Threshold VIN Rising 2.10 2.35 2.60 V VIN Falling 1.90 2.15 2.40 VUVHYST Under-Voltage Lockout Hysteresis 250 mV EN: Enable Pin VIH HIGH-Level Input Voltage 1.2 V VIL LOW-Level Input Voltage 0.4 V REN EN Pull-Down Resistance 200 300 400 k Ω TLO EN Low Time for Dimming VIN = 3.6V; See Figure 14 0.5 300 µs THI Time Delay Between Steps VIN = 3.6V; See Figure 14 0.5 µs TSD EN Low, Shutdown Pulse Width VIN = 3.6V; from Falling Edge of EN 1 ms Feedback and Reference VFB Feedback Voltage ILED = 20mA from -40°C to +85°C, 2.7V ≤ VIN ≤ 5.5V 240 253 266 mV IFB Feedback Input Current VFB = 253mV 0.1 1.0 μA Power Outputs RDS(ON)_Q1 Boost Switch On-Resistance VIN = 3.6V, ISW = 100mA 600 m Ω VIN = 2.7V, ISW = 100mA 650 ISW(OFF) SW Node Leakage (1) EN = 0, VIN = VSW = VOUT = 5.5V, VLED = 0 0.1 2.0 μA ILIM-PK Boost Switch Peak Current Limit VIN = 3.6V 750 mA Oscillator fSW Boost Regulator Switching Frequency 1.0 1.2 1.4 MHz Output and Protection VOVP Boost Output Over-Voltage Protection 18.0 18.9 21.0 V OVP Hysteresis 0.8 VTLSC VOUT Short Circuit Detection Threshold VOUT Falling VIN – 1.4 V VTHSC VOUT Short Circuit Detection Threshold VOUT Rising VIN – 1.2 V DMAX Maximum Boost Duty Cycle (2,3) 85 % DMIN Minimum Boost Duty Cycle (2,3) 20 TTSD Thermal Shutdown 150 °C THYS Thermal Shutdown Hysteresis 35 °C Notes: 1. SW leakage current includes the leakage current of 2 internal switches; SW to GND and SW to VOUT. 2. Not tested in production and guaranteed by design. 3. Application should guarantee that minimum and maximum duty cycle should fall between 20-85% to meet the specified range. |
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