FAN5353 Fairchild Semiconductor, FAN5353 Datasheet
FAN5353
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FAN5353 Summary of contents
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... FAN5353MPX © 2009 Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 Description The FAN5353 is a step-down switching voltage regulator that delivers an adjustable output from an input voltage supply of 2.7V to 5.5V. Using a proprietary architecture with synchronous rectification, the FAN5353 is capable of delivering 3A at over 85% efficiency. The regulator operates ...
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... Note the bottom heat-sink pad. Ground plane should flow through pins 3, 4, 12, and P1 and can be extended through pin 11 if PGOOD’s function is not required to improve IC cooling. © 2009 Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 Vendor Vishay IHLP1616ABER47M01 Coiltronics SD12-R47-R TDK ...
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... JESD51- JEDEC standard. Special attention must be paid not to exceed junction temperature given ambient temperate T J(max) © 2009 Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 IC Not Switching IC Switching Human Body Model per JESD22-A114 Charged Device Model per JESD22-C101 Min. ...
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... Input OVP Shutdown SDWN Frequency Control f Oscillator Frequency SW Soft-Start t Regulator Enable to Regulated Soft-Start V Slew Rate SLEW OUT © 2009 Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 = 2.7V to 5.5V -40°C to +85°C, unless otherwise noted. Typical values are Conditions =1.2V LOAD OUT EN = GND V Rising IN V ...
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... Output Current (mA) LOAD Figure 5. Efficiency vs 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 2.7 3.2 3.7 Input Voltage(V) Figure 7. Shutdown Supply Current vs. V © 2009 Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 = 1.2V, circuit of Figure 1, and components per Table 1. OUT 100% 90% 80% 70% 60% 50% VIN = 3.3V 40% VIN = 5V 30% 20% 10% 1000 10000 1.2V LOAD OUT ...
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... Frequency (KHz) Figure 13. Power Supply Rejection Ratio © 2009 Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 = 1.2V, circuit of Figure 1, and components per Table 1. OUT Figure 10. Load Transient Response: 500mA 500mA, t 3.5 5VIN,1.2VOUT 3.0 3.3VIN,1.2VOUT 5VIN, 3.3VOUT 2.5 2.0 1 ...
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... Figure 17. Soft-Start: EN Pin Raised after 400mΩ 100μF, Horizontal Scale = LOAD OUT 100µs/div. © 2009 Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 = 1.2V, circuit of Figure 1, and components per Table 1. OUT =5.0V, Figure 16. Soft-Start: EN Pin Tied to VCC 5.0V, Figure 18. Soft-Start: EN Pin Tied to VCC 400mΩ ...
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... V IN Figure 19. VOUT to GND Short Circuit, 200µs/div. Figure 21. Over-Current at Startup: R 50µs/div. © 2009 Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 = 1.2V, circuit of Figure 1, and components per Table 1. OUT Figure 20. VOUT to GND Short Circuit, 5µs/div. = 200mΩ., LOAD Figure 22. Progressive Overload, 200µ ...
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... This limits the C capacitance when a heavy load is applied OUT during the startup. For a typical FAN5353 starting with a resistive load: μ ≈ − ...
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... OUT failing in a safe manner. For space-constrained applications, a lower current rating for L1 can be used. The FAN5353 may still protect these inductors in the event of a short circuit, but may not be able to protect the inductor from failure if the load is able to draw higher currents than the DC rating of the inductor. ...
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... VOUT COUT3 10μF 0805 © 2009 Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 and transient excursions. The inductor in this example is the TDK VLC5020T-R47N. VCC and VIN should be connected together by a thin trace some distance from the IC, or through a resistor (shown as R3 below), to isolate the switching spikes on PVIN from the IC bias supply on VCC ...
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... 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/. © 2009 Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 12 www.fairchildsemi.com ...
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... Fairchild Semiconductor Corporation FAN5353 • Rev. 1.0.2 13 www.fairchildsemi.com ...