FAN5665 Fairchild Semiconductor, FAN5665 Datasheet
FAN5665
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FAN5665 Summary of contents
Page 1
... DC/DC converter with an input voltage range from 2.9V to 5.5V. Switch reconfiguration and fractional switching techniques are utilized to achieve high efficiency over the entire input voltage range. The FAN5665 includes built-in under-voltage lockout, short circuit, and thermal protection circuitry. The FAN5665 is available in an 8-bump 0.4mm pitch WLCSP package. C1- GND C1 0.22µF ...
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... VOUT Regulated 5V output. C2 C2+ Bucket capacitor 2. Connect this pin to the positive terminal of the bucket (flying) capacitor. C3 C2- Bucket capacitor 2. Connect this pin to the negative terminal of the bucket (flying) capacitor. © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 Figure 2. Pin Configuration 2 www.fairchildsemi.com ...
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... Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with four-layer boards in accordance with JESD51- JEDEC standard. Special attention must be paid not to exceed maximum junction temperature (T © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 Parameter Parameter Min. ...
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... Voltage Accuracy OUT V Output Voltage Ripple OUT_RIPPLE I Short-Circuit Current Limit SC TSD Thermal Shutdown Timing f Internal Oscillator Frequency OSC t Soft-start ss Note: 2. Guaranteed by design. © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 = 2.2µ OUT = 25° 3.6V Conditions 3.6V 0mA IN OUT V = 5.5V 0mA IN OUT ...
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... Temperature (°C) Figure 5. Light-Load Switching Frequency vs. Temperature 250 200 150 100 50 0 2.9 3.4 3.9 Input Voltage (V) Figure 7. Quiescent Current vs. Input Voltage © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 = 2.2µ 0.22µF, T OUT 1.2163 I =2mA OUT 1.2042 1.1921 1.1800 4.4 4.9 Figure 4. Heavy-Load Switching Frequency 1.34 1.32 1 ...
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... I =1mA 5.08 OUT 5.06 I =20mA OUT 5.04 5.02 5.00 4.98 4.96 -40 -15 10 Temperature (°C) Figure 13. Output Voltage vs. Temperature 2.9 3.4 3.9 Input Voltage (V) Figure 15. Efficiency vs. Input Voltage © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 (Continued) = 2.2µ 0.22µF, T OUT 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4. 5.08 5.06 5.04 5.02 5.00 4.98 4.96 4.94 I =30mA OUT 4.92 - Figure 12. ...
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... Mode Figure 19. Load Transient from 0 to 30mA in 1.5× Mode Figure 21. Load Transient from 0 to 20mA in 2× Mode © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 (Continued) = 2.2µ 0.22µ 25°C. OUT A Figure 18. Load Transient from 30 to 0mA Figure 20 ...
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... Figure 23. Load Transient from 4 to 8mA in 2× Mode Figure 25. Start- OUT Figure 27. Start- OUT © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 (Continued) = 2.2µ 0.22µF, T OUT Figure 24. Load Transient from 8 to 4mA in 2× Mode = 30mA in 1× Mode Figure 26. Turn-off 30mA in 1.5× ...
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... Figure 29. Start- OUT Figure 31. Input and Output Ripple 1.5× Mode Figure 33. Input and Output Ripple 2× Mode © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 (Continued) = 2.2µ 0.22µF, T OUT = 30mA in 2× Mode Figure 30. Turn-off 30mA Figure 32 ...
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... Typical Performance Characteristics Unless otherwise noted 2.2µ Figure 35. Input and Output Ripple 1.5× Mode Figure 37. Line Transient 600mV Rising © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 (Continued) = 2.2µ 0.22µ 25°C. OUT A = 2mA Figure 36. Input and Output Ripple at I OUT Figure 38 ...
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... Soft-start At power-up, the device has 0.5ms soft-start to control the inrush current and make the output ramp up slowly. Modes of Operation FAN5665 has 1×, 1.5×, and 2× modes. Input voltage is compared with reference to determine mode. © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 Figure 39 ...
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... Vendor Increasing Output Current Capability Murata Two parallel FAN5665s increase the output current. In such a configuration, the VIN, VOUT, GND, and EN pins of each IC should be connected together, but the respective C1 and C2 pins must be kept separate. Separate local input and output bypassing / decoupling Murata may be required to reduce output noise and ripple ...
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... Applications Information LED Driver The FAN5665 can be configured as an LED driver, as shown in Figure 41. The constant current is generated by putting a resistor in series with the LED. The value of series resistor is dictated by the current through the LED. The maximum current that the FAN5665 can deliver is 30mA. The number of parallel branches and current through LEDs should be chosen according to the maximum output current ...
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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/ © 2007 Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0 1.210 +/- 0.030mm 14 ...
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... Fairchild Semiconductor Corporation FAN5665 • Rev. 1.0.1 15 www.fairchildsemi.com ...