FAN5350 Fairchild Semiconductor, FAN5350 Datasheet
FAN5350
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FAN5350 Summary of contents
Page 1
... Using a proprietary architecture with FAN5350 is capable of delivering 600mA at over 90% efficiency, while maintaining a very high efficiency of over 80% at load currents as low as 1mA. The regulator operates at a nominal fixed frequency of 3MHz at full load, which reduces the value of the external components to 1µ ...
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... C IN VIN GND Figure 1. WLCSP, Bumps Facing Down Block Diagram Bias EN 1.8V Reference FB © 2007 Fairchild Semiconductor Corporation FAN5350 Rev. 1.0 1µH 4.7µF V OUT C OUT 4.7µF C OUT Current Limit + Modulator Logic - 3MHz OSC Zero Crossing Figure 3. Block Diagram ...
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... Enable Pin. The device is in shutdown mode when voltage to this pin is <0.4V and enabled 4 EN when >1.2V. Do not leave this pin floating Switching Node. Connection to the internal PFET switch and NFET synchronous rectifier Power Supply Input. IN © 2007 Fairchild Semiconductor Corporation FAN5350 Rev. 1.0.5 GND SW FB Figure 5. WLCSP - Bumps Facing Up PGND VIN AGND SW ...
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... Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with four-layer 1s2p boards in accordance to JESD51- JEDEC standard. Special attention must be paid not to exceed junction temperature T © 2007 Fairchild Semiconductor Corporation FAN5350 Rev. 1.0.5 Parameter Human Body Model Charged Device Model ...
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... Thermal Shutdown TSD T Thermal Shutdown Hysteresis HYS Note: 2. The Electrical Characteristics table reflects open-loop data. Refer to Operation Description and Typical Characteristic for closed-loop data. © 2007 Fairchild Semiconductor Corporation FAN5350 Rev. 1.0.5 = 2.7V to 5.5V -40°C to +85° 25°C, V =3.6V Conditions Device is not switching, EN=V ...
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... Fairchild Semiconductor Corporation FAN5350 Rev. 1.0.5 Enable and Soft Start Maintaining the EN pin LOW keeps the FAN5350 in non-switching mode in which all circuits are off and the 90% efficiency, while part draws ~50nA of current ...
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... I Δ DCM 2 The FAN5350 is optimized for operation with L=1μH, but is stable with inductances ranging from 700nH to 3.0μH. The inductor should be rated to maintain at least 80% of its value LIM(PK) Efficiency is affected by the inductor DCR and inductance value. Decreasing the inductor value for a given physical size typically decreases the DCR ...
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... FAN5350 always important to place a low-ESR input capacitor very close to the IC, as shown in Figure 7. That ensures good input decoupling, which helps reduce the noise appearing at the output terminals and Table 2. FAN5350 Evaluation Board Bill of Materials (optional parts are installed by request only) Description 1.2μH, 1.8A, 55mΩ Inductor 1.3μ ...
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... V =3.6V IN 0.50 0. 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 Load Current (A) Figure 12. DC Current Voltage Output Characteristics © 2007 Fairchild Semiconductor Corporation FAN5350 Rev. 1.0.5 , according to the circuit in Figure 1 or Figure 2, unless otherwise specified. 1850 1840 +85°C 1830 +25°C 1820 1810 -40°C 1800 1790 4.0 4.5 5.0 5.5 Figure 9. Load Regulation, Increasing Load ...
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... Ambient Temperature (°C) Figure 16. PMOS Current Limit in Closed Loop 85dB 5dB /div 35dB 1Hz 10Hz Figure 18. Power Supply Rejection Ratio in CCM © 2007 Fairchild Semiconductor Corporation FAN5350 Rev. 1.0.5 (Continued) , according to the circuit in Figure 1 or Figure 2, unless otherwise specified. 100 V =2. ...
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... H scale: 20µs / div. Figure 20. Startup, Full Load H scale: 1µs / div. Figure 22. Fast Load Transient, No Load to Full Load H scale: 20µs / div. Figure 24. Fast Load Transient in CCM © 2007 Fairchild Semiconductor Corporation FAN5350 Rev. 1.0.5 (Continued) , according to the circuit in Figure 1 or Figure 2, unless otherwise specified 0.5A / div ...
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... Figure 28. Line Transient, 600mV, 50mA Load Figure 30. Combined Line (600mV) and Load (100mA to 350mA) Transient Response H scale: 1µs / div. Figure 31. Typical Waveforms in DCM, 50mA Load © 2007 Fairchild Semiconductor Corporation FAN5350 Rev. 1.0.5 (Continued) , according to the circuit in Figure 1 or Figure 2, unless otherwise specified div. ...
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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 FAN5350 Rev. 1.0.5 3 3.0 ...
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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 FAN5350 Rev. 1.0.5 (Ø0.25 PAD D (0 ...
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... Fairchild Semiconductor Corporation FAN5350 Rev. 1.0.5 15 www.fairchildsemi.com ...