FAN53540 Fairchild Semiconductor, FAN53540 Datasheet
FAN53540
Related parts for FAN53540
FAN53540 Summary of contents
Page 1
... At higher loads, the system automatically switches to fixed-frequency control, operating at 2.4MHz. In shutdown mode, the supply current drops below 1µA, reducing power consumption. PFM mode can be disabled if constant frequency is desired. The FAN53540 is available in a 20-bump 1.96mm x 1.56mm Wafer-Level Chip-Scale Package (WLCSP). VIN 10 ...
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... TDK VLC5020T-R47M Vishay IHLP1616ABERR47M01 Notes the lesser current to produce 40 MAXDC 2. Inductor used for efficiency and temperature rise measurements. © 2011 Fairchild Semiconductor Corporation FAN53540 • Rev. 1.0.2 Vendor See Table 2 GRM21BR60J106M (Murata) C2012X5R0J106M (TDK) Any L (nH) DCR (mΩ) I MAXDC 470 19 6.0 470 20 5 ...
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... Analog Ground. All signals are referenced to this pin. Avoid routing high dV/dt AC currents through B4 AGND this pin. D1, D2, VIN Power Input Voltage. Connect to input power source. Connect to C E1, E2 D3, D4, SW Switching Node. Connect to inductor. E3, E4 © 2011 Fairchild Semiconductor Corporation FAN53540 • Rev. 1.0.2 FB VOUT ...
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... Junction-to-Ambient Thermal Resistance JA Note: 5. See Thermal Considerations in the Applications section. © 2011 Fairchild Semiconductor Corporation FAN53540 • Rev. 1.0.2 Parameter Tied without Series Impedance Tied through Series Resistance ≥100 Human Body Model per JESD22-A114 Charged Device Model per JESD22-C101 Min. ...
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... MODE Soft-Start and Output Discharge Regulator Enable to Regulated (Rising PGOOD) R Output Discharge Resistance DIS © 2011 Fairchild Semiconductor Corporation FAN53540 • Rev. 1.0.2 =2.7V to 5.5V, and T =-40°C to +85°C, unless otherwise noted. Typical values are Condition I =0, MODE=0 (AUTO PFM/PWM) LOAD I ...
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... Load Current (mA) Figure 6. Efficiency vs. I 100% 95% 90% 85% 80% 75% 0 1000 2000 Load Current (mA) Figure 8. Efficiency vs. I © 2011 Fairchild Semiconductor Corporation FAN53540 • Rev. 1.0.2 =1.2V, V =0V, T =25°C, circuit in Figure 1, and components per Table 1. OUT MODE A 95% 90% 85% 80% 2.7 VIN 75% 3.3 VIN 5.0 VIN 5 ...
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... Input Voltage (V) Figure 12. PFM / PWM Boundaries, 1. 1000 2000 Load Current (mA) Figure 14. Output Voltage Ripple © 2011 Fairchild Semiconductor Corporation FAN53540 • Rev. 1.0.2 =1.2V, V =0V, T =25°C, circuit in Figure 1, and components per Table 1. OUT MODE A 70 2.7 VIN 65 3.3 VIN 60 5.0 VIN 55 5.5 VIN ...
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... Frequency (Hz) Figure 18. Power Supply Rejection (PSRR) Figure 20. Line Transient, 50 Load, t © 2011 Fairchild Semiconductor Corporation FAN53540 • Rev. 1.0.2 =1.2V, V =0V, T =25°C, circuit in Figure 1, and components per Table 1. OUT MODE -40C +25C ...
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... R F Figure 24. Startup / Shutdown, No Load Figure 26. Overload Protection and Recovery © 2011 Fairchild Semiconductor Corporation FAN53540 • Rev. 1.0.2 =1.2V, V =0V, T =25°C, circuit in Figure 1, and components per Table 1. OUT MODE A Figure 23. Load Transient, 0.1-3.0A Load, Figure 25. Startup / Shutdown, 240m Load, C ...
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... Operation Description The FAN53540 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 FAN53540 is capable of delivering over 90% efficiency. The regulator operates at a nominal frequency of 2.4MHz at full load, which reduces the value of the external components to 470nH for the output inductor and 20µ ...
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... For space-constrained applications, a lower current rating for L1 can be used. The FAN53540 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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... Halving the copper thickness results in an increased For long term reliable temperature (T Maximum IC power loss is 2.88W. Figure 29 shows required power dissipation and derating for a FAN53540UC mounted on the Fairchild evaluation board in still air (38°C/W). 12 and C IN capacitors ...
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... DCR must be further reduced to accommodate the ~50°C temperature rise. 75 100 125 To meet the design requirements, an inductor with a room temperature DCR of <13.6mΩ is necessary. Figure 30 shows the maximum ambient temperature where FAN53540UC can be used for a continuous load (10 (11) ...
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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. © 2011 Fairchild Semiconductor Corporation FAN53540 • Rev. 1.0 ...
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... Fairchild Semiconductor Corporation FAN53540 • Rev. 1.0.2 15 www.fairchildsemi.com ...