FAN5361 Fairchild Semiconductor, FAN5361 Datasheet
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FAN5361
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FAN5361 Summary of contents
Page 1
... PFM mode can be disabled using the MODE pin. ® Data Cards The FAN5361 is available in 6-bump, 0.4mm pitch, Wafer- Level Chip-Scale Package (WLCSP) and a 6-lead 2 x 2mm ultra-thin MLP package (UMLP). Figure 1. Typical Applications June 2011 ...
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... >1.2V. Do not leave this pin floating VIN Input Voltage. Connect to input power source. © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1.2 Package (1) WLCSP-6, 0.4mm Pitch 6-Lead 2mm UMLP VIN EN GND Figure 3. WLCSP, Bumps Facing Up Figure 4. UMLP, Leads Facing Down Description ...
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... JEDEC standard JESD51. Special attention must be paid not to exceed junction temperature T given ambient temperate Symbol Junction-to-Ambient Thermal Resistance JA © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1.2 Parameter Human Body Model per JESD22-A114 Charged Device Model per JESD22-C101 Parameter Parameter 3 Min. Max. ...
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... Figure 14 and Figure 15 in Typical Performance Characteristics). OFF 4. Output voltage accuracy minimum: 1.862V for V 5. Refer to Operation Description and Typical Characteristics for closed-loop data. © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1 2.3V to 5.5V (AUTO Mode MODE = 25° ...
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... LOAD Figure 7. 1.233V Efficiency vs. Load Current OUT and Supply 1.84 1.83 1.82 1.81 1.80 0 100 200 300 Load Current (mA) Figure 9. Load Regulation © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1 (AUTO Mode 1.82V, T MODE OUT 100% 95% 90% 85% 80% Auto 2.3VIN 75% Auto 2.7VIN 70% 65% Auto 3.6VIN 60% Auto 4 ...
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... OUT Ripple 7 FPWM Mode 0.1 0.2 0.3 Load Current (A) Figure 15. 1.233V Effect of t OUT Switching Frequency © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1.2 (Continued (AUTO Mode 1.82V, T MODE OUT 100 1,000 0 Figure 12. 1.82V 7 FPWM Mode 3 ...
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... Always PFM 50 0 2.5 3.0 3.5 4.0 Input Voltage(V) Figure 17. 1.233V PFM / PWM Boundaries OUT 0.20 0.18 0.16 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0.00 © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1.2 (Continued (AUTO Mode 1.82V, T MODE OUT PFM border 32 PWM border 4.5 5.0 5.5 30 2.0 Figure 18. Quiescent Current vs. Input Voltage V =5. =0V EN ...
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... IN EN Figure 20. Line Transient 3.3V 50mA Load, 10µs/div. Figure 22. Combined Line/Load Transient 3.9 to 3.3V Combined with 40mA to 400mA Load Transient IN Figure 24. Load Transient 0 to 150mA, 2.5V © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1.2 (Continued (AUTO Mode 1.82V, T MODE OUT to 3.9V , Figure 21. Line Transient 3. Figure 23 ...
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... Figure 26. Load Transient 150 to 400mA, 2.5V Figure 28. Load Transient 50 to 250mA, 3.6V Figure 30. Load Transient 0 to 150mA, 4.5V Figure 32. Load Transient 150 to 400mA, 4.5V © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1.2 (Continued (AUTO Mode 1.82V, T MODE OUT Figure 27. Load Transient 0 to 150mA, 3.6V IN Figure 29 ...
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... Figure 33. Metallic Short Applied at V Figure 35. Over-Current Fault Response 1Ω, 50μs/div. LOAD Figure 37. Overload Recovery to Light Load, 50μs/div. © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1.2 (Continued (AUTO Mode 1.82V, T MODE OUT , 50μs/div. Figure 34. Metallic Short Applied at V OUT Figure 36 ...
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... Typical Performance Characteristics Unless otherwise noted 3.6V Figure 39. SW-Node Jitter (Infinite Persistence), I Figure 40. Power Supply Rejection Ratio at 300mA Load © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1.2 (Continued (AUTO Mode 1.82V, T MODE OUT LOAD 11 = 25° 200mA, 50ns/div. www.fairchildsemi.com ...
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... Enable and Soft-Start When EN is LOW, all circuits in FAN5361 are off and the IC draws ~50nA of current. When EN is HIGH and V its UVLO threshold, the regulator begins a soft-start cycle. The output ramp during soft-start is a fixed slew rate of 50mV/s from then 12.5mV/ ...
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... Minimum Off-Time Effect on Switching Frequency t is 50ns. This imposes constraints on the maximum OFF(MIN) V OUT that the FAN5361 can provide, or the maximum V IN output voltage it can provide at low V fixed switching frequency in PWM mode. © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1.2 When V ...
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... I I DCM 2 The FAN5361 is optimized for operation with L = 470nH, but is stable with inductances up to 1.2H (nominal 2.2H(nominal) may be used; however, in that case greater than or equal to 2.7V. The inductor should be rated to maintain at least 80% of its value at I 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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... There are only three external components: the inductor and the input and output capacitors. For any buck switcher IC, including the FAN5361 important to place a low-ESR input capacitor very close to the IC, as shown in Figure 41. The input capacitor ensures good input decoupling, which ...
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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/. © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1 0.03 C ...
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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/. © 2008 Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1 2.0 0.50 ...
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... Fairchild Semiconductor Corporation FAN5361 • Rev. 1.1.2 18 www.fairchildsemi.com ...