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FAN5361UC15X Datasheet(PDF) 6 Page - Fairchild Semiconductor |
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FAN5361UC15X Datasheet(HTML) 6 Page - Fairchild Semiconductor |
6 / 17 page © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5361 • Rev. 1.0.0 6 Typical Performance Characteristics (Continued) Unless otherwise noted, VIN = VEN = 3.6V, VMODE = 0V, VOUT = 1.82V, TA = 25°C. 5 10 15 20 25 30 35 40 45 50 0 0.1 0.2 0.3 0.4 0.5 0.6 VIN=2.5V VIN=3.6V VIN=5.5V ILOAD Output Current (A) COUT=4.7μF nom. 0 5 10 15 20 25 30 35 40 45 0 0.1 0.2 0.3 0.4 0.5 0.6 ILOAD Output Current (A) 2.5VIN 3.6VIN 5.5VIN VOUT=1.2V COUT=4.7µF nom. Figure 11. Peak-to-Peak Output Voltage Ripple Figure 12. 1.2VOUT Peak-to-Peak Output Voltage Ripple 0 1 2 3 4 5 6 7 0 0.1 0.20.3 0.40.5 0.6 Load Current (A) VIN>2.4V VIN=2.3V VOUT=1.2V Figure 13. Effect of tOFF(MIN) on Switching Frequency Figure 14. 1.2VOUT Effect of tOFF(MIN) on Switching Frequency 0 50 100 150 200 250 300 350 2.53.0 3.54.0 4.55.0 5.5 Input Voltage (V) PFM Border PWM Borde The switching mode changes at these borders Always PFM Always PWM 0 50 100 150 200 250 300 350 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) PFM border PWM border The switching mode changes at these borders Always PWM Always PFM Figure 15. PFM / PWM Boundaries Figure 16. 1.2VOUT PFM / PWM Boundaries |
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