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FAN5631 Scheda tecnica(PDF) 2 Page - Fairchild Semiconductor |
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FAN5631 Scheda tecnica(HTML) 2 Page - Fairchild Semiconductor |
2 / 11 page 2 www.fairchildsemi.com FAN5631/FAN5632 Rev. 1.0.2 Typical Application Pin Assignment Figure 3. Pin Assignment Pin Description Pin No. Pin Name Pin Description 1VSEL Output Voltage Select Logic Input Pin. The VSEL pin can not be left floating and must be connected to either a logic high or logic low level. FAN5631: If a logic low is applied to the VSEL pin then VOUT is 1.2V. If a logic high is applied then VOUT is 1.5V. FAN5632: If a logic low is applied to the VSEL pin, the efficiency optimization mode is enabled, and the output voltage accuracy is relaxed in order to meet optimum efficiency. However, if a logic high is applied, the device will operate like a typical charge pump converter. 2EN Enable Input Pin. If a logic high is applied to the EN pin, the device is enabled. However, if a logic low is applied, the device is disabled and the supply current is reduced to less than 1µA. The EN pin can not be left floating and must be connected to either a logic high or logic low level. 3CB+ Bucket Capacitor Positive Pin. 4 GND Ground Pin. This pin is connected to the internal MOSFET switches. This pin must be externally connected to GND. 5CB- Bucket Capacitor Negative Pin. 6VOUT Output Voltage Pin. 7NC Not Connected. This pin is not internally connected. 8NC Not Connected. This pin is not internally connected. 9VIN Supply Voltage Input. 10 NC Not Connected. This pin is not internally connected. 40 50 60 70 80 90 FAN5631 FAN5632 with optimization 1:1 Mode 2:1 Mode Average Efficiency (over VIN = 2.7V to 5V) = 66%, With optimization = 77% Average Efficiency (over VIN = 2.7V to 4.2V) = 67%, With optimization = 84% Input Voltage (V) VSEL EN VOUT = 1.2V to 1.5V VIN = 2.7V to 5.5V COUT 10 µF CIN 10 µF NC NC NC CB+ CB- GND 10 9 6 7 8 1 2 3 4 5 ON OFF VIN VOUT NC NC NC CB+ CB- GND VSEL EN 10 9 6 7 8 1 2 3 4 5 3x3mm 10-Lead MLP Top View Figure 2. Typical Efficiency Graph Figure 1. Typical Application |
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