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FAN5601 데이터시트(PDF) 11 Page - Fairchild Semiconductor |
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FAN5601 데이터시트(HTML) 11 Page - Fairchild Semiconductor |
11 / 15 page 11 www.fairchildsemi.com FAN5601 Rev. 1.0.5 Shutdown, UVLO, Short Circuit Current Limit and Thermal Shutdown The device has an active-low shutdown pin to decrease supply current to less than 1 µA. In shutdown mode the supply is dis- connected from the output. UVLO triggers when supply voltage drops below 2V. When the output voltage is lower than 150mV, a short circuit protection is triggered. In this mode 15 out of 16 pulses during the switching will be skipped and the supply cur- rent is limited. Thermal shutdown triggers at 150°C. Switch Configuration Applications Information Proper operation of the FAN5601 requires one ceramic bucket capacitor in the 0.1µF to 1µF range; one 10µF output bypass capacitor and one 10µF input bypass capacitor. In order to obtain optimum output ripple and noise performance, use of low ESR (<0.05 Ω) ceramic input and output bypass capacitors is recommended. The X5R and X7R rated capacitors provide ade- quate performance over the -40°C to 85°C temperature range. The value of the bucket capacitor is dependent on load current requirements. A 1µF bucket capacitor will work well in all appli- cations at all load currents, while a 0.1µF capacitor will support most applications under 100mA of load current. The choice of bucket capacitor values should be verified in the actual applica- tion at the lowest input voltage and highest load current. A 30% margin of safety is recommended in order to account for the tol- erance of the bucket capacitor and the variations in the on-resis- tance of the internal switches. S1 S2 S3 S4 V IN GND C+ VOUT C- C OUT 2:1 configuration Switches in charging phase Reverse all switches for pumping phase C B S1 S3 S4 V IN GND C+ VOUT C- C OUT 1:1 configuration Switch 3 is always off and Switch 4 is always on Switches 1 and 2 are in phase 1 Reverse the position of switches 1&2 for phase 2 C B S2 Figure 2. (A) Figure 2. (B) |
유사한 부품 번호 - FAN5601_05 |
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유사한 설명 - FAN5601_05 |
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