PDF《36 V、1 A同步降压DC-DC调节器》

12 V,fSW =

300 kHz) ADP2441

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1 EFFICIENCY (%) LOAD (A) VIN = 5V VIN = 12V VIN = 24V VOUT = 3.3V fSW = 700kHz COILCRAFT MSS1038 10581-005 图7. 效率与负载电流的关系(VOUT = 3.3 V,fSW =

700 kHz)

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1 EFFICIENCY (%) LOAD (A) VIN = 12V 10581-007 VIN = 36V VOUT = 5V fSW = 700kHz COILCRAFT MSS1038 VIN = 24V 图8. 效率与负载电流的关系(VOUT =

5 V,fSW =

700 kHz)

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1 EFFICIENCY (%) LOAD (A) 10581-009 VOUT = 12V fSW = 600kHz COILCRAFT MSS1038 VIN = 24V VIN = 36V 图9. 效率与负载电流的关系(VOUT =

12 V,fSW =

600 kHz) Rev. B | Page

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0 0.2 0.4 0.6 0.8 1.0 V OUT ERROR (%) LOAD (A) VIN = 12V VIN = 24V VIN = 36V VOUT = 5V fSW = 700kHz 10581-010 图10. 不同电源下的负载调整率 C1.0 C0.8 C0.6 C0.4 C0.2

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0 0.2 0.4 0.6 0.8 1.0 V OUT ERROR (%) LOAD (A) TA = C40°C TA = +25°C TA = +125°C 10581-011 VIN = 24V VOUT = 5V fSW = 700kHz 图11. 不同温度下的负载调整率 C0.5 C0.4 C0.3 C0.2 C0.1

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37 V OUT ERROR (%) VIN (V) LOAD = 500mA LOAD = 1A 10581-012 VIN = 24V VOUT = 5V fSW = 700kHz 图12. 不同负载下的电压调整率,VOUT =

5 V

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40 P SKIP THRESHOLD LOAD CURRENT (mA) VIN (V) fSW = 300kHz fSW = 700kHz VOUT = 3.3V 10581-013 图13. 脉冲跳过阈值,VOUT = 3.3 V

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35 40 P SKIP THRESHOLD LOAD CURRENT (mA) VIN (V) fSW = 700kHz 10581-014 VOUT = 5V fSW = 300kHz 图14. 脉冲跳过阈值,VOUT ........