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Similaire à LDOの等価回路の考察
Similaire à LDOの等価回路の考察 (20)
Plus de Tsuyoshi Horigome
Plus de Tsuyoshi Horigome (20)
Dernier
Dernier (20)
LDOの等価回路の考察
- 1. U1 AD817/AD + 3 - 2 V+ 7 V- 4 OUT 6 Q1 Q2SA562 Q2 Q2SC1815 CC 100p R1 10k R2 3.15789k ESR 0.01 RL 1k V1 6.5 V2 1.2Vdc Cf f 1 50p 0 0 0 0 0 0 C_ELE 4.7u ESL 10nH 1 2 V3 15Vdc V4 -15Vdc 0 0 C_IN 4.7u 0 Ro 4.865m R3 950k LDO VV LDOの等価回路の考察 1
- 2. 2
- 3. U1 AD817/AD + 3 - 2 V+ 7 V- 4 OUT 6 Q1 Q2SA562 Q2 Q2SC1815 CC 100p R1 10k R2 3.15789k ESR 0.01 V1 6.5 V2 1.2Vdc Cf f 1 50p 00 00 0 C_ELE 4.7u ESL 10nH 1 2 V3 15Vdc V4 -15Vdc 00 C_IN 4.7u 0 Ro 4.865m R3 950k LDO Output Impedance I1 100mAdc Rsence 10 R5 470 V5 1Vac 0Vdc 0 0 OUT V Ro=4.865m[Ω] 3
- 5. U1 AD817/AD + 3 - 2 V+ 7 V- 4 OUT 6 Q1 Q2SA562 Q2 Q2SC1815 CC 100p R1 10k R2 3.15789k ESR 0.01 V1 6.5 V2 1.2Vdc Cf f 1 50p 00 00 0 C_ELE 4.7u ESL 10nH 1 2 V3 15Vdc V4 -15Vdc 00 C_IN 4.7u 0 Ro 10m R3 950k LDO Output Impedance I1 100mAdc Rsence 10 R5 470 V5 1Vac 0Vdc 0 0 OUT V Ro=10m[Ω] 5
- 6. Ro=10m[Ω] 6
- 7. V U1 AD817/AD + 3 - 2 V+ 7 V- 4 OUT 6 Q1 Q2SA562 Q2 Q2SC1815 CC 100p R1 10k R2 3.15789k ESR 0.01 V1 6.5 V2 1.2Vdc Cf f 1 50p 00 00 0 C_ELE 4.7u ESL 10nH 1 2 V3 15Vdc V4 -15Vdc 00 C_IN 4.7u 0 Ro 100m R3 950k LDO Output Impedance I1 100mAdc Rsence 10 R5 470 V5 1Vac 0Vdc 0 0 OUT Ro=100m[Ω] 7
- 8. Ro=100m[Ω] 8
- 9. V U1 AD817/AD + 3 - 2 V+ 7 V- 4 OUT 6 Q1 Q2SA562 Q2 Q2SC1815 CC 100p R1 10k R2 3.15789k ESR 0.01 V1 6.5 V2 1.2Vdc Cf f 50p 00 00 0 C_ELE 4.7u ESL 10nH 1 2 V3 15Vdc V4 -15Vdc 00 C_IN 4.7u 0 Ro 4.865m R3 950k LDO Output Impedance I1 100mAdc Rsence 10 R5 470 V5 1Vac 0Vdc 0 0 OUT Cff=50p[F] 9
- 10. Cff=50p[F] 10
- 11. V U1 AD817/AD + 3 - 2 V+ 7 V- 4 OUT 6 Q1 Q2SA562 Q2 Q2SC1815 CC 100p R1 10k R2 3.15789k ESR 0.01 V1 6.5 V2 1.2Vdc Cf f 10p 00 00 0 C_ELE 4.7u ESL 10nH 1 2 V3 15Vdc V4 -15Vdc 00 C_IN 4.7u 0 Ro 4.865m R3 950k LDO Output Impedance I1 100mAdc Rsence 10 R5 470 V5 1Vac 0Vdc 0 0 OUT Cff=10p[F] 11
- 12. Cff=10p[F] 12
- 13. V U1 AD817/AD + 3 - 2 V+ 7 V- 4 OUT 6 Q1 Q2SA562 Q2 Q2SC1815 CC 100p R1 10k R2 3.15789k ESR 0.01 V1 6.5 V2 1.2Vdc Cf f 100p 00 00 0 C_ELE 4.7u ESL 10nH 1 2 V3 15Vdc V4 -15Vdc 00 C_IN 4.7u 0 Ro 4.865m R3 950k LDO Output Impedance I1 100mAdc Rsence 10 R5 470 V5 1Vac 0Vdc 0 0 OUT Cff=100p[F] 13
- 14. Cff=100p[F] 14
- 16. Add R4=50[Ω] 16
- 17. Add R4=500[Ω] R4 500 V U1 AD817/AD + 3 - 2 V+ 7 V- 4 OUT 6 Q1 Q2SA562 Q2 Q2SC1815 CC 100p R1 10k R2 3.15789k ESR 0.01 V1 6.5 V2 1.2Vdc Cf f 50p 0 0 00 0 C_ELE 4.7u ESL 10nH 1 2 V3 15Vdc V4 -15Vdc 00 C_IN 4.7u 0 Ro 4.865m R3 950k LDO Output Impedance I1 100mAdc Rsence 10 R5 470 V5 1Vac 0Vdc 0 0 OUT 17
- 18. Add R4=500[Ω] 18
- 19. R4 50 V U1 AD817/AD + 3 - 2 V+ 7 V- 4 OUT 6 Q1 Q2SA562 Q2 Q2SC1815 CC 100p R1 10k R2 3.15789k ESR 0.01 V1 6.5 V2 1.2Vdc Cf f 50p 0 0 0 0 0 C_ELE 4.7u ESL 10nH 1 2 V3 15Vdc V4 -15Vdc 0 0 C_IN 4.7u 0 Ro 4.865m R3 950k LDO Output Impedance I1 100mAdc Rsence 10 R5 470 V5 1Vac 0Vdc 0 0 OUT 19
- 20. 20