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LM317AL-AA3-R 데이터시트(PDF) 4 Page - E-Tech Electronics LTD |
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LM317AL-AA3-R 데이터시트(HTML) 4 Page - E-Tech Electronics LTD |
4 / 5 page LM317A LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 4 of 5 www.unisonic.com.tw QW-R101-026.E APPLICATION CIRCUITS 1 2 3 VOUT R1 R2 VIN C1 0.1μF Co 1μF I ADJ UTC LM317A VOUT=1.25V×(1+R2/R1)+IADJ×R2 C1 is required when regulator is located an appreciated distance from power supply. Co is needed to improve transient response. 1 2 3 VOUT VIN D1 1N4002 720Ω 120Ω 1kΩ 1μF TTL Level signal UTC LM317A Fig.1 Programmable voltage regulator Fig.2 Regulator with On-off control mA 100 < I < mA 5 2 R + 1 R V 25 . 1 = I + ) 2 R + 1 R V ( = I 1 R V 25 . 1 = I + ) 1 R V ( = I OUT ADJ REF ) MIN ( O ADJ REF ) MAX ( O Fig.3 Soft Start Application Fig.4 Constant Current Application |
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