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ACE1084 Datasheet(PDF) 6 Page - ACE Technology Co., LTD. |
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ACE1084 Datasheet(HTML) 6 Page - ACE Technology Co., LTD. |
6 / 13 page ACE1084 1A Bipolar Linear Regulator VER 1.2 6 Detailed Description ACE1084 is a series of low dropout voltage three terminal regulators. Its circuit has a trimmed band gap reference to ensure output voltage accuracy independent of temperature variance. On-chip thermal shutdown provides protection against overload and conditions as elevated ambient temperature. Its application circuitry requires minimum number of external components. Both fixed voltage and adjustable voltage versions need input and output capacitors to assure output voltage stability. Any desired output voltage from 1.25V to 10V can be achieved with adjustable version by assigning proper values to two external resistors in its application circuitry (as shown in Figure.1, as R1, R2 are the two external resistors.). Typical Application ACE1084 has an adjustable version and fixed versions, Figure.1 shows their typical application circuitry. A 10uF tan capacitor connected between input and GND as bypass capacitor and a 22uF tan capacitor between output and GND are recommended for all application. Using a bypass capacitor (CAdj) between the adjust terminal and ground can improve ripple rejection. The bypass capacitor prevents ripple from being amplified in case the output voltage is increased. The impedance of CAdj should be less than the resistance of R1 to prevent ripple from being amplified at any frequency. As R1 is normally in the range of 120Ω~200Ω, the value of C Adj should satisfy the following condition: 1/(2π* Frequency Ripple *Cadj)<R1 A 10µF tan capacitor is recommended. Figure1. Typical Application of ACE1084 |
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