ACE1084_17 Datasheet, PDF (6/13 Pages) ACE Technology Co., LTD. – 1A Bipolar Linear Regulator

ACE1084
1A Bipolar Linear Regulator
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 (C_Adj) 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 C_Adj 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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