ACE1084 Datasheet, PDF (6/13 Pages) ACE Technology Co., LTD. – 5A Bipolar Linear Regulator

Block Diagram
ACE1084
5A Bipolar Linear Regulator
Detailed Description
ACE1084 is a series of low dropout voltage three terminal regulators. Its circuit has a trimmed
bandgap 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 Fig.4, as R1, R2 are the two
external resistors.)
Typical Application
ACE1084 has an adjustable version and fixed versions, Fig.4 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 CAdj should satisfy the following condition:
VER 1.4 6