ACE1084

5A Bipolar Linear Regulator

VER 1.4

6

Block Diagram

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: