ACE522

36V Input Linear Regulator

VER 1.1

5

Explanation

ACE522 is a series of low dropout voltage and low power consumption regulator. Its application circuit is

very simple, which only needs two outside capacitors.

We have to take heat dissipation into great consideration when voltage of input is high. Because in such

cases, the power dissipation consumed by ACE522 is very large. ACE522 uses SOT-89-3 package type

and its thermal resistance is about 20°C/W. And the copper area of application board can affect the total

thermal resistance. If copper area is 5cm*5cm (two sides), the resistance is about 30°C/W. So the total

thermal resistance is about 20°C/W + 30°C/W. We can decrease total thermal resistance by increasing

copper area in application board. When there is no good heat dissipation copper are in PCB, the total

thermal resistance will be as high as 120°C/W, then the power dissipation of ACE522 could allow on itself

is less than 1W. And furthermore, ACE522 will work at junction temperature higher than 125°C under

such condition and no lifetime is guaranteed.

Typical Performance Characteristics