ACE521

250mA CMOS Low consumption Linear Regulator

VER 1.4

4

Electrical Characteristics

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Input Voltage

16

V

Output Voltage

Vout*0.98

Vout*1.02

V

Maximum Output

Current

250

mA

Input-Output Voltage

Differential

Dropout

Voltage

Vout≦2.5V

600

1,000

mV

Vout≧2.5V

300

600

Line Regulation

ΔV

ΔV

0.2

0.3

%/V

Load Regulation

ΔV

OUT

20

40

mV

Quiescent Current

Iq

2.0

5.0

uA

Output Voltage

Temperature

Coefficient

ΔV

ΔT•V

OUT

100

ppm/

℃

Block Diagram

Explanation

ACE521 is a series of low dropout voltage and low power consumption three pins regulator. Its

application circuit is very simple, which only needs two outside capacitors. It is composed of these

modules: high accuracy voltage reference, current limit circuit, error amplifier, output driver and power

transistor.

Current Limit module can keep chip and power system away from danger when load current is more

than 250mA.

ACE521 uses trimming technique to assure the accuracy of output value within±2%, at the same time,

temperature compensation is elaborately considered in this chip, which makes ACE521

’s temperature

coefficient within 100ppm/℃。