ACE502

400mA CMOS Low Dropout Voltage Low consumption Regulator

VER 1.2

5

ACE502-3.3V

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Input Voltage

8

V

Output Voltage

3.234

3.3

3.366

V

Maximum Output Current

400

mA

200

400

Input-Output Voltage

Differential

Dropout

Voltage

400

600

mV

Line Regulation

0.2

0.3

%/V

Load Regulation

20

40

mA

Quiescent Current

Iq

7

10

uA

Output Noise

Noise

f=10Hz to 100kHz,

40

uVrms

Ripple Rejection

PSRR

60

dB

Output Voltage

Temperature Coefficient

50

ppm/℃

Typical Application Circuit

ACE502

Vin

Vin

Vout

Vout

GND

+

1uF

+

1uF

Cin

Cout

Application hints:

Note 1:Input capacitor (Cin=1uF) is recommended in all application circuit. Tantalum capacitor is recommended.

Note 2:Output capacitor (Cout=1uF) is recommended in all application to assure the stability of circuit. Tantalum

Explanation：

ACE502 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 400mA.

ACE502 uses trimming technique to assure the accuracy of output value within±2%, at the same time,

temperature compensated is elaborately considered in this chip, which makes ACE502 ’s temperature

coefficient within 50ppm/℃.