ACE509

Low noise, fast response 500mA LDO regulator

VER 1.2 4

PSRR

Ripple Rejection

F=100Hz,

Ripple=0.5Vp-p

Vin=Set Vout+1V

65

dB

Ilim

Short Current Limit

Vout=0V

200

mA

Rpd

CE

Pull

down

Resistance

2.0

5.0

10.0

M

Ω

Vceh

CE Input Voltage “H”

1.5

Vin

V

Vcel

CE Input Voltage “L”

0

0.25

V

en

Output Noise

BW=10Hz~100kHz

47

uVrms

Vdrop=Vin1-(Vout2*0.98) Vout2 is the output voltage when Vin=Vout1+1.0V and Iout=300mA or Iout=500mA.

Vin1 is the input voltage at which the output voltage becomes 98% of Vout1 after gradually decreasing the input voltage.

Typical Application Circuit

CE

In

ACE509

Out

+

Cap

GND

+

Cap

Application hints:

Note1:Input capacitor (Cin=1uF) is recommended in all application circuit.

Note2:Output capacitor (Cout=3.3uF/4.7uF) is recommended in all application to assure the stability of

circuit.

Explanation：

ACE509 series is a group of positive voltage output, low noise, low power consumption, low dropout

voltage regulator.

ACE509 can provide output value in the range of 1.2V~4.5V every 0.1V step. It also can be customized

on command.

ACE509 includes high accuracy voltage reference, error amplifier, current limit circuit and output driver

module.

ACE509 has excellent load and line transient response and good temperature characteristics, which can

assure the stability of chip and power system. And it uses trimming technique to guarantee output voltage

accuracy within±2%.