ACE509
Technology
Description
Low noise, fast response 500mA LDO regulator
ACE509 series is a group of positive voltage output, 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 with discharge capability.
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%.
Features
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Low Power Consumption: 75uA（Typ.）
Low output noise (47uVRMS)
Standby Mode: 0.1uA
Low dropout Voltage: 0.46V@500mA (Typ.)
High Ripple Rejection: 66dB@100Hz (Typ.)
Low Temperature Coefficient:
±100ppm/°C
Excellent Line regulation: 0.05%/V
Build-in chip enable and discharge circuit
Output Voltage Range: 1.2V~4.5V (customized on command every 0.1V step)
Highly Accurate:
±2%
(±1% customized)
Output Current Limit
Application
Power source for cellular phones and various kind of PCSs
Battery Powered equipment
Power Management of MP3, PDA, DSC, Mouse, PS2 Games
Reference Voltage Source
Regulation after Switching Power
Typical Performance Characteristic:
ACE509-2.8V Output
I load (mA)
VER 1.2
1
ACE509
Technology
Absolute Maximum Ratings
Parameter
Input Voltage
Output Current
Power Dissipation
SOT-23-5
SOT-23-3
SOT-89-3
TO-92
Junction temperature
Storage temperature
Symbol
Low noise, fast response 500mA LDO regulator
Max
10
500
250
200
500
350
125
- 45 to 150
Unit
V
mA
mW
O
T
J
T
S
C
O
C
Packaging Type
SOT-23-5
5
4
SOT-23-3
3
SOT-89-3
TO-92
1
2
3
1
2
1
2
3
123
Pin
V
OUT
V
DD
V
SS
CE
NC
SOT-23-5
5
1
2
3
4
SOT-23-3
2
3
1
SOT-89-3(A)
1
3
2
SOT-89-3(B)
3
2
1
TO-92
3
1
2
Function
Output pin
Input Pin
Ground Pin
Chip Enable Pin
No Connection
Ordering information
Selection Guide
ACE509 XX XX + H
Halogen - free
Pb - free
BN: SOT-23-5
BM: SOT-23-3
AMA: SOT-89-3A
AMB: SOT-89-3B
EP: TO-92
Output Voltage：
1.2V/1.5V…..4.5V
VER 1.2 2
ACE509
Technology
Block Diagram
Low noise, fast response 500mA LDO regulator
Recommended Work Conditions
Item
Input Voltage Range
Ambient Temperature
Min Recommended Max Unit
8
V
-40
85
℃
Electrical Characteristics
(Test Conditions: Cin=1uF, Cout=3.4uF,T
A
=25℃, unless otherwise specified.)
ACE509, for arbitrary output voltage
Symbol
Parameter
Vin
Input Voltage
Vout
Iout (Max.)
Output Voltage
Maximun Output
Current
Dropout
Voltage,Vout≥2.8V
Line Regulation
Load Regulation
Supply Current
Supply Current
(Srandby)
Output Voltage
Temperature
Coefficiency
Conditions
Vin=Set Vout+1V
1mA≤Iout≤30mA
Vin-Vout=1V
Iout=100mA
Iout=300mA
Iout=500mA
Iout=40mA
2.8V≤Vin≤8V
Vin=Set Vout+1V
1mA≤Iout≤500mA
Vin=Set Vout+1V
Vin=Set Vout+1V
Vce=GND
Iout=30mA
Min
Vout
x0.98
500
Typ
Vout1
Max
8
Vout
X1.02
Units
V
V
mA
88
270
460
0.05
20
75
0.1
±100
120
350
600
0.2
40
90
1.0
mV
mV
mV
%/V
mV
uA
uA
ppm/°C
Vdrop
1
△Vout/△Vin·Vout
△Vout/△Iout
Iss
Istandby
△Vout/△T·Vout
VER 1.2 3
ACE509
Technology
Low noise, fast response 500mA LDO regulator
F=100Hz,
Ripple=0.5Vp-p
Vin=Set Vout+1V
Vout=0V
2.0
1.5
0
BW=10Hz~100kHz
47
PSRR
Ilim
Rpd
Vceh
Vcel
en
Ripple Rejection
Short Current Limit
CE
Pull
down
Resistance
CE Input Voltage “H”
CE Input Voltage “L”
Output Noise
65
200
5.0
10.0
Vin
0.25
dB
mA
MΩ
V
V
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
In
V
DD
+
Cap
CE
ACE509
V
OUT
GND
+
Cap
Out
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%.
VER 1.2 4
ACE509
Technology
Typical Performance Characteristics
1.Output Voltage vs. Output Current
(with output short protection)
Low noise, fast response 500mA LDO regulator
2.Output Voltage vs. Input Voltage
I load(mA)
Vin(V)
3.Droput Voltage vs. Output Current
4.Ripple rejection vs. Frequency
I load(mA)
Freq(kHz)
5.Line transient response
VER 1.2 5
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