ACE511
Technology
Description
500mA LDO Linear Voltage Regulator
The ACE511 series is a low-drop-out ( LDO ) linear regulator. The devices have been optimized for
applications where fast transient response and minimum input voltages are critical.
At light loads the typical dropout voltage is 10mV, and at full load the maximum dropout voltage is less
than 500mV. The internal over-current protection and thermal protection ,makes the device extremely
easy to use in a wide range of applications.
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Features
Low dropout performance
Output current of 500mA typical
Thermal shutdown protection
Fixed 1.5V/1.8V/2.5V/2.8V/3.0V/3.3V/3.6V output voltages available
SOT-89-3, and SOT-23-3 packages available
Application
Active SCSI terminators
Battery chargers
High efficiency linear regulators
Wireless communication systems
Digital camera
Absolute Maximum Ratings
Parameter
Input supply voltage
Thermal resistance junction to ambient
SOT-89-3
SOT-23-3
Junction temperature
Storage temperature range
Lead temperature (soldering) 10sec
into, negative out of the specified terminal.
Symbol
V
IN
θ
JA
T
J
T
STG
T
LEAD
Max
6
Unit
V
O
C/W
180
230
O
150
C
O
- 10 to 150
C
O
260
C
Note : Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive
VER 1.2
1
ACE511
Technology
Packaging Type
SOT-89-3
ACE5111XXAM+
1
2
1
2
3
3
V
OUT
GND
V
IN
500mA LDO Linear Voltage Regulator
ACE5112XXAM+
1
2
3
GND
V
IN
V
OUT
SOT-23-3
3
ACE5111XXBM+
1
2
1
2
3
V
OUT
V
IN
GND
ACE5112XXBM+
1
2
3
GND
V
OUT
V
IN
Ordering information
Selection Guide
ACE511 X XX XX + H
Halogen - free
Pb - free
AM : SOT-89-3
BM : SOT-23-3
Output Voltage：
1.5V/1.8V/2.5V/2.8V/3.0V/3.3V/3.6V
Pin
VER 1.2
2
ACE511
Technology
Power Dissipation Table
θ
Package
O JA
( C /W )
AM
180
BM
230
T
A
≤
25
O
C
Power rating(mW)
694
543
500mA LDO Linear Voltage Regulator
T
A
=70
O
C
Power rating(mW)
444
348
T
A
= 85
O
C
Power rating (mW)
361
283
Note:
1.Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator
will go into Thermal shutdown.
2.T
J
: Junction Temperature Calculation T
J
= T
A
+ ( P
D
x
θ
JA
)
The
θ
JA
numbers are guidelines for the thermal performance of the device/PC-board system. All of the above
assume no Ambient airflow.
3.θ
JA
: Thermal Resistance-Junction to Ambient, D
F
: Derating factor, Po: Power consumption
Recommended Operating Conditions
Parameter
Input Voltage
Load Current
(with adequate heat sinking)
Junction temperature Range
Symbol
V
IN
I
O
T
J
Operating Conditions
Min.
2.8
5
125
Typ.
Max.
5.5
Unit
V
mA
O
C
VER 1.2
3
ACE511
Technology
Electrical Characteristics
500mA LDO Linear Voltage Regulator
Operating Conditions: V
IN
= 5V, I
OUT
=10mA; T
J
=25
℃,unless
otherwise specified.(C
OUT
=2.2uF, ,C
IN
=2.2 uF)
Parameter
Symbol
Test Conditions
ACE511-1.5 (V
IN
=3.3V)
ACE511-1.8 (V
IN
=3.3V)
ACE511-2.5
ACE511-2.8
ACE511-3.0
ACE511-3.3
ACE511-3.6
V
IN
=(V
OUT
+1)V to 5.5V
V
IN
=(V
OUT
+1)V
I
OUT
=10~250mA
I
OUT
=10~500mA
Min
1.470
1.764
2.450
2.744
2.940
3.234
3.528
Typ Max
1.5
1.8
2.5
2.8
3.0
3.3
3.6
1
1
1.5
65
0.8
0.7
50
150
20
0.003
51
1.530
1.836
2.550
2.856
3.060
3.366
3.672
Unit
Output Voltage
V
OUT
V
Line Regulation
Load Regulation (2)
Ground Current
Dropout Voltage (3)
Current Limit
Output Voltage Temperature Coefficient
Thermal Protection
RMS Output Noise
Ripple Rejection Ratio
Notes:
V
SR
V
LR
I
GND
V
D
I
LIMIT
T
C
T
PRO
V
N
PSRR
%
%
uA
V
A
ppm/℃
O
I
OUT
=10mA
I
OUT
=500mA
V
OUT
=0V
Note 1
Thermal protection temperature
Protection Hysterisys
T
A
=25
O
C,,10H
Z
≤f≤10KH
Z,
f = 120H
z,
C,
%/V
O
dB
1. Output voltage temperature coefficient is the worst case voltage change divided by the total temperature range.
2. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load
regulation in the load range from 100μA to 500mA. Changes in output voltage due to heating effects are covered by the
thermal regulation specification.
3. Dropout voltages is defined as the input to output differential at which the output voltage drops 2% below its nominal value
measured at 1V differential.
VER 1.2
4
ACE511
Technology
Typical
Applications
500mA LDO Linear Voltage Regulator
Fix Voltage Regulator:
ACE511X-XX
V
IN
+1uF
Cin
Vin
GND
+1uF
Cout
Vout
V
OUT
Application Note
1.Output voltage temperature coefficient is the worst case voltage change divided by the total
temperature range.
Load Regulator
Load transient response
Output Current (mA)
Quiescent Current vs I
OUT
Time (250us/Div)
Output Current (mA)
VER 1.2
5
Analog electronics
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