Advanced Power
Electronics Corp.
APE8805
600mA LOW DROPOUT LINEAR
REGULATOR
Features
●
Low Dropout Voltage of 600mV at 600mA
●
Guaranteed 600mA Output Current
●
Very Low Quiescent Current at about 30uA
●
Max.
±
2%Output Accuracy
●
Needs Only 1µF Capacitor for Stability
●
Thermal Shutdown Protection
●
Current Limit Protection
●
Low-ESR Ceramic Capacitor for Output Stability
●
RoHS Compliant
Description
The APE8805 series are low dropout, positive
linear regulators with very low quiescent current.
The APE8805 can supply 600mA output current
with a low dropout voltage at about 600mV.
The APE8805 regulator is able to operate with
output capacitors as small as 1µF for stability.
Other than the current limit protection APE8805
also offers on chip thermal shutdown feature
providing protection against overload or any
condition when the ambient temperature exceeds
the junction temperature.
The APE8805 series are available in fixed output
voltage ranging from 1.8 volt , 2.5 volt and 3.3 volt.
The APE8805 series are available in space-saving
SOT-23, SOT-89, and SOT-223 packages.
Applications
●
DVD/CD-ROMs, CD/RWs
●
Wireless Devices
●
LCD Modules
●
Battery Power Systems
●
Card Readers
●
XDSL Routers
Typical Application Circuit
VIN
APE8805
1µF
C
IN
1µF
C
OUT
VOUT
GND
Figure 1. Typical Application Circuit of APE8805
Note：To prevent oscillation, it is recommended to use minimum 1µF X7R or X5R dielectric capacitors if ceramics are
used as input/output capacitors.
Data and specifications subject to change without notice.
200427062-1/9
Advanced Power
Electronics Corp.
Ordering Information
APE8805
□
-
□
Output Voltage
18: 1.8V
25: 2.5V
33: 3.3V
Package Type
N: SOT-23
G: SOT-89
GR: SOT-89
K: SOT-223
APE8805
Pin Assignments
SOT-23(N)
3
1
2
TOP VIEW
1. GND
2. VOUT
3. VIN
SOT-89(G)
TOP VIEW
1. GND
2. VIN
3. VOUT
1
2
3
SOT-89(GR)
TOP VIEW
1. VOUT
2. GND
3. VIN
1
2
3
Note：The devices are available in fixed voltages range of
SOT-223(K)
1.8V , 2.5V& 3.3V. Please consult
APEC sales office or
authorized distributor for availability of special output
voltages.
1
2
3
TOP VIEW
1. VOUT
2. GND
3. VIN
Fig
ure 2. Pin Assignment of APE8805
Absolute Maximum Ratings
Parameter
Supply Input Voltage
Maximum Junction Temperature
Power Dissipation SOT-23
Power Dissipation SOT-89
Power Dissipation SOT-223
Package Thermal Resistance SOT-23
Package Thermal Resistance SOT-89
Package Thermal Resistance SOT-223
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
Symbol
V
IN
T
J
P
D
P
D
P
D
θ
JA
θ
JA
θ
JA
T
S
T
LEAD
-65
Min
Max
6
150
0.4
0.57
0.74
250
175
135
150
260
Unit
V
ºC
W
W
W
°C/W
°C/W
°C/W
ºC
ºC
Note：Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device.
2/9
Advanced Power
Electronics Corp.
Recommended Operating Conditions
Parameter
Input Voltage
Operating Junction Temperature Range
Symbol
V
IN
T
J
Min
2.8
-40
Max
5.5
125
APE8805
Unit
V
ºC
Electrical Characteristics
(V
IN
=V
OUT
+1V or V
IN
=2.8V whichever is greater, C
IN
=1µF, C
OUT
=1µF, T
A
=25 ºC, unless otherwise specified)
Parameter
Output Voltage Accuracy
Current Limit
Quiescent Current
Symbol
∆V
OUT
I
LIMIT
I
Q
V
DROP
∆V
LINE
∆V
LOAD
PSRR
TC
TSD
∆TSD
I
O
= 1mA
R
Load
=1Ω
I
O
= 0mA
1.2V
≤
V
OUT
≤
2.0V
Dropout Voltage (Note 1)
I
O
=600mA
2.0V < V
OUT
≤
2.8V
2.8V < V
OUT
≤
4.5V
Line Regulation
Load Regulation (Note 2)
Ripple Rejection
Temperature Coefficient
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
I
O
=1mA, V
IN
=V
OUT
+1V to 5V
I
O
=0mA to 600mA
V
IN
=V
OUT
+1V
f
RIPPLE
= 120Hz, C
OUT
= 1µF
I
OUT
= 1mA, V
IN
= 5V
Conditions
Min
-2
600
30
1400
800
600
1
13
60
50
160
25
5
50
mV
mV
dB
ppm/ ºC
ºC
ºC
mV
50
Typ
Max
+2
Unit
%
mA
µA
Note 1：The dropout voltage is defined as V
IN
-V
OUT
, which is measured when V
OUT
drop about 100mV.
Note 2：Regulation is measured at a constant junction temperature by using 40ms current pulse and load regulation in the load range from
0mA to 600mA.
Functional Pin Description
Pin Name
VIN
Pin Function
Power is supplied to this device from this pin which is required an input filter capacitor. In general, the input
capacitor in the range of 1µF to 10µF is sufficient.
The output supplies power to loads. The output capacitor is required to prevent output voltage unstable. The
APE8805 is stable with an output capacitor 1µF or greater. The larger output capacitor will be required for
application with large transit load to limit peak voltage transits, besides could reduce output noise, improve
stability, PSRR.
Common ground pin
VOUT
GND
3/9
Advanced Power
Electronics Corp.
Block Diagram
VIN
RSEN
PMOS
APE8805
VOUT
Current
Limit
Error
Amp
+
R1
_
Thermal
Shutdown
Vref 1.2V
R2
GND
Figure 3. Block Diagram of APE8805
Application Information
The APE8805 series are low dropout linear
regulators that could provide 600mA output
current at dropout voltage about 600mV. Besides,
current limit and on chip thermal shutdown
features provide protection against any
combination of overload or ambient temperature
that could exceed junction temperature.
1.Output and Input Capacitor
The APE8805 regulator is designed to be stable
with a wide range of output capacitors. The
ESR of the output capacitor affects stability.
Larger value of the output capacitor decreases
the peak deviations and provides to improve
transition response for larger current changes.
The capacitor types (aluminum, ceramic, and
tant- alum) have different characterizations
such as temperature and voltage coefficients.
All ceramic capacitors are manufactured with a
variety of dielectrics, each with different
behavior across temperature and applications.
Common dielectrics used are X5R, X7R and
Y5V. It is recommended to use 1uF to 10uF X5R
or X7R dielectric ceramic capacitors with 30mΩ
Ω
to 50mΩ ESR range betw- een device outputs
Ω
to ground for transient stability. The APE8805
is designed to be stable with low ESR ceramic
capacitors and higher values of capacitors and
ESR could improve output stability. So the
ESR of output capacitor is very important
beca- use it generates a zero to provide
phase lead for loop stability.
There are no requirements for the ESR on
the input capacitor, but its voltage and
temperature
coefficient
have
to
be
considered
for
device
application
environment.
2.Protection Features
In order to prevent overloading or thermal
cond- ition from damaging device, APE8805
regulator has internal thermal and current
limiting functions designed to protect the
device. It will rapidly shut off PMOS pass
element during overloading or over
temperature condition.
3.Thermal Consideration
The power handling capability of the device
will be limited by maximum operation
junction temp- erature (125°C). The power
°
dissipated by the device will be estimated by
PD = IOUT
×
(VIN-VOUT). The power
dissipation should be lower than the
maximum power dissipation listed in
“Absolute Maximum Ratings” section.
4/9
Advanced Power
Electronics Corp.
Typical Performance Curves
50
APE8805
50
Quiescent Current (uA)
Vout=1.8V
Cin=1uF
Cout=1uF
Vout=3.3V
Cin=1uF
Cout=1uF
45
Quiescent Current (uA)
45
40
40
35
35
30
30
3.0
3.5
4.0
4.5
5.0
5.5
6.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage(V)
Figure 4. Quiescent Current vs. Input Voltage
650
Figure 5. Quiescent Current vs. Input Voltage
850
Vout=1.8V
Cin=1uF
Cout=1uF
700
800
Vout=3.3V
Cin=1uF
Cout=1uF
Current Limit(mA)
750
Current Limit(mA)
3.0
3.5
4.0
4.5
5.0
5.5
6.0
750
800
700
850
650
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage(V)
Input Voltage(V)
Figure 6. Current limit vs. Input Voltage
850
Figure 7. Current Limit vs. Input Voltage
850
800
Vin=5V
Vout=1.8V
Cin=1uF
Cout=1uF
800
Vin=5V
Vout=3.3V
Cin=1uF
Cout=1uF
Current Limit(mA)
Current Limit(mA)
750
750
700
700
650
-25
0
25
50
0
650
75
100
125
-25
0
25
50
0
75
100
125
Temperature( C)
Temperature( C)
Figure 8. Current limit vs. Temperature
Figure 9. Current limit vs. Temperature
5/9
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