AP2129
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
Description
The AP2129 is a 300mA, positive Voltage regulator ICs fabricated by
CMOS process. The AP2129 provides two kinds of output voltage
operation modes for setting the output voltage. Fixed output voltage
mode senses the output voltage on V
OUT
, adjustable output voltage
mode needs two resistors as a voltage divider.
Pin Assignments
(Top View)
Pin 1 Mark
V
IN
1
2
3
6
5
4
V
OUT
NC
NC
The AP2129 series have features of low dropout voltage, low noise,
high output voltage accuracy, and low current consumption which
make them ideal for use in various battery-powered devices.
The AP2129 has 1.0V, 1.2V, 1.8V, 2.6V, 2.8V, 3.0V and 3.3V fixed
voltage version and 0.8V to 4.5V adjustable voltage version.
The AP2129 series are available in DFN-1.5x2-6 (1.0V, 1.2V, 1.8V,
2.6V, 2.8V, 3.0V, 3.3V) and SOT-23-5 (1.0V, 1.2V, 3.3V, ADJ)
packages.
GND
Shutdown
DFN-1.5x2-6
(Top View)
Features
Wide Operating Voltage: 1.8V to 6V
High Output Voltage Accuracy: ±2%
High Ripple Rejection: 65dB@ f = 1kHz, 45dB@ f = 10kHz
Low Standby Current: 0.1µA
Low Quiescent Current: 60µA Typical
Low Output Noise: 60µVrms
Short Current Limit: 50mA
Over Temperature Protection
Compatible with Low ESR Ceramic Capacitor: 1µF for C
IN
and
C
OUT
Excellent Line/Load Regulation
Soft Start Time: 50µs
Auto Discharge Resistance: R
DS(ON)
= 60
Shutdown
GND
V
IN
1
2
3
SOT-23-5
5
ADJ/NC
4
V
OUT
Applications
Datacom
Notebook Computers
Mother Board
AP2129
Document number: DS41213 Rev. 2 - 2
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July 2018
© Diodes Incorporated
AP2129
Typical Applications Circuit
V
IN
V
IN
V
OUT
V
OUT
AP2129
R1
Shutdown
GND
ADJ
R2
C
IN
1F
C
OUT
1F
V
OUT
=0.8*(1+R1/R2)V
V
IN
V
IN
V
OUT
V
OUT
AP2129
Shutdown
GND
C
OUT
1F
C
IN
1F
V
OUT
=1.0V, 1.2V, 1.8V, 2.6V, 2.8V, 3.0V, 3.3V
Pin Descriptions
Pin Number
Pin Name
DFN-1.5x2-6
1
2
3
4, 5
—
6
SOT-23-5
3
2
1
—
5
4
V
IN
GND
Shutdown
NC
ADJ/NC
V
OUT
Input Voltage
Ground
Active High Enable Input Pin. Logic high=enable, logic low=shutdown
No Connection
Adjust Output for ADJ version/ No Connection for Fixed Version
Regulated Output Voltage
Function
AP2129
Document number: DS41213 Rev. 2 - 2
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July 2018
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AP2129
Functional Block Diagram
3
Shutdown
1
V
IN
UVLO &
Shutdown
Logic
Thermal
Shutdown
Foldback
Current Limit
6
V
OUT
3MΩ
4, 5
V
REF
2
GND
NC
1
Shutdown
UVLO &
Shutdown
Logic
3
V
IN
Thermal
Shutdown
Foldback
Current Limit
4
V
OUT
3MΩ
5
ADJ
V
REF
GND
2
AP2129
Document number: DS41213 Rev. 2 - 2
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July 2018
© Diodes Incorporated
AP2129
Absolute Maximum Ratings
(Note 1)
Symbol
V
IN
V
CE
I
OUT
T
J
T
STG
T
LEAD
θ
JA
Input Voltage
Shutdown Input Voltage
Output Current
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
DFN-1.5x2-6
Thermal Resistance (Junction to Ambient)
SOT-23-5
ESD
ESD
Note 1:
Parameter
Rating
6.5
-0.3 to V
IN
+0.3
450
+150
-65 to +150
+260
100
Unit
V
V
mA
°
C
°
C
°
C
°
C/W
250
6000
200
V
V
ESD (Human Body Model)
ESD (Machine Model)
Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Symbol
V
IN
T
A
Input Voltage
Operating Ambient Temperature Range
Parameter
Min
1.8
-40
Max
6
+85
Unit
V
°
C
AP2129
Document number: DS41213 Rev. 2 - 2
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July 2018
© Diodes Incorporated
AP2129
Electrical Characteristics
AP2129-1.0/1.2/1.8/2.6/2.8/3.0/3.3 Electrical Characteristics
40°
T
J
+85° unless otherwise specified.)
C
C,
(@C
IN
=1µF, C
OUT
= 1µF,
Bold
type applies over -
Symbol
V
OUT
V
IN
I
OUT(MAX)
∆V
OUT
/(∆I
OUT
*V
OUT
)
∆V
OUT
/(∆V
IN
*V
OUT
)
Parameter
Output Voltage
Input Voltage
Maximum Output
Current
Load Regulation
Line Regulation
Conditions
V
IN
= V
OUT
+1V, (Note 2)
1mA
I
OUT
300mA
—
—
V
IN
-V
OUT
= 1V, (Note 2), 1mA
I
OUT
300mA
V
OUT
+0.5V
V
IN
6V, (Note 2), I
OUT
=
30mA
V
OUT
= 1.0V, I
OUT
= 300mA
V
OUT
= 1.2V, I
OUT
= 300mA
Min
98%*
V
OUT
1.8
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.5
0
—
—
—
—
—
—
Typ
—
—
450
—
—
800
600
600
170
60
0.1
65
65
45
±100
400
50
50
60
—
—
60
3
+165
+30
20
150
Max
102%*
V
OUT
6
—
1.5
0.06
—
—
700
300
90
1.0
—
—
—
—
—
—
—
—
6
0.4
—
—
—
—
—
Unit
V
V
mA
%/A
%/V
V
DROP
Dropout Voltage
V
OUT
= 1.8V, I
OUT
= 300mA
V
OUT
= 2.6V/2.8V/3.0V/3.3V, I
OUT
=
300mA
mV
I
Q
I
STD
Quiescent Current
Standby Current
V
IN
= V
OUT
+1V, I
OUT
= 0mA
V
IN
= V
OUT
+1V, V
Shutdown
in off mode
f = 100Hz
µA
µA
dB
dB
dB
ppm/°
C
mA
mA
µs
µVrms
V
V
M
°
C
°
C
PSRR
Power Supply
Rejection Ratio
Output Voltage
Temperature Coefficient
Output Current Limit
Short Current Limit
Soft Start Time
RMS Output Noise
Shutdown "High"
Voltage
Shutdown "Low" Voltage
V
OUT
Discharge
MOSFET R
DS(ON)
Shutdown Pull Down
Resistance
Thermal Shutdown
Thermal Shutdown
Hysteresis
Thermal Resistance
Ripple 1Vp-p,
V
IN
= V
OUT
+1V
f = 1kHz
f = 10kHz
(∆V
OUT
/V
OUT
)
/∆T
I
LIMIT
I
SHORT
t
UP
V
NOISE
—
—
—
—
—
—
I
OUT
= 30mA, -40°
T
J
+85°
C
C
V
IN
-V
OUT
= 1V, V
OUT
= 0.98*V
OUT
V
OUT
= 0V
—
T
A
= +25° 10Hz
f
100kHz
C,
Shutdown Input Voltage "High"
Shutdown Input Voltage "Low"
Shutdown Input Voltage "Low"
—
—
—
DFN-1.5x2-6
SOT-23-5
θ
JC
Note 2:
°
C/W
—
V
IN
= 2.8V for 1.0 and 1.2 version.
AP2129
Document number: DS41213 Rev. 2 - 2
5 of 13
www.diodes.com
July 2018
© Diodes Incorporated
