NOT RECOMMENDED FOR NEW DESIGN
USE AP2127N/K/AP2125KS
PAM3103
300mA ADJUSTABLE HIGH PSRR CMOS LINEAR REGULATOR
Description
The PAM3103 is a positive, adjustable linear regulator. It features low
quiescent current (65µA typ.) and low dropout voltage, making it ideal
for battery powered applications. The output voltage is adjustable
from 1.2V through 5V. Its high PSRR makes it useful in applications
that require AC noise suppression on the input power supply. Space-
saving SOT23-5 and SOT353(SC70-5) packages are attractive for
portable and handheld applications. It has both thermal shutdown and
a current limit features to prevent device failure under extreme
operating conditions. It is stable with an output capacitor of 2.2µF or
greater.
Pin Assignments
Features
Low Dropout Voltage: 180mV@ 300mA ( V
O
= 3.3V)
Accuracy within ±2%
Quiescent Current: 65µA Typ.
High PSRR: 67dB@100Hz
Excellent Line/Load Regulation
Fast Response
Current Limiting
Short Circuit Protection
Low Temperature Coefficient
Shutdown Current: 0.5µA
Thermal Shutdown
Space Saving Packages SOT23-5 and SOT353(SC70-5)
Pb-Free Package
Applications
Cordless Phone
Cellular Phone
Bluetooth Earphone
Digital Camera
Portable Electronics
WLAN
MP3 Player
Typical Applications Circuit
V
O
= V
REF
*(R1+R2)/R2
PAM3103
Document number: DS36410 Rev. 2 - 3
1 of 11
www.diodes.com
May 2016
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AP2127N/K/AP2125KS
PAM3103
Pin Descriptions
Pin
Number
1
2
3
4
5
Pin
Name
VIN
GND
EN
ADJ
VOUT
Function
Input
Ground
Chip Enable (Active High)
Adjustable Pin
Output
Functional Block Diagram
Absolute Maximum Ratings
(@T
A
= +25° unless otherwise specified.)
C,
These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may
affect device reliability. All voltages are with respect to ground.
Parameter
Inout Voltage
Output Current
Output Pin Voltage
Lead Soldering Temperature
Storage Temperature
Rating
6.0
300
GND -0.3 to V
IN
+0.3V
300
-65 to +150
Unit
V
mA
V
°
C
°
C
PAM3103
Document number: DS36410 Rev. 2 - 3
2 of 11
www.diodes.com
May 2016
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AP2127N/K/AP2125KS
PAM3103
Recommended Operating Conditions
(@T
A
= +25° unless otherwise specified.)
C,
Parameter
Supply Voltage Range
Junction Temperature
Operation Temperature
Rating
2.5 to 5.5
-40 to +125
-40 to +85
°
C
Unit
V
Thermal Information
Parameter
Thermal Resistance Junction to Case)
Symbol
θ
JC
θ
JA
Package
SOT23-5
SOT353(SC70-5)
SOT23-5
SOT353(SC70-5)
SOT23-5
P
D
SOT353(SC70-5)
Max
130
TBD
250
300
400
300
mW
°
C/W
Unit
Thermal Resistance (Junction to Ambient)
Internal Power Dissipation
Electrical Characteristics
(@T
A
= +25° V
IN
= 4V, V
O
= 3V, C
IN
= 1µF, C
O
= 2.2µF, unless otherwise specified.)
C,
Parameter
Input Voltage
Output Voltage
Reference Voltage
Output Voltage Accuracy
Output Current
Short Circuit Current
Dropout Voltage
Ground Current
Quiescent Current
Line Regulation
Load Regulation
Temperature Coefficient
Over Temperature Shutdown
Over Temperature Hysteresis
Power Supply Ripple Rejection
Output Noise
EN Input High Threshold
EN Input Low Threshold
Shutdown Current
Notes:
Symbol
V
IN
V
O
V
REF
V
O
I
O
I
SC
V
DROP
I
GND
I
Q
LNR
LDR
T
C
OTS
OTH
PSRR
V
N
V
IH
V
IL
I
SD
—
—
—
I
O
= 1mA
—
V
O
= 0V
I
O
= 300mA
Test Conditions
Min
Note 1
1.2
—
-2
300
—
Typ
—
—
1.235
—
—
150
370
180
70
65
0.2
0.2
40
150
30
67
65
42
50
—
—
0.01
Max
5.5
5
—
2
Note 2
—
450
230
90
90
0.4
1
—
—
—
—
—
—
—
—
0.3
1
Units
V
V
V
%
mA
mA
mV
µA
µA
%/V
%
ppm/°
C
°
C
°
C
dB
dB
dB
µV
RMS
V
V
µA
2.5V ≤ V
O
< 3.3V
V
O
≥ 3.3V
—
—
—
—
-0.4
-1
—
—
—
I
O
= 1mA to 300mA
I
O
= 0mA
I
O
= 1mA, V
IN
= 3V to 5V
I
O
= 1mA to 300mA
—
I
O
= 1mA
I
O
= 1mA
I
O
= 100mA, V
O
= 1.2V
f = 10Hz to 100kHz
V
IN
2.5V to 5V
V
IN
2.5V to 5V
V
EN
= 0V
f = 100Hz
f = 1kHz
f = 10kHz
—
—
—
—
1.5
—
—
1. The minimum input voltage (V
IN(MIN
) of the PAM3103 is determined by output voltage and dropout voltage. The minimum input voltage is defined as:
V
IN(MIN)
= V
O
+V
DROP
V
IN(MIN)
= 2.5V
2. Output current is limited by P
D
, maximum I
O
= P
D
/(V
IN(MAX)
– V
O
).
PAM3103
Document number: DS36410 Rev. 2 - 3
3 of 11
www.diodes.com
May 2016
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AP2127N/K/AP2125KS
PAM3103
Typical Performance Characteristics
(@T
A
= +25° V
O
= 1.2V, C
IN
= 1µF, C
O
= 2.2µF, unless otherwise specified.)
C,
PAM3103
Document number: DS36410 Rev. 2 - 3
4 of 11
www.diodes.com
May 2016
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AP2127N/K/AP2125KS
PAM3103
Typical Performance Characteristics
(cont.)
PAM3103
Document number: DS36410 Rev. 2 - 3
5 of 11
www.diodes.com
May 2016
© Diodes Incorporated
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