Diodes PAM3101 User Manual
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300mA HIGH PSRR LOW-DROPOUT CMOS LINEAR REGULATOR
Description
The PAM3101 series of positive voltage linear regulators feature low
quiescent current (65µA typ.) and low dropout voltage, making them
ideal for battery powered applications. Their high PSRR make them
useful in applications where AC noise on the input power supply must
be suppressed. Space-saving TSOT25, SOT-23, SOT-89, SC70 and
DFN1.6x1.6-6L packages are attractive for portable and handheld
applications. They have both thermal shutdown and current limit
features to prevernt device failure from extreme operating conditions.
They are stable with an output capacitor of 2.2µF or greater.
Features
Low Dropout Voltage: 180mV@300mA (VO = 3.3V)
Output Voltage Accuracy within ±2%
Supply Voltage Range: 2.5V to 5.5V
Quiescent Current: 65µA typ.
High PSRR: 70dB@1kHz
Excellent Line and Regulation
Fast Discharge
Current Limiting
Short Circuit Protection
Low Temperature Coefficient
Shutdown Current: 0.5µA
Thermal Shutdown
Space Saving Packages: TSOT25, SOT-23, SOT-89, SC70 and
DFN1.6x1.6
Pb-Free Packages
Applications
Pin Assignments
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PAM3101
Top View
TSOT25
Cellular Phones
Bluetooth Earphones
Digital Cameras
Portable Electronics
WLANs
MP3 Players
PAM3101
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Typical Applications Circuit
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PAM3101
Pin Configuration and Description
Package
Type
SOT23-3
TSOT25
SOT89-3
SOT89-5
SC-70-3L
SC70-4L
SC70-5L
DFN1.6x1.6-6L
Pin Name Function
VIN Input
GND Ground
VOUT Output
EN
BYP Bypass Pin, need a 10nF capacitor connect to GND
NC No Connection
1 2 3 4 5 6
GND
VIN
VOUT
VIN
VIN
GND
VOUT
VOUT
VIN
EN
VIN
EN
Chip Enable (active high)
PAM3101BABXXX----EN default floating
Other part no----EN default pull high
VOUT VIN — — —
VOUT GND — — —
GND VIN — — —
GND EN BYP VOUT —
GND EN NC VOUT —
VIN VOUT — — —
GND VIN — — —
GND NC EN VIN —
VOUT GND — — —
GND VOUT VIN — —
GND EN BYP VOUT —
NC VIN VOUT NC GND
Pin Number
PAM3101
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Functional Block Diagram
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PAM3101
Absolute Maximum Ratings (@T
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 Rating Unit
Input Voltage 6.0 V
Output Current 300 mA
Output Pin Voltage
Lead Soldering Temperature 300, (5sec) °C
Storage Temperature -65 to +150 °C
ESD Rating Class B
= +25°C, unless otherwise specified.)
A
GND -0.3 to V
+0.3V
IN
Recommended Operating Conditions (@T
Parameter Rating Unit
Supply Voltage Range 2.5 to 5.5 V
Junction Temperature -40 to +125
Operation Temperature -40 to +85
PAM3101
Document number: DSxxxxx Rev. 2 - 5
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V
= +25°C, unless otherwise specified.)
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°C
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PAM3101
Thermal Information
Parameter Symbol Package Max Unit
TSOT25/SOT23 130
Thermal Resistance Junction to Case)
Thermal Resistance (Junction to Ambient)
θ
JC
θ
JA
Internal Power Dissipation (@TA = 25°C) PD
Electrical Characteristics (@T
= +25°C, V
A
CE1
= V
Parameter Symbol Test Conditions Min Typ Max Units
Input Voltage
Output Voltage
V
V
Output Current
Dropout Voltage
Ground Current
V
I
DROP
GND
Quiescent Current
Line Regulation LNR
IN
IO = 1mA
O
300 Note 2 mA
I
O
IO = 300mA
IO = 1mA to 300mA
I
IO = 0mA
Q
I
= 1mA, VO < 2V, VIN = 2.8V to 3.8V
O
IO = 1mA, 2V ≤ VO < 3.3V, VIN = VO +0.5V to VO +1V
IO = 1mA, VO ≥ 3.3V, VIN = VO +0.5V to VO +1V
I
= 1mA to 300mA, VO ≥ 2V
Load Regulation LDR
Temperature Coefficient
T
Over Temperature Shutdown OTS
Over Temperature Hysteresis OTH
Power Supply Ripple Rejection PSRR
Output Noise
CE Input High Threshold
CE Input Low Threshold
Shutdown Current
Notes: 1. The minimym inout voltage (V
V
2. Output current is limited by P
IN(MIN)
= VO +V
DROP
V
V
V
I
SD
IN(MIN
, maximum IO = PD/(V
D
O
IO = 1mA to 300mA, VO < 2V
IO = 1mA
C
I
= 1mA
O
I
= 1mA
O
= 100mA
I
O
C
= 10nF
BYP
= 3.3V
V
O
f = 10Hz to 100kHz, C
N
VIN = 2.5V to 5V
TH
VIN = 2.5V to 5V
TL
VEN = 0V
) of the PAM3101 is determined by output voltage and dropout voltage. The minimum input voltage is defined as:
IN(MAX)
PAM3101
Document number: DSxxxxx Rev. 2 - 5
SOT-89 100
SC70 160
DFN1.6x1.6 65
TSOT25/SOT23 250
°C/W
SOT-89 180
SC70 300
DFN1.6x1.6 175
TSOT25/SOT23 400
SOT-89 550
SC70 300
mW
DFN1.6x1.6 570
= VIN = VO +1V, CIN = 2.2µF, CO = 2.2µF, unless otherwise specified.)
CE2
Note 1 5.5 V
-2 +2 %
= 1.5V
V
O
VO = 1.8V
2.5V ≤ VO < 3.3V
VO ≥ 3.3V
1150 1400
850 1100
370 450
180 230
70 90 µA
65 90 µA
-0.15 0.10 0.15
-0.10 0.03 0.10
-0.4 0.2 0.4
-2 1 +2 %
30 60 mV
40 ppm/°C
150 °C
30 °C
f = 100Hz 70
f = 1kHz 65
BYP
= 10nF
50
1.5 V
0.3 V
0.01 1 µA
– VO).
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mV
%/V
dB
µV
RMS
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Typical Performance Characteristics
(@TA = +25°C, VEN = VIN, CIN = 1µF, CO = 2.2µF, C
= 10nF unless otherwise specified.)
BYP
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PAM3101
PAM3101
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Typical Performance Characteristics (cont.)
(@TA = +25°C, VEN = VIN, CIN = 1µF, CO = 2.2µF, C
= 10nF unless otherwise specified.)
BYP
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PAM3101
PAM3101
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Typical Performance Characteristics (cont.)
(@TA = +25°C, VEN = VIN, CIN = 1µF, CO = 2.2µF, C
= 10nF unless otherwise specified.)
BYP
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PAM3101
PAM3101
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Typical Performance Characteristics (cont.)
(@TA = +25°C, VEN = VIN, CIN = 1µF, CO = 2.2µF, C
= 10nF unless otherwise specified.)
BYP
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PAM3101
PAM3101
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