PAM3110
1.5A Low Dropout Voltage CMOS Regulator
Features
n
Output Current: Up to 1.5A
n
Output Voltages:1.2V, 1.5V,1.8V, 2.5V, 3.3V
and 5.0V
n
Stable with a Ceramic Output Capacitor
n
Dropout Voltage: 400mV@1.5A
n
Low Quiescent Current
n
Over Temperature Shutdown
n
Short Circuit Protection
n
Low Temperature Coefficient
n
Pb-Free Package
General Description
The PAM3110 is a 1.5A CMOS LDO regulator that
features a low quiescent current and low dropout
voltages, as well as over temperature shutdown.
The fixed output voltage of the PAM3110 is set at
the factory and trimmed to ±1.5%. The PAM3110
is stable with a ceramic output capacitor of 4.7
μ
F
or higher.
This family of regulators can provide either a
stand-alone power supply solution or act as a
post regulator for switch mode power supplies.
They are particularly suitable for applications
requiring low input and output voltages.
PAM3110 is available in SOT-223,TO-252 and
TO-263-2L package.
Applications
n
DSP, FPGA and Microprocessor Power
Supplies
n
SATA Power Supply
n
LCD TV/Monitors
n
Wireless Devices
n
Communication Devices
n
Portable Electronics
n
Post Regulator for SMPS
Typical Application Circuit
V
IN
VIN
VOUT
Block Diagram
IN
OUT
V
O
PAM3110
C
IN
4.7μF
GND
Over Current
Shut do wn
C
OUT
4.7
μ
F
Thermal
Shut down
R1
AMP
R2
GND
Power Analog Microelectronics
,
Inc
www.poweranalog.com
1
06/2011 Rev2.2
PAM3110
1.5A Low Dropout Voltage CMOS Regulator
Pin Configuration & Marking Information
Top View
SOT-223
TAB:GND
Top View
SOT-223
TAB:VOUT
P3110V
AXXYW
1
2
3
PAM3110ABAXXXR
P3110V
BXXYW
1
2
3
PAM3110BBAXXXR
V
:
Voltage Code
X
:
Internal Code
Y
:
Year
W
:
Week
TAB:VOUT
Top View
TO-252
TAB:GND
Top View
TO-252
P3110V
AXXYW
2
PAM3110ALAXXXR
P3110V
BXXYW
2
PAM3110BLAXXXR
1
3
1
3
Top View
TO-263-2L
TAB:GND
Top View
TO-263-2L
TAB:VOUT
P3110V
AXXYW
2
PAM3110AMBXXXR
P3110V
BXXYW
2
PAM3110BMBXXXR
1
3
1
3
Power Analog Microelectronics
,
Inc
www.poweranalog.com
2
06/2011 Rev2.2
PAM3110
1.5A Low Dropout Voltage CMOS Regulator
Absolute Maximum Ratings
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
.
Input Voltage...............................................6V
Storage Temperature ....................- 65
°
to 150
°
C
C
Maximum Junction Temperature.................. 150
°
C
Lead Soldering Temperature (5sec)........... 300
°
C
Recommended Operating Conditions
Supply Voltage Range.......................2.5V to 5.5V
Ambient Temperature Range...........-40
°
to 85
°
C
C
Junction Temperature Range........-40
°
to 125
°
C
C
Thermal Information
Parameter
Thermal Resistance (Junction to Case)
Symbol
θ
JC
Package
SOT-223
TO-252
TO-263
SOT-223
Thermal Resistance (Junction to Ambient)
θ
JA
TO-252
TO-263
SOT-223
Internal Power Dissipation
@TA=25°
C
P
D
TO-252
TO-263
Maximum
7
7
7
160
90
60
625
1200
2000
mW
Unit
°
C/W
Power Analog Microelectronics
,
Inc
www.poweranalog.com
3
06/2011 Rev2.2
PAM3110
1.5A Low Dropout Voltage CMOS Regulator
Electrical Characteristic
V
IN
=V
O
+0.5V, T
A
=25° C
IN
=4.7
μ
F, C
OUT
=4.7
μ
F, unless otherwise noted.
C,
Parameters
Input Voltage Range
Output Voltage Accuracy
Dropout Voltage
Short Circuit Current
Quiescent Current
Current Limit
Symbol Test Conditions
V
IN
V
O
V
DROP
I
SC
I
Q
I
LIM
V
O
≤
2.5V
,
Io=10mA
Line Regulation
LNR
V
IN
=Vo+1.5V to Vo+2.5V
V
O
> 2.5V
,
I
O
=10mA
V
IN
=Vo+0.5V to Vo+1.5V
Load Regulation
Over T
emperature Shutdown
Over T
emperature Hysteresis
T
emperature Coefficient
Power Supply Ripple
Rejection
LDR
OTS
OTH
TC
f=100Hz
PSRR
I
O
=100mA
f=1kHz
f=10kHz
I
O
=1mA to 100mA
0.5
160
30
40
55
50
35
dB
1
%
°
C
°
C
ppm/°
C
0. 5
1
%/V
I
O
=100mA
I
O
=500mA
I
O
=1.5A
Vo<0.3V
I
O
=0mA
Vo≥2.5V
Vo≥2.5V
MIN
2.5
-1.5
200
400
500
75
2
150
mA
μ
A
A
TYP
MAX
5.5
1.5
UNITS
V
%
mV
Power Analog Microelectronics
,
Inc
www.poweranalog.com
4
06/2011 Rev2.2
PAM3110
1.5A Low Dropout Voltage CMOS Regulator
Typical Performance Characteristics
T
A
=25°
C,C
IN
=4.7
μ
F,C
OUT
=4.7
μ
F,unless otherwise noted.
1. Output Voltage vs Input Voltage
Vo=3.3V
3.35
3.3
3.25
3.2
3.15
3.1
3.05
3
2.95
3
3.25 3.5 3.75
4
4.25 4.5 4.75 5
5.25 5.5
Input Voltage( V)
Io=10mA
Io=500mA
Io=1.5A
3.36
3.35
3.34
3.33
3.32
3.31
3.3
3.29
3.28
3.27
3.26
3.25
3.24
0
Vin=3.6V
Vin=4.2V
Vin=5V
300
600
900
1200
1500
2. Output Voltage vs Output Current
Vo=3.3V
O utput Current(m A)
100
90
80
70
60
50
40
3. Quiescent Current vs Input Voltage
1 00
90
80
70
60
50
40
3.3
3.5 3.7 3.9
4.1 4.3 4.5
Input Current(V)
4.7
4.9
5.1 5.3
5.5
4. Quiescent Current vs Temperature
0
30
60
90
120
150
Tem perature(℃)
5. Maximum Output Current vs Input Voltage
1.5
1.3
1.1
0.9
0.7
0.5
2.5
3
3.5
4
4.5
5
5.5
Input Voltage(V)
Power Analog Microelectronics
,
Inc
www.poweranalog.com
5
06/2011 Rev2.2
