NOT RECOMMENDED FOR NEW DESIGN
USE AP2132 OR AP7173
PAM3110
1.5A LOW DROPOUT VOLTAGE CMOS REGULATOR
Description
Pin Assignments
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 4.7µF 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.
Features
DSP, FPGA and Microprocessor Power Supplies
Output Voltages:1.2V, 1.5V,1.8V, 2.5V 3.3V and 5.0V
Stable with a Ceramic Output Capacitor
Dropout Voltage: 400mV@1.5A
Low Quiescent Current
Over Temperature Shutdown
Short Circuit Protection
Low Temperature Coefficient
Pb-Free Packages
Applications
DSP, FPGA and Microprocessor Power Supplies
SATA Power Supply
LCD TV/Monitors
Wireless Devices
Communication Devices
Portable Electronics
Post Regulator for SMS
PAM3110
Document number: DS36429 Rev. 2 - 3
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PAM3110
Typical Applications Circuit
Pin Configuration and Description
Pin Name
VIN
EN
CTRL
POK
ADJ
VOUT
NC
GND
Pin Number
SOP-8(EP)
W-DFN3x3-10
3
2
4
1
7
6
5
8,
Exposed Pad (9)
7, 8, 9
Function
Supply Input Voltage.
6
Chip Enable (Active-High).
10
Supply Voltage of ControlCircuitry.
5
Power Good Open Drain Output.
4
Set the output voltage by the feedback resistors. VO = 0.8V x (R1 + R2)/R2.
1, 2, 3
—
Exposed Pad
(11)
Output Voltage.
No Internal Connection.
Ground. The exposed pad must be soldered to a large PCB and connected to GND
formaximum powe r dissipation.
Functional Block Diagram
PAM3110
Document number: DS36429 Rev. 2 - 3
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PAM3110
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.)
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
Input Voltage
Storage Temperature
Maximum Junction Temperature
Lead Soldering Temperature
Rating
6
-65 to +150
150
300, (5sec)
Unit
V
°C
°C
°C
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Parameter
Rating
Unit
Supply Voltage
2.5 to 5.5
V
Ambient Temperature Range
-40 to +85
Junction Temperature Range
-40 to +125
°C
Thermal Information
Parameter
Thermal Resistance Junction to Case)
Thermal Resistance (Junction to Ambient)
Internal Power Dissipation (@TA = 25°C)
PAM3110
Document number: DS36429 Rev. 2 - 3
Symbol
θJC
θJA
PD
Package
Max
SOT-223
7
TO-252
7
TO-263
7
SOT-223
160
TO-252
90
TO-263
60
SOT-223
625
TO-252
1200
TO-263
2000
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Unit
°C/W
mW
August 2017
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AP2132 OR AP7173
PAM3110
Electrical Characteristics (@TA = +25°C, VIN = VO +0.5V, VCTRL = VEN = 5V, CIN = CO = 10µF, unless otherwise specified.)
Parameter
Symbol
Input Voltage Range
VIN
Output Voltage Accuracy
VO
Dropout Voltage
VDROP
Test Conditions
IO = 1mA to 1.5A
Min
Typ
V
-1.5
1.5
%
IO = 500mA
VO ≥ 2.5V
200
IO = 1.5A
VO ≥ 2.5V
400
ISC
VO < 0.3V
500
Quiescent Current
IQ
IO = 0mA
75
Line Regulation
LNR
Load Regulation
LDR
Over Temperature Shutdown
Over Temperature Hysteresis
OTS
OTH
Temperature Coefficient
Power Supply Ripple Rejection
PAM3110
Document number: DS36429 Rev. 2 - 3
VO ≤ 2.5V, IO = 10mA
VIN = VO +1.5V to VO +2.5V
VO > 2.5V, IO = 10mA
VIN = VO +0.5V to VO +1.5V
IO = 1mA to 100A
TC
PSRR
mV
mA
150
2
ILIM
IO = 100mA
f = 100Hz
f = 1kHz
f = 10kHz
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Units
5.5
Short Circuit Current
Current Limit
Max
2.5
µA
A
0.5
1
0.5
1
%/V
%
160
30
°C
°C
40
ppm/°C
55
50
35
dB
August 2017
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AP2132 OR AP7173
PAM3110
Typical Performance Characteristics (@TA = +25°C, CIN =4.7µF, COUT = 4.7µF, unless otherwise specified.)
PAM3110
Document number: DS36429 Rev. 2 - 3
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PAM3110
Typical Performance Characteristics (cont.) (@TA = +25°C, CIN =4.7µF, COUT = 4.7µF, unless otherwise specified.)
PAM3110
Document number: DS36429 Rev. 2 - 3
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PAM3110
Application Information
The PAM3110 family of low-dropout (LDO) regulators have several features that allow them to apply to a wide range of applications. The family
operates with very low input voltage and low dropout voltage (typically 300mV at full load), making it an efficient stand-alone power supply or
post regulator for battery or switch mode power supplies. The 1.5A output current make the PAM3110 family suitable for powering many
microprocessors and FPGA supplies.
External Capacitor Requirements
A 4.7μF or larger ceramic input bypass capacitor, connected between VIN and GND and located close to the PAM3110, is required for stability. A
4.7µF minimum value capacitor from VO to GND is also required. To improve transient response, noise rejection, and ripple rejection, an
additional 1 0μF or larger, low ESR capacitor is recommended at the output. A higher-value, low ESR output capacitor may be necessary if large,
fast-rise-time load transients are anticipated and the device is located several inches from the power source, especially if the minimum input
voltage of 2.5V is used.
Regulator Protection
The PAM3110 features internal current limiting, thermal protection and short circuit protection. During normal operation, the PAM3110 limits
output current to about 2A. When current limiting engages, the output voltage scales back linearly until the over current condition ends. While
current limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ratings of the package. If
the temperature of the device exceeds +150°C, thermal-protection circuitry will shut down. Once the device has cooled down to approximately
+30°C below the high temp trip point, regulator operation resumes. The short circuit current of the PAM3110 is about 0.5A when its output pin is
shorted to ground.
Thermal Information
The amount of heat that an LDO linear regulator generates is:
PD VIN VOIO
All integrated circuits have a maximum allowable junction temperature (TJ(MAX) above which normal operation is not assured. A system designer
must design the operating environment so that the operating junction temperature (TJ(MAX) does not exceed the maximum junction temperature
(TJ(MAX). The two main environmental variables that a designer can use to improve thermal performance are air flow and external heat sinks. The
purpose of thi s information is to aid the designer in determining the proper operating environment for a linear regulator that is operating at a
specific power level.
In general, the maximum expected power (PD(MAX)) consumed by a linear regulator is computed as:
Where:
VI(AVG) is the average input voltage.
VO(AVG) is the average output voltage.
IO(AVG) is the average output current.
I(Q) is the quiescent current.
For most LDO regulators, the quiescent current is insignificant compared to the average output current; therefore, the term VI(AVG) xI I(Q) can be
neglected. The operating junction temperature is computed by adding the ambient temperature (TA) and the increase in temperature due to the
regulator's power dissipation. The temperature rise is computed by multiplying the maximum expected power dissipation by the sum of the
thermal resistances between the junction and the case RθJC), the case to heatsink (RθCS), and the heatsink to ambient (RθSA). Thermal
resistances are measures of how effectively an object dissipates heat. Typically, the larger the device, the more surface area available for power
dissipation so that the object’s thermal resistance will be lowers.
PAM3110
Document number: DS36429 Rev. 2 - 3
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NOT RECOMMENDED FOR NEW DESIGN
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PAM3110
Ordering Information
PAM3110 X X X xxx X
Package Type
Pin Configuration
B: SOT-223
L: TO-252
M: TO-263
A Type:
1. VIN
2. GND
3. VOUT
Number of Pins
Output Voltage
Shipping Package
A: 3
B: 2
120: 1.2V
150: 1.5V
180: 1.8V
250: 2.5V
330: 3.3V
500: 5.0V
R: Tape & Reel
B Type:
1. GND
2. VOUT
3. VIN
Part Number
Output Voltage
PAM3110ABA120R
1.2V
PAM3110BBA120R
1.2V
PAM3110ALA120R
1.2V
PAM3110BLA120R
1.2V
PAM3110AMB120R
1.2V
PAM3110BMB120R
1.2V
PAM3110ABA150R
1.5V
PAM3110BBA150R
1.5V
PAM3110ALA150R
1.5V
PAM3110BLA150R
1.5V
PAM3110AMB150R
1.5V
PAM3110BMB150R
1.5V
PAM3110ABA180R
1.8V
PAM3110BBA180R
1.8V
PAM3110ALA180R
1.8V
PAM3110BLA180R
1.8V
PAM3110AMB180R
1.8V
PAM3110BMB180R
1.8V
PAM3110
Document number: DS36429 Rev. 2 - 3
Marking
P3110B
AXXYW
P3110B
BXXYW
P3110B
BXXYW
P3110B
BXXYW
P3110B
BXXYW
P3110B
BXXYW
P3110C
AXXYW
P3110C
BXXYW
P3110C
AXXYW
P3110C
BXXYW
P3110C
AXXYW
P3110C
BXXYW
P3110E
AXXYW
P3110E
BXXYW
P3110E
AXXYW
P3110E
BXXYW
P3110E
AXXYW
P3110E
BXXYW
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Package Type
Standard Package
SOT-223
2500 Units/Tape&Reel
SOT-223
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
SOT-223
2500 Units/Tape&Reel
SOT-223
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
SOT-223
2500 Units/Tape&Reel
SOT-223
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
August 2017
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AP2132 OR AP7173
PAM3110
Ordering Information (cont.)
Part Number
Output Voltage
PAM3110ABA250R
2.5V
PAM3110BBA250R
2.5V
PAM3110ALA250R
2.5V
PAM3110BLA250R
2.5V
PAM3110AMB250R
2.5V
PAM3110BMB250R
2.5V
PAM3110ABR330R
3.3V
PAM3110BBA330R
3.3V
PAM3110ALA330R
3.3V
PAM3110BLA330R
3.3V
PAM3110AMB330R
3.3V
PAM3110BMB330R
3.3V
PAM3110ABA500R
5.0V
PAM3110BBA500R
5.0V
PAM3110ALA500R
5.0V
PAM3110BLA500R
5.0V
PAM3110AMB500R
5.0V
PAM3110BMB500R
5.0V
PAM3110
Document number: DS36429 Rev. 2 - 3
Marking
P3110G
AXXYW
P3110G
BXXYW
P3110G
AXXYW
P3110G
BXXYW
P3110G
AXXYW
P3110G
BXXYW
P3110K
AXXYW
P3110K
BXXYW
P3110K
AXXYW
P3110K
BXXYW
P3110K
AXXYW
P3110K
BXXYW
P3110L
AXXYW
P3110L
BXXYW
P3110L
AXXYW
P3110L
BXXYW
P3110L
AXXYW
P3110L
BXXYW
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Package Type
Standard Package
SOT-223
2500 Units/Tape&Reel
SOT-223
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
SOT-223
2500 Units/Tape&Reel
SOT-223
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
SOT-223
2500 Units/Tape&Reel
SOT-223
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-252
2500 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
TO-263-2L
800 Units/Tape&Reel
August 2017
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AP2132 OR AP7173
PAM3110
Marking Information
PAM3110
Document number: DS36429 Rev. 2 - 3
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PAM3110
Package Outline Dimensions (All dimensions in mm.)
SOT-223
PAM3110
Document number: DS36429 Rev. 2 - 3
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PAM3110
Package Outline Dimensions (cont.) (All dimensions in mm.)
TO-252
PAM3110
Document number: DS36429 Rev. 2 - 3
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PAM3110
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2017, Diodes Incorporated
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PAM3110
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