A Product Line of Diodes Incorporated 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: [email protected] 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: DSxxxxx Rev. 2 - 2 1 of 13 www.diodes.com September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated 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 6 Function Supply Input Voltage. 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: DSxxxxx Rev. 2 - 2 2 of 13 www.diodes.com September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated 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: DSxxxxx Rev. 2 - 2 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 3 of 13 www.diodes.com Unit °C/W mW September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated 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 Short Circuit Current Quiescent Current Current Limit Line Regulation VDROP % VO ≥ 2.5V 200 VO ≥ 2.5V 400 IQ IO = 0mA 75 LDR Document number: DSxxxxx Rev. 2 - 2 V 1.5 IO = 500mA VO > 2.5V, IO = 10mA VIN = VO +0.5V to VO +1.5V IO = 1mA to 1.5A TC PSRR mV mA 150 2 VO ≤ 2.5V, IO = 10mA VIN = VO +1.5V to VO +2.5V IO = 100mA f = 100Hz f = 1kHz f = 10kHz 4 of 13 www.diodes.com Units -1.5 IO = 1.5A ILIM LNR Max 5.5 500 OTS OTH PAM3110 Typ 2.5 VO < 0.3V Over Temperature Shutdown Over Temperature Hysteresis Power Supply Ripple Rejection IO = 1mA to 1.5A Min ISC Load Regulation Temperature Coefficient Test Conditions µA A 0.5 1 0.5 1 %/V % 160 30 °C °C 40 ppm/°C 55 50 35 dB September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3110 Typical Performance Characteristics (@TA = +25°C, CIN =4.7µF, COUT = 4.7µF, unless otherwise specified.) PAM3110 Document number: DSxxxxx Rev. 2 - 2 5 of 13 www.diodes.com September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3110 Typical Performance Characteristics (cont.) (@TA = +25°C, CIN =4.7µF, COUT = 4.7µF, unless otherwise specified.) PAM3110 Document number: DSxxxxx Rev. 2 - 2 6 of 13 www.diodes.com September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated 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 V O IO 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: DSxxxxx Rev. 2 - 2 7 of 13 www.diodes.com September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3110 Ordering Information 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: DSxxxxx Rev. 2 - 2 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 8 of 13 www.diodes.com 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 September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated 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: DSxxxxx Rev. 2 - 2 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 9 of 13 www.diodes.com 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 September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3110 Marking Information PAM3110 Document number: DSxxxxx Rev. 2 - 2 10 of 13 www.diodes.com September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3110 Package Outline Dimensions (All dimensions in mm.) SOT-223 PAM3110 Document number: DSxxxxx Rev. 2 - 2 11 of 13 www.diodes.com September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3110 Package Outline Dimensions (cont.) (All dimensions in mm.) TO-252 PAM3110 Document number: DSxxxxx Rev. 2 - 2 12 of 13 www.diodes.com September 2013 © Diodes Incorporated A Product Line of Diodes Incorporated 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. 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