A Product Line of Diodes Incorporated PAM3102 DUAL 150mA HIGH PSRR LOW-DROPOUT CMOS REGULATOR Description Pin Assignments The dual LDO PAM3102 series of positive voltage linear regulators Top View TSOT26 feature high output voltage accuracy, low quiescent current and low dropout voltage, making them ideal for battery powered applications. The line transient response and load transient response are excellent. Their high PSRR make them useful in applications where AC noise on the input power supply must be suppressed. Space-saving TSOT26 package for 2-ch LDOs is attractive for portable and handheld applications. They have both thermal shutdown and a current limit feature to prevent device failure under extreme operating conditions. They are stable with an output capacitance of 2.2μF or greater. Features Output Accuracy: ±2% Low Dropout Voltage: 180mV@150mA High PSRR: 70dB@100Hz Applications Low Noise Output Cellular Phone Current Limiting Portable Electronics, PDA Short Circuit Protection Wireless Devices, Wireless LAN Thermal Shutdown Computer Peripherals Space Saving Package TSOT26 Camera Module Pb-Free Package GPS Receiver Typical Applications Circuit PAM3102 Document number: DSxxxxx Rev. 1 - 2 1 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 Pin Descriptions Pin Number 1 2 3 4 5 6 Pin Name CE1 VIN CE2 VOUT2 GND VOUT1 Function Output 1 Enable Input Output 2 Enable Output 2 Ground Output 1 Functional Block Diagram 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 Output Current Output Pin Voltage Storage Temperature ESD Rating (HBM) Lead Soldering Temperature PAM3102 Document number: DSxxxxx Rev. 1 - 2 Rating 6.0 150/150 Unit V mA GND -0.3 to VIN +0.3V -40 to +125 2 300, (5sec) °C kV °C V 2 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Parameter Rating Unit 5.5 V 0 to VIN V Supply Voltage Range Enable Input Resistance Junction Temperature -40 to +125 Operation Temperature -40 to +85 °C Thermal Information Parameter Symbol Package Max Thermal Resistance Junction to Case) θJC TSOT26 130 Thermal Resistance (Junction to Ambient) θJA TSOT26 250 Internal Power Dissipation PD TSOT26 400 Unit °C/W mW Electrical Characteristics (@TA = +25°C, VCE1 = VCE2 = VIN = VO +1V, CIN = 2.2µF, CO = 2.2µF, unless otherwise specified.) Parameter Symbol Input Voltage VIN Output Voltage VO Dropout Voltage VDROP Output Current Test Conditions Min IO = 1mA Typ Units 5.5 V -2.0 +2.0 % VO = 1.8V, IO = 150mA 950 VO = 2.5V, IO = 150mA 350 VO = 2.8V, IO = 150mA 180 150 IO Max Note 1 mV Note 2 mA ILIM VO ≥ 1.2V 200 Quiescent Current IQ IO = 0mA 175 250 Ground Pin Current IGND IO = 1mA to 150mA 200 250 µA 1 µA Current Limit Shutdown Current ISD VCE1 = VCE2 = 0V 0.1 Short Circuit Current ISC VO = 0V 150 Line Regulation Load Regulation Power Supply Ripple Rejection LNR LDR PSRR Output Noise VN CE Input High Threshold VTH CE Input Low Threshold VTL CE Pull-Up Resistance RCE TC Temperature Coefficient IO = 50mA, VIN = 3V to 4V VO = 1.8V IO = 50mA, VIN = 3.5V to 4.5V VO = 2.5V IO = 50mA, VIN = 3.8V to 4.8V VO = 2.8V VIN = 3.3V, IO = 1mA to 150mA IO = 50mA, VO = 1.8V mA mA -0.15 0.1 0.15 -2 1.0 2 f = 100Hz f = 1kHz f = 10kHz f = 10Hz to 100kHz %/V % 70 63 45 dB dB dB 35 µVRMS 1.5 V 0.3 1.7 µA 5 15 V MΩ 40 ppm/°C Over Temperature Shutdown OTS IO = 1mA 155 °C Over Temperature Hysteresis OTH IO = 1mA 40 °C Notes: 1. The minimym inout voltage (VIN(MIN) of the PAM3102 is determined by output voltage and dropout voltage. The minimum input voltage is defined as: VIN(MIN) = VO +VDROP 2. Output current is limited by PD, maximum IO = PD/(VIN(MAX) – VO). PAM3102 Document number: DSxxxxx Rev. 1 - 2 3 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 Typical Performance Characteristics (@TA = +25°C, CIN = 2.2µF, CO = 2.2µF, unless otherwise specified.) PAM3102 Document number: DSxxxxx Rev. 1 - 2 4 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 Typical Performance Characteristics (cont.) PAM3102 Document number: DSxxxxx Rev. 1 - 2 5 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 Typical Performance Characteristics (cont.) PAM3102 Document number: DSxxxxx Rev. 1 - 2 6 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 Typical Performance Characteristics (cont.) PAM3102 Document number: DSxxxxx Rev. 1 - 2 7 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 Typical Performance Characteristics (cont.) PAM3102 Document number: DSxxxxx Rev. 1 - 2 8 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 Application Information Capacitor Selection and Regulator Stability Similar to any low dropout regulator, the external capacitors used with the PAM3102 must be carefully selected for regulator stability and performance. A capacitor CIN of more than 1μF can be employed in the input pin, while there is no upper limit for the capacitance of CIN. Please note that the distance between CIN and the input pin of the PAM3102 should not exceed 0.5 inch. Ceramic capacitors are suitable for the PAM3102. Capacitors with larger values and lower ESR (equivalent series resistance) provide better PSRR and line-transient response. The PAM3102 is designed specifically to work with low ESR ceramic output capacitors in order to save space and improve performance. Using an output ceramic capacitor whose value is >2.2µF with ESR>5mΩ ensures stablilty. Shutdown Input Operation The PAM3102 is shutdown by pulling the CE input low, and turned on by tying the CE input to VIN or leaving the CE input floating. Input-Output (Dropout) Voltage A regulator's minimum input-output voltage differential (or dropout voltage) determines the lowest usable supply voltage. The PAM3102 has a typical 180mV dropout voltage. In batterypowered systems, this will determine the useful end-of-life battery voltage. Current Limit and Short Circuit Protection The PAM3102 features a current limit, which monitors and controls the gate voltage of the pass transistor. The output current can be limited to 300mA by regulating the gate voltage. The PAM3102 also has a built-in short circuit current limit. Thermal Considerations Thermal protection limits power dissipation in the PAM3102. When the junction temperature exceeds 150°C, the OTP (Over Temperature Protection) starts the thermal shutdown and turns the pass transistor off. The pass transistor resumes operation after the junction temperature drops below 120°C. For continuous operation, the junction temperature should be maintained below 125°C. The power dissipation is defined as: PD VIN V O * IO VIN * IGND The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surrounding airflow and temperature difference between junction and ambient. The maximum power dissipation can be calculated by the following formula: PD(MAX) TJ(MAX) T A / JA Where TJ(MAX) is the maximum allowable junction temperature +125°C , TA is the ambient temperature and θJA is the thermal resistance from the junction to the ambient. For example, as is 250°C/W for the SOT-23 package based on the standard JEDEC 51-3 for a single-layer thermal test board, the maximum power dissipation at TA =25°C can be calculated by following formula: PD(MAX) 125C 25C / 250 0.4 W SOT-23 It is also useful to calculate the junction temperature of the PAM3102 under a set of specific conditions. Suppose the input voltage VIN = 3.3V, the output current IO = 300mA and the case temperature TA = +40°C measured by a thermal couple during operation, the power dissipation is defined as: PD 3.3 V 2.8 V * 150mA (3.3 V 1.8 V ) * 150mA 3.3 V * 200A 300mW And the junction temperature TJ can be calculated as follows: TJ = TA + PD*θJA TJ = 40°C +0.3W*250°C/W =40°C + 75°C =115°C<TJ(MAX) = +125°C For this application, TJ is lower than the absolute maximum operating junction temperature,+125°C, so it is safe to use the PAM3102 in this configuration. PAM3102 Document number: DSxxxxx Rev. 1 - 2 9 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 Ordering Information Part Number PAM3102-AST26R1 PAM3102-BST26R1 Output Voltage VOUT1 1.8V VOUT2 2.8V VOUT1 1.8V VOUT2 2.5V Part Marking Package Type Standard Package ABAYW TSOT26 3000Units/Tape&Reel ABBYW TSOT26 3000Units/Tape&Reel Marking Information Top View TSOT26 PAM3102 Document number: DSxxxxx Rev. 1 - 2 10 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 Package Outline Dimensions (All dimensions in mm.) PAM3102 Document number: DSxxxxx Rev. 1 - 2 11 of 12 www.diodes.com July 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM3102 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. 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