SULR1722A 300mA Low Dropout Linear Regulator Technical Data Data Sheet N1580, Rev. - Description: The SULR1722A is a 3-pin low dropout linear regulator. The superior characteristics of the SULR1722A include zero base current loss, very low dropout voltage, and 2% accuracy output voltage. Typical ground current remains approximately 55μA, from no load to maximum loading conditions. Dropout voltage at 300mA output current is exceptionally low. Output current limiting and thermal limiting are built in to provide maximal protection to the SULR1722A against fault conditions. The SULR1722A comes in the popular 3-pin SOT-23 package. Features: • • • • • • • Low Dropout Voltage of 470mV at 300mA Output Current (3.0V Output Version). Guaranteed 300mA Output Current. Maximum Input Voltage is 8V Low Ground Current at 55μA. 2% Accuracy Output Voltage of 1.5V/1.8V/2.0V /2.5V /2.7V/ 3.0V/ 3.3V/ 3.5V/ 3.7V/ 3.8V/5.0V/ 5.2V. Needs only 1μF for Stability. Current and Thermal Limiting. Applications: • • • • • Voltage Regulator for CD-ROM Drivers. Voltage Regulator for LAN Cards. Voltage Regulator for Microprocessor. Wireless Communication Systems. Battery Powered Systems. Typical application circuit: Low Dropout Linear Regulator • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SULR1722A 300mA Low Dropout Linear Regulator Technical Data Data Sheet N1580, Rev. - Ordering Information: PIN CONFIGURATION SULR1722A-XXXXX PACKING TYPE TB: TUBE TR: TAPING & REEL SOT-23 TOP VIEW 1: GND 2: VOUT 3: VIN PACKAGING TYPE F: SOT-23 OUTPUT VOLTAGE 15: 1.5V 18: 1.8V 20: 2.0V 25: 2.5V 27: 2.7V 30: 3.0V 33: 3.3V 35: 3.5V 37: 3.7V 38: 3.8V 50: 5.0V 52: 5.2V Marking Diagram: Part No. Marking SULR1722A-18FTR SULR1722A-20FTR SULR1722A-25FTR SULR1722A-27FTR SULR1722A-30FTR SULR1722A-33FTR SULR1722A-35FTR SULR1722A-37FTR SULR1722A-52FTR BN18G BN20G BN25G BN27G BN30G BN33G BN35G BN37G BN52G • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SULR1722A Technical Data Data Sheet N1580, Rev. - 300mA Low Dropout Linear Regulator Absolute Maximum Ratings: Input Supply Voltage ………..................………………………………………….…………….. -0.3~8V Operating Temperature Range ...………………………………………………………… –40°C to 85°C Maximum Junction Temperature …………………………………………………………………..125°C Storage Temperature Range ……………………………………………………………..–65°C ~ 150°C Lead Temperature (Soldering) 10 sec. ……………………………………………………………260°C Thermal Resistance Junction to Case SOT-23 …………………………………………….…130°C/W Thermal Resistance Junction to Ambient SOT-23..……………………..……………………180°C/W (Assume no ambient airflow, no heatsink) Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Test Circuit Refer to the TYPICAL APPLICATION CIRCUIT. • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SULR1722A Technical Data Data Sheet N1580, Rev. - 300mA Low Dropout Linear Regulator Electrical Characteristics (CIN =1μF, COUT= 1μF, TA=25℃, unless otherwise specified)(Note 2) Note 1: To avoid output oscillation, aluminum electrolytic output capacitor is recommended and ceramic capacitor is not suggested. Note 2: Specifications are production tested at TA =25℃. Specifications over the -40℃ to 85℃ operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low ON time. Note 4: Current limit is measured by pulsing a short time. Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below the value measured with a 1V differential. • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SULR1722A Technical Data Data Sheet N1580, Rev. - 300mA Low Dropout Linear Regulator Typical Performance Characteristics • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SULR1722A Technical Data Data Sheet N1580, Rev. - 300mA Low Dropout Linear Regulator Typical Performance Characteristics (Continued) • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SULR1722A Technical Data Data Sheet N1580, Rev. - 300mA Low Dropout Linear Regulator Typical Performance Characteristics (Continued) • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SULR1722A Technical Data Data Sheet N1580, Rev. - 300mA Low Dropout Linear Regulator Block Diagram Pin Descriptions VOUT PIN GND PIN VIN PIN - Output pin. - Power GND. - Power Supply Input. • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SULR1722A 300mA Low Dropout Linear Regulator Technical Data Data Sheet N1580, Rev. - Application Information INPUT-OUTPUT CAPACITORS Linear regulators require input and output capacitors to maintain stability. Input capacitor at 1μF with 1μF aluminum electrolytic output capacitor is recommended. POWER DISSIPATION The SULR1722A obtains thermal-limiting circuitry, which is designed to protect the device against overload condition. For continuous load condition, maximum rating of junction temperature must not be exceeded. It is important to pay more attention in thermal resistance. It includes junction to case, junction to ambient. The maximum power dissipation of SULR1722A depends on the thermal resistance of its case and circuit board, the temperature difference between the die junction and ambient air, and the rate of airflow. The rate of temperature rise is greatly affected by the mounting pad configuration on the PCB, the board material, and the ambient temperature. When the IC mounting with good thermal conductivity is used, the junction temperature will be low even when large power dissipation applies. The power dissipation across the device is P = I OUT (V -V IN OUT ). The maximum power dissipation is: (TJ-max - TA) PMAX = RΘJA is the maximum allowable junction temperature (125°C), and T is the ambient temperature Where T J-max A suitable in application. As a general rule, the lower temperature is, the better reliability of the device is. So the PCB mounting pad should provide maximum thermal conductivity to maintain low device temperature. GND pin performs a dual function for providing an electrical connection to ground and channeling heat away. Therefore, connecting the GND pin to ground with a large pad or ground plane would increase the power dissipation and reduce the device temperature. • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SULR1722A Technical Data Data Sheet N1580, Rev. - 300mA Low Dropout Linear Regulator Physical Dimensions SOT-23 (unit: mm) Note: 1. Refer to JEDEC MO-178. 2. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 10 mil per side. 3. Dimension "E1" does not include inter-lead flash or protrusions. 4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SULR1722A Technical Data Data Sheet N1580, Rev. - 300mA Low Dropout Linear Regulator DISCLAIMER: 1- The information given herein, including the specifications and dimensions, is subject to change without prior notice to improve product characteristics. Before ordering, purchasers are advised to contact the SMC - Sangdest Microelectronics (Nanjing) Co., Ltd sales department for the latest version of the datasheet(s). 2- In cases where extremely high reliability is required (such as use in nuclear power control, aerospace and aviation, traffic equipment, medical equipment , and safety equipment) , safety should be ensured by using semiconductor devices that feature assured safety or by means of users’ fail-safe precautions or other arrangement . 3- In no event shall SMC - Sangdest Microelectronics (Nanjing) Co., Ltd be liable for any damages that may result from an accident or any other cause during operation of the user’s units according to the datasheet(s). SMC - Sangdest Microelectronics (Nanjing) Co., Ltd assumes no responsibility for any intellectual property claims or any other problems that may result from applications of information, products or circuits described in the datasheets. 4- In no event shall SMC - Sangdest Microelectronics (Nanjing) Co., Ltd be liable for any failure in a semiconductor device or any secondary damage resulting from use at a value exceeding the absolute maximum rating. 5- No license is granted by the datasheet(s) under any patents or other rights of any third party or SMC - Sangdest Microelectronics (Nanjing) Co., Ltd. 6- The datasheet(s) may not be reproduced or duplicated, in any form, in whole or part, without the expressed written permission of SMC - Sangdest Microelectronics (Nanjing) Co., Ltd. 7- The products (technologies) described in the datasheet(s) are not to be provided to any party whose purpose in their application will hinder maintenance of international peace and safety nor are they to be applied to that purpose by their direct purchasers or any third party. 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