SPX3819 500mA Low-Noise LDO Voltage Regulator December 2019 Rev. 2.0.5 GENERAL DESCRIPTION APPLICATIONS The SPX3819 is a positive voltage regulator • Portable Consumer Equipment with a low dropout voltage and low noise • Portable Instrumentation output. In addition, this device offers a very low ground current of 800μA at 100mA output. The • Industrial Equipment SPX3819 has an initial tolerance of less than • SMPS Post Regulators 1% max and a logic compatible ON/OFF switched input. When disabled, power consumption drops to nearly zero. Other key FEATURES features include reverse battery protection, • Low Noise: 40μV Possible current limit, and thermal shutdown. The SPX3819 includes a reference bypass pin for • High Accuracy: 1% optimal low noise output performance. With its • Reverse Battery Protection very low output temperature coefficient, this device also makes a superior low power voltage • Low Dropout: 340mV at Full Load reference. • Low Quiescent Current: 90μA The SPX3819 is an excellent choice for use in • Zero Off-Mode Current battery-powered applications such as cordless telephones, radio control systems, and portable • Fixed & Adjustable Output Voltages: computers. It is available in several fixed − 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V & 5.0V output voltage options or with an adjustable Fixed Output Voltages output voltage. − ≥1.235V Adjustable Output Voltages This device is offered in 8 pin NSOIC, 8 pin DFN • Available in RoHS Compliant, Lead Free and 5-pin SOT-23 packages. Packages: − 5-pin SOT-23, 8-pin SOIC and 8-pin DFN TYPICAL APPLICATION DIAGRAM Fig. 1: SPX3819 Application Circuit 1/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of Input Voltage Range VIN ................................ 2.5V to 16V the device at these ratings or any other above those Enable Pin EN ............................................... 0.0V to VIN indicated in the operation sections of the specifications Junction Temperature Range ................. -40°C to +125°C below is not implied. Exposure to absolute maximum rating Thermal Resistance1 ..................................................... conditions for extended periods of time may affect reliability. θJA (SOT23-5) ...............................................191°C/W θJA (NSOIC-8) ............................................ 128.4°C/W VIN, EN ..................................................... -20V to +20V θJA (DFN-8) ................................................... 59°C/W Storage Temperature .............................. -65°C to 150°C Junction Temperature .......................................... 150°C Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, Power Dissipation ................................ Internally Limited TJ(max) the junction to ambient thermal resistance, and the Lead Temperature (Soldering, 5 sec) ..................... 260°C ambient θJA, and the ambient temperature TA. The ESD Rating (HBM - Human Body Model) .................... 1kV maximum allowable power dissipation at any ambient temperature is given: PD(max) = (TJ(max)-TA)/θJA, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown. ELECTRICAL SPECIFICATIONS Specifications with standard type are for an Operating Junction Temperature of TJ = 25°C only; limits applying over the full Operating Junction Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise indicated, VIN = VOUT + 1V (VIN = VOUT + 1.2V for 1.2V option), IL = 100µA, CL = 1µF, VEN ≥ 2.5V, TA= TJ = 25°C. Parameter Min. Typ. Max. Units Conditions -1 +1 Output Voltage Tolerance % -2 +2 • Output Voltage Temperature 57 ppm/°C Coefficient 0.04 0.1 VIN = VOUT +1 to 16V and VEN ≤ 6V Line Regulation 0.2 %/V • VIN = VEN = VOUT +1 ≤ 8V 0.2 VIN = VEN = VOUT +1 ≤16V TA = 25°C to 85°C Load Regulation 0.05 0.4 % IL = 0.1mA to 500mA 10 60 80 • IL = 100µA 125 175 250 • IL = 50mA Dropout Voltage (VIN-VOUT) 2 180 350 mV 450 • IL = 150mA 340 550 700 • IL = 500mA 0.05 3 VENABLE ≤ 0.4V Quiescent Current (IGND) µA 8 • VENABLE = 0.25V 90 150 190 • IL = 100µA µA 250 650 900 • IL = 50mA Ground Pin Current (IGND) 1.0 2.0 2.5 • IL = 150mA mA 6.5 25.0 30.0 • IL = 500mA Ripple Rejection (PSRR) 70 dB 2/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator Parameter Min. Typ. Max. Units Conditions 800 Current Limit (ILIMIT) 950 mA • VOUT=0V 300 µVRMS I(L1 0=H 1z0 –m 1A0, 0CkLH =z) 1 .0µF, CIN = 1µF, Output Noise (eNO) 40 µVRMS ICLI N= = 1 01mµFA, ,( C10L H=z 1 –.0 1µ0F0, kCHBzYP) = 1µF, Input Voltage Level Logic Low 0.4 V OFF (VIL) Input Voltage Level Logic High 2 V ON (VIH) 0.01 2 VIL ≤ 0.4V ENABLE Input Current µA 3 20 VIH ≥ 2.0V Note 2: Not applicable to output voltage 2V or less. PIN ASSIGNMENT Fig. 2: SPX3819 Pin Assignment PIN DESCRIPTION Pin # Pin # Pin # Name Description nSOIC DFN SOT-23 VIN 2 3 1 Supply Input GND 5, 6, 7, 8 7 2 Ground VOUT 3 5 5 Regulator Output Enable(input). CMOS compatible control input. Logic high – enable; EN 1 1 3 logic low or open = shutdown Adjustable part only. Feedback input. Connect to resistive voltage- ADJ divider network 4 8 4 Fixed version only. Internal reference bypass pin. Connect 10nF BYP to ground to reduce thermal noise on the output. NC - 2, 4, 6 - No Connect 3/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator ORDERING INFORMATION(1) Part Number Operating Temperature Range Lead-Free Package Packaging Method SPX3819M5-L/TR SPX3819M5-L-1-2/TR SPX3819M5-L-1-5/TR SPX3819M5-L-1-8/TR SOT-23-5 SPX3819M5-L-2-5/TR SPX3819M5-L-3-0/TR SPX3819M5-L-3-3/TR -40°C≤TJ≤+125°C Yes(2) Tape & Reel SPX3819M5-L-5-0/TR SPX3819R2-L/TR DFN-8 SPX3819R2-L-1-2/TR SPX3819S-L/TR NSOIC-8 SPX3819S-L-5-0/TR NOTES: 1. Refer to www.maxlinear.com/SPX3819 for most up-to-date Ordering Information 2. Visit www.maxlinear.com for additional information on Environmental Rating. 4/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator TYPICAL PERFORMANCE CHARACTERISTICS Fig. 3: Ground Current vs Load Current Fig. 4: Ground Current vs Input Voltage Fig. 5 Ground Current vs Load Current in Dropout Fig. 6 Output Voltage vs Input Voltage Fig. 7 Dropout Voltage vs Load Current Fig. 8 Output Voltage vs Load Current 5/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator Fig. 9 Ground Current vs Temperature with 100μA Load Fig. 10 Ground Current vs Temperature with 50mA Load Fig. 11 Ground Current vs Temperature with 500mA Load Fig. 12 Ground Current vs Temperature in Dropout Fig. 13 ENABLE Voltage, ON threshold, vs Input Voltage Fig. 14 Output Voltage vs Temperature 6/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator Fig. 15 Output Noise vs Bypass Capacitor Value IL = 10mA, Fig. 16 Line Transient Response for 3.3V Device 10Hz - 100kHz Fig. 17 Load Transient Response for 3.3V Device APPLICATION INFORMATION The SPX3819 requires an output capacitor for capacitor works in most application circuits, but device stability. Its value depends upon the the same stability often can be obtained with a application circuit. In general, linear regulator 1μF tantalum electrolytic. stability decreases with higher output currents. With the SPX3819 adjustable version, the In applications where the SPX3819 is sourcing minimum value of output capacitance is a less current, a lower output capacitance may be function of the output voltage. The value sufficient. For example, a regulator outputting decreases with higher output voltages, since only 10mA, requires approximately half the closed loop gain is increased. capacitance as the same regulator sourcing 150mA. TYPICAL APPLICATIONS CIRCUITS Bench testing is the best method for For fixed voltage options only. A 10nF capacitor determining the proper type and value of the on the BYP pin will significantly reduce output capacitor since the high frequency noise, but it may be left unconnected if the characteristics of electrolytic capacitors vary output noise is not a major concern. The widely, depending on type and manufacturer. A SPX3819 start-up speed is inversely high quality 2.2μF aluminum electrolytic proportional to the size of the BYP capacitor. 7/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator Applications requiring a slow rampup of the The SPX3819 in Figure 19 illustrates a typical output voltage should use a larger CBYP. adjustable output voltage configuration. Two However, if a rapid turn-on is necessary, the resistors (R1 and R2) set the output voltage. BYP capacitor can be omitted. The output voltage is calculated using the formula: The SPX3819’s internal reference is available through the BYP pin. VOUT = 1.235V x [1 + R1/R2] Figure 18 represents a SPX3819 standard R2 must be >10kΩ and for best results, R2 application circuit. The EN (enable) pin is pulled should be between 22kΩ and 47kΩ. high (>2.0V) to enable the regulator. To disable the regulator, EN < 0.4V. Fig. 19: Typical Adjustable Output Voltage Configuration Fig. 18: Standard Application Circuit 8/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator MECHANICAL DIMENSIONS 8-PIN SOICN 9/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator MECHANICAL DIMENSIONS (CONTINUED) 8-PIN 2X3 DFN 10/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator RECOMMENDED LAND PATTERN AND STENCIL 8-PIN 2X3 DFN 11/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator MECHANICAL DIMENSIONS (CONTINUED) 5-PIN SOT-23 12/13 Rev. 2.0.5

SPX3819 500mA Low-Noise LDO Voltage Regulator REVISION HISTORY Revision Date Description Reformat of Datasheet 2.0.0 08/23/12 Addition of SPX3819R2-L and SPX3819R2-L/TR part numbers 2.0.1 12/02/13 Added Storage Temperature Range and Junction Temperature in ABS MAX Ratings. Updated package drawings and corrected DFN-8 package marking information 2.0.2 05/20/14 [ECN 1423-03 6/3/14] 2.0.3 08/31/16 Updated logo and Ordering Information table. Update to MaxLinear logo. Updated format and Ordering Information. Clarified ADJ and 2.0.4 07/19/18 BYP pin. Correct y-axis on Figure 14. Updated ESD rating. 2.0.5 12/05/19 Corrected table alignment on last 5 specs of the Electrical Specifications table. CORPORATE HEADQUARTERS: 5966 La Place Court Suite 100 Carlsbad, CA 92008 Tel.: +1 (760) 692-0711 Fax: +1 (760) 444-8598 www.maxlinear.com The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by Maxlinear, Inc. Maxlinear, Inc. Assumes no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this guide. Complying with all applicable copyright laws is the responsibility of the user. Without limiting the rights under copyright, no part of this document may be reproduced into, stored in, or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of Maxlinear, Inc. Maxlinear, Inc. Does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Maxlinear, Inc. Receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of Maxlinear, Inc. Is adequately protected under the circumstances. Maxlinear, Inc. May have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except as expressly provided in any written license agreement from Maxlinear, Inc., the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property. Maxlinear, the Maxlinear logo, and any Maxlinear trademarks, MxL, Full-Spectrum Capture, FSC, G.now, AirPHY and the Maxlinear logo are all on the products sold, are all trademarks of Maxlinear, Inc. or one of Maxlinear’s subsidiaries in the U.S.A. and other countries. All rights reserved. Other company trademarks and product names appearing herein are the property of their respective owners. © 2012 - 2019 Maxlinear, Inc. All rights reserved. 13/13 Rev. 2.0.5