50 mA/500 mA, High Efficiency, Ultralow Power Step-Down Regulator Data Sheet ADP5301 FEATURES TYPICAL APPLICATION CIRCUIT Input start-up voltage range: 2.15 V to 6.50 V 2.2H V = 3.6V V IN OUT Operates down to 2.00 V voltage PVIN SW 10F Ultralow 180 nA quiescent current with no load ADP5301 10F (9-BALL WLCSP) Selectable output voltage of 1.2 V to 3.6 V or 0.8 V to 5.0 V ON EN PGND 1.5% output accuracy over full temperature range in OFF PWM mode PWM Selectable hysteresis mode or PWM operation mode SYNC/ FB HYS MODE Output current VID0: 1.2V VID8: 2.5V Up to 50 mA in hysteresis mode VOUTOK VID VID1: 1.5V VID9: 2.6V VID2: 1.8V VID10: 2.7V Up to 500 mA in PWM mode R VID VID3: 2.0V VID11: 2.8V VID4: 2.1V VID12: 2.9V VOUTOK flag monitors the output voltage VID5: 2.2V VID13: 3.0V AGND VID6: 2.3V VID14: 3.3V 100% duty cycle operation mode VID7: 2.4V VID15: 3.6V 2 MHz switching frequency with optional synchronization Figure 1. input from 1.5 MHz to 2.5 MHz QOD option UVLO, OCP, and TSD protection 9-ball, 1.65 mm 1.87 mm WLCSP 40C to +125C junction temperature APPLICATIONS Energy (gas and water) metering Portable and battery-powered equipment Medical applications Keep-alive power supplies GENERAL DESCRIPTION The ADP5301 contains a VOUTOK flag, which monitors the The ADP5301 is a high efficiency, ultralow quiescent current step-down regulator that draws only a 180 nA quiescent output voltage and runs at a 2 MHz switching frequency in current to regulate the output at no load. PWM mode. SYNC/MODE can synchronize to an external clock from 1.5 MHz to 2.5 MHz. The ADP5301 runs from an input startup voltage range of 2.15 V to 6.50 V, allowing the use of multiple alkaline/NiMH, Li-Ion Other key features in the ADP5301 include separate enabling, cells, or other power sources. The output voltage is selectable from quick output discharge (QOD), and safety features such as 0.8 V to 5.0 V by an external VID resistor and factory fuse. The overcurrent protection (OCP), thermal shutdown (TSD), and total solution requires only four tiny external components. input undervoltage lockout (UVLO). The ADP5301 can operate between hysteresis mode and PWM The ADP5301 is available in a 9-ball, 1.65 mm 1.87 mm mode via the SYNC/MODE pin. The regulator in hysteresis mode WLCSP rated for a 40C to +125C junction temperature range. achieves excellent efficiency at a power of less than 1 mW and provides up to 50 mA of output current. The regulator in PWM mode produces a lower output ripple and supplies up to 500 mA of output current. The flexible configuration capability during operation of the device enables very efficient power management to meet both the longest battery life and low system noise requirements. Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20152019 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 13 16 9-0 01ADP5301 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Short-Circuit Protection............................................................ 15 Applications ....................................................................................... 1 Soft Start ...................................................................................... 15 Typical Application Circuit ............................................................. 1 Startup with a Precharged Output ........................................... 15 General Description ......................................................................... 1 100% Duty Cycle Operation ..................................................... 15 Revision History ............................................................................... 2 Active Discharge ......................................................................... 15 Functional Block Diagram .............................................................. 3 VOUTOK Function ................................................................... 15 Specifications ..................................................................................... 4 Thermal Shutdown .................................................................... 15 Absolute Maximum Ratings ............................................................ 6 Applications Information .............................................................. 16 Thermal Resistance ...................................................................... 6 External Component Selection ................................................ 16 ESD Caution .................................................................................. 6 Selecting the Inductor ................................................................ 16 Pin Configuration and Function Descriptions ............................. 7 Output Capacitor ........................................................................ 16 Typical Performance Characteristics ............................................. 8 Input Capacitor ........................................................................... 17 Theory of Operation ...................................................................... 14 Efficiency ..................................................................................... 17 Buck Regulator Operation Modes ............................................ 14 Printed Circuit Board (PCB) Layout Recommendations ..... 18 Oscillator and Synchronization ................................................ 14 Typical Application Circuits ......................................................... 19 Adjustable and Fixed Output Voltages .................................... 14 Factory Programmable Options ................................................... 20 Undervoltage Lockout (UVLO) ............................................... 15 Outline Dimensions ....................................................................... 21 Enable/Disable ............................................................................ 15 Ordering Guide .......................................................................... 21 Current Limit .............................................................................. 15 REVISION HISTORY 7/2019Rev. B to Rev. C Change to Table 4 .............................................................................. 7 Changes to Adjustable and Fixed Output Voltages Section ...... 15 Change to Oscillator and Synchronization Section ................... 14 Changes to Table 8, Table 9, and Table 10 ................................... 20 Changes to Table 8 .......................................................................... 20 Changes to Ordering Guide .......................................................... 21 Updated Outline Dimensions ....................................................... 21 12/2015Rev. 0 to Rev. A Changes to Ordering Guide .......................................................... 21 6/2016Rev. A to Rev. B Changes to Features Section and General Description Section ....... 1 6/2015Revision 0: Initial Version Change to SYNC Clock Range Parameter, Table 1 ...................... 4 Rev. C Page 2 of 21