50 mA/500 mA, High Efficiency, Ultralow Power Step-Down Regulator Data Sheet ADP5300 FEATURES TYPICAL APPLICATION CIRCUIT Input supply voltage range: 2.15 V to 6.50 V V = 2.15 TO 6.50V 2.2H V IN OUT PVIN SW Operates down to 2.00 V voltage 10F ADP5300 Ultralow 180 nA quiescent current 10F ON Selectable output voltage of 0.8 V to 5.0 V PGND EN OFF 1.5% output accuracy over full temperature range in PWM SYNC/MODE FB PWM mode HYS STOP VID0: 1.2V VID8: 2.5V Selectable hysteresis mode or PWM operation mode VOUTOK VID1: 1.5V VID9: 2.6V STOP SW VID2: 1.8V VID10: 2.7V Output current AGND VID VID3: 2.0V VID11: 2.8V VID4: 2.1V VID12: 2.9V Up to 50 mA in hysteresis mode R0 EPAD VID5: 2.2V VID13: 3.0V VID6: 2.3V VID14: 3.3V Up to 500 mA in PWM mode VID7: 2.4V VID15: 3.6V VOUTOK flag monitors the output voltage Figure 1. Ultrafast stop switching control 100% duty cycle operation mode 2.0 MHz typical switching frequency in PWM mode with optional SYNC clock range from 1.5 MHz to 2.5 MHz Quick output discharge (QOD) option UVLO, OCP, and TSD protection 10-lead, 3 mm 3 mm LFCSP 40C to +125C operating temperature range APPLICATIONS Energy (gas and water) metering Portable and battery-powered equipment Medical applications Keep-alive power supplies GENERAL DESCRIPTION The ADP5300 is a high efficiency, ultralow quiescent current The ADP5300 contains a VOUTOK flag, which monitors the step-down regulator that draws only 180 nA quiescent current output voltage and runs at a 2 MHz switching frequency in to regulate the output. PWM mode. SYNC/MODE can be synchronized to an external clock from 1.5 MHz to 2.5 MHz. The ADP5300 runs from an input supply voltage range of 2.15 V to 6.50 V, allowing the use of multiple alkaline or NiMH, Li-Ion The ADP5300 includes an STOP pin that can disable the regulator cells, or other power sources. The output voltage is selectable from switching temporarily, in this way a quiet system environment 0.8 V to 5.0 V by an external VID resistor and factory fuse. The can be achieved to benefit noise sensitive circuitry, such as data total solution requires only four tiny external components. conversion, RF data transmission, and analog sensing. The ADP5300 can operate between hysteresis mode and pulse- Other key features in the ADP5300 include separate enabling, width modulation (PWM) mode via the SYNC/MODE pin. The QOD, and safety features such as overcurrent protection (OCP), regulator in hysteresis mode achieves excellent efficiency at a thermal shutdown (TSD), and input undervoltage lockout (UVLO). power of less than 1 mW and provides up to 50 mA of output The ADP5300 is available in a 10-lead, 3 mm 3 mm LFCSP current. The regulator in PWM mode produces a lower output rated for a 40C to +125C operating temperature range. ripple and supplies up to 500 mA of output current. The flexible Multifunction pin names may be referenced by their relevant configuration capability during operation of the device enables function only. very efficient power management to meet both the longest battery life and low system noise requirements. Rev. B 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 20152017 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com 13366-001ADP5300 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Short-Circuit Protection............................................................ 15 Applications ....................................................................................... 1 Soft Start ...................................................................................... 15 Typical Application Circuit ............................................................. 1 Startup with Precharged Output .............................................. 15 General Description ......................................................................... 1 100% Duty Operation ................................................................ 15 Revision History ............................................................................... 2 Active Discharge ......................................................................... 15 Detailed Functional Block Diagram .............................................. 3 VOUTOK Function ................................................................... 15 Specifications ..................................................................................... 4 Stop Switching ............................................................................ 16 Absolute Maximum Ratings ............................................................ 6 Thermal Shutdown .................................................................... 16 Thermal Resistance ...................................................................... 6 Applications Information .............................................................. 17 ESD Caution .................................................................................. 6 External Component Selection ................................................ 17 Pin Configuration and Function Descriptions ............................. 7 Selecting the Inductor ................................................................ 17 Typical Performance Characteristics ............................................. 8 Output Capacitor ........................................................................ 17 Theory of Operation ...................................................................... 14 Input Capacitor ........................................................................... 18 Buck Regulator Operational Modes ......................................... 14 Efficiency ..................................................................................... 18 Osillator and Synchronization .................................................. 14 Circuit Board Layout Recommendations ............................... 18 Adjustable and Fixed Output Voltages .................................... 14 Typical Application Circuits ......................................................... 19 Undervoltage Lockout (UVLO) ............................................... 15 Factory Programmable Options ................................................... 20 Enable/Disable ............................................................................ 15 Outline Dimensions ....................................................................... 21 Current Limit .............................................................................. 15 Ordering Guide .......................................................................... 21 REVISION HISTORY 11/2017Rev A. to Rev. B Change to Figure 44 ....................................................................... 19 Updated Outline Dimensions ....................................................... 21 Changes to Ordering Guide .......................................................... 21 6/2016Rev. 0 to Rev. A Changes to Features Section and General Description Section ....... 1 Change to SYNC Clock Range Parameter, Table 1 ...................... 4 Change to Table 4 ............................................................................. 7 Change to Oscillator and Synchronization Section ................... 14 Changes to Table 8 .......................................................................... 20 Changes to Ordering Guide .......................................................... 21 8/2015Revision 0: Initial Version Rev. B Page 2 of 21