50 mA, 60 V, High Efficiency Buck Regulator Data Sheet ADP2360 FEATURES TYPICAL APPLICATION CIRCUIT Input voltage supply range: 4.5 V to 60 V ADP2360 L1 Adjustable output voltage range: 0.8 V to V V 8 VIN IN IN SW 7 V OUT C IN Factory-programmable fixed output voltage options of R PG 3.3 V and 5.0 V FB 4 C OUT PG Continuous output current up to 50 mA PG 2 Adjustable peak inductor current limit up to 140 mA ON 1 EN 3 OFF ITH Pulse frequency modulation (PFM) control R 5 ITH SS Very high efficiency AGND C SS PGND 90% at V = 9 V, V = 3.3 V, I = 10 mA (EPAD) IN OUT OUT 6 9 87% at V = 9 V, V = 3.3 V, I = 1 mA IN OUT OUT Low shutdown current: <4 A Figure 1. Low quiescent current: 12 A typical in sleep mode 100% duty cycle operation Undervoltage lockout (UVLO) No external compensation required Enable input with precision thresholds Programmable soft start Power-good output Thermal shutdown (TSD) protection 8-lead LFCSP package APPLICATIONS 4 mA to 20 mA loop powered systems HART modems Building automation Distributed power systems Industrial control supplies Other high VIN, low IOUT systems GENERAL DESCRIPTION The ADP2360 is a high efficiency, high input voltage, discontinu- the ADP2360 to optimize the efficiency for the application operat- ous conduction mode (DCM) synchronous, step-down, dc-to-dc ing conditions and minimize the compatible inductor size. switching regulator. The ADP2360 operates with a wide input The ADP2360 further offers a power-good (PG) pin to indicate voltage supply range from 4.5 V to 60 V and can source up to when the output voltage is good. Other key features include 100% 50 mA continuous output current, making it ideal for regulating duty cycle operation, precision enable control, external soft start power from a variety of voltage sources in space-constrained control, UVLO, and TSD protection. applications. The ADP2360 is available with an adjustable output The ADP2360 requires no external compensation and the solution (0.8 V to VIN) or in 3.3 V and 5.0 V factory-programmable fixed for the fixed output voltage options requires a minimum of three output voltage models. external components. The ADP2360 is available in a 3 mm 3 mm, The ADP2360 uses a single-pulse PFM architecture with an 8-lead LFCSP package with an operating junction temperature adjustable peak current level (I ) control to minimize the PEAK range from 40C to +125C. input and output ripple. The adjustable IPEAK current limit allows Rev. A 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 20162017 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. 13944-001ADP2360 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Device Features ........................................................................... 11 Applications ....................................................................................... 1 Applications Information .............................................................. 12 Typical Application Circuit ............................................................. 1 Setting the Output Voltage ........................................................ 12 General Description ......................................................................... 1 Input Capacitor Selection .......................................................... 12 Revision History ............................................................................... 2 Estimating the Switching Frequency ....................................... 12 Specifications ..................................................................................... 3 Setting the Peak Inductor Current ........................................... 12 Absolute Maximum Ratings ............................................................ 5 Inductor Selection ...................................................................... 13 Thermal Resistance ...................................................................... 5 Output Capacitor Selection....................................................... 13 ESD Caution .................................................................................. 5 Design Optimization ................................................................. 13 Pin Configuration and Function Descriptions ............................. 6 Recommended Components .................................................... 13 Typical Performance Characteristics ............................................. 7 PCB Layout Considerations .......................................................... 14 Theory of Operation ...................................................................... 10 Outline Dimensions ....................................................................... 15 Overview ...................................................................................... 10 Ordering Guide .......................................................................... 15 Control Scheme .......................................................................... 10 REVISION HISTORY 10/2017Rev. 0 to Rev. A Changes to Ordering Guide .......................................................... 15 5/2016Revision 0: Initial Version Rev. A Page 2 of 15