Datasheet ADP5041 (Analog Devices) - 2

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ADP5041 Data Sheet TABLE OF CONTENTS
Features .. 1 Buck Section .. 27 Functional Block Diagram .. 1 LDO Section ... 28 General Description ... 1 Supervisory Section ... 28 Revision History ... 2 Applications Information .. 31 Specifications ... 3 Buck External Component Selection ... 31 General Specifications ... 3 LDO External Component Selection .. 32 Supervisory Specifications .. 3 Output Capacitor .. 32 Buck Specifications ... 4 Supervisory Section ... 33 LDO1, LDO2 Specifications ... 5 Power Dissipation/Thermal Considerations ... 34 Input and Output Capacitor, Recommended Specifications .. 6 Application Diagram ... 36 Absolute Maximum Ratings .. 7 PCB Layout Guidelines .. 37 Thermal Resistance .. 7 Suggested Layout .. 37 ESD Caution .. 7 Bill of Materials ... 38 Pin Configuration and Function Descriptions ... 8 Factory Programmable Options ... 39 Typical Performance Characteristics ... 9 Outline Dimensions ... 40 Theory of Operation .. 26 Ordering Guide .. 40 Power Management Unit ... 26
REVISION HISTORY 5/2019—Rev. A to Rev. B
Changes to Figure 109 .. 32
4/2018—Rev. 0 to Rev. A
Updated Outline Dimensions ... 40 Changes to Ordering Guide .. 40
12/2011—Revision 0: Initial Version
Rev. B | Page 2 of 40 Document Outline FEATURES FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS GENERAL SPECIFICATIONS SUPERVISORY SPECIFICATIONS BUCK SPECIFICATIONS LDO1, LDO2 SPECIFICATIONS INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER MANAGEMENT UNIT Thermal Protection Undervoltage Lockout Enable/Shutdown Active Pull-Down BUCK SECTION Control Scheme PWM Mode Power Save Mode (PSM) PSM Current Threshold Short-Circuit Protection Soft Start Current Limit 100% Duty Operation LDO SECTION SUPERVISORY SECTION Reset Output Manual Reset Input Watchdog Input APPLICATIONS INFORMATION BUCK EXTERNAL COMPONENT SELECTION Feedback Resistors Inductor Output Capacitor Input Capacitor LDO EXTERNAL COMPONENT SELECTION Feedback Resistors OUTPUT CAPACITOR Input Bypass Capacitor Input and Output Capacitor Properties SUPERVISORY SECTION Threshold Setting Resistors Watchdog Input Current Negative-Going Transients at the Monitored Rail Watchdog Software Considerations POWER DISSIPATION/THERMAL CONSIDERATIONS Buck Regulator Power Dissipation LDO Regulator Power Dissipation Junction Temperature APPLICATION DIAGRAM PCB LAYOUT GUIDELINES SUGGESTED LAYOUT BILL OF MATERIALS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE