Datasheet ADP5003 (Analog Devices) - 2

link to page 1 link to page 1 link to page 1 link to page 1 link to page 2 link to page 3 link to page 4 link to page 5 link to page 5 link to page 6 link to page 6 link to page 6 link to page 7 link to page 8 link to page 14 link to page 14 link to page 14 link to page 16 link to page 17 link to page 17 link to page 17 link to page 17 link to page 18 link to page 20 link to page 20 link to page 21 link to page 21 link to page 21 link to page 21 link to page 21 link to page 22 link to page 22 link to page 22 link to page 23 link to page 23 link to page 23 link to page 23 link to page 23 link to page 23 link to page 23 link to page 23 link to page 23 link to page 24 link to page 24 link to page 24 link to page 24 link to page 25 link to page 25 link to page 26 link to page 26 link to page 27 link to page 28 link to page 29 link to page 29
ADP5003 Data Sheet TABLE OF CONTENTS
Features .. 1  Setting the Switching Frequency for the Buck Regulator ... 21  Applications ... 1  Setting the Output Voltage for the Buck Regulator ... 21  Functional Block Diagram .. 1  Selecting the Inductor for the Buck Regulator ... 21  General Description ... 1  Selecting the Output Capacitor for the Buck Regulator .. 21  Revision History ... 2  Designing the Compensation Network for the Buck Specifications ... 3  Regulator ... 22  Buck Regulator Specifications .. 4  Selecting the Input Capacitor for the Buck Regulator ... 22  LDO Specifications .. 5  Adaptive Headroom Control Design Example .. 23  Adaptive Headroom Controller Specifications .. 5  Setting the Switching Frequency for the Buck Regulator Using Adaptive Headroom Control .. 23  Absolute Maximum Ratings .. 6  Setting the Output Voltage for the Buck Regulator Using Thermal Resistance .. 6  Adaptive Headroom Control .. 23  ESD Caution .. 6  Selecting the Inductor for the Buck Regulator Using Adaptive Pin Configuration and Function Descriptions ... 7  Headroom Control ... 23  Typical Performance Characteristics ... 8  Selecting the Output Capacitors for the Buck Regulator Using Theory of Operation .. 14  Adaptive Headroom Control .. 23  Power Management Unit ... 14  Designing the Compensation Network for the Buck Regulator Using Adaptive Headroom Control ... 24  Buck Regulator .. 14  Selecting the Input Capacitor for the Buck Regulator Using LDO Regulator .. 16  Adaptive Headroom Control .. 24  Power-Good .. 17  Recommended Buck External Components for the Buck Output Voltage of the Buck Regulator ... 17  Regulator .. 25  Output Voltage of the LDO Regulator ... 17  Buck Configurations .. 26  Voltage Conversion Limitations ... 17  Independent .. 26  Component Selection... 18  Adaptive Headroom ... 27  Compensation Components Design .. 20  Layout Considerations ... 28  Junction Temperature .. 20  Outline Dimensions ... 29  Buck Regulator Design Example .. 21  Ordering Guide .. 29 
REVISION HISTORY 11/2017—Revision 0: Initial Version
Rev. 0 | Page 2 of 29 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS BUCK REGULATOR SPECIFICATIONS LDO SPECIFICATIONS ADAPTIVE HEADROOM CONTROLLER SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER MANAGEMENT UNIT Adaptive Headroom Control Precision Enable/Shutdown Undervoltage Lockout (UVLO) Thermal Shutdown (TSD) Active Pull Down Soft Start (SS) Power-Good BUCK REGULATOR Control Scheme Oscillator Frequency Control External Oscillator Synchronization Buck Startup Current-Limit and Short-Circuit Protection LDO REGULATOR LDO Startup Current Limit Differential Remote Sensing POWER-GOOD OUTPUT VOLTAGE OF THE BUCK REGULATOR OUTPUT VOLTAGE OF THE LDO REGULATOR VOLTAGE CONVERSION LIMITATIONS COMPONENT SELECTION Output Capacitors Input Capacitor Inductor COMPENSATION COMPONENTS DESIGN JUNCTION TEMPERATURE BUCK REGULATOR DESIGN EXAMPLE SETTING THE SWITCHING FREQUENCY FOR THE BUCK REGULATOR SETTING THE OUTPUT VOLTAGE FOR THE BUCK REGULATOR SELECTING THE INDUCTOR FOR THE BUCK REGULATOR SELECTING THE OUTPUT CAPACITOR FOR THE BUCK REGULATOR DESIGNING THE COMPENSATION NETWORK FOR THE BUCK REGULATOR SELECTING THE INPUT CAPACITOR FOR THE BUCK REGULATOR ADAPTIVE HEADROOM CONTROL DESIGN EXAMPLE SETTING THE SWITCHING FREQUENCY FOR THE BUCK REGULATOR USING ADAPTIVE HEADROOM CONTROL SETTING THE OUTPUT VOLTAGE FOR THE BUCK REGULATOR USING ADAPTIVE HEADROOM CONTROL SELECTING THE INDUCTOR FOR THE BUCK REGULATOR USING ADAPTIVE HEADROOM CONTROL SELECTING THE OUTPUT CAPACITORS FOR THE BUCK REGULATOR USING ADAPTIVE HEADROOM CONTROL SELECTING THE INPUT CAPACITOR FOR THE BUCK REGULATOR USING ADAPTIVE HEADROOM CONTROL RECOMMENDED BUCK EXTERNAL COMPONENTS FOR THE BUCK REGULATOR BUCK CONFIGURATIONS INDEPENDENT ADAPTIVE HEADROOM LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE