Datasheet ADP2390 (Analog Devices) - 2

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ADP2389/ADP2390 Data Sheet TABLE OF CONTENTS
Features .. 1
 
Undervoltage Lockout (UVLO) ... 13
 
Applications ... 1
 
Thermal Shutdown .. 13
 
Typical Applications Circuit .. 1
 
Applications Information .. 14
 
General Description ... 1
 
Input Capacitor Selection .. 14
 
Revision History ... 2
 
Output Voltage Setting .. 14
 
Detailed Functional Block Diagram .. 3
 
Inductor Selection .. 14
 
Specifications ... 4
 
Output Capacitor Selection... 15
 
Absolute Maximum Ratings .. 6
 
Programming Input Voltage UVLO .. 15
 
Thermal Information ... 6
 
Compensation Design ... 15
 
ESD Caution .. 6
 
Design Example .. 17
 
Pin Configuration and Function Descriptions ... 7
 
Output Voltage Setting .. 17
 
Typical Performance Characteristics ... 8
 
Frequency Setting ... 17
 
Theory of Operation .. 12
 
Inductor Selection .. 17
 
Control Scheme .. 12
 
Output Capacitor Selection... 17
 
PFM Mode (ADP2390 Only) .. 12
 
Compensation Components ... 18
 
Precision Enable/Shutdown .. 12
 
Soft Start Time Program ... 18
 
Internal Regulator (VREG) ... 12
 
Input Capacitor Selection .. 18
 
Bootstrap Circuitry .. 12
 
Schematic for Design Example ... 18
 
Oscillator ... 12
 
External Components Recommendation .. 19
 
Soft Start .. 13
 
Circuit Board Layout Recommendations ... 20
 
Fast Transient Response .. 13
 
Typical Application Circuits ... 22
 
Power Good ... 13
 
Outline Dimensions ... 23
 
Peak Current-Limit and Short-Circuit Protection ... 13
 
Ordering Guide .. 23
 
Overvoltage Protection (OVP) ... 13
  REVISION HISTORY 8/15—Revision 0: Initial Version
Rev. 0 | Page 2 of 23 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL INFORMATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME PFM MODE (ADP2390 ONLY) PRECISION ENABLE/SHUTDOWN INTERNAL REGULATOR (VREG) BOOTSTRAP CIRCUITRY OSCILLATOR SOFT START FAST TRANSIENT RESPONSE POWER GOOD PEAK CURRENT-LIMIT AND SHORT-CIRCUIT PROTECTION OVERVOLTAGE PROTECTION (OVP) UNDERVOLTAGE LOCKOUT (UVLO) THERMAL SHUTDOWN APPLICATIONS INFORMATION INPUT CAPACITOR SELECTION OUTPUT VOLTAGE SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION PROGRAMMING INPUT VOLTAGE UVLO COMPENSATION DESIGN DESIGN EXAMPLE OUTPUT VOLTAGE SETTING FREQUENCY SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION COMPENSATION COMPONENTS SOFT START TIME PROGRAM INPUT CAPACITOR SELECTION SCHEMATIC FOR DESIGN EXAMPLE EXTERNAL COMPONENTS RECOMMENDATION CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE