Datasheet ADP5043 (Analog Devices) - 10

ADP5043 Data Sheet 1.797 100 90 1.796 80 ) 1.795 V V ( IN = 5.5V 70 E ) G % ( 60 1.794 Y LTA VIN = 4.5V O 50 V IENC T 1.793 IC U F 40 TP EF U VIN = 3.6V O 1.792 30 20 2.4V 1.791 3.6V 10 4.5V 5.5V 1.790 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
13 010
0.0001 0.001 0.01 0.1 1
0 2-
OUTPUT CURRENT (A)
682-
OUTPUT CURRENT (A)
09 0968 Figure 9. Buck Load Regulation Across Input Voltage, Figure 12. Buck Efficiency vs. Load Current, Across Input Voltage, VOUT1 = 1.8 V, PWM Mode VOUT1 = 1.8 V, Auto Mode
100 100 2.4V 3.6V 90 90 4.5V 5.5V 80 80 70 70 ) ) % ( 60 (% 60 Y C NCY 50 E 50 IEN ICI IC F 40 F 40 F E EF 30 30 20 20 3.6V 10 10 4.5V 5.5V 0 0 0.0001 0.001 0.01 0.1 1
011
0.001 0.01 0.1 1
014 82-
OUTPUT CURRENT (A) OUTPUT CURRENT (A)
096 09682- Figure 10. Buck Efficiency vs. Load Current, Across Input Voltage, Figure 13. Buck Efficiency vs. Load Current, Across Input Voltage, VOUT1 = 3.3 V, Auto Mode VOUT1= 1.8 V, PWM Mode
100 100 3.6V –40°C 90 4.5V 90 +25°C 5.5V +85°C 80 80 70 70 ) ) % % ( 60 ( 60 NCY 50 NCY E 50 E ICI ICI F 40 F F 40 F E E 30 30 20 20 10 10 0 0 0.001 0.01 0.1 1
012
0.001 0.01 0.1 1
015 82- 82-
OUTPUT CURRENT (A) OUTPUT CURRENT (A)
096 096 Figure 11. Buck Efficiency vs. Load Current, Across Input Voltage, Figure 14. Buck Efficiency vs. Load Current, Across Temperature, V VOUT1 = 1.8 V, PWM Mode OUT1 = 3.3 V, PWM Mode Rev. B | Page 10 of 30 Document Outline FEATURES GENERAL DESCRIPTION HIGH LEVEL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS GENERAL SPECIFICATIONS SUPERVISORY SPECIFICATIONS BUCK SPECIFICATIONS LDO SPECIFICATIONS INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER MANAGEMENT UNIT Thermal Protection Undervoltage Lockout Enable/Shutdown 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 1 Input Watchdog 2 Input Watchdog Status Indicator APPLICATIONS INFORMATION BUCK EXTERNAL COMPONENT SELECTION Inductor Output Capacitor Input Capacitor LDO CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties SUPERVISORY SECTION Watchdog 1 Input Current Negative-Going VCC Transients Watchdog Software Considerations PCB LAYOUT GUIDELINES POWER DISSIPATION/THERMAL CONSIDERATIONS Buck Regulator Power Dissipation LDO Regulator Power Dissipation Junction Temperature EVALUATION BOARD SCHEMATICS AND ARTWORK SUGGESTED LAYOUT BILL OF MATERIALS APPLICATION DIAGRAM FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE