Datasheet ADP5003 (Analog Devices) - 8

ADP5003 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 100 100 90 90 80 80 70 70 %) ( 60 %) 60 Y ( C Y N C 50 N IE 50 IE 40 FFIC 40 E FFIC E 30 30 20 3.3V 20 3.3V 2.5V 2.5V 1.8V 1.8V 10 1.3V 10 1.3V 1.1V 1.1V 0 0 0 0.5 1.0 1.5 2.0 2.5 3.0
307
0 0.5 1.0 1.5 2.0 2.5 3.0
407
LOAD CURRENT (A)
15021-
LOAD CURRENT (A)
15021- Figure 3. Buck Efficiency vs. Load Current, VPVIN1 = 5 V, fSW = 600 kHz at Figure 6. Adaptive Mode Efficiency vs. Load Current, VPVIN1 = 5 V at Various Buck Output Voltages Various Buck Output Voltages
100 90 90 80 80 70 70 60 %) ( 60 %) Y ( C Y 50 C N 50 N IE IE 40 40 FFIC E FFIC E 30 30 20 20 3.3V 3.3V 2.5V 2.5V 1.8V 10 1.8V 10 1.3V 1.3V 1.1V 1.1V 0 0 0 0.5 1.0 1.5 2.0 2.5 3.0
306
0 0.5 1.0 1.5 2.0 2.5 3.0
408
LOAD CURRENT (A)
15021-
LOAD CURRENT (A)
15021- Figure 4. Buck Efficiency vs. Load Current, VPVIN1 = 12 V, fSW = 600 kHz at Figure 7. Adaptive Mode Efficiency vs. Load Current, VPVIN1 = 12 V at Various Buck Output Voltages Various Buck Output Voltages
100 90 90 80 80 70 70 60 %) %) ( 60 ( Y Y C 50 C N N 50 IE IE 40 40 FFIC FFIC E E 30 30 20 20 300kHz 10 300kHz 10 600kHz 600kHz 1MHz 1MHz 0 0
1
0 0.5 1.0 1.5 2.0 2.5 3.0
1 308
0 0.5 1.0 1.5 2.0 2.5 3.0
3
LOAD CURRENT (A) LOAD CURRENT (A)
15021- 15021- Figure 5. Buck Efficiency vs. Load Current, VPVIN1 = 12 V, VVOUT1 = 3.3 V at Figure 8. Adaptive Mode Efficiency vs. Load Current, VPVIN1 = 12 V, Various Buck Switching Frequencies VPVOUT2 = 3.3 V at Various Buck Switching Frequencies Rev. 0 | Page 8 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