Datasheet ADP5023 (Analog Devices) - 9

Data Sheet ADP5023 100 100 90 90 80 80 70 70 ) ) (% 60 (% 60 Y Y C C 50 N 50 IEN IE IC C F 40 40 FFI EF E 30 30 20 20 VIN = 2.4V VIN = 3.9V VIN = 3.6V 10 VIN = 4.2V 10 VIN = 4.5V VIN = 5.5V VIN = 5.5V 0
8
0 0.001 0.01 0.1 1
03
0.001 0.01 0.1 1
035 9-
IOUT (A) I
0988
OUT (A)
09889- Figure 9. BUCK1 Efficiency vs. Load Current, Across Input Voltage, Figure 12. BUCK2 Efficiency vs. Load Current, Across Input Voltage, VOUT1 = 3.3 V, Auto Mode VOUT2 = 1.8 V, PWM Mode
100 100 90 90 80 80 70 70 ) ) (% 60 (% 60 Y Y C C N 50 N 50 IE IE C C 40 40 FFI FFI E E 30 30 20 20 VIN = 2.3V VIN = 3.9V VIN = 3.6V 10 V 10 IN = 4.2V VIN = 4.2V V VIN = 5.5V 0 IN = 5.5V 0 0.001 0.01 0.1 1
039
0.001 0.01 0.1 1
034
IOUT (A) I
09889-
OUT (A)
09889- Figure 10. BUCK1 Efficiency vs. Load Current, Across Input Voltage, Figure 13. BUCK1 Efficiency vs. Load Current, Across Input Voltage, VOUT1 = 3.3 V, PWM Mode VOUT1 = 0.8 V, Auto Mode
100 100 90 90 80 80 70 70 ) ) (% 60 (% 60 Y Y C C N 50 N 50 IE IE C C 40 40 FFI FFI E E 30 30 20 VIN = 2.3V 20 VIN = 2.3V VIN = 3.6V VIN = 3.6V 10 VIN = 4.2V 10 VIN = 4.2V VIN = 5.5V VIN = 5.5V 0 0 0.001 0.01 0.1 1
036
0.001 0.01 0.1 1
035 89-
IOUT (A) I
09889-
OUT (A)
098 Figure 11. BUCK2 Efficiency vs. Load Current, Across Input Voltage, Figure 14. BUCK1 Efficiency vs. Load Current, Across Input Voltage, VOUT2 = 1.8 V, Auto Mode VOUT1 = 0.8 V, PWM Mode Rev. F | Page 9 of 28 Document Outline Features Applications General Description Typical Application Circuit Table of Contents Revision History Specifications General Specifications BUCK1 and BUCK2 Specifications LDO 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 BUCK1 and BUCK2 Control Scheme PWM Mode Power Save Mode (PSM) PSM Current Threshold Oscillator/Phasing of Inductor Switching Short-Circuit Protection Soft Start Current Limit 100% Duty Operation Active Pull-Downs LDO 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 Power Dissipation and Thermal Considerations Buck Regulator Power Dissipation LDO Regulator Power Dissipation Junction Temperature PCB Layout Guidelines Typical Application Schematics Bill of Materials Outline Dimensions Ordering Guide