Datasheet ADP5133 (Analog Devices) - 8

ADP5133 Data Sheet 100 100 90 90 80 80 70 (%) 70 (%) 60 60 ENCY ENCY 50 50 FFICI FFICI 40 40 30 30 BUCK1 E BUCK2 E 20 20 VIN = 2.4V V VIN = 3.6V 10 IN = 3.9V VIN = 4.2V 10 VIN = 4.5V V V 0 IN = 5.5V 0 IN = 5.5V 1 10 100 1000
038
0.001 0.01 0.1 1
035
LOAD CURRENT (A) LOAD CURRENT (A)
11991- 11991- 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 PWM/PSM Mode VOUT2 = 1.8 V, PWM Mode
100 100 90 90 80 80 70 (%) 70 (%) 60 60 ENCY ENCY 50 50 FFICI FFICI 40 40 30 30 BUCK1 E BUCK1 E 20 20 VIN = 2.3V VIN = 3.9V VIN = 3.6V 10 VIN = 4.2V 10 VIN = 4.2V V V 0 IN = 5.5V 0 IN = 5.5V 0.001 0.01 0.1 1
039
0.001 0.01 0.1 1
034
LOAD CURRENT (A) LOAD CURRENT (A)
11991- 11991- 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 PWM/PSM Mode
100 100 90 90 80 80 70 (%) 70 (%) 60 60 ENCY ENCY 50 50 FFICI FFICI 40 40 30 BUCK2 E 30 BUCK1 E 20 VIN = 2.3V 20 VIN = 2.3V VIN = 3.6V VIN = 3.6V 10 VIN = 4.2V 10 VIN = 4.2V V V 0 IN = 5.5V 0 IN = 5.5V 0.001 0.01 0.1 1
036
0.001 0.01 0.1 1
065
LOAD CURRENT (A) LOAD CURRENT (A)
11991- 11991- 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 PWM/PSM Mode VOUT1 = 0.8 V, PWM Mode Rev. A | Page 8 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATION CIRCUIT TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS GENERAL SPECIFICATIONS BUCK1 AND BUCK2 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 Auto PSM/PWM Operation PSM Current Threshold Oscillator/Phasing of Inductor Switching Short-Circuit Protection Soft Start Current Limit 100% Duty Operation Active Pull-Downs APPLICATIONS INFORMATION BUCK EXTERNAL COMPONENT SELECTION Feedback Resistors Inductor Output Capacitor Input Capacitor POWER DISSIPATION AND THERMAL CONSIDERATIONS BUCK REGULATOR POWER DISSIPATION JUNCTION TEMPERATURE PCB LAYOUT GUIDELINES TYPICAL APPLICATION SCHEMATICS OUTLINE DIMENSIONS ORDERING GUIDE