Datasheet ADP5310 (Analog Devices) - 9

Data Sheet ADP5310 TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 6 V, VOUT1 = 4 V, VOUT2 = 3 V, L1 = 4.7 µH, L2 = 6.8 µH, CIN = COUT = 10 μF, fSW = 1.2 MHz, TA = 25°C, unless otherwise noted.
90 100 80 90 70 80 70 60 %) ( %) ( 60 50 NCY E NCY 50 E 40 ICI F ICI F F 40 E F 30 E 30 V 20 IN = 5V VIN = 5V VIN = 7.2V 20 VIN = 7.2V VIN = 9V V 10 IN = 9V VIN = 12V 10 VIN = 12V VIN = 15V VIN = 15V 0 0 0.1 1 10 100 1000
004
0.1 1 10 100 1000
007
LOAD CURRENT (mA)
13008-
LOAD CURRENT (mA)
13008- Figure 4. Channel 1 Auto PSM/PWM Efficiency vs. Load Current, VOUT1 = 1.2 V Figure 7. Channel 1 Auto PSM/PWM Efficiency vs. Load Current, VOUT1 = 1.8 V
100 100 90 90 80 80 70 70 %) ( %) ( 60 60 NCY E NCY E 50 ICI 50 F ICI F F E F 40 E 40 V 30 IN = 5V VIN = 5V V 30 IN = 7.2V VIN = 7.2V VIN = 9V V 20 IN = 9V VIN = 12V 20 VIN = 12V VIN = 15V VIN = 15V 10 10 0.1 1 10 100 1000
005
0.1 1 10 100 1000
008
LOAD CURRENT (mA)
13008-
LOAD CURRENT (mA)
13008- Figure 5. Channel 1 Auto PSM/PWM Efficiency vs. Load Current, VOUT1 = 2.5 V Figure 8. Channel 1 Auto PSM/PWM Efficiency vs. Load Current, VOUT1 = 3.3 V
100 90 80 90 70 80 60 %) 70 %) ( ( 50 NCY 60 NCY E E 40 ICI ICI F F F 50 F E E 30 40 20 V V IN = 7.2V IN = 5V V 30 VIN = 9V 10 IN = 7.2V V V IN = 12V IN = 9V V V IN = 15V IN = 12V 20 0
009
0.1 1 10 100 1000
006
0 100 200 300 400 500 600 700 800 LOAD CURRENT (mA) LOAD CURRENT (mA)
13008- 13008- Figure 6. Channel 1 Auto PSM/PWM Efficiency vs. Load Current, VOUT1 = 5 V Figure 9. Channel 1 PWM Efficiency vs. Load Current, VOUT1 = 1.2 V Rev. A | Page 9 of 28 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS BUCK REGULATORS AND LOAD SWITCH SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATION MODES PWM Mode PSM Mode Hysteresis Mode Mode Selection ADJUSTABLE AND FIXED OUTPUT VOLTAGES UNDERVOLTAGE LOCKOUT (UVLO) ENABLE AND SHUTDOWN FEATURES INTERNAL LINEAR REGULATOR (VREG) OSCILLATOR AND SYNCHRONIZATION CURRENT LIMIT SHORT-CIRCUIT PROTECTION SOFT START STARTUP WITH PRECHARGED OUTPUT 100% DUTY OPERATION ACTIVE DISCHARGE POWER-GOOD FUNCTION LOAD SWITCH THERMAL SHUTDOWN APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION SELECTING THE INDUCTOR OUTPUT CAPACITOR INPUT CAPACITOR ADJUSTABLE OUTPUT VOLTAGE PROGRAMMING EFFICIENCY Power Switch Conduction Losses Inductor Losses Driver Losses Transition Losses RECOMMENDED BUCK EXTERNAL COMPONENTS CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE