Datasheet ADP2121 (Analog Devices) - 6

ADP2121 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.6 V, VOUT = 1.82 V, L = 0.47 µH (1800 mA, 1008, LQM2HPNR47MG0L), CIN = 2.2 µF (6.3 V, 0402, X5R, GRM155R60J225M), COUT = 4.7 µF (6.3 V, 0402, X5R, GRM155R60J475ME87D), EN = VIN, and TA = 25°C, unless otherwise noted.
100 100 90 90 AUTO MODE 80 80 70 70 IOUT = 300mA %) V %) ( 60 IN = 2.7V ( 60 IOUT = 100mA I NCY V OUT = 10mA 50 IN = 3.6V NCY E 50 E I ICI PWM MODE ICI OUT = 1mA F 40 VIN = 4.2V F 40 F F E E 30 V 30 IN = 5.0V 20 20 10 10 V V OUT = 1.82V OUT = 1.82 V 0 0 0.1 1 10 100 1000
004
2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
007
LOAD CURRENT (mA) INPUT VOLTAGE (V)
07407- 07407- Figure 4. Efficiency vs. Load Current Figure 7. Efficiency vs. Input Voltage (Auto Mode)
100 93 IOUT = 100mA 90 AUTO MODE 90 80 70 87 %) %) ( 60 ( Y C NCY 50 N E 84 IE ICI F 40 F FFIC E E 81 30 PWM MODE V V OUT = 1.8V OUT = 1.8V 20 V V OUT = 1.82V OUT = 1.82V 78 V V OUT = 1.85V OUT = 1.85V 10 V V OUT = 1.875V OUT = 1.875V V V OUT = 2.3V OUT = 2.3V 0 75 0.1 1 10 100 1000
049
2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
050
LOAD CURRENT (mA) INPUT VOLTAGE (V)
07407- 07407- Figure 5. Efficiency vs. Load Current for All Output Voltages Figure 8. Efficiency vs. Input Voltage for All Output Voltages (Auto Mode)
100 100 95 L = 0.47µH 90 1008 AUTO MODE 90 80 85 L = 0.47µH %) 70 %) ( 1008 ( 80 NCY 60 NCY E L = 0.47µH 75 E ICI PWM MODE 0805 ICI F F 70 L = 0.47µH F 50 F E E 0805 L = 0.45µH 65 0603 40 L = 0.45µH 0603 60 30 AUTO MODE V 55 IN = 2.7V VIN = 2.7V VOUT = 1.82V VOUT = 1.82V 20 50 0.1 1 10 100 1000
016
2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
019
LOAD CURRENT (mA) INPUT VOLTAGE (V)
07407- 07407- Figure 6. Efficiency vs. Load Current for Various Inductor Sizes Figure 9. Efficiency vs. Input Voltage for Various Inductor Sizes Rev. C | Page 6 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OVERVIEW MODE SELECTION Pulse-Width Modulation (PWM) Mode Auto Mode (PFM and PWM Switching) Pulse Frequency Modulation (PFM) Mode Transition ENABLE/SHUTDOWN INTERNAL CONTROL FEATURES Overcurrent Protection Soft Start Synchronous Rectification Compensation Undervoltage Lockout (UVLO) Output Short-Circuit Protection Thermal Shutdown (TSD) Protection APPLICATIONS INFORMATION INDUCTOR SELECTION INPUT CAPACITOR SELECTION OUTPUT CAPACITOR SELECTION PCB LAYOUT GUIDELINES OUTLINE DIMENSIONS ORDERING GUIDE