Datasheet ADP2387 (Analog Devices) - 8

ADP2387 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25oC, VIN = 12 V, VOUT = 3.3 V, L = 2.2 µH, COUT = 100 µF + 47 µF, fSW = 600 kHz, unless otherwise noted.
100 100 95 95 90 90 85 85 %) %) ( 80 ( 80 NCY NCY E 75 E 75 ICI ICI F F F 70 INDUCTOR: F 70 INDUCTOR: E FDVE1040-2R2 E FDVE1040-4R7 65 V 65 OUT = 1.2V VOUT = 1.2V V V 60 OUT = 1.8V 60 OUT = 1.8V VOUT = 2.5V VOUT = 2.5V 55 VOUT = 3.3V 55 VOUT = 3.3V VOUT = 5.0V VOUT = 5.0V 50 50 0 1 2 3 4 5 6
005
0 1 2 3 4 5 6
008
OUTPUT CURRENT (A)
12643-
OUTPUT CURRENT (A)
12643- Figure 5. Efficiency at VIN = 12 V, fSW = 600 kHz Figure 8. Efficiency at VIN = 12 V, fSW = 300 kHz
100 100 95 95 90 90 85 85 %) %) ( 80 ( 80 NCY NCY E 75 E 75 ICI ICI F F F 70 F 70 E E INDUCTOR: 744 333 0100 65 INDUCTOR: 65 FDVE1040-2R2 VOUT = 1.0V V V 60 OUT = 1.8V 60 OUT = 1.2V VOUT = 2.5V VOUT = 1.8V 55 VOUT = 3.3V 55 VOUT = 2.5V VOUT = 5.0V VOUT = 3.3V 50 50 0 1 2 3 4 5 6
006
0 1 2 3 4 5 6
009
OUTPUT CURRENT (A)
12643-
OUTPUT CURRENT (A)
12643- Figure 6. Efficiency at VIN = 18 V, fSW = 600 kHz Figure 9. Efficiency at VIN = 5 V, fSW = 600 kHz
100 3.2 3.0 90 (μA) mA) 2.8 ( NT NT 80 2.6 CURRE N CURRE W NT 2.4 70 DO CE S E 2.2 SHUT UI Q 60 TJ = +125°C 2.0 TJ = +125°C TJ = +25°C TJ = +25°C TJ = –40°C TJ = –40°C 50 1.8 4 6 8 10 12 14 16 18 20
007
4 6 8 10 12 14 16 18 20
010
INPUT VOLTAGE (V)
12643-
INPUT VOLTAGE (V)
12643- Figure 7. Shutdown Current vs. Input Voltage Figure 10. Quiescent Current vs. Input Voltage Rev. C | Page 8 of 25 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME PRECISION ENABLE/SHUTDOWN INTERNAL REGULATOR (VREG) BOOTSTRAP CIRCUITRY OSCILLATOR SOFT START POWER GOOD PEAK CURRENT-LIMIT AND SHORT-CIRCUIT PROTECTION OVERVOLTAGE PROTECTION (OVP) UNDERVOLTAGE LOCKOUT (UVLO) THERMAL SHUTDOWN APPLICATIONS INFORMATION INPUT CAPACITOR SELECTION OUTPUT VOLTAGE SETTING VOLTAGE CONVERSION LIMITATIONS INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION PROGRAMMING INPUT VOLTAGE UVLO COMPENSATION DESIGN ADIsimPower DESIGN TOOL DESIGN EXAMPLE OUTPUT VOLTAGE SETTING FREQUENCY SETTING CURRENT-LIMIT THRESHOLD SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION COMPENSATION COMPONENTS SOFT START TIME PROGRAM INPUT CAPACITOR SELECTION RECOMMENDED EXTERNAL COMPONENTS CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATIONS CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE