Datasheet ADP2443 (Analog Devices) - 8

ADP2443 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25oC, VIN = 24 V, VOUT = 5 V, L = 6.8 µH, COUT = 47 µF × 2, fSW = 600 kHz, unless otherwise noted.
100 100 90 90 80 80 %) %) ( ( 70 70 NCY NCY E E ICI 60 ICI 60 F F F F E E 50 50 VOUT = 5V, L = 6.8µH VOUT = 5V, L = 6.8µH 40 VOUT = 3.3V, L = 4.7µH 40 VOUT = 3.3V, L = 4.7µH VOUT = 1.2V, L = 2.2µH VOUT = 1.2V, L = 2.2µH 30 30 0 0.5 1.0 1.5 2.0 2.5 3.0
005
0 0.5 1.0 1.5 2.0 2.5 3.0
008
OUTPUT CURRENT (A)
14794-
OUTPUT CURRENT (A)
14794- Figure 5. Efficiency at VIN = 24 V, fSW = 600 kHz Figure 8. Efficiency at VIN = 12 V, fSW = 600 kHz
100 100 90 90 80 80 %) %) ( ( 70 70 NCY NCY E E ICI 60 ICI 60 F F F F E E 50 50 VOUT = 5V, L = 10µH VOUT = 5V, L = 10µH 40 VOUT = 3.3V, L = 10µH 40 VOUT = 3.3V, L = 10µH VOUT = 1.2V, L = 4.7µH VOUT = 1.2V, L = 4.7µH 30 30 0 0.5 1.0 1.5 2.0 2.5 3.0
006
0 0.5 1.0 1.5 2.0 2.5 3.0
009
OUTPUT CURRENT (A)
14794-
OUTPUT CURRENT (A)
14794- Figure 6. Efficiency at VIN = 24 V, fSW = 300 kHz Figure 9. Efficiency at VIN = 12 V, fSW = 300 kHz
100 100 90 90 80 80 %) %) ( ( 70 70 NCY NCY E E ICI 60 ICI 60 F F F F E E 50 50 VOUT = 5V, L = 3.3µH VOUT = 5V, L = 3.3µH 40 VOUT = 3.3V, L = 2.2µH 40 VOUT = 3.3V, L = 2.2µH VOUT = 1.2V, L = 1µH 30 30 0 0.5 1.0 1.5 2.0 2.5 3.0
007
0 0.5 1.0 1.5 2.0 2.5 3.0
010
OUTPUT CURRENT (A)
14794-
OUTPUT CURRENT (A)
14794- Figure 7. Efficiency at VIN = 24 V, fSW = 1.2 MHz Figure 10. Efficiency at VIN = 12 V, fSW = 1.2 MHz Rev. 0 | Page 8 of 24 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION 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 SYNCHRONIZATION 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 SLOPE COMPENSATION SETTING COMPENSATION DESIGN ADIsimPOWER DESIGN TOOL DESIGN EXAMPLE OUTPUT VOLTAGE SETTING FREQUENCY SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION SLOPE COMPENSATION SETTING COMPENSATION COMPONENTS SOFT START TIME PROGRAM INPUT CAPACITOR SELECTION RECOMMENDED EXTERNAL COMPONENTS PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATIONS CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE