Datasheet ADP1611 (Analog Devices) - 6

ADP1611 TYPICAL PERFORMANCE CHARACTERISTICS 100 100 VIN = 5V VIN = 3.3V V F OUT = 10V SW = 700kHz FSW = 1.2MHz VOUT = 5V L = 10
µ
H 90 L = 4.7
µ
H 90 V V OUT = 20V OUT = 13V 80 V 80 OUT = 15V VOUT = 8.5V (%) (%) 70 NCY 70 NCY 60 FFICIE FFICIE E E 60 50 50 40 40
04906-004
30
04906-007
1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA)
Figure 4. Output Efficiency vs. Load Current Figure 7. Output Efficiency vs. Load Current
100 2.8 VIN = 5V VOUT = 10V V F OUT = 10V SW = 1.2MHz 2.6 90 L = 6.8
µ
H V V OUT = 20V IN = 5.5V 2.4 80 VOUT = 15V 2.2 VIN = 3.3V (%) 70 NCY 2.0 V NT LIMIT (A) IN = 2.5V 60 FFICIE 1.8 E CURRE 50 1.6 40 1.4 30
04906-005
1.2
04906-008
1 10 100 1000 –40 –15 10 35 60 85 LOAD CURRENT (mA) AMBIENT TEMPERATURE (
°
C)
Figure 5. Output Efficiency vs. Load Current Figure 8. Current Limit vs. Ambient Temperature, VOUT = 10 V
95 1.4 VIN = 3.3V VOUT = 5V F RT = V 90 SW = 700kHz IN L = 10
µ
H V 1.2 OUT = 13V 85 (MHz) 1.0 80 NCY (%) VOUT = 8.5V UE 75 Q 0.8 NCY RT = GND 70 FRE 0.6 FFICIE E 65 0.4 60 CILLATORY OS 0.2 55 VOUT = 10V VIN = 3.3V 50
04906-006
0
04906-009
1 10 100 1000 –40 –15 10 35 60 85 LOAD CURRENT (mA) AMBIENT TEMPERATURE (
°
C)
Figure 6. Output Efficiency vs. Load Current Figure 9. Oscillatory Frequency vs. Ambient Temperature Rev. 0 | Page 6 of 20 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CURRENT-MODE PWM OPERATION FREQUENCY SELECTION SOFT START ON/OFF CONTROL SETTING THE OUTPUT VOLTAGE INDUCTOR SELECTION CHOOSING THE INPUT AND OUTPUT CAPACITORS DIODE SELECTION LOOP COMPENSATION SOFT-START CAPACITOR APPLICATION CIRCUITS STEP-UP DC-TO-DC CONVERTER WITH TRUE SHUTDOWN TFT LCD BIAS SUPPLY SEPIC POWER SUPPLY LAYOUT PROCEDURE OUTLINE DIMENSIONS ORDERING GUIDE