Datasheet ADP3050 (Analog Devices) - 7

Data Sheet ADP3050 100 0.6 VIN = 5V VOUT = 3.3V 90 0.4 80 %) ( E 70 0.2 %) ( 60 VIN = 12V VIN = 24V CHANG V I N = 30V E LOAD = 100mA NCY 50 V E IN = 18V AG 0 T I ICI L LOAD = 1A F 40 F O E V 0.2 30 UT P UT 20 L = 33µH O 0.4 CIN = 22µF 10 COUT = 100µF 0 0.6
012
0 200 400 600 800 1k
009
0 10 20 30 OUTPUT CURRENT (mA)
00125- 00125-
INPUT VOLTAGE (V)
Figure 9. 3.3 V Output Efficiency Figure 12. 3.3 V Output Voltage Change vs. Input Voltage
0.5 8 V 0.4 IN = 10V ILOAD = 1A 7 %) 0.3 ( E E (V) 0.2 G V A 6 OUT = 5V T 0.1 L CHANG E VO 0 T 5 AG T PU L N O –0.1 V M I 4 UT –0.2 IMU VOUT = 3.3V P N UT MI O –0.3 3 –0.4 –0.5
010
2 –45 –35 –25 –15 –5 5 15 25 35 45 55 65 75 85 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
013
TEMPERATURE (°C)
00125-
LOAD CURRENT (A)
00125- Figure 10. Output Voltage Change vs. Temperature Figure 13. Minimum Input Voltage vs. Load Current
0.6 0 VOUT = 5V VIN = 10V –0.02 0.4 %) %) ( ( –0.04 E E 0.2 –0.06 CHANG CHANG E I –0.08 LOAD = 1A E AG 0 AG T I T L LOAD = 100mA L –0.10 O O V V 0.2 –0.12 UT UT P P UT UT –0.14 O O 0.4 –0.16
1 1
0.6
0
–0.18 0 10 20 30 0
014
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
00125-
INPUT VOLTAGE (V) LOAD CURRENT(A)
00125- Figure 11. 5 V Output Voltage Change vs. Input Voltage Figure 14. Load Regulation Rev. C | Page 7 of 20 Document Outline Features Applications Functional Block Diagram General Description Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Setting the Output Voltage Applications Information ADIsimPower Design Tool Inductor Selection Continuous Mode Discontinuous Mode Inductor Core Types and Materials Choosing an Inductor Output Capacitor Selection Choosing an Output Capacitor Catch Diode Selection Choosing a Catch Diode Input Capacitor Selection Discontinous Mode Ringing Setting the Output Voltage Frequency Compensation Current Limit/Frequency Foldback Bias Pin Connection Boosted Drive Stage Start-Up/Minimum Input Voltage Thermal Considerations Board Layout Guidelines Typical Applications 5 V to 3.3 V Buck (Step-Down) Regulator Inverting (Buck Boost) Regulator Dual Output SEPIC Regulator Outline Dimensions Ordering Guide