Datasheet ADP3050 (Analog Devices) - 9

Data Sheet ADP3050 57.6 220 VIN = 10V 48.0 200 VOUT = 5V R V LOAD = 19Ω OUT = 1V/DIV 38.4 180 L = 33µH COILTRONICS NO LOAD UP2B-330 28.8 160 CIN = 22µF B) C d OUT = 100µF ( 19.2 140 rees) UDE Deg T 9.6 120 ( NI E 0 100 AG HAS M P IL = 500mA/DIV –9.6 80 0V –19.2 60 0A –28.8 40 –38.4 20
023 021
1 100 1k 10k 100k 1M
00125-
TIME (100µs/DIV) FREQUENCY (Hz)
00125- Figure 21. Start-Up from Shutdown Figure 23. Error Amplifier Gain
1500 VIN = 10V, NO LOAD 1450 ) o 1400 h M µ 1350 ( 1300 ANCE 1250 NDUCT 1200 CO 1150 RANS T 1100 1050 1000
022
–45 –35 –25 –15 –5 5 15 25 35 45 55 65 75 85 TEMPERATURE (°C)
00125- Figure 22. Error Amplifier Transconductance vs. Temperature Rev. C | Page 9 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