Datasheet ADP1864 (Analog Devices) - 6

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ADP1864 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 0.810 0.8 VIN = 5V 0.7 COMP RISING 0.805 0.6 E (V) G A 0.5 LT (V) 0.800 P 0.4 E VO M C CO EN 0.3 COMP FALLING ER EF R 0.795 0.2 0.1
004 007
0.790
05562-
0
05562-
–40 –20 0 20 40 60 80 100 120 –40 –20 0 20 40 60 80 100 120 TEMPERATURE (°C) TEMPERATURE (°C)
Figure 3. Reference Voltage vs. Temperature Figure 6. COMP Shutdown Threshold vs. Temperature
600 2.52 VIN = 5V 2.50 590 ) 2.48 kHz 580 ( Y (V) NC 2.46 UT UE OV Q 570 RE F 2.44 560 2.42
005 008
550
05562-
2.40
05562-
–40 –20 0 20 40 60 80 100 120 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 TEMPERATURE (°C) LOAD (A)
Figure 4. Normalized Oscillator Frequency vs. Temperature Figure 7. Typical Load Regulation (VIN = 5 V; See Figure 1)
3.10 2.520 3.05 3.00 2.515 UVLO RISING 2.95 (V) (V) 2.90 2.510 IN UT V O UVLO FALLING V 2.85 2.80 2.505 2.75
006 009
2.70
05562-
2.500
05562-
–40 –20 0 20 40 60 80 100 120 3 5 7 9 11 13 TEMPERATURE (°C) VIN (V)
Figure 5. UVLO Voltage vs. Temperature (VIN Rising and VIN Falling) Figure 8. Typical Line Regulation vs. Input Voltage (See Figure 19) Rev. C | Page 6 of 16 Document Outline Features Applications General Description Typical Applications Diagram Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Loop Startup Short-Circuit Protection Undervoltage Lockout (UVLO) Overvoltage Lockout Protection (OVP) Soft Start Applications Information ADIsimPower Design Tool Duty Cycle Ripple Current Sense Resistor Inductor Value MOSFET Diode Input Capacitor Output Capacitor Feedback Resistors Layout Considerations Example Applications Circuits Outline Dimensions Ordering Guide