Datasheet ADP1878, ADP1879 (Analog Devices) - 9

Data Sheet ADP1878/ADP1879 0.808 0.807 0.805 0.806 0.803 0.804 ) ) V 0.801 ( Hz E 0.802 k G ( 0.799 LTA NCY 0.800 O 0.797 UE V T Q U 0.795 0.798 P RE T F OU 0.793 0.796 0.791 VIN = 13V VIN = 16.5V 0.794 +125°C V +125°C +125°C 0.789 +25°C IN = 13V +25°C +25°C –40°C VIN = 16.5V –40°C –40°C 0.792 0.787
6 9
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
-01
0 2000 4000 6000 8000 10,000
-01 41 41
LOAD CURRENT (mA) LOAD CURRENT (mA)
094 094 Figure 16. Output Voltage Accuracy—600 kHz, VOUT = 0.8 V Figure 19. Output Voltage Accuracy—1.0 MHz, VOUT = 0.8 V
1.818 1.820 1.816 1.814 1.812 1.810 1.815 1.808 1.806 ) ) 1.804 (V 1.802 (V 1.810 E E 1.800 G G A 1.798 A 1.796 LT LT O 1.794 O 1.805 1.792 T V T V 1.790 U U 1.788 TP TP 1.786 U 1.800 U O 1.784 O 1.782 1.780 1.778 V V V IN = 13V VIN = 16.5V 1.795 IN = 13V IN = 16.5V 1.776 +125°C +125°C +125°C +125°C 1.774 +25°C +25°C +25°C +25°C 1.772 –40°C –40°C –40°C –40°C 1.770 1.790
7 0
0 1500 3000 4500 6000 7500 9000 10,500 12,000 0 1000 2000 3000 4000 5000 6000 7000 8000 9000
-01
0 10,000
-02 41 41
LOAD CURRENT (mA) LOAD CURRENT (mA)
094 094 Figure 17. Output Voltage Accuracy—600 kHz, VOUT = 1.8 V Figure 20. Output Voltage Accuracy—1.0 MHz, VOUT = 1.8 V
5.030 5.04 5.025 5.03 5.020 5.02 5.01 5.015 ) ) V 5.00 ( 5.010 (V E E 4.99 G G 5.005 A 4.98 LTA LT O 5.000 O 4.97 V T 4.995 T V 4.96 U U P T 4.990 TP 4.95 U OU O 4.94 4.985 4.93 4.980 VIN = 13V VIN = 16.5V +125°C V 4.92 +125°C +125°C IN = 13V 4.975 +25°C V +25°C +25°C IN = 16.5V 4.91 –40°C V –40°C –40°C 4.970 IN = 20V
8
4.90
1
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
-01
0 800 1600 2400 3200 4000 4800 5600 6400 7200 8000 8800 9600
-02 41 41
LOAD CURRENT (mA) LOAD CURRENT (mA)
094 094 Figure 18. Output Voltage Accuracy—600 kHz, VOUT = 5 V Figure 21. Output Voltage Accuracy—1.0 MHz, VOUT = 5 V Rev. B | Page 9 of 40 Document Outline Features Applications Typical Applications Circuit General Description Revision History Specifications Absolute Maximum Ratings Thermal Resistance Boundary Condition ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Block Diagram Startup Soft Start Precision Enable Circuitry Undervoltage Lockout On-Board Low Dropout (LDO) Regulator Thermal Shutdown Programming Resistor (RES) Detect Circuit Valley Current-Limit Setting Hiccup Mode During Short Circuit Synchronous Rectifier ADP1879 Power Saving Mode (PSM) Timer Operation Pseudo Fixed Frequency Power-Good Monitoring Applications Information Feedback Resistor Divider Inductor Selection Output Ripple Voltage (ΔVRR) Output Capacitor Selection Compensation Network Output Filter Impedance (ZFILT) Error Amplifier Output Impedance (ZCOMP) Error Amplifier Gain (Gm) Current-Sense Loop Gain (GCS) Crossover Frequency Efficiency Consideration Channel Conduction Loss MOSFET Driver Loss MOSFET Switching Loss Body Diode Conduction Loss Inductor Loss Input Capacitor Selection Thermal Considerations Design Example Input Capacitor Inductor Current-Limit Programming Output Capacitor Feedback Resistor Network Setup Compensation Network Loss Calculations External Component Recommendations Layout Considerations IC Section (Left Side of Evaluation Board) Power Section Differential Sensing Typical Application Circuits 12 A, 300 kHz High Current Application Circuit 5.5 V Input, 600 kHz Current Application Circuit 300 kHz High Current Application Circuit Packaging and Ordering Information Outline Dimensions Ordering Guide