Datasheet ADP1870, ADP1871 (Analog Devices) - 9

Data Sheet ADP1870/ADP1871 0.808 0.807 0.805 0.806 0.803 0.804 ) ) V 0.801 ( Hz E 0.802 k G ( A 0.799 Y LT NC 0.800 O 0.797 UE V T Q U 0.795 E 0.798 R TP 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 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
15 18 1
0 2000 4000 6000 8000 10,000
1 0- 0-
LOAD CURRENT (mA)
73
LOAD CURRENT (mA)
73 08 08 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 ) ) V 1.804 V ( 1.802 ( E 1.810 E 1.800 G G A 1.798 A 1.796 LT LT O 1.794 O 1.805 V 1.792 V T 1.790 T U U 1.788 TP 1.786 TP 1.800 OU 1.784 OU 1.782 1.780 1.778 VIN = 13V VIN = 16.5V 1.795 VIN = 13V VIN = 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 0 1500 3000 4500 6000 7500 9000 10,500 12,000
16 19 0
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
0 0- 0-
LOAD CURRENT (mA)
73
LOAD CURRENT (mA)
73 08 08 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 5.02 5.020 5.01 5.015 ) ) V 5.00 V ( 5.010 ( E E 4.99 G G A 5.005 A 4.98 LT LT O 5.000 O 4.97 V V T 4.995 T 4.96 U U TP TP 4.95 4.990 OU OU 4.94 4.985 4.93 4.980 VIN = 13V VIN = 16.5V 4.92 +125°C V +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 4.90 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
17 20 0
0 800 1600 2400 3200 4000 4800 5600 6400 7200 8000 8800 9600
0 0- 0-
LOAD CURRENT (mA)
73
LOAD CURRENT (mA)
73 08 08 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 44 Document Outline Features Applications General Description Typical Applications Circuit Revision History Specifications Absolute Maximum Ratings Thermal Resistance Boundary Condition ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics ADP1870/ADP1871 Block Diagram Theory of Operation Startup Soft Start Precision Enable Circuitry Undervoltage Lockout On-Board Low Dropout Regulator Thermal Shutdown Programming Resistor (RES) Detect Circuit Valley Current-Limit Setting Hiccup Mode During Short Circuit Synchronous Rectifier Power Saving Mode (PSM) Version (ADP1871) Timer Operation Pseudo-Fixed Frequency 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 Considerations Channel Conduction Loss MOSFET Driver Loss Switching Loss 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 Applications Circuits 15 A, 300 kHz High Current Application Circuit 5.5 V Input, 600 kHz Application Circuit 300 kHz High Current Application Circuit Outline Dimensions Ordering Guide