Datasheet ADP1878, ADP1879 (Analog Devices) - 8

ADP1878/ADP1879 Data Sheet 100 0.807 95 0.806 90 VIN = 13V 85 0.805 80 0.804 75 ) 0.803 70 V ) ( 65 V 0.802 % IN = 13V (PSM) E ( 60 G 0.801 55 VIN = 16.5V NCY LTA 0.800 50 E O 45 V 0.799 ICI T F 40 U F 0.798 P E 35 T T A = 25°C 0.797 30 VOUT = 0.8V V OU 25 IN = 16.5V (PSM) f 0.796 SW = 1.0MHz 20 0.795 15 WÜRTH INDUCTOR: VIN = 13V VIN = 16.5V 744303012, L = 0.12µH, DCR = 0.33mΩ 0.794 10 +125°C +125°C INFINEON FETs: +25°C +25°C 5 0.793 BSC042N03MS G (UPPER/LOWER) –40°C –40°C 0 0.792
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10 100 1k 10k 100k
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0 2000 4000 6000 8000 10,000
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LOAD CURRENT (mA) LOAD CURRENT (mA)
094 094 Figure 10. Efficiency—1.0 MHz, VOUT = 0.8 V Figure 13. Output Voltage Accuracy—300 kHz, VOUT = 0.8 V
100 1.821 95 V 90 IN = 13V 85 1.816 80 V 75 IN = 13V (PSM) ) 70 1.811 ) (V 65 E % ( 60 G A 1.806 55 NCY LT 50 E O 45 ICI VIN = 16.5V T V 1.801 F 40 U F VIN = 16.5V (PSM) E 35 T TP A = 25°C 30 U VOUT = 1.8V O 1.796 25 fSW = 1.0MHz 20 V V V 15 WÜRTH INDUCTOR: IN = 5.5V IN = 13V IN = 16.5V 744303022, L = 0.22µH, DCR = 0.33mΩ 1.791 +125°C +125°C +125°C 10 INFINEON FETs: +25°C +25°C +25°C 5 BSC042N03MS G (UPPER/LOWER) –40°C –40°C –40°C 0 1.786
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10 100 1k 10k 100k 0 1500 3000 4500 6000 7500 9000 10,500 12,000 13,500 15,000
-01 -01 41 41
LOAD CURRENT (mA) LOAD CURRENT (mA)
094 094 Figure 11. Efficiency—1.0 MHz, VOUT = 1.8 V Figure 14. Output Voltage Accuracy—300 kHz, VOUT = 1.8 V
100 7.100 95 7.095 90 7.090 85 V 7.085 80 IN = 13V (PSM) 7.080 75 7.075 ) 70 V 7.070 ) ( 65 E 7.065 % ( 60 G 7.060 55 V 7.055 LTA NCY IN = 16.5V (PSM) VIN = 13V 50 E O 7.050 45 V ICI VIN = 16.5V 7.045 T F 40 U 7.040 F P E 35 T T 7.035 A = 25°C 30 V 7.030 OUT = 5V OU 25 f 7.025 SW = 1.0MHz 20 7.020 15 WÜRTH INDUCTOR: 7.015 744355090, L = 0.9µH, DCR = 1.6mΩ 10 7.010 +125°C V INFINEON FETs: IN = 13V 5 +25°C BSC042N03MS G (UPPER/LOWER) 7.005 –40°C VIN = 16.5V 0 7.000
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10 100 1k 10k 100k 0 1000 2000 3000 4000 5000 6000 7000 8000 9000
-01 -01 41 41
LOAD CURRENT (mA) LOAD CURRENT (mA)
094 094 Figure 12. Efficiency—1.0 MHz, VOUT = 5 V Figure 15. Output Voltage Accuracy—300 kHz, VOUT = 7 V Rev. B | Page 8 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