Datasheet ADP1872, ADP1873 (Analog Devices) - 8

ADP1872/ADP1873 Data Sheet 100 0.8030 V 95 DD = 5.5V, VIN = 13V (PSM) VDD = 5.5V, VIN = 5.5V V 0.8025 DD = 5.5V, 90 VIN = 5.5V (PSM) 0.8020 85 0.8015 80 ) 0.8010 75 V ) ( E 70 V 0.8005 (% DD = 5.5V, G Y 65 VIN = 16.5V A 0.8000 C (PSM) V LT 60 DD = 5.5V, VIN = 16.5V O 0.7995 IEN VDD = 5.5V, VIN = 13V V IC 55 T 0.7990 F U V V 50 IN = 13V IN = 16.5V EF TP 0.7985 +125°C +125°C 45 VDD = 3.6V, VIN = 5.5V +25°C +25°C OU 0.7980 40 –40°C –40°C V 0.7975 35 DD = 3.6V, VIN = 3.6V VIN = 5.5V 30 0.7970 WURTH IND: 744303012, L = 0.12µH, DCR: 0.33mΩ +125°C 25 INFINEON FETs: BSC042N03MS G (UPPER/LOWER) 0.7965 +25°C T –40°C 20 A = 25°C 0.7960 100 1k 10k 100k
10 13 0
0 2000 4000 6000 8000 10,000 12,000 14,000 16,000
0 7- 7-
LOAD CURRENT (mA)
29
LOAD CURRENT (mA)
29 08 08 Figure 10. Efficiency—1.0 MHz, VOUT = 0.8 V Figure 13. Output Voltage Accuracy—300 kHz, VOUT = 0.8 V
100 1.821 V V 95 DD = 5.5V, DD = 5.5V, VIN = 5V (PSM) VIN = 16.5V (PSM) 90 1.816 85 V 80 DD = 5.5V, V V IN = 5V ) 1.811 75 DD = 5.5V, V V ) V DD = 5.5V, VIN = 16.5V IN = 13V ( E 70 (PSM) V (% DD = 3.6V, VIN = 13V G Y 65 V A 1.806 C DD = 3.6V, VIN = 16.5V LT 60 V O IEN DD = 5.5V, VIN = 13V V IC 55 T 1.801 F U 50 EF TP 45 OU 1.796 40 35 VIN = 5.5V VIN = 13V VIN = 16.5V 30 1.791 WURTH IND: 744303022, L = 0.22µH, DCR: 0.33mΩ +125°C +125°C +125°C 25 INFINEON FETs: BSC042N03MS G (UPPER/LOWER) +25°C +25°C +25°C T –40°C –40°C –40°C 20 A = 25°C 1.786 100 1k 10k 100k
11 14 0
0 1500 3000 4500 6000 7500 9000 10,500 12,000 13,500 15,000
0 7- 7-
LOAD CURRENT (mA)
29
LOAD CURRENT (mA)
29 08 08 Figure 11. Efficiency—1.0 MHz, VOUT = 1.8 V Figure 14. Output Voltage Accuracy—300 kHz, VOUT = 1.8 V
100 7.000 V 95 DD = 5.5V, VIN = 5V (PSM) VDD = 5.5V, VIN = 16.5V (PSM) VDD = 3.6V, VIN = 13V V 90 6.995 DD = 3.6V, VIN = 16.5V 85 6.990 80 V ) 75 DD = 5V, V ) VIN = 13V ( 6.985 E 70 (% G Y V 65 DD = 5V, VIN = 16.5V A C 6.980 LT 60 O IEN V IC 55 6.975 T F U 50 EF TP 45 6.970 OU 40 6.965 35 30 WURTH IND: 744325072, L = 0.72µH, DCR: 1.65mΩ 6.960 +125°C VDD = 5.5V, VIN = 13V 25 INFINEON FETs: BSC042N03MS G (UPPER/LOWER) +25°C T –40°C VDD = 5.5V, VIN = 16.5V 20 A = 25°C 6.955 100 1k 10k
12 15 0
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
0 7- 7-
LOAD CURRENT (mA)
29
LOAD CURRENT (mA)
29 08 08 Figure 12. Efficiency—1.0 MHz, VOUT = 4 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 ADP1872/ADP1873 Block Digram Theory of Operation Startup Soft Start Precision Enable Circuitry Undervoltage Lockout Thermal Shutdown Programming Resistor (RES) Detect Circuit Valley Current-Limit Setting Hiccup Mode During Short Circuit Synchronous Rectifier Power Saving Mode (PSM) Version (ADP1873) 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 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 Dual-Input, 300 kHz High Current Application Circuit Single-Input, 600 kHz Application Circuit Dual-Input, 300 kHz High Current Application Circuit Outline Dimensions Ordering Guide