Datasheet ADP1872, ADP1873 (Analog Devices) - 7

Data Sheet ADP1872/ADP1873 TYPICAL PERFORMANCE CHARACTERISTICS 100 100 VDD = 5.5V, VIN = 13V (PSM) VDD = 5.5V, VIN = 13V (PSM) V 95 V DD = 5.5V, VIN = 5.5V DD = 5.5V, VIN = 5.5V 95 V V DD = 5.5V, 90 DD = 5.5V, VIN = 5.5V (PSM) 90 VIN = 16.5V (PSM) 85 85 80 80 75 ) V VDD = 3.6V, VIN = 5.5V V 75 DD = 5.5V, ) DD = 5.5V, V V 70 DD = 3.6V, VIN = 5.5V V (% IN = 5.5V V IN = 16.5V DD = 5.5V, VIN = 13V (% V Y 70 (PSM) 65 Y (PSM) DD = 5.5V, VIN = 13V C V C DD = 3.6V, VIN = 13V 60 65 IEN IEN 55 VDD = 5.5V, VIN = 16.5V IC 60 VDD = 5.5V, VIN = 16.5V IC F F 50 V EF 55 DD = 3.6V, VIN = 16.5V EF 45 50 40 45 35 30 40 WURTH IND: 744355147, L = 0.47µH, DCR: 0.80mΩ 25 WURTH IND: 744355147, L = 0.47µH, DCR: 0.80mΩ 35 INFINEON FETs: BSC042N03MS G (UPPER/LOWER) 20 INFINEON FETs: BSC042N03MS G (UPPER/LOWER) T T 30 A = 25°C 15 A = 25°C 100 1k 10k 100k
04 07 0
100 1k 10k 100k
0 7- 7-
LOAD CURRENT (mA)
29
LOAD CURRENT (mA)
29 08 08 Figure 4. Efficiency—300 kHz, VOUT = 0.8 V Figure 7. Efficiency—600 kHz, VOUT = 0.8 V
100 100 VDD = 5.5V, VIN = 5.5V (PSM) V V 95 DD = 5.5V, VIN = 5.5V 95 DD = 5.5V, = VIN = 5.5(PSM) VDD = 5.5V, VIN = 5.5V 90 90 85 85 80 V 80 DD = 5.5V, VIN = 16.5V (PSM) VDD = 5.5V, VIN = 16.5V ) 75 ) 75 V V (% 70 DD = 5.5V, VIN = 16.5V (% 70 DD = 5.5V, VIN = 16.5V (PSM) Y Y C 65 C 65 V IEN DD = 5.5V, VIN = 13V (PSM) 60 IEN 60 IC IC V F 55 DD = 5.5V, VIN = 13V (PSM) V F DD = 3.6V, VIN = 3.6V 55 EF 50 EF 50 V V DD = 5.5V, VIN = 13V DD = 3.6V, VIN = 5.5V 45 45 40 V V 40 DD = 5.5V, VIN = 13V DD = 3.6V, VIN = 5.5V 35 WURTH IND: 744325120, L = 1.2µH, DCR: 1.8mΩ 35 WURTH IND: 744325120, L = 1.2µH, DCR: 1.8mΩ 30 INFINEON FETS: BSC042N03MS G (UPPER/LOWER) 30 INFINEON FETS: BSC042N03MS G (UPPER/LOWER) TA = 25°C TA = 25°C 25 25 100 1k 10k 100k
05 08 0
100 1k 10k 100k
0 7- 7-
LOAD CURRENT (mA)
29
LOAD CURRENT (mA)
29 08 08 Figure 5. Efficiency—300 kHz, VOUT = 1.8 V Figure 8. Efficiency—600 kHz, VOUT = 1.8 V
100 100 VDD = 5.5V, VDD = 3.6V,VIN = 13V 95 VDD = 5.5V, VIN = 16.5V (PSM) 95 VIN = 13V (PSM) 90 90 85 85 VDD = 5.5V, VIN = 13V 80 V 80 ) DD = 5.5V, VDD = 5.5V, VIN = 16.5V (PSM) 75 V ) IN = 16V 75 (% (PSM) (% V Y 70 Y 70 DD = 3.6V, VIN = 16.5V C C 65 65 IEN IEN V IC 60 IC DD = 5.5V, VIN = 16.5V F V 60 DD = 2.7V VDD = 3.6V VDD = 5.5V F EF 55 13VIN 13VIN 13VIN EF 55 50 16.5VIN 16.5VIN 16.5VIN 50 45 45 40 40 WURTH IND: 7443551200, L = 2µH, DCR: 2.6mΩ WURTH IND: 7443551200, L = 2µH, DCR: 2.6mΩ 35 INFINEON FETs: BSC042N03MS G (UPPER/LOWER) 35 INFINEON FETs: BSC042N03MS G (UPPER/LOWER) T T 30 A = 25°C 30 A = 25°C 100 1k 10k 100k
06 09 0
100 1k 10k 100k
0 7- 7-
LOAD CURRENT (mA)
29
LOAD CURRENT (mA)
29 08 08 Figure 6. Efficiency—300 kHz, VOUT = 7 V Figure 9. Efficiency—600 kHz, VOUT = 5 V Rev. B | Page 7 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