Datasheet ADP1822 (Analog Devices) - 9

Data Sheet ADP1822 TYPICAL PERFORMANCE CHARACTERISTICS 97 0.6003 96 3.3V OUTPUT 0.6002 95 94 0.6001 E (V) %) G ( 93 A LT 0.6000 NCY 1.8V OUTPUT O E 92 ICI 0.5999 F F 91 E DBACK V 90 E E 0.5998 F 89 0.5997 88
106 009 1- 1
87
05311-
0.5996
053
0 2 4 6 8 10 12 14 16 –50 –30 –10 10 30 50 70 90 110 LOAD CURRENT (A) TEMPERATURE (°C)
Figure 5. Efficiency vs. Load Current, VIN = 5 V, VOUT = 3.3 V, 1.8 V Figure 8. FB Regulation Voltage vs. Temperature
94 700 92 600 ) 3.3V OUTPUT kHz 600kHz 90 ( 500 Y %) NC ( 88 UE 400 Q NCY 1.8V OUTPUT E RE ICI 86 F 300 F F NG 300kHz E CHI 84 IT 200 W S 82 100
007 010 1- 1
80
05311-
0
053
0 2 4 6 8 10 12 14 16 –50 0 50 100 LOAD CURRENT (A) TEMPERATURE (°C)
Figure 6. Efficiency vs. Load Current, VIN = 12 V, VOUT = 3.3 V, 1.8 V Figure 9. Switching Frequency vs. Temperature
1400 1200 OUTPUT VOLTAGE (20mV/DIV) 1000 A) µ ( NT 800 600 CC CURRE V 400 LOAD CURRENT (5A/DIV) 200
008 1- 1
0
053 05311-011
0 1 2 3 4 5 6 VCC VOLTAGE (V)
Figure 7. VCC Supply Current vs. Voltage Figure 10. Load Transient Response, 1.5 A to 15 A Rev. D | Page 9 of 24 Document Outline Features Applications General Description Revision History Specifications Absolute Maximum Ratings ESD Caution Simplified Block Diagram Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Current-Limit Scheme Output Voltage Margining Output Voltage Tracking Soft Start High-Side Driver (BST and DH) Low-Side Driver (DL) Input Voltage Range Setting the Output Voltage Switching Frequency Control Compensation Power-Good Indicator Shutdown Control Application Information Selecting the Input Capacitor Output LC Filter Selecting the MOSFETS Setting the Current Limit Feedback Voltage Divider Setting the Voltage Margin Compensating the Regulator Compensation Using the ESR Zero Compensation Using Feed-Forward Compensation Using Both the ESR and Feed-Forward Zeros Setting the Soft Start Period Synchronizing the Converter Setting the Output Voltage Tracking Application Circuits Outline Dimensions Ordering Guide