Datasheet ADP2140 (Analog Devices) - 8

ADP2140 Data Sheet
VIN1 = 4 V, VOUT = 1.8 V, IOUT = 10 mA, CIN = COUT = 10 µF, TA = 25°C, unless otherwise noted.
1.82 3.350 1.81 ) 3.325 ) V V ( 1.80 ( GE GE OLTA 1.79 OLTA 3.300 T V T V U U TP 1.78 TP LOAD CURRENT = 1mA OU OU LOAD CURRENT = 10mA 3.275 LOAD CURRENT = 50mA 1.77 LOAD CURRENT = 100mA LOAD CURRENT = 300mA LOAD CURRENT = 600mA 1.76 3.250 2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
010
1 10 100 1000
013
INPUT VOLTAGE (V) LOAD CURRENT (mA)
07932- 07932- Figure 10. Line Regulation, VOUT = 1.8 V, Different Loads Figure 13. Load Regulation, VOUT = 3.3 V
1.82 100 90 1.81 80 ) V 70 ( 1.80 GE %) ( 60 OLTA 1.79 NCY 50 E T V ICI U F 40 F TP 1.78 E OU 30 2.5V 20 1.77 3.0V 4.0V 10 5.0V 5.5V 1.76 0 1 10 100 1000
011
1 10 100 1000
014
LOAD CURRENT (mA) LOAD CURRENT (mA)
07932- 07932- Figure 11. Load Regulation, VOUT = 1.8 V, VIN1 = 2.3 V Figure 14. Efficiency vs. Load Current, VOUT = 1.8 V, Different Input Voltages
1.22 100 90 1.21 80 ) V 70 ( GE %) 1.20 ( 60 OLTA NCY 50 E T V ICI U 1.19 F 40 F TP E OU 30 –40°C 1.18 20 –5°C +25°C 10 +85°C +125°C 1.17 0 1 10 100 1000
012
1 10 100 1000
015
LOAD CURRENT (mA) LOAD CURRENT (mA)
07932- 07932- Figure 12. Load Regulation, VOUT = 1.2 V, VIN1 = 2.3 V Figure 15. Efficiency vs. Load Current, VOUT = 1.8 V, Different Temperatures Rev. A | Page 8 of 32 Document Outline Features Applications General Description Typical Application Circuits Revision History Specifications Recommended Specifications: Capacitors and Inductor Pin Configuration and Function Descriptions Typical Performance Characteristics Buck Output LDO Output Theory of Operation Buck Section Control Scheme PWM Operation PSM Operation Pulse Skipping Threshold Selected Features Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit Power-Good Pin LDO Section Applications Information Power Sequencing Power-Good Function External Component Selection Selecting the Inductor Output Capacitor Input Capacitor Efficiency Power Switch Conduction Losses Inductor Losses Switching Losses Transition Losses Recommended Buck External Components LDO Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties LDO as a Postregulator to Reduce Buck Output Noise Thermal Considerations PCB Layout Considerations Outline Dimensions Ordering Guide