Datasheet ADP7112 (Analog Devices) - 10

ADP7112 Data Sheet 700 0 LOAD = 5mA LOAD = 10mA –10 600 LOAD = 50mA LOAD = 100mA –20 ) LOAD = 150mA A 500 LOAD = 200mA –30 (µ T N ) –40 B RE 400 (d UR R –50 C R 300 ND PS –60 U 10Hz RO –70 100Hz G 200 1kHz –80 10kHz 100 100kHz –90 1MHz 10MHz 0 –100
2
3.1 3.3 3.5 3.7 3.9
02
0.2 0.6 1.0 1.4 1.8 2.2 2.6 3.0
025 8-
VIN (V) HEADROOM VOLTAGE (V)
12508- 1250 Figure 22. Ground Current vs. Input Voltage (VIN) in Dropout, VOUT = 3.3 V Figure 25. Power Supply Rejection Ratio (PSRR) vs. Headroom Voltage, VOUT = 1.8 V, for Different Frequencies
300 0 VIN = 2.7V VIN = 5.0V V 250 IN = 10V V –20 IN = 20V ) A 200 –40 (µ ) B NT E 150 (d R –60 R URR 3.0V C PS 2.0V S S 100 –80 1.6V 1.4V 1.2V 1.0V 50 –100 800mV 700mV 600mV 500mV 0 –120 –40 –5 25 85 125
023 026 8-
10 100 1k 10k 100k 1M 10M
8-
TEMPERATURE (°C)
1250
FREQUENCY (Hz)
1250 Figure 23. Soft Start (SS) Current vs. Temperature, Multiple Input Voltages, Figure 26. Power Supply Rejection Ratio (PSRR) vs. Frequency, VOUT = 3.3 V, VOUT = 5 V for Various Headroom Voltages
0 0 3.0V 10Hz 100Hz –10 2.0V –10 1.6V 1kHz 1.4V 10kHz –20 1.2V –20 100kHz 1.0V 1MHz –30 800mV –30 10MHz 700mV ) –40 ) –40 B 600mV B (d (d R –50 R –50 R R PS –60 PS –60 –70 –70 –80 –80 –90 –90 –100 –100 1 10 100 1k 10k 100k 1M 10M
024
0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
027 8- 8-
FREQUENCY (Hz) HEADROOM VOLTAGE (V)
1250

1250 Figure 24. Power Supply Rejection Ratio (PSRR) vs. Frequency, VOUT = 1.8 V, Figure 27. Power Supply Rejection Ratio (PSRR) vs. Headroom Voltage, for Various Headroom Voltages

VOUT = 3.3 V, for Different Frequencies Rev. D | Page 10 of 21 Document Outline Features Applications Typical Application Circuits General Description Revision History Specifications Input and Output Capacitance, Recommended Specifications Absolute Maximum Ratings Thermal Data Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties Programable Precision Enable Soft Start Noise Reduction of the ADP7112 in Adjustable Mode Current-Limit and Thermal Overload Protection Effect of Noise Reduction on Start-Up Time Thermal Considerations PCB Layout Considerations Outline Dimensions Ordering Guide