Datasheet ADP122, ADP123 (Analog Devices) - 9

Data Sheet ADP122/ADP123 –10 5 –20 IOUT = 100µA V –30 OUT = 4.2V IOUT = 1mA 4 IOUT = 10mA –40 ) V I OUT = 3.3V OUT = 100mA z I B) OUT = 200mA /√H d –50 v 3 IOUT = 300mA (µ RR ( S –60 ISE P O N 2 –70 –80 1 VOUT = 2.8V VIN = VOUT + 0.5V –90 VRIPPLE = 50mV
020 017
CIN = COUT 1µF 0
08399-
–100
08399-
10 100 1k 10k 100k 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) FREQUENCY (Hz)
Figure 21. Power Supply Rejection Ratio vs. Frequency, VOUT = 4.2 V, VIN = 4.7 V Figure 24. Output Noise Spectrum
–10 70 –20 65 V V OUT = 2.8V, IOUT = 1mA OUT = 4.2V V –30 OUT = 3.3V, IOUT = 1mA V 60 OUT = 4.2V, IOUT = 1mA V –40 OUT = 2.8V, IOUT = 300mA VOUT = 3.3V V V) OUT = 3.3V, IOUT = 300mA 55 B) V d –50 OUT = 4.2V, IOUT = 300mA ISE (µ O 50 RR ( S –60 P MS N 45 R VOUT = 2.8V –70 40 –80 VIN = VOUT + 0.5V VRIPPLE = 50mV C –90 IN = COUT 1µF 35
018 021
–100
08399-
30
08399-
10 100 1k 10k 100k 1M 10M 0.001 0.01 0.1 1 10 100 1000 FREQUENCY (Hz) IOUT (mA)
Figure 22. Power Supply Rejection Ratio vs. Frequency, Various Output Figure 25. Output Noise vs. Load Current and Output Voltage Voltages and Load Currents
–10 VIN = 3.1V, IOUT = 1mA V IOUT –20 IN = 3.3V, IOUT = 1mA VIN = 3.8V, IOUT = 1mA V 1mA TO 300mA LOAD STEP IN = 4.8V, IOUT = 1mA –30 VIN = 3.1V, IOUT = 300mA 1 VIN = 3.3V, IOUT = 300mA V –40 IN = 3.8V, IOUT = 300mA VIN = 4.8V, IOUT = 300mA B) d –50 RR ( S –60 V P OUT 2 –70 –80 VRIPPLE = 50mV CIN = COUT 1µF VIN = 3.7V –90
022
V
019
OUT = 3.3V
08399-
–100
08399-
CH1 200mA Ω B CH2 50.0mV B M 40.0µs A CH1 196mA 10 100 1k 10k 100k 1M 10M W W T 10.20% FREQUENCY (Hz)
Figure 23. Power Supply Rejection Ratio vs. Headroom Voltage (V Figure 26. Load Transient Response, C IN − VOUT), OUT = 1 μF VOUT = 2.8 V Rev. E | Page 9 of 24 Document Outline Features Applications General Description Typical Application Circuits Revision History Specifications Recommended Specifications Absolute Maximum Ratings Thermal Data Thermal Resistance ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties Undervoltage Lockout Enable Feature Current Limit and Thermal Overload Protection Thermal Considerations Junction Temperature Calculations For TSOT Package Junction Temperature Calculations For LFCSP Package Printed Circuit Board Layout Considerations Outline Dimensions Ordering Guide