Datasheet ADP124, ADP125 (Analog Devices) - 9

Data Sheet ADP124/ADP125 –10 5 –20 IOUT = 100µA V –30 I OUT = 4.2V OUT = 1mA I 4 OUT = 10mA –40 IOUT = 100mA ) VOUT = 3.3V ) I B OUT = 300mA d I ( –50 OUT = 500mA v/√Hz 3 R (µ E –60 PSR IS NO 2 –70 –80 1 V V OUT = 2.8V IN = VOUT + 1V
0
–90 VRIPPLE = 50mV
17 02
C
0 6-
IN = COUT = 1µF
6- 47 47
–100 0
08 08
10 100 1k 10k 100k 1M 10M 10 100 1k 10k 100k FREQUENCY (Hz) FREQUENCY (Hz)
Figure 19. Power Supply Rejection Ratio vs. Frequency, VOUT = 4.2 V, VIN = 5.2 V Figure 22. Output Noise Spectrum, VIN = 5 V
–10 70 V V –20 OUT = 2.8V, IOUT = 10mA 65 OUT = 4.2V VOUT = 3.3V, IOUT = 10mA VOUT = 4.2V, IOUT = 10mA –30 60 VOUT = 2.8V, IOUT = 500mA V VOUT = 3.3V OUT = 3.3V, IOUT = 500mA 55 –40 VOUT = 4.2V, IOUT = 500mA ) ) V B µ 50 d ( ( –50 E R IS 45 VOUT = 2.8V –60 PSR NO S 40 –70 RM 35 –80 30 VIN = VOUT + 1V –90 VRIPPLE = 50mV
1 18
25
2
C
0 0
IN = COUT = 1µF
6- 6- 47 47
–100
08
20
08
10 100 1k 10k 100k 1M 10M 0.001 0.01 0.1 1 10 100 1k FREQUENCY (Hz) ILOAD (mA)
Figure 20. Power Supply Rejection Ratio vs. Frequency, Figure 23. Output Noise vs. Load Current and Output Voltage, VIN = 5 V Various Output Voltages and Load Currents
–10 V I IN = 3.1V, IOUT = 10mA OUT –20 VIN = 3.3V, IOUT = 10mA VIN = 3.8V, IOUT = 10mA 1mA TO 500mA LOAD STEP –30 VIN = 4.8V, IOUT = 10mA 1 –40 ) B d –50 RR ( –60 S P VOUT 2 –70 –80 VIN = 3.1V, IOUT = 500mA VIN = 3.3V, IOUT = 500mA VIN = 4V –90 V
2
IN = 3.8V, IOUT = 500mA
9
VOUT = 3.3V
02
V
01
IN = 4.8V, IOUT = 500mA
6- 6- 47
–100
47 08 08
10 100 1k 10k 100k 1M 10M CH1 500mA Ω B M40.0µs A CH1 200mA W CH2 50.0mV BW FREQUENCY (Hz) T 9.800%
Figure 21. Power Supply Rejection Ratio vs. Headroom Voltage (VIN − VOUT), Figure 24. Load Transient Response, COUT = 1 μF VOUT = 2.8 V Rev. D | Page 9 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUITS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS RECOMMENDED CAPACITOR 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 PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE