Datasheet ADP170, ADP171 (Analog Devices) - 9

Data Sheet ADP170/ADP171 –30 70 3V –40 60 50 –50 V) ) µ B d 40 1.8V ( –60 ISE ( 300mA O SSR P 200mA 30 S N 100mA M –70 10mA R 0.8V 1mA 20 –80 10
17 0 0 02 6- 6- 71 71 07
–90 0
07
10 100 1k 10k 100k 1M 10M 0.001 0.01 0.1 1 10 100 1000 FREQUENCY (Hz) LOAD CURRENT (mA)
Figure 17. Power Supply Rejection Ratio vs. Frequency, VOUT = 3.0 V Figure 20. RMS Noise vs. Load Current and Output Voltage
–30 3V, 1mA 1.8V, 1mA ILOAD 0.8V, 1mA –40 3V, 300mA 1mA TO 300mA LOAD STEP, 1.8V, 300mA 2.5A/µs 0.8V, 300mA 1 –50 ) B d ( –60 SSR V P OUT 2 –70 –80
1
V
18
IN = 3.6V
1 12 6-
V
6-
OUT = 1.8V
71 71 07
–90
07
10 100 1k 10k 100k 1M 10M CH1 200mA Ω CH2 50.0mV BW M40.00µs A CH1 124mA FREQUENCY (Hz) T 160.680µs
Figure 18. Power Supply Rejection Ratio vs. Frequency, Various Output Figure 21. Load Transient Response, CIN and COUT = 1 μF Voltages and Load Currents
10 ILOAD 1mA TO 300mA LOAD STEP, 2.5A/µs 1 1 z) 0.8V 1.8V rt (H 3.0V V µV/ OUT 2 0.1 VIN = 3.6V
9 2
V I IN = 3.6V LOAD = 10mA
01 12
V C
6- 6-
OUT = 1.8V OUT = 1µF
71 71
0.01
07 07
10 100 1k 10k 100k CH1 200mA Ω CH2 50.0mV BW M40.0µs A CH1 204mA FREQUENCY (Hz) T 159.800µs
Figure 19. Output Noise Spectrum Figure 22. Load Transient Response, CIN and COUT = 4.7 μF Rev. C | Page 9 of 20 Document Outline Features Applications Typical Application Circuits General Description Table of Contents Revision History Specifications Input and Output Capacitor, 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 Printed Circuit Board Layout Considerations Outline Dimensions Ordering Guide