Datasheet ADM7154 (Analog Devices) - 9

Data Sheet ADM7154 1.820 8 ILOAD = 1mA 1.815 ILOAD = 10mA 7 ILOAD = 100mA ILOAD = 200mA 1.810 I 6 LOAD = 400mA ILOAD = 600mA mA) ( 1.805 5 NT (V) 1.800 4 UT OV 1.795 3 UND CURRE RO ILOAD = 1mA 1.790 G 2 ILOAD = 10mA ILOAD = 100mA 1.785 1 ILOAD = 200mA ILOAD = 400mA ILOAD = 600mA 1.780 0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
017
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
020
VIN (V)
12324-
V IN (V)
12324- Figure 17. Output Voltage (VOUT) vs. Input Voltage (VIN) at Various Loads, Figure 20. Ground Current vs. Input Voltage (VIN) at Different Loads, VOUT = 1.8 V VOUT = 1.8 V
10 0 ILOAD = 100mA 9 ILOAD = 200mA –20 ILOAD = 400mA I 8 LOAD = 600mA –40 mA) 7 ( NT 6 B) –60 d 5 RR ( S –80 4 P UND CURRE RO 3 –100 G ILOAD = 1mA 2 ILOAD = 10mA ILOAD = 100mA I –120 1 LOAD = 200mA ILOAD = 400mA ILOAD = 600mA 0 –140 –40 –5 25 85 125
018
1 10 100 1k 10k 100k 1M 10M
021
JUNCTION TEMPERATURE (°C)
12324-
FREQUENCY (Hz)
12324- Figure 18. Ground Current vs. Junction Temperature (TJ) at Various Loads, Figure 21. Power Supply Rejection Ratio (PSRR) vs. Frequency at Various VOUT = 1.8 V Loads, VOUT = 3.3 V, VIN = 4.1 V
7 0 6 –20 5 –40 mA) ( NT 4 B) –60 d RR ( 3 S P –80 UND CURRE 800mV RO 2 –100 600mV G 500mV 400mV 300mV 1 –120 250mV 200mV 150mV 0 –140 1 10 100 1000
022 019
1 10 100 1k 10k 100k 1M 10M I FREQUENCY (Hz) LOAD (mA)
12324- 12324- Figure 19. Ground Current vs. Load Current (ILOAD), VOUT = 1.8 V Figure 22. Power Supply Rejection Ratio (PSRR) vs. Frequency at Various Headroom Voltages, VOUT = 3.3 V, 400 mA Load Rev. B | Page 9 of 23 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION ADIsimPOWER DESIGN TOOL CAPACITOR SELECTION Output Capacitor Input and VREG Capacitor REF Capacitor BYP Capacitor Capacitor Properties UNDERVOLTAGE LOCKOUT (UVLO) PROGRAMMABLE PRECISION ENABLE START-UP TIME REF, BYP, AND VREG PINS CURRENT-LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS Thermal Characterization Parameter (ΨJB) PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE