Datasheet ADP7158 (Analog Devices) - 9

Data Sheet ADP7158 1.85 14 I ILOAD = 0mA LOAD = 0mA 13 1.84 I I LOAD = 10mA LOAD = 10mA 12 I I LOAD = 100mA 1.83 LOAD = 100mA I I 11 LOAD = 600mA LOAD = 600mA ILOAD = 1200mA 1.82 ILOAD = 1200mA 10 ILOAD = 2000mA ILOAD = 2000mA 9 1.81 8 (V) mA) 1.80 ( UT 7 O ND V 6 1.79 I G 5 1.78 4 1.77 3 2 1.76
017 020
1 1.75
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0 2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 2.3 2.6 2.9 3.2 3.5 3.8 4.1 4.4 4.7 5 5.3 5.6 VIN (V) VIN (V)
Figure 17. Output Voltage (VOUT) vs. Input Voltage (VIN) Figure 20. Ground Current (IGND) vs. Input Voltage (VIN) at Various Loads, VOUT = 1.8 V at Various Loads, VOUT = 1.8 V
14 0 13 I –10 LOAD = 10mA 12 ILOAD = 100mA I 11 –20 LOAD = 600mA ILOAD = 1200mA 10 –30 ILOAD = 2000mA 9 –40 8 B) d mA) ( 7 –50 ND RR ( 6 S I G P –60 5 I 4 LOAD = 0mA –70 ILOAD = 10mA 3 ILOAD = 100mA –80 2 ILOAD = 600mA ILOAD = 1200mA –90
018 021
1 ILOAD = 2000mA
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0 –100
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–40 –20 0 20 40 60 80 100 120 140 1 10 100 1k 10k 100k 1M 10M TEMPERATURE (ºC) FREQUENCY (Hz)
Figure 18. Ground Current (IGND) vs. Temperature Figure 21. Power Supply Rejection Ratio (PSRR) vs. Frequency at Various Loads, VOUT = 1.8 V at Various Loads, VOUT = 3.3 V, VIN = 4.0 V
14 0 13 –10 12 11 –20 10 900mV –30 800mV 9 700mV –40 600mV 8 B) d mA) 500mV ( 7 –50 ND RR ( S I G 6 P –60 5 4 –70 3 –80 2 –90
019 022
1
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0 –100
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0.1m 1m 10m 100m 1 10 1 10 100 1k 10k 100k 1M 10M I FREQUENCY (Hz) LOAD (A)
Figure 19. Ground Current (IGND) vs. Load Current (ILOAD), VOUT = 1.8 V Figure 22. PSRR vs. Frequency at Various Headroom Voltages, VOUT = 3.3 V, 2 A Load Rev. C | Page 9 of 22 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATION CIRCUIT TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS INPUT AND OUTPUT CAPACITORS, RECOMMENDED 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 UVLO PROGRAMMABLE PRECISION ENABLE START-UP TIME REF, BYP, AND VREG PINS CURRENT LIMIT AND THERMAL SHUTDOWN THERMAL CONSIDERATIONS Thermal Characterization Parameter (ΨJB) PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE