Datasheet ADP7157 (Analog Devices) - 8

ADP7157 Data Sheet 14 14 I 13 LOAD = 0mA I 13 LOAD = 10mA 12 ILOAD = 100mA 12 ILOAD = 600mA 11 ILOAD = 1200mA 11 10 10 9 9 8 8 mA) mA) ( 7 ( 7 ND ND 6 I G 6 I G 5 5 4 4 3 3 ILOAD = 0mA I 2 2 LOAD = 10mA ILOAD = 100mA 1 1 ILOAD = 600mA ILOAD = 1200mA 0 0 3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2 5.4 5.6
1 1
3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8
0 014
VIN (V) VIN (V)
12938- 12938- Figure 11. Ground Current (IGND) vs. Input Voltage (VIN) Figure 14. Ground Current (IGND) vs. Input Voltage (VIN) in Dropout, at Various Loads, VOUT = 3.3 V VOUT = 3.3 V
0.16 1.25 ILOAD = 0mA I 1.24 LOAD = 10mA 0.14 ILOAD = 100mA ILOAD = 600mA 1.23 ILOAD = 1200mA 0.12 1.22 0.10 (V) 1.21 UT (V) O 0.08 P 1.20 UT OV DROV 1.19 0.06 1.18 0.04 1.17 0.02 1.16 0 1.15 10m 100m 1 10
012
–40 –20 0 20 40 60 80 100 120 140
015
ILOAD (A) TEMPERATURE (°C)
12938- 12938- Figure 12. Dropout Voltage (VDROPOUT) vs. Load Current (ILOAD), VOUT = 3.3 V Figure 15. Output Voltage (VOUT) vs. Temperature at Various Loads, VOUT = 1.2 V
3.40 1.25 ILOAD = 0mA ILOAD = 10mA 1.24 3.35 ILOAD = 100mA ILOAD = 600mA I 1.23 LOAD = 1200mA 3.30 1.22 3.25 1.21 (V) (V) 3.20 UT 1.20 UT O O V V 1.19 3.15 1.18 3.10 1.17 3.05 1.16 3.00 1.15 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8
013
0.1m 1m 10m 100m 1 10
016
VIN (V) I
12938-
LOAD (A)
12938- Figure 13. Output Voltage (VOUT) vs. Input Voltage (VIN) in Dropout, Figure 16. Output Voltage (VOUT) vs. Load Current (ILOAD), VOUT = 1.2 V VOUT = 3.3 V Rev. B | Page 8 of 23 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATION CIRCUIT 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 SHUTDOWN THERMAL CONSIDERATIONS Thermal Characterization Parameter (ΨJB) PSRR PERFORMANCE PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE