Datasheet ADM7172 (Analog Devices) - 8

ADM7172 Data Sheet 1.8 40 VIN = 2.3V ILOAD = 5mA 1.6 VIN = 2.5V I 35 LOAD = 10mA VIN = 3.5V ILOAD = 100mA 1.4 VIN = 4.0V ILOAD = 500mA A) V 30 µ IN = 5.0V ILOAD = 1000mA ( V 1.2 IN = 6.5V mA) ILOAD = 2000mA NT ( 25 NT 1.0 20 N CURRE 0.8 W 15 DO 0.6 UND CURRE RO HUT S G 10 0.4 0.2 5 0 0 –50 –25 0 25 50 75 100 125
010
4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4
013
TEMPERATURE (°C)
12250-
VIN (V)
12250- Figure 10. Shutdown Current vs. Temperature at Various Input Voltages Figure 13. Ground Current vs. Input Voltage (VIN) in Dropout, VOUT = 5 V
140 3.05 ILOAD = 100µA 3.04 ILOAD = 10mA 120 ILOAD = 100mA 3.03 ILOAD = 500mA ) I V LOAD = 1000mA I m 100 3.02 LOAD = 2000mA ( GE 3.01 80 (V) OLTA 3.00 UT O T V 60 V 2.99 OU OP 2.98 R 40 D 2.97 20 2.96 0 2.95
1
1 10 100 1000 10000
1 014 0
–40 –5 25 85 125 I JUNCTION TEMPERATURE (°C) LOAD (mA)
12250- 12250- Figure 11. Dropout Voltage vs. Load Current (ILOAD), VOUT = 5 V Figure 14. Output Voltage (VOUT) vs. Junction Temperature, VOUT = 3 V
5.10 3.05 5.05 3.04 5.00 3.03 4.95 3.02 4.90 3.01 (V) (V) 4.85 3.00 UT UT O O V V 4.80 2.99 ILOAD = 5mA 4.75 2.98 ILOAD = 10mA 4.70 ILOAD = 100mA 2.97 ILOAD = 500mA 4.65 ILOAD = 1000mA 2.96 ILOAD = 2000mA 4.60 2.95 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4
012
0.1 1 10 100 1000 10000
015
VIN (V) I
12250-
LOAD (mA)
12250- Figure 12. Output Voltage (VOUT) vs. Input Voltage (VIN) in Dropout, VOUT = 5 V Figure 15. Output Voltage (VOUT) vs. Load Current (ILOAD), VOUT = 3 V Rev. D | Page 8 of 23 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION ADISIMPOWER DESIGN TOOL CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties PROGRAMMABLE PRECISION ENABLE UNDERVOLTAGE LOCKOUT SOFT START NOISE REDUCTION OF THE ADM7172 IN ADJUSTABLE MODE EFFECT OF NOISE REDUCTION ON START-UP TIME CURRENT-LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS TYPICAL APPLICATIONS CIRCUITS PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE