Datasheet ADP1706, ADP1707, ADP1708 (Analog Devices) - 10

ADP1706/ADP1707/ADP1708 Data Sheet 400 350 LOAD SWITCHED FROM 50mA TO 950mA 300 AND BACK TO 50mA V) 250 (m IV V T OUT /D OU 200 mV OP R 50 DV 150 100 VIN = 3.8V V 50 OUT = 1.6V
7 0 01
CIN = 4.7µF
02 0-
C
0- 64
OUT = 4.7µF
64
0
06 06
10 100 1000 TIME (20µs/DIV) ILOAD (mA)
Figure 16. Dropout Voltage vs. Load Current Figure 19. Load Transient Response, CIN = 4.7 μF, COUT = 4.7 μF
3.4 3.3 LOAD SWITCHED FROM 50mA TO 950mA 3.2 AND BACK TO 50mA 3.1 ) 3.0 IV VOUT (V T /D OU mV V 2.9 50 2.8 ILOAD = 10mA I 2.7 LOAD = 100mA ILOAD = 300mA VIN = 3.8V ILOAD = 500mA VOUT = 1.6V 2.6 I
8
LOAD = 750mA
1 01
CIN = 22μF
02
ILOAD = 1A
0-
C
0- 64
OUT = 22μF
64
2.5
06 06
3.0 3.2 3.4 3.6 3.8 4.0 TIME (20μs/DIV) VIN (V)
Figure 17. Output Voltage vs. Input Voltage (in Dropout) Figure 20. Load Transient Response, CIN = 22 μF, COUT = 22 μF
2500 ILOAD = 1A ILOAD = 750mA ILOAD = 500mA 2000 ILOAD = 300mA I IV LOAD = 100mA /D V I IN STEP FROM 4V TO 5V LOAD = 10mA 2V ) 1500 A (µ D I GN V 1000 /DI V V 20m OUT 500 VOUT = 3.3V CIN = 4.7μF
9 2 01
COUT = 4.7μF
02 0-
I
0- 64
LOAD = 1A
64
0
06 06
3.0 3.2 3.4 3.6 3.8 4.0 TIME (100μs/DIV) VIN (V)
Figure 18. Ground Current vs. Input Voltage (in Dropout) Figure 21. Line Transient Response Rev. A | Page 10 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUITS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION SOFT START FUNCTION (ADP1706) ADJUSTABLE OUTPUT VOLTAGE (ADP1708) TRACK MODE (ADP1707) ENABLE FEATURE APPLICATIONS INFORMATION CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties VOLTAGE TRACKING APPLICATIONS CURRENT LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE NOTES