Datasheet ADP1720 (Analog Devices) - 9

ADP1720 0 VIN = 8V –10 VOUT = 5V COUT = 1µF V –20 RIPPLE = 50mV VIN STEP FROM 6V TO 7V –30 VOUT = 5V –40 1mA B) CIN = 1µF d 10mA ( COUT = 1µF –50 I RR IV LOAD = 50mA S 1 P /D –60 2V 100µA –70 IV VOUT –80 /D V 2 m –90
15 0
10
1- 11 17 0
–100
06 1-
10 100 1k 10k 100k 1M 10M
11 06
FREQUENCY (Hz) TIME (100µs/DIV)
Figure 15. Power Supply Rejection Ratio vs. Frequency Figure 17. Line Transient Response (5.0 V Fixed Output)
VIN = 12V VOUT = 1.6V CIN = 1µF C EN OUT = 1µF IV LOAD STEP FROM 2.5mA TO 47.5mA /D 1 5V V V /DI OUT 1 10mV VOUT VIN = 12V VOUT = 5V IV C D IN = 1µF
16
2
18 0
COUT = 1µF
0 1-
2V/ I
1- 11
LOAD = 50mA
11 06 06
TIME (20µs/DIV) TIME (40µs/DIV)
Figure 16. Load Transient Response Figure 18. Start-Up Time Rev. A | Page 9 of 16 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUITS GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION ADJUSTABLE OUTPUT VOLTAGE(ADP1720 ADJUSTABLE) APPLICATIONS INFORMATION CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties CURRENT LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE