Datasheet ADP1611 (Analog Devices) - 9

ADP1611 4 2 VIN = 5V CH1 = I V V L 2A/DIV IN = 5V OUT = 20V CH2 = V V C OUT 10V/DIV OUT = 20V OUT = 10
µ
F CH1 = I CH3 = S I LOAD 200mA/DIV L = 10
µ
H D 1V/DIV OUT = 200mA CH2 = V CH4 = COMP 2V/DIV C OUT 200mV/DIV F SS = 0F SW = 700kHz 2 RC = 400k
Ω
CC = 100pF 1 1
04906-022
CH1 10.0mV
Ω
CH2 200mV M2.00
µ
s A CH1 4.8mV 3
04906-024
CH1 10.0mV
Ω
CH2 10.0V M200
µ
s A CH3 680mV T 571.200
µ
s CH3 1.00V CH4 2.00V
Figure 22. Load Transient Response, 700 kHz, VOUT = 20 V Figure 24. Start-Up Response from Shutdown, CSS = 0 F
4 2 VIN = 5V CH1 = I V V L 2A/DIV IN = 5V OUT = 20V CH2 = V V C OUT 10V/DIV OUT = 20V OUT = 10
µ
F 2 CH3 = S I L = 10
µ
H D 1V/DIV OUT = 200mA CH1 = ILOAD 200mA/DIV CH4 = COMP 2V/DIV C F SS = 100nF SW = 1.2MHz CH2 = VOUT 200mV/DIV RC = 400k
Ω
CC = 100pF 1 1
04906-023
CH1 10.0mV
Ω
CH2 200mV M200
µ
s A CH1 7.20mV 3
04906-025
CH1 10.0mV
Ω
CH2 10.0V M400
µ
s A CH3 680mV T 488.000
µ
s CH3 1.00V CH4 2.00V
Figure 23. Load Transient Response, 1.2 MHz, VOUT = 20 V Figure 25. Start-Up Response from Shutdown, CSS = 100 nF Rev. 0 | Page 9 of 20 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CURRENT-MODE PWM OPERATION FREQUENCY SELECTION SOFT START ON/OFF CONTROL SETTING THE OUTPUT VOLTAGE INDUCTOR SELECTION CHOOSING THE INPUT AND OUTPUT CAPACITORS DIODE SELECTION LOOP COMPENSATION SOFT-START CAPACITOR APPLICATION CIRCUITS STEP-UP DC-TO-DC CONVERTER WITH TRUE SHUTDOWN TFT LCD BIAS SUPPLY SEPIC POWER SUPPLY LAYOUT PROCEDURE OUTLINE DIMENSIONS ORDERING GUIDE