Datasheet LT8620 (Analog Devices) - 7

LT8620
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switching Waveforms, Full Bias Pin Current Bias Pin Current Frequency Continuous Operation
4.5 10 VBIAS = 5V VBIAS = 5V VOUT = 5V VOUT = 5V IL ILOAD = 1A 8 VIN = 12V 1A/DIV 4.0 fSW = 700kHz ILOAD = 1A 6 VSW 5V/DIV 3.5 4 500ns/DIV 8620 G30 BIAS PIN CURRENT (mA) 3.0 BIAS PIN CURRENT (mA) 12VIN TO 5VOUT AT 1A 2 2.5 0 5 15 25 35 45 55 65 0 0.5 1 1.5 2 2.5 INPUT VOLTAGE (V) SWITCHING FREQUENCY (MHz) 8620 G28 8620 G29
Switching Waveforms, Transient Response; Load Current Burst Mode Operation Switching Waveforms Stepped from 1A to 2A
IL IL 1A/DIV ILOAD 200mA/DIV 1A/DIV V V SW OUT V 100mV/DIV SW 20V/DIV 5V/DIV 2µs/DIV 8620 G31 500ns/DIV 8620 G32 50µs/DIV 8620 G33 12VIN TO 5VOUT AT 10mA 48VIN TO 5VOUT AT 1A 1A TO 2A TRANSIENT VSYNC = 0V 12VIN, 5VOUT COUT = 47µF
Transient Response; Load Current Stepped from 50mA (Burst Mode Operation) to 1A Start-Up Dropout Performance Start-Up Dropout Performance
ILOAD 1A/DIV VIN VIN VIN VIN V 2V/DIV 2V/DIV OUT 200mV/DIV V VOUT V OUT OUT VOUT 2V/DIV 2V/DIV 50µs/DIV 8620 G34 100ms/DIV 8620 G35 100ms/DIV 8620 G36 50mA (Burst Mode Operation) TO 1A TRANSIENT 2.5Ω LOAD 20Ω LOAD 12VIN, 5VOUT (2A IN REGULATION) (250mA IN REGULATION) COUT = 47µF 8620fa For more information www.linear.com/LT8620 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts