Datasheet LTC3539, LTC3539-2 (Analog Devices) - 5

LTC3539/LTC3539-2
TYPICAL PERFORMANCE CHARACTERISTICS RDS(ON) vs VOUT RDS(ON) Change vs Temperature VFB vs Temperature
0.30 1.3 0.50 0.25 1.2 0.25 (Ω) 0.20 1.1 PMOS (%) 0 FB (Ω) DS(ON) 0.15 1.0 –0.25 R DS(ON) 0.10 0.9 CHANGE IN V –0.50 NMOS NORMALIZED R 0.05 0.8 –0.75 0 0.7 –1.00 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 –50 –30 –10 10 30 50 70 90 –60 –40 –20 0 20 40 60 80 100 VOUT (V) TEMPERATURE (°C) TEMPERATURE (°C) 3539 G09 3539 G10 3539 G11
Start-Up Voltage vs Temperature Fixed Frequency SW and IL(AC) Burst Mode SW and IL(AC)
0.80 SW PIN SW PIN 0.75 2V/DIV 5V/DIV 1mA LOAD VOUT VOUT 0.70 20mV/DIV 20mV/DIV AC-COUPLED AC-COUPLED (V) INDUCTOR INDUCTOR 0.65 V IN CURRENT CURRENT NO LOAD 500mA/DIV 200mA/DIV 500ns/DIV 3539 G13 5µs/DIV 3539 G14 0.60 VIN = 2.4V VIN = 3.3V VOUT = 3.3V AT 400mA VOUT = 5V 0.55 COUT = 22µF COUT = 22µF 0.50–50 –25 0 25 50 75 100 TEMPERATURE (°C) 3539 G12
Load Step, Fixed Frequency Load Step, Burst Mode Operation
VOUT VOUT 50mV/DIV 50mV/DIV AC-COUPLED AC-COUPLED LOAD LOAD CURRENT CURRENT 200mA/DIV 200mA/DIV 500µs/DIV 3539 G15 500µs/DIV 3539 G16 VIN = 2.4V VIN = 2.4V VOUT = 3.3V VOUT = 3.3V COUT = 22µF COUT = 22µF ILOAD = 100mA TO 250mA STEP ILOAD = 20mA TO 170mA 35392fc For more information www.linear.com/3539/3539-2 5 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 Revision History Related Parts