Datasheet LTC3892, LTC3892-1, LTC3892-2 (Analog Devices) - 8

LTC3892/ LTC3892-1/LTC3892-2
TYPICAL PERFORMANCE CHARACTERISTICS Inductor Current at Light Load Soft Start-Up
RUN1, 2 FORCED 5V/DIV CONTINUOUS MODE VOUT2 2V/DIV Burst Mode OPERATION VOUT1 1A/DIV 2V/DIV PULSE SKIPPING MODE 3892 G07 2µs/DIV 3892 G08 2ms/DIV VIN = 12V FIGURE 13 CIRCUIT VOUT = 5V ILOAD = 1mA FIGURE 13 CIRCUIT
Regulated Feedback Voltage vs DRVCC and EXTVCC Temperature vs Load Current
808 6.4 6.2 EXTV 806 CC = 0V 6 804 5.8 EXTVCC = 8.5V TAGE (mV) 5.6 802 5.4 TAGE (V) 800 5.2 VOL CC 5 798 EXTV DRV 4.8 CC = 5V TED FEEDBACK VOL 796 4.6 4.4 REGULA 794 4.2 VIN = 12V DRVSET = GND 792 4 -75 -50 -25 0 25 50 75 100 125 150 0 25 50 75 100 125 150 TEMPERATURE (°C) LOAD CURRENT (mA) 3892 G09 3892 G10
EXTVCC Switchover and DRVCC Undervoltage Lockout Voltages vs Temperature Threshold vs Temperature
11 8 DRV RISING CC (DRVSET = INTVCC) 7.5 10 7 DRVUV = INTVCC 9 6.5 FALLING DRVUV = INTV EXTV CC CC RISING 6 TAGE (V) 8 TAGE (V) 5.5 VOL EXTV 7 CC FALLING VOL CC CC 5 DRV DRVCC (DRVSET = 0V) 6 DRV 4.5 DRVUV = GND RISING DRVUV = GND 4 5 EXTVCC RISING 3.5 FALLING EXTV 4 CC FALLING 3 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) 3892 G11 3892 G12 38921fc 8 For more information www.linear.com/LTC3892 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Functional Diagrams Operation Package Description Typical Application Related Parts