Datasheet LTC3892, LTC3892-1, LTC3892-2 (Analog Devices) - 8
| Fabricante | Analog Devices |
| Descripción | 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller |
| Páginas / Página | 38 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. Inductor Current at Light Load. Soft … |
| Formato / tamaño de archivo | PDF / 1.4 Mb |
| Idioma del documento | Inglés |
TYPICAL PERFORMANCE CHARACTERISTICS. Inductor Current at Light Load. Soft Start-Up. Regulated Feedback Voltage vs
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Versión de texto del documento
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
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