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LM2854MHX-500 Folha de dados(PDF) 5 Page - Texas Instruments |
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LM2854MHX-500 Folha de dados(HTML) 5 Page - Texas Instruments |
5 / 33 page 5 LM2854 www.ti.com SNVS560D – MARCH 2008 – REVISED JANUARY 2016 Product Folder Links: LM2854 Submit Documentation Feedback Copyright © 2008–2016, Texas Instruments Incorporated (1) Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL). (2) Typical numbers are at 25°C and represent the most likely parametric norm. (3) VREF measured in a non-switching, closed-loop configuration. 6.5 Electrical Characteristics All Typical specifications are for TJ = 25°C only; all Maximum and Minimum limits apply over the operating junction temperature range TJ range of –40°C to 125°C. Minimum and maximum limits are ensured through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. AVIN = PVIN = EN = 5 V, unless otherwise indicated in the Test Conditions column. PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT SYSTEM PARAMETERS VREF Reference Voltage(3) Measured at the FB pin 0.790 0.8 0.808 V ΔVREF/ΔAVIN Line Regulation(3) ΔAVIN = 2.95 V to 5.50 V 0.04% 0.6% ΔVREF/ΔIO Load Regulation Normal operation 0.25 mV/A VON UVLO Threshold (AVIN) Rising 2.6 2.95 V Falling hysteresis 25 170 375 mV RDS(ON)-P PFET On Resistance ISW = 4 A 35 65 m Ω RDS(ON)-N NFET On Resistance ISW = 4 A 34 65 m Ω ISS Soft-Start Current 2 µA ICL Peak Current Limit Threshold 4.5 6 6.7 A IQ Operating Current Non-switching 1.7 3 mA ISD Shut Down Quiescent Current EN = 0 V 230 500 µA PWM SECTION fSW Switching Frequency 1-MHz option 800 1050 1160 kHz 500-kHz option 400 525 580 kHz Drange PWM Duty Cycle Range 0% 100% ENABLE CONTROL VIH EN Pin Rising Threshold 0.8 1.23 1.65 V VEN(HYS) EN Pin Hysteresis 150 mV THERMAL CONTROL TSD TJ for Thermal Shutdown 165 °C TSD-HYS Hysteresis for Thermal Shutdown 10 °C |
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