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LM25145RGYR Scheda tecnica(PDF) 7 Page - Texas Instruments |
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LM25145RGYR Scheda tecnica(HTML) 7 Page - Texas Instruments |
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7 / 62 page  7 LM25145 www.ti.com SNVSAT9 – JUNE 2017 Product Folder Links: LM25145 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated (1) Recommended Operating Conditions are conditions under which the device is intended to be functional. For specifications and test conditions, see Electrical Characteristics. 7.3 Recommended Operating Conditions Over the recommended operating junction temperature range of –40°C to 125°C (unless otherwise noted). (1) MIN NOM MAX UNIT VI Input voltages VIN 6 42 V SW –1 42 ILIM –1 42 External VCC bias rail 8 13 EN/UVLO 0 42 VO Output voltages BST –0.3 55 V BST to VCC 42 BST to SW 5 13 PGOOD 13 ISINK, ISRC Sink/source currents SYNCOUT –1 1 mA PGOOD 2 TJ Operating junction temperature –40 125 °C (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report. 7.4 Thermal Information THERMAL METRIC(1) LM25145 UNIT RGY (VQFN) 20 PINS RθJA Junction-to-ambient thermal resistance 36.8 °C/W RθJC(top) Junction-to-case (top) thermal resistance 28 °C/W RθJB Junction-to-board thermal resistance 11.8 °C/W ψJT Junction-to-top characterization parameter 0.4 °C/W ψJB Junction-to-board characterization parameter 11.7 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance 2.1 °C/W (1) All minimum and maximum limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control. (2) The junction temperature (TJ in °C) is calculated from the ambient temperature (TA in °C) and power dissipation (PD in Watts) as follows: TJ = TA + (PD • RθJA) where RθJA (in °C/W) is the package thermal impedance provided in Thermal Information. 7.5 Electrical Characteristics Typical values correspond to TJ = 25°C. Minimum and maximum limits apply over the –40°C to 125°C junction temperature range unless otherwise stated. VIN = 24 V, VEN/UVLO = 1.5 V, RRT = 25 kΩ unless otherwise stated. (1) (2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT SUPPLY VIN Operating input voltage range 6 42 V IQ-RUN Operating input current, not switching VEN/UVLO = 1.5 V, VSS/TRK = 0 V 1.8 2.1 mA IQ-STBY Standby input current VEN/UVLO = 1 V 1.75 2 mA IQ-SDN Shutdown input current VEN/UVLO = 0 V, VVCC < 1 V 13.5 16 µA VCC REGULATOR VVCC VCC regulation voltage VSS/TRK = 0 V, 9 V ≤ VVIN ≤ 42 V, 0 mA < IVCC ≤ 20 mA 7.3 7.5 7.7 V VVCC-LDO VIN to VCC dropout voltage VVIN = 6 V, VSS/TRK = 0 V, IVCC = 20 mA 0.25 0.63 V ISC-LDO VCC short-circuit current VSS/TRK = 0 V, VVCC = 0 V 40 50 70 mA VVCC-UV VCC undervoltage threshold VVCC rising 4.8 4.93 5.2 V VVCC-UVH VCC undervoltage hysteresis Rising threshold – falling threshold 0.26 V |
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