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LM2672M-3.3 数据表(PDF) 5 Page - Texas Instruments |
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LM2672M-3.3 数据表(HTML) 5 Page - Texas Instruments |
5 / 33 page LM2672 www.ti.com SNVS136K – SEPTEMBER 1998 – REVISED APRIL 2013 All Output Voltage Versions (continued) Specifications with standard type face are for TJ = 25°C, and those in bold type face apply over full Operating Temperature Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable versions and VIN = 24V for the 12V version, and ILOAD = 100 mA. Symbol Parameters Conditions Typ Min Max Units VS/D ON/OFF Pin 1.4 0.8 2.0 V Voltage Thesholds IS/D ON/OFF Pin Current ON/OFF Pin = 0V 20 7 37 μA FSYNC Synchronization Frequency VSYNC = 3.5V, 50% duty cycle 400 kHz VSYNC Synchronization Threshold 1.4 V Voltage VSS Soft-Start Voltage 0.63 0.53 0.73 V ISS Soft-Start Current 4.5 1.5 6.9 μA θJA Thermal Resistance PDIP Package, Junction to Ambient(1) 95 °C/W D Package, Junction to Ambient(1) 105 (1) Junction to ambient thermal resistance with approximately 1 square inch of printed circuit board copper surrounding the leads. Additional copper area will lower thermal resistance further. See Application Information section in the application note accompanying this datasheet and the thermal model in LM267X Made Simple version 6.0 software. The value θJ−A for the WSON (NHN) package is specifically dependent on PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance and power dissipation for the WSON package, refer to Application Note AN-1187. Copyright © 1998–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM2672 |
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