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TL720M05QPWPRQ1 데이터시트(PDF) 9 Page - Texas Instruments |
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TL720M05QPWPRQ1 데이터시트(HTML) 9 Page - Texas Instruments |
9 / 25 page IN OUT Saturation Control and Protection Circuit T Sensor emperature Bandgap Reference GND TL720M05-Q1 www.ti.com SGLS380H – SEPTEMBER 2008 – REVISED JULY 2015 8 Detailed Description 8.1 Overview The TL720M05-Q1 device is a monolithic integrated low-dropout voltage regulator offered in a 3-pin TO package. The device regulates an input voltage up to 45 V to VOUT = 5 V (typical) with 2% tolerance. The device can drive loads up to 450 mA and is short-circuit proof. At overtemperature, the incorporated temperature protection turns off the device. 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Regulated Output (OUT) The OUT terminal is the regulated 5-V output. The control amplifier compares a reference voltage to a voltage that is proportional to the output voltage and drives the base of the series transistor through a buffer. Saturation control as a function of the load current prevents any oversaturation of the power element. The output has current limitation. In the event that the regulator drops out of regulation, the output tracks the input minus a drop based on the load current. 8.4 Device Functional Modes 8.4.1 Low-Voltage Tracking At low input voltages, the regulator drops out of regulation and the output voltage tracks input minus a voltage based on the load current and switch resistance. This allows for a smaller input capacitor and can possibly eliminate the need of using a boost convertor during cold-crank conditions. Copyright © 2008–2015, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: TL720M05-Q1 |
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