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UC385TDKTTT-ADJ Datasheet(PDF) 1 Page - Texas Instruments |
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UC385TDKTTT-ADJ Datasheet(HTML) 1 Page - Texas Instruments |
1 / 18 page UC2851, UC2852, UC2853, UC285ADJ, UC3851, UC3852, UC3853, UC385ADJ FAST TRANSIENT RESPONSE 5A LOW DROPOUT REGULATOR SLUS212F − NOVEMBER 1999 − REVISED MAY 2009 1 www.ti.com D Fast Transient Response D 10-mA to 5-A Load Current D Short Circuit Protection D Maximum Dropout of 500-mV at 5-A Load Current D Separate Bias (VB) and VIN Pins D Available in Adjustable or Fixed Output Voltages D 5-Pin Package Allows Kelvin Sensing of Load Voltage D Reverse Current Protection description The UC385 is a low dropout linear regulator providing a quick response to fast load changes. Combined with its precision onboard reference, the UC385 excels at driving GTL and BTL buses. Due to its fast response to load transients, the total capacitance required to decouple the regulator’s output can be significantly decreased when compared to standard LDO linear regulators. Dropout voltage (VIN to VOUT) is only 490 mV maximum and 350 mV typical at 5-A load (0 °C to 100°C). The onboard bandgap reference is stable with temperature and scaled for a 1.2 V input to the internal power amplifier. The UC385 is available in fixed output voltages of 1.5 V, 2.1 V, or 2.5 V. The output voltage of the adjustable version can be set with two external resistors. If the external resistors are omitted, the output voltage defaults to 1.2 V. block diagram + THERMAL SHUTDOWN 1.2 V BANDGAP REFERENCE R2 R1 3 5 SHORT CIRCUIT SENSE 2 1 4 UC382−ADJ UC382−1 (1.5 V) UC382−2 (2.1 V) UC382−3 (2.5 V) OPEN 0 2 k 500 Ω 2 k 1.5 k Ω 2 k 2.16 k Ω R1 R2 ADJ GND VOUT VIN VB UDG-00084 Ω Ω Ω Copyright 1998−2009, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 5-PIN TO-263 TD PACKAGE (TOP VIEW) 5-PIN TO-220 T PACKAGE (TOP VIEW) Note: Tab = Ground All trademarks are the property of their respective owners. |
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