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LP38843SX-1.5 Datasheet(PDF) 1 Page - Texas Instruments |
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LP38843SX-1.5 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 17 page OUT S/D 0.1 PF 10 PF Ceramic OUT S/D GND IN BIAS LP38843 IN BIAS 5V ± 10% GND GND 4.7 PF * LP38843 www.ti.com SNVS290C – DECEMBER 2004 – REVISED APRIL 2013 LP38843 3A Ultra Low Dropout Linear Regulators Stable with Ceramic Output Capacitors Check for Samples: LP38843 1 FEATURES DESCRIPTION The LP38843 is a high-current, fast-response 2 • Ideal for Conversion From 1.8V or 1.5V Inputs regulator which can maintain output voltage • Designed for use with low ESR Ceramic regulation with minimum input to output voltage drop. Capacitors Fabricated on a CMOS process, the device operates • 0.8V, 1.2V and 1.5V Standard Voltages from two input voltages: Vbias provides voltage to drive the gate of the N-MOS power transistor, while Available Vin is the input voltage which supplies power to the • Ultra Low Dropout Voltage (210mV at 3A typ) load. The use of an external bias rail allows the part • 1.5% Initial Output Accuracy to operate from ultra low Vin voltages. Unlike bipolar • Load Regulation of 0.1%/A (Typical) regulators, the CMOS architecture consumes extremely low quiescent current at any output load • 30nA Quiescent Current in Shutdown (Typical) current. The use of an N-MOS power transistor • Low Ground Pin Current at all Loads results in wide bandwidth, yet minimum external • Over Temperature/Over Current Protection capacitance is required to maintain loop stability. • Available in 5 Lead TO-220 and DDPAK/TO-263 The fast transient response of these devices makes Packages them suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode • −40°C to +125°C Junction Temperature Range Power Supply post regulators. The parts are available in TO-220 and DDPAK/TO-263 packages. APPLICATIONS Dropout Voltage: 210 mV (typ) at 3A load current. • ASIC Power Supplies In: – Desktops, Notebooks, and Graphics Cards, Quiescent Current: 30 mA (typ) at full load. Servers Shutdown Current: 30 nA (typ) when S/D pin is low. – Gaming Set Top Boxes, Printers and Precision Output Voltage: 1.5% room temperature Copiers accuracy. • Server Core and I/O Supplies • DSP and FPGA Power Supplies • SMPS Post-Regulator TYPICAL APPLICATION CIRCUIT * Minimum value required if Tantalum capacitor is used (see Application Hints). 1 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. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2004–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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