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LP38859 Datasheet(PDF) 1 Page - Texas Instruments |
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LP38859 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 21 page  SS IN BIAS GND OUT VOUT VIN VBIAS CIN 10 PF Ceramic COUT 10 PF Ceramic CBIAS 1 PF GND GND LP38859-x.x CSS LP38859 www.ti.com SNVS337D – JUNE 2006 – REVISED OCTOBER 2011 3A Fast-Response High-Accuracy LDO Linear Regulator with Soft-Start Check for Samples: LP38859 1 FEATURES DESCRIPTION The LP38859 is a high current, fast response 2 • Standard VOUT Values of 0.8V and 1.2V regulator which can maintain output voltage • Wide VBIAS Supply Operating Range of 3.0V to regulation with extremely low input to output voltage 5.5V drop. Fabricated on a CMOS process, the device • Stable with 10µF Ceramic Capacitors operates from two input voltages: VBIAS provides voltage to drive the gate of the N-MOS power • Dropout Voltage of 240 mV (typical) at 3A Load transistor, while VIN is the input voltage which Current supplies power to the load. The use of an external • Precision Output Voltage Across All Line and bias rail allows the part to operate from ultra low VIN Load Conditions: voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent – ±1.0% VOUT for TJ = 25°C current at any output load current. The use of an N- – ±2.0% VOUT for 0°C ≤ TJ ≤ +125°C MOS power transistor results in wide bandwidth, yet – ±3.0% VOUT for -40°C ≤ TJ ≤ +125°C minimum external capacitance is required to maintain • Over-Temperature and Over-Current loop stability. Protection The fast transient response of this device makes it • Available in 5-Lead TO-220 and DDPAK/TO-263 suitable for use in powering DSP, Microcontroller Packages Core voltages and Switch Mode Power Supply post regulators. The LP38859 is available in TO-220 and • Custom VOUT Values Between 0.8V and 1.2V DDPAK/TO-263 5-Lead packages. are Available Dropout Voltage: 240 mV (typical) at 3A load • −40°C to +125°C Operating Temperature Range current. APPLICATIONS Low Ground Pin Current: 10 mA (typical) at 3A load current. • ASIC Power Supplies In: – Desktops, Notebooks, and Graphics Cards, Soft-Start: Programmable Soft-Start time. Servers Precision Output Voltage: ±1.0% for TJ = 25°C and – Gaming Set Top Boxes, Printers and ±2.0% for 0°C ≤ TJ ≤ +125°C, across all line and load Copiers conditions • Server Core and I/O Supplies • DSP and FPGA Power Supplies • SMPS Post-Regulator Typical Application Circuit 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 © 2006–2011, 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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