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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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LP38859 Scheda tecnica(PDF) 1 Page - National Semiconductor (TI) |
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LP38859 Scheda tecnica(HTML) 1 Page - National Semiconductor (TI) |
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1 / 14 page  LP38859 3A Fast-Response High-Accuracy LDO Linear Regulator with Soft-Start General Description The LP38859 is a high current, fast response regulator which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: V BIAS provides voltage to drive the gate of the N-MOS power transistor, while V IN is the input voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra low V IN voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet mini- mum external capacitance is required to maintain loop sta- bility. The fast transient response of this device makes it suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The LP38859 is available in TO-220 and TO-263 5-Lead packages. Dropout Voltage: 240 mV (typical) at 3A load current. Low Ground Pin Current: 14 mA (typical) at 3A load cur- rent. Soft-Start: Programmable Soft-Start time. Precision Output Voltage: ±1.0% for T J = 25˚C and ±2.0% for 0˚C ≤ T J ≤ +125˚C, across all line and load conditions Features n Standard V OUT values of 0.8V and 1.2V n Stable with 10µF Ceramic capacitors n Dropout voltage of 240 mV (typical) at 3A load current n Precision Output Voltage across all line and load conditions: — ±1.0% V OUT for TJ = 25˚C — ±2.0% V OUT for 0˚C ≤ T J ≤ +125˚C — ±3.0% V OUT for -40˚C ≤ T J ≤ +125˚C n Over-Temperature and Over-Current protection n Available in 5 lead TO-220 and TO-263 packages n Custom V OUT values between 0.8V and 1.2V are available n −40˚C to +125˚C Operating Temperature Range Applications n ASIC Power Supplies In: - Desktops, Notebooks, and Graphics Cards, Servers - Gaming Set Top Boxes, Printers and Copiers n Server Core and I/O Supplies n DSP and FPGA Power Supplies n SMPS Post-Regulator Typical Application Circuit 20131201 June 2006 © 2006 National Semiconductor Corporation DS201312 www.national.com |
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