LP38859 Datasheet | National Semiconductor

Description Features n Standard VOUT values of 0.8V and 1.2V The LP38859 is a high current, fast response regulator n Stable with 10µF Ceramic capacitors which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS n Dropout voltage of 240 m V (typical) at 3A load current process, the device operates from two input voltages: VBIAS n Precision Output Voltage across all line and load provides voltage to drive the gate of the N-MOS power conditions: transistor, while VIN is the input voltage which supplies - ± 1.0% VOUT for TJ = 25˚C power to the load. The use of an external bias rail allows the - ± 2.0% VOUT for 0˚C ≤ TJ ≤ +125˚C part to operate from ultra low VIN voltages. Unlike bipolar - ± 3.0% VOUT for -40˚C ≤ TJ ≤ +125˚C regulators, the CMOS architecture consumes extremely low n Over-Temperature and Over-Current protection quiescent current at any output load current. The use of an n Available in 5 lead TO-220 and TO-263 packages N-MOS power transistor results in wide bandwidth, yet minin Custom VOUT values between 0.8V and 1.2V are mum external capacitance is required to maintain loop staavailable bility. n - 40˚C to +125˚C Operating Temperature Range The fast transient response of this device makes it suitable for use in powering DSP, Microcontroller Core voltages and Applications Switch Mode Power Supply post regulators. The LP38859 is n ASIC Power Supplies In: available in TO-220 and TO-263 5-Lead packages. - Desktops, Notebooks, and Graphics Cards, Servers Dropout Voltage: 240 m V (typical) at 3A load current. - Gaming Set Top Boxes, Printers and Copiers Low Ground Pin Current: 14 m A (typical) at 3A load curn Server Core and I/O Supplies rent. n DSP and FPGA Power Supplies Soft-Start: Programmable Soft-Start time. . n SMPS Post-Regulator Precision Output Voltage: ± 1.0% for TJ = 25˚C and ± 2.0% for 0˚C ≤ TJ ≤ +125˚C, across all line and load conditions Data Shee Typical Application Circuit . ©...