Electronic Components Datasheet Search |
|
LP3891ET-1.8 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
|
|
LP3891ET-1.8 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 12 page LP3891 0.8A Fast-Response Ultra Low Dropout Linear Regulators General Description The LP3891 is a high current, fast response regulator which can maintain output voltage regulation with minimum input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: Vbias provides voltage to drive the gate of the N-MOS power transistor, while Vin 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 Vin voltages. Unlike bipolar regula- tors, the CMOS architectutre consumes extremely low qui- escent 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 these devices makes them suitable for use in powering DSP, Microcontroller Core volt- ages and Switch Mode Power Supply post regulators. The parts are available in TO-220 and TO-263 packages. Dropout Voltage: 100 mV (typ) @ 0.8A load current. Ground Pin Current: 3 mA (typ) at full load. Shutdown Current: 60 nA (typ) when S/D pin is low. Precision Output Voltage: 1.5% room temperature accu- racy. Features n Ultra low dropout voltage (100mV @ 0.8A typ) n Low ground pin current n Load regulation of 0.04%/A n 60 nA typical quiescent current in shutdown n 1.5% output accuracy (25˚C) n TO-220, TO-263 packages n Over temperature/over current protection n −40˚C to +125˚C junction temperature range Applications n DSP Power Supplies n Server Core and I/O Supplies n PC Add-in-Cards n Local Regulators in Set-Top Boxes n Microcontroller Power Supplies n High Efficiency Power Supplies n SMPS Post-Regulators Typical Application Circuit 20069501 At least 10 µF of input and output capacitance is required for stability. *Tantalum capacitors are recommended. Aluminum electrolytic capacitors may be used for restricted temperature range. See application hints. Connection Diagrams 20069502 TO-220, Top View 20069503 TO-263, Top View September 2003 © 2003 National Semiconductor Corporation DS200695 www.national.com |
Similar Part No. - LP3891ET-1.8 |
|
Similar Description - LP3891ET-1.8 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |