Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
LM25116 Datasheet(PDF) 1 Page - Texas Instruments |
|
|
LM25116 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 36 page LM25116 www.ti.com SNVS509C – APRIL 2007 – REVISED AUGUST 2011 Wide Range Synchronous Buck Controller Check for Samples: LM25116 1 FEATURES 2 • Emulated peak current mode • Precision 1.5% voltage reference • Wide operating range up to 42V • Programmable current limit • Low IQ shutdown (< 10 µA) • Programmable soft-start • Drives standard or logic level MOSFETs • Programmable line under-voltage lockout • Robust 3.5A peak gate drive • Automatic switch to external bias supply • Free-run or synchronous operation to 1 MHz • TSSOP-20EP exposed pad • Optional diode emulation mode • Thermal shutdown • Programmable output from 1.215V to 36V DESCRIPTION The LM25116 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle by cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The operating frequency is programmable from 50 kHz to 1 MHz. The LM25116 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current. Additional features include a high voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle by cycle current limit and adjustable line under-voltage lockout. The device is available in a power enhanced TSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation. 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 © 2007–2011, 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. |
Número de pieza similar - LM25116 |
|
Descripción similar - LM25116 |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes 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 |