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PDF SC1211VX Data sheet ( Hoja de datos )
| Número de pieza | SC1211VX | |
| Descripción | High Speed - Combi-Sense - Synchronous MOSFET Driver for Mobile Applications | |
| Fabricantes | Semtech | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SC1211VX (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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POWER MANAGEMENT
Description
SC1211VX
High Speed, Combi-Sense®, Synchronous
MOSFET Driver for Mowbwiwl.eDaAtapShpeelti4cUa.cotmions
Features
The SC1211VX is a high speed, Combi-Sense®, dual out-
put driver designed to drive high-side and low-side
MOSFETs in a synchronous Buck converter. These
drivers combined with Combi-Sense® PWM controllers,
such as Semtech SC2643VX or SC2643, provide a
cost effective multi-phase voltage regulator for advanced
microprocessors.
The Combi-Sense® is a technique to sense the inductor
current for peak current mode control of voltage regula-
tor without using sensing resistor. It provides the follow-
ing advantages:
- No costly precision sensing resistor
- Lossless current sensing
- High level noise free signal
- Fast response
- Suitable for wide range of duty cycle
- Only two small signal components (third optional)
The detailed explanation of the technique can be found
in the Applications Information section.
u High efficiency
u High peak drive current
u Adaptive non-overlapping gate drives provide
shoot-through protection
u Support Combi-Sense® and VID-on-fly operations
u Fast rise and fall times (15ns typical with 3000pf
load)
u Ultra-low (<30ns) propagation delay (BG going low)
u Floating top gate drive
u Crowbar function for over voltage protection
u High frequency (to 1.5 MHz) operation allows use
of small inductors and low cost ceramic capacitors
u Under-voltage-lockout
u Low quiescent current
u Power SOIC-8L package, fully RoHS and WEEE
compliant
A 30ns max propagation delay from input transition to
the gate of the power FET’s guarantees operation at high
switching frequencies. Internal overlap protection circuit
prevents shoot-through from Vin to PGND in the main
and synchronous MOSFETs. The adaptive overlap pro-
tection circuit ensures the bottom FET does not turn on
until the top FET source has reached 1V, to prevent cross-
conduction.
Applications
u Intel Pentium® processor power supplies
u AMD AthlonTM and AMD-K8TM processor power
supplies
u High efficiency portable and notebook computers
u Battery powered applications
u High current low voltage DC-DC converters
High current drive capability allows fast switching, thus
reducing switching losses at high (up to 1.5MHz) frequen-
cies without causing thermal stress on the driver.
Under-voltage-lockout and over-temperature shutdown
features are included for proper and safe operation.
Timed latches and improved robustness are built into
the housekeeping functions such as the Under Voltage
Lockout and adaptive Shoot-through protection circuitry
to prevent false triggering and to assure safe operation.
The SC1211VX is offered in a Power SOIC-8L package.
October 12, 2005
1 www.semtech.com
1 page  
POWER MANAGEMENT
Timing Diagrams
CO
DRN
TG
tPDH_TG tR_TG
BG 1.4V
tPDL_BG tF_BG
Rising Edge Transition
SC1211VX
www.DataSheet4U.com
1.0V
tPDL_TG tF_TG
tPDH_BG tR_BG
Falling Edge Transition
2005 Semtech Corp.
5
www.semtech.com
5 Page 
POWER MANAGEMENT
OOuuttlilnineeDDrarawwiningg- P- oPwowereSr OSIOCI-C8-L8
SC1211VX
www.DataSheet4U.com
Land Pattern - Power SOIC-8
Contact Information
2005 Semtech Corp.
Semtech Corporation
Power Management Products Division
200 Flynn Rd., Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
11
www.semtech.com
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SC1211VX.PDF ] | |
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