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LM3475 Folha de dados(PDF) 1 Page - Texas Instruments

Nome de Peças LM3475
Descrição Electrónicos  Hysteretic PFET Buck Controller
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

LM3475 Folha de dados(HTML) 1 Page - Texas Instruments

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VOUT = 2.5V/2A
CIN
COUT
RFB1
RFB2
L1
D1
Q1
10 PF
100 PF
10 PH
1k
2.15k
Si2343
LM3475
VIN
EN
GND
PGATE
FB
1
2
3
4
5
CFF
1 nF
VIN = 5V
LM3475
www.ti.com
SNVS239A – OCTOBER 2004 – REVISED JANUARY 2005
LM3475 Hysteretic PFET Buck Controller
Check for Samples: LM3475
1
FEATURES
DESCRIPTION
2
Easy to Use Control Methodology
The LM3475 is a hysteretic P-FET buck controller
0.8V to VIN Adjustable Output Range
designed to support a wide range of high efficiency
High Efficiency (90% Typical)
applications in a very small SOT-23-5 package. The
hysteretic control scheme has several advantages,
±0.9% (±1.5% Over Temp) Feedback Voltage
including simple system design with no external
100% Duty Cycle Capable
compensation, stable operation with a wide range of
Maximum Operating Frequency up to 2MHz
components, and extremely fast transient response.
Hysteretic
control
also
provides
high
efficiency
Internal Soft-Start
operation, even at light loads. The PFET architecture
Enable Pin
allows for low component count as well as 100% duty
SOT-23-5 Package
cycle and ultra-low dropout operation.
APPLICATIONS
TFT Monitor
Auto PC
Vehicle Security
Navigation Systems
Notebook Standby Supply
Battery Powered Portable Applications
Distributed Power Systems
Typical Application Circuit
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 © 2004–2005, 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.


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