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TPS54227 Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza TPS54227
Descripción Electrónicos  4.5V to 18V Input, 2-A SYNCHRONOUS STEP DOWN SWIFT
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54227 Datasheet(HTML) 1 Page - Texas Instruments

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TPS54227DDA
100
s/div
m
Vout (50 mV/div)
Iout (1 A/div)
TPS54227
www.ti.com
SLVSAU2
– MAY 2011
4.5V to 18V Input, 2-A SYNCHRONOUS STEP DOWN (SWIFTTM )
CONVERTER
Check for Samples: TPS54227
1
FEATURES
DESCRIPTION
The TPS54227 is an adaptive on-time D-CAP2
23
D-CAP2
™ Mode Enables Fast Transient
mode synchronous buck converter. TheTPS54227
Response
enables system designers to complete the suite of
Low Output Ripple and Allows Ceramic Output
various end equipment
’s power bus regulators with a
Capacitor
cost effective, low component count, low standby
current solution. The main control loop for the
Wide VIN Input Voltage Range: 4.5 V to 18 V
TPS54227 uses the D-CAP2
™ mode control which
Output Voltage Range: 0.76 V to 7.0 V
provides a fast transient response with no external
Highly Efficient Integrated FETs Optimized
compensation components. The TPS54227 also has
for Lower Duty Cycle Applications
a proprietary circuit that enables the device to adopt
– 155 mΩ (High Side) and 108 mΩ (Low Side)
to both low equivalent series resistance (ESR) output
capacitors, such as POSCAP or SP-CAP, and
High Efficiency, Less Than 10
μA at Shutdown
ultra-low
ESR
ceramic
capacitors.
The
device
High Initial Bandgap Reference Accuracy
operates from 4.5-V to 18-V VIN input. The output
Adjustable Soft Start
voltage can be programmed between 0.76 V and 7 V.
The device also features an adjustable soft start time.
Pre-Biased Soft Start
The TPS54227 is available in the 8-pin DDA
700-kHz Switching Frequency (fSW)
package, and designed to operate from
–40°C to
Cycle By Cycle Over Current Limit
85
°C.
APPLICATIONS
Wide Range of Applications for Low Voltage
System
– Digital TV Power Supply
– High Definition Blu-ray Disc™ Players
– Networking Home Terminal
– Digital Set Top Box (STB)
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
D-CAP2 is a trademark of Texas Instruments.
3
Blu-ray Disc is a trademark of Blu-ray Disc Association.
PRODUCTION DATA information is current as of publication date.
Copyright
© 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.


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