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TPS40040 датащи(PDF) 1 Page - Texas Instruments

номер детали TPS40040
подробное описание детали  LOW PIN COUNT, LOW VIN (2.5 V TO 5.5 V) SYNCHRONOUS BUCK DC-TO-DC CONTROLLER WITH ENABLE
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

TPS40040 датащи(HTML) 1 Page - Texas Instruments

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1
FEATURES
APPLICATIONS
CONTENTS
DESCRIPTION
SIMPLIFIED APPLICATION DIAGRAM
1
2
3
4
8
7
6
5
FB
COMP
VDD
TPS40040/1
GND
VOUT
VIN
EN
HDRV
SW
BOOT
LDRV
TPS40040, TPS40041
SLUS700D – MARCH 2006 – REVISED DECEMBER 2007
www.ti.com
LOW PIN COUNT, LOW VIN (2.5 V TO 5.5 V) SYNCHRONOUS BUCK DC-TO-DC
CONTROLLER WITH ENABLE
• Point of Load
23
• 2.25-V to 5.5-V Input
• Telecommunications
• Output Voltage from 0.6 V to 90% of VIN
• DC to DC Modules
• High-Side Drive for N-Channel FET
• Set Top Boxes
• Supports Pre-Biased Outputs
• Adaptive Anti-Cross Conduction Gate Drive
• 1%, 0.6-V Reference
• Two Fixed Switching Frequency Versions,
Device Ratings
2
TPS40040 (300 kHz) and TPS40041 (600 kHz)
Electrical Characteristics
3
• Three Selectable Short Circuit Protection
Device Information
8
Levels of 105 mV, 180 mV and 310 mV
Application Information
10
• Hiccup Restart from Faults
Design Examples
19
• Voltage Mode Control
• Active Low Enable
Additional References
32
• Thermal Shutdown Protection at 145C
• 8-Pin, 3-mm x 3-mm SON with Ground
Connection to Thermal Pad
The TPS40040 and TPS40041 dc-to-dc controllers
are designed to operate from a 2.25-V to 5.5-V input
source.
To
reduce
the
number
of
external
components, several operating parameters are fixed
internally; namely, frequency, soft start time, and
short circuit protection (SCP) levels. For example, the
operating
frequencies
of
TPS40040/1
are
300
kHz/600 kHz, respectively.
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
PowerPAD is a trademark of Texas Instruments.
3
Predictive Gate Drive is a registered trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006–2007, 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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