TPS54327 Switcher Datasheet

TPS54327 Datasheet, PDF, Equivalent


Part Number

TPS54327

Description

3-A Output Single Synchronous Step-Down Switcher

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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TPS54327
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TPS54327
SLVSAG1C – DECEMBER 2010 – REVISED DECEMBER 2015
TPS54327 3-A Output Single Synchronous Step-Down Switcher
With Integrated FET
1 Features
1 D-CAP2™ Mode Enables Fast Transient
Response
• Low-Output Ripple and Allows Ceramic Output
Capacitor
• Wide VIN Input Voltage Range: 4.5 V to 18 V
• Output Voltage Range: 0.76 V to 7 V
• Highly Efficient Integrated FETs Optimized
for Lower Duty Cycle Applications
– 100 m(High-Side) and 70 m(Low-Side)
• High Efficiency, Less Than 10 μA at shutdown
• High Initial Bandgap Reference Accuracy
• Adjustable Soft Start
• Prebiased Soft Start
• 700-kHz Switching Frequency (fSW)
• Cycle-By-Cycle Overcurrent Limit
2 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)
3 Description
The TPS54327 device is an adaptive on-time D-
CAP2™ mode synchronous buck converter.
TheTPS54327 enables system designers to complete
the suite of various end equipment’s power bus
regulators with a cost effective, low component count,
low standby current solution. The main control loop
for the TPS54327 uses the D-CAP2 mode control
which provides a fast transient response with no
external compensation components. The TPS54327
also has a proprietary circuit that enables the device
to adopt to both low equivalent series resistance
(ESR) output capacitors, such as POSCAP or SP-
CAP, and ultra-low ESR ceramic capacitors. The
device operates from 4.5-V to 18-V VIN input. The
output voltage can be programmed between 0.76 V
and 7 V. The device also features an adjustable soft
start time. The TPS54327 is available in the 8-pin
DDA package and 10-pin DRC, and is designed to
operate from –40°C to 85°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54327
HSOP (8)
VSON (10)
4.89 mm × 3.90 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
TPS54327 Transient Response
Vout (50 mV/div)
Iout (2 A/div)
100 ms/div
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS54327
TPS54327
SLVSAG1C – DECEMBER 2010 – REVISED DECEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 7
7.1 Overview ................................................................... 7
7.2 Functional Block Diagram ......................................... 7
7.3 Feature Description................................................... 7
7.4 Device Functional Modes.......................................... 9
8 Application and Implementation ........................ 10
8.1 Application Information............................................ 10
8.2 Typical Application ................................................. 10
9 Power Supply Recommendations...................... 14
10 Layout................................................................... 14
10.1 Layout Guidelines ................................................. 14
10.2 Layout Examples................................................... 15
10.3 Thermal Considerations ........................................ 17
11 Device and Documentation Support ................. 18
11.1 Documentation Support ........................................ 18
11.2 Community Resources.......................................... 18
11.3 Trademarks ........................................................... 18
11.4 Electrostatic Discharge Caution ............................ 18
11.5 Glossary ................................................................ 18
12 Mechanical, Packaging, and Orderable
Information ........................................................... 18
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (January 2012) to Revision C
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
• Removed Ordering Information table .................................................................................................................................... 1
Changes from Revision A (October 2011) to Revision B
Page
• Removed (SWIFT™) from the data sheet title ....................................................................................................................... 1
• Added "and 10-pin DRC" to the DESCRIPTION .................................................................................................................... 1
• Added the DRC-10 Pin package pin out ................................................................................................................................ 3
• Changed the VBST(vs SW) MAX value From: 6V to 6.5V in the Abs Max Ratings table ..................................................... 4
• Changed the VBST(vs SW) MAX value From: 5.7V to 6V in the ROC table......................................................................... 4
• Changed UVLO MIn Value From: 0.19 V To: 0.17 V ............................................................................................................. 5
• Added Added a conditions statement "VIN = 12 V, TA = 25°C" to the TYPICAL CHARACTERISTICS ............................... 6
• Changed Figure 10 title From: 1.05-V, 50-mA to 2-A LOAD TRANSIENT RESPONSE To: 1.05-V, 0-A to 3-A LOAD
TRANSIENT RESPONSE .................................................................................................................................................... 12
• Changed Figure 12 Figure Title From: (IO = 2 A) To: (IO = 3 A)........................................................................................... 12
• Changed Figure 13 Figure Title From: (IO = 2 A) To: (IO = 3 A)........................................................................................... 12
• Added Figure 17 ................................................................................................................................................................... 16
Changes from Original (November 2010) to Revision A
Page
• Changed Pin 6 (SW) Description In the Pin Functions table ................................................................................................ 3
• Changed the VENH Min value From: 2 V To: 1.6 V in the Logic Threshold section ................................................................ 5
• Changed Figure 4................................................................................................................................................................... 6
• Changed Equation 1............................................................................................................................................................... 8
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Product Folder Links: TPS54327
Copyright © 2010–2015, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design TPS54327 S LVSAG1C – DECEMBER 2010 – REVISED D ECEMBER 2015 TPS54327 3-A Output Single Synchronous Step-Down Switcher With In tegrated FET 1 Features •1 D-CAP2™ Mode Enables Fast Transient Response Low-Output Ripple and Allows Ceramic Output Capacitor • Wide VIN Input Vo ltage Range: 4.5 V to 18 V • Output V oltage Range: 0.76 V to 7 V • Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications – 100 mΩ (High-Side) and 70 mΩ (Low-Side) • High Efficiency, Less Than 10 μA at shutdown • High Initial Bandgap Re ference Accuracy • Adjustable Soft St art • Prebiased Soft Start • 700-kH z Switching Frequency (fSW) • Cycle-B y-Cycle Overcurrent Limit 2 Application s • Wide Range of Applications for Lo w Voltage System – Digital TV Power S upply – High Definition Blu-ray Disc Players – Networking Home Terminal – Digital Set Top Box (STB) 3 Description The TPS54327 device is an.
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