PWM Switcher. TPS54313 Datasheet

TPS54313 Switcher. Datasheet pdf. Equivalent

TPS54313 Datasheet
Recommendation TPS54313 Datasheet
Part TPS54313
Description Synchronous-Buck PWM Switcher
Feature TPS54313; Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS54311, .
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Texas Instruments TPS54313
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS54311, TPS54312, TPS54313
TPS54314, TPS54315, TPS54316
SLVS416C – FEBRUARY 2002 – REVISED JANUARY 2015
TPS5431x 3-V to 6-V Input, 3-A Output Synchronous Buck PWM Switcher With Integrated
FETs (SWIFT™)
1 Features
1 60-mΩ, MOSFET Switches for High Efficiency at
3-A Continuous Output Source and Sink Current
• 0.9-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V Fixed
Output Voltage Devices With 1.0% Initial Accuracy
• Internally Compensated for Low Parts Count
• Fast Transient Response
• Wide PWM Frequency Fixed 350 kHz, 550 kHz
or Adjustable 280 kHz to 700 kHz
• Load Protected by Peak Current Limit and
Thermal Shutdown
• Integrated Solution Reduces Board Area and
Total Cost
2 Applications
• Low-Voltage, High-Density Systems With Power
Distributed at 5 V or 3.3 V
• Point of Load Regulation for High Performance
DSPs, FPGAs, ASICs and Microprocessors
• Broadband, Networking and Optical
Communications Infrastructure
• Portable Computing/Notebook PCs
Input
Simplified Schematic
VIN
PH
TPS54316
BOOT
PGND
VBIAS
VSENSE
GND
Output
3 Description
As members of the SWIFT™ family of DC - DC
regulators, the TPS54311, TPS54312, TPS54313,
TPS54314, TPS54315 and TPS54316 low-input-
voltage high-outputcurrent synchronous-buck PWM
converters integrate all required active components.
Included on the substrate with the listed features are
a true, high performance, voltage error amplifier that
provides high performance under transient conditions;
an undervoltage-lockout circuit to prevent start-up
until the input voltage reaches 3 V; an internally and
externally set slow-start circuit to limit in-rush
currents; and a powergood output useful for
processor/logic reset, fault signaling, and supply
sequencing.
The TPS54311, TPS54312, TPS54313, TPS54314,
TPS54315 and TPS54316 devices are available in a
thermally enhanced 20-pin HTSSOP (PWP)
PowerPAD™ package, which eliminates bulky
heatsinks. TI provides evaluation modules and the
SWIFT designer software tool to aid in quickly
achieving high-performance power supply designs to
meet aggressive equipment development cycles.
Device Information(1)
PART NUMBER
PACKAGE OUTPUT VOLTAGE
TPS54311
0.9 V
TPS54312
1.2 V
TPS54313
TPS54314
HTSSOP (20)
1.5 V
1.8 V
TPS54315
2.5 V
TPS54316
3.3 V
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs Load Current
96
94
92
90
88
86
84
TA = 25°C
82 VI = 5 V
VO = 3.3 V
80
0 0.5 1 1.5 2 2.5 3
Load Current − A
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.



Texas Instruments TPS54313
TPS54311, TPS54312, TPS54313
TPS54314, TPS54315, TPS54316
SLVS416C – FEBRUARY 2002 – REVISED JANUARY 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 Recommended Operating Conditions....................... 4
6.3 Thermal Information .................................................. 4
6.4 Dissipation Ratings ................................................... 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................... 9
7.4 Device Functional Modes........................................ 12
8 Application and Implementation ........................ 13
8.1 Application Information............................................ 13
8.2 Typical Application ................................................. 13
9 Power Supply Recommendations...................... 16
10 Layout................................................................... 16
10.1 Layout Guidelines ................................................. 16
10.2 Layout Example .................................................... 17
10.3 Thermal Considerations ........................................ 17
11 Device and Documentation Support ................. 18
11.1 Documentation Support ........................................ 18
11.2 Related Links ........................................................ 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
Changes from Revision B (April 2005) to Revision C
Page
• Added 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
2
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Copyright © 2002–2015, Texas Instruments Incorporated
Product Folder Links: TPS54311 TPS54312 TPS54313 TPS54314 TPS54315 TPS54316



Texas Instruments TPS54313
www.ti.com
5 Pin Configuration and Functions
TPS54311, TPS54312, TPS54313
TPS54314, TPS54315, TPS54316
SLVS416C – FEBRUARY 2002 – REVISED JANUARY 2015
AGND
VSENSE
NC
PWRGD
BOOT
PH
PH
PH
PH
PH
PWP Package
20-Pin HTSSOP
Top View
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
RT
FSEL
SS/ENA
VBIAS
VIN
VIN
VIN
PGND
PGND
PGND
NC – No internal connection
PIN
NAME
NO.
AGND
1
BOOT
FSEL
NC
PGND
5
19
3
1113
PH
PWRGD
610
4
RT
20
SS/ENA
18
VBIAS
17
VIN
1416
VSENSE
2
Pin Functions
DESCRIPTION
Analog ground. Return for compensation network/output divider, slow-start capacitor, VBIAS capacitor, RT resistor and FSEL pin. Make
PowerPAD connection to AGND.
Bootstrap input. 0.022-µF to 0.1-µF low-ESR capacitor connected from BOOT to PH generates floating drive for the high-side FET driver.
Frequency select input. Provides logic input to select between two internally set switching frequencies.
No connection
Power ground. High current return for the low-side driver and power MOSFET. Connect PGND with large copper areas to the input and
output supply returns, and negative terminals of the input and output capacitors.
Phase input/output. Junction of the internal high and low-side power MOSFETs, and output inductor.
Powergood open-drain output. Hi-Z when VSENSE 90% Vref, otherwise PWRGD is low. Note that output is low when SS/ENA is low or
internal shutdown signal active.
Frequency setting resistor input. Connect a resistor from RT to AGND to set the switching frequency, fs.
Slow-start/enable input/output. Dual function pin which provides logic input to enable/disable device operation and capacitor input to
externally set the start-up time.
Internal bias regulator output. Supplies regulated voltage to internal circuitry. Bypass VBIAS pin to AGND pin with a high quality, low
ESR 0.1-µF to 1.0-µF ceramic capacitor.
Input supply for the power MOSFET switches and internal bias regulator. Bypass VIN pins to PGND pins close to device package with a
high quality, low ESR 1-µF to 10-µF ceramic capacitor.
Error amplifier inverting input. Connect directly to output voltage sense point.
Copyright © 2002–2015, Texas Instruments Incorporated
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3
Product Folder Links: TPS54311 TPS54312 TPS54313 TPS54314 TPS54315 TPS54316







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