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TPS54315-EP Datasheet Preview

TPS54315-EP Datasheet

Synchronous-Buck PWM Switcher

No Preview Available !

www.ti.com
Typical Size
(6,3 mm x 6,4 mm)
TPS54311-EP, TPS54312-EP,
TPS54313-EP, TPS54314-EP,
TPS54315-EP, TPS54316-EP
SGLS376A – FEBRUARY 2007 – REVISED MARCH 2007
3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM
SWITCHER WITH INTEGRATED FETs (SWIFT™)
FEATURES
Controlled Baseline
– One Assembly/Test Site, One Fabrication
Site
Extended Temperature Performance of –55°C
to 125°C
Enhanced Diminishing Manufacturing Sources
(DMS) Support
Enhanced Product-Change Notification
Qualification Pedigree (1)
60-mMOSFET Switches for High Efficiency
at 3-A Continuous Output Source or Sink
Current
0.9 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V and 3.3 V Fixed
Output Voltage Device With 1% 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
(1) Component qualification in accordance with JEDEC and
industry standards to ensure reliable operation over an
extended temperature range. This includes, but is not limited
to, Highly Accelerated Stress Test (HAST) or biased 85/85,
temperature cycle, autoclave or unbiased HAST,
electromigration, bond intermetallic life, and mold compound
life. Such qualification testing should not be viewed as
justifying use of this component beyond specified
performance and environmental limits.
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
Automotive Telematics
PWP PACKAGE
(TOP VIEW)
AGND
1
VSENSE
2
NC
3
PWRGD
4
BOOT
5
PH
6
PH
7
PH
8
PH
9
PH
10
20
RT
19
FSEL
18
SS/ENA
17
VBIAS
16
VIN
15
VIN
14
VIN
13
PGND
12
PGND
11
PGND
NC − No internal connection
DESCRIPTION/ORDERING INFORMATION
As A member of the SWIFT family of dc/dc regulators, the TPS54311, TPS54312, TPS54313, TPS54314,
TPS54315 and TPS54316 low-input-voltage high-output current synchronous-buck PWM converter integrates 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 power good output useful for processor/logic reset, fault signaling, and supply
sequencing.
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.
SWIFT, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated




etcTI

TPS54315-EP Datasheet Preview

TPS54315-EP Datasheet

Synchronous-Buck PWM Switcher

No Preview Available !

TPS54311-EP, TPS54312-EP,
TPS54313-EP, TPS54314-EP,
TPS54315-EP, TPS54316-EP
SGLS376A – FEBRUARY 2007 – REVISED MARCH 2007
www.ti.com
The TPS54311, TPS54312, TPS54313, TPS54314, TPS54315 and TPS54316 devices are available in a
thermally enhanced 20-pin TSSOP (PWP) PowerPAD™ package, which eliminates bulky heatsinks. Texas
Instruments 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.
ORDERING INFORMATION(1)
TJ
–55°C to 125°C
OUTPUT VOLTAGE
0.9 V
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
PACKAGED DEVICES PLASTIC HTSSOP
(PWP) (2)
TPS54311MPWPREP
TPS54312MPWPREP
TPS54313MPWPREP
TPS54314MPWPREP
TPS54315MPWPREP
TPS54316MPWPREP
TOP SIDE MARKING
TPS54311
TPS54312
TPS54313
TPS54314
TPS54315
TPS54316
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
Web site at www.ti.com.
(2) The PWP package is taped and reeled as indicated by the R suffix. See application section of data sheet for PowerPAD drawing and
layout information
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
TERMINAL
NAME
NO.
AGND
1
BOOT
FSEL
NC
PGND
PH
PWRGD
RT
SS/ENA
5
19
3
11–13
6–10
4
20
18
VBIAS
17
VIN
VSENSE
14–16
2
TERMINAL 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.
Power good 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-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.
2
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Part Number TPS54315-EP
Description Synchronous-Buck PWM Switcher
Maker etcTI
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