TPS549A20 Datasheet, PDF (1/47 Pages) Texas Instruments – 15A Synchronous Step-Down SWIFT Converter With PMBus

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS549A20
SLUSC79A – NOVEMBER 2015 – REVISED DECEMBER 2015
TPS549A20 1.5-V to 20-V (4.5-V to 25-V Bias) Input,
15-A Synchronous Step-Down SWIFT™ Converter With PMBus™
1 Features
•1 Integrated SWIFT™ 9.9-mΩ and 4.3-mΩ
MOSFETs Support 15-A Continuous I_OUT
• Wide Conversion Input Voltage Range: 1.5 V to
20 V (with Snubber)
• Output Voltage Range from 0.6 V to 5.5 V
• Available PMBus™ Adjustments
– Voltage Margin and Adjustment
– Soft-Start Time
– Power-On Delay
– VDD UVLO Level
– Fault Reporting
– Switching Frequency
• Supports All Ceramic Output Capacitors
• Reference Voltage: 600 mV with ±0.5% Tolerance
from –40°C to 85°C ambient temperature
• D-CAP3™ Control Mode With Fast Load-Step
Response
• Hiccup Over Current Protection
• Auto-Skipping Eco-Mode™ for High Light-Load
Efficiency
• FCCM for Tight Output Ripple and Voltage
Tolerance Requirements
• Pre-charged Startup Capability
• Eight Selectable Frequency Settings from
200 kHz to 1 MHz via PMBus
• 4.5 mm x 3.5 mm, 28-Pin, VQFN-CLIP Package
• Supported at the WEBENCH™ Design Center
SWIFT™
2 Applications
• Server, Cloud-Computing, Storage
• Telecom & Networking, Point-of-Load (POL)
• IPCs, Factory Automation, PLC, Test
Measurement
• Performance DSPs, FPGAs
3 Description
The TPS549A20 is a small-sized, synchronous buck
converter with an adaptive on-time D-CAP3 control
mode. The device offers ease-of-use and low bill-of-
material count for space-conscious power systems.
This device features high-performance integrated
MOSFETs, accurate 0.6-V reference, and an
integrated boost switch. Competitive features include
very-low external-component count, fast load-
transient response, auto-skip mode operation,
internal soft-start control, and no requirement for
compensation. The device also features fault report
via PMBus™ to simplify the power supply design
A forced continuous conduction mode helps meet
tight voltage regulation accuracy requirements for
performance DSPs and FPGAs. The TPS549A20 is
available in a 28-pin VQFN-CLIP package and is
specified from –40°C to 125°C ambient temperature.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS549A20
VQFN-CLIP (28)
4.50 mm x 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Application
PGOOD
VIN
Thermal
Pad
23
22 21 20
18 19 17 16 15
24 VO
25 TRIP
26 ALERT
27 SDA
28 SCL
TPS549A20
PGND 14
PGND 13
PGND 12
PGND 11
PGND 10
1
234
56789
Thermal
Pad
EN
VREG
VOUT
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.