TPS544C25 Datasheet, PDF (1/100 Pages) Texas Instruments – 4.5-V to 18-V, 20-A and 30-A SWIFT Synchronous Buck Converters with PMBus and Frequency Synchronization

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TPS544C25, TPS544B25
SLUSC81 – MAY 2015
TPS544x25 4.5-V to 18-V, 20-A and 30-A SWIFT™
Synchronous Buck Converters with PMBus™ and Frequency Synchronization
1 Features
•1 PMBus 1.2 Compliant Converters: 20 A and 30 A
• Input Voltage Range: 4.5 V to 18 V
• Output Voltage Range: 0.5 V to 5.5 V
• 5 mm × 7 mm LQFN Package
• Single Thermal Pad
• Integrated 5.5-mΩ and 2.0-mΩ Stacked
NexFET™ Power Stage
• 500-mV to 1500-mV Reference for Adapative
Voltage Scaling (AVS) and Margining through
PMBus
• 0.5% Reference Accuracy at 600 mV and Above
• Lossless Low-Side MOSFET Current Sensing
• Voltage Mode Control with Input Feed-Forward
• Differential Remote Sensing
• Monotonic Start-Up into Pre-Biased Output
• Output Voltage and Output Current Reporting
• External Temperature Monitoring with 2N3904
Transistor
• Programmable via the PMBus interface
– VOUT_COMMAND and AVS VOUT Transition
Rate
– Overcurrent Protection with Thermal
Compensation
– UVLO, Soft-Start and Soft-Stop
– PGOOD, OV, UV, OT Levels
– Fault Responses
– Turn-On and Turn-Off Delays
• Thermal Shutdown
• Pin Strapping for Switching Frequency: 200 kHz to
1 MHz
• Frequency Synchronization to an External Clock
• Footprint Compatible 20-A, 30-A Converters
2 Applications
• Test and Instrumentation
• Ethernet Switches, Optical Switches, Routers,
Base Stations
• Servers
• Enterprise Storage SSD
• High-Density Power Solutions
3 Description
The TPS544x25 devices are PMBus 1.2 Compliant,
non-isolated DC-DC converters with integrated FETs,
capable of high-frequency operation and 20-A or 30-A
current output from a 5 mm × 7 mm package. High-
frequency, low-loss switching, provided by an
integrated NexFET™ power stage and optimized
drivers, allows for very high-density power solutions.
The PMBus interface enables the AVS through
VOUT_COMMAND, flexible converter configuration,
as well as key parameters monitoring including output
voltage, current and an optional external temperature.
Response to fault conditions can be set to either
restart, latch-off or ignore depending on system
requirements.
Device Information
DEVICE NAME
PACKAGE
BODY SIZE
TPS544B25RVFT
LQFN (40)
5.00 mm × 7.00 mm
TPS544C25RVFT
LQFN (40)
5.00 mm × 7.00 mm
.
.
Efficiency
100
95
90
85
80
75
70
65
60
0
4
8
V_IN = 12 V
f_SW = 500 kHz
12 16 20
Load Current (A)
No Snubber
R_DCR = 0.3mŸ
V_OUT = 0.5
V_OUT = 1.0
V_OUT = 1.5
V_OUT = 2.5
V_OUT = 3.3
24 28 32
L = 470 nH
R_BOOT = 0 Ÿ
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.