TPS546C23 Datasheet, PDF (1/97 Pages) Texas Instruments – 4.5-V to 18-V, 35-A Stackable Synchronous Buck Converters With PMBus

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TPS546C23
SLUSCC7A – JULY 2016 – REVISED AUGUST 2016
TPS546C23 4.5-V to 18-V, 35-A Stackable Synchronous Buck Converters With PMBus
1 Features
•1 PMBus™ 1.3 Compliant Converters: 35 A
• 2-Device Stackable for up to 70 A With Current
Sharing
• Input Voltage Range: 4.5 V to 18 V
• Output Voltage Range: 0.35 V to 5.5 V
• 5 mm × 7 mm LQFN Package
• Single Thermal Pad
• Integrated 3.2-mΩ and 1.4-mΩ Stacked
NexFET™ Power Stage
• 350-mV to 1650-mV Reference for Adaptive
Voltage Scaling (AVS) Function 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
• Internal Die Temperature Monitoring
• 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
or Output Clock to Sync Out
2 Applications
• Test and Instrumentation
• Ethernet Switches, Optical Switches, Routers,
Base Stations
• Servers
• Enterprise Storage SSD
• High-Density Power Solutions
3 Description
The TPS546C23 devices are PMBus 1.3 Compliant,
non-isolated DC-DC converters with integrated FETs,
capable of high-frequency operation and 35-A current
output from a 5-mm × 7-mm package. Two
TPS546C23 devices can be paralleled together to
provide up to 70-A load. Current sensing is realized
by sampling a small portion of the power stage
current and independent on the device temperature.
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 functions
through VOUT_COMMAND, flexible converter
configuration, as well as key parameters monitoring
including output voltage, current, and internal die
temperature. Response to fault conditions can be set
to either restart, latch-off or ignore depending on
system requirements.
Device Information(1)
DEVICE NAME
PACKAGE
BODY SIZE
TPS546C23
LQFN (40)
5.00 mm × 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
.
Simplified Application
BP3
DIFFO
FB
COMP
RT
VSEL
SS
BP3
AGND
TPS546C23
RSP
RSN
BOOT
SW
BP6
PGND
DRGND
VIN
VOUT
+
LOAD
±
Copyright © 2016, Texas Instruments Incorporated
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.