TPS544B20_16 Datasheet, PDF (1/74 Pages) Texas Instruments – Synchronous Buck Converters

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TPS544B20, TPS544C20
SLUSB69A – MAY 2014 – REVISED FEBRUARY 2016
TPS544x20 4.5-V to 18-V, 20-A, and 30-A SWIFT™
Synchronous Buck Converters with PMBus™
1 Features
•1 PMBus-Enabled Converters: 20 A, 30 A
• 4.5-V to 18-V input, 0.6-V to 5.5-V Output
• 5 mm × 7 mm LQFN Package with 0.5-mm Pitch
• Single Thermal Pad
• Integrated 4.5-mΩ and 2.0-mΩ Stacked
NexFET™ Power Stage
• 600-mV, 0.5% Reference
• Lossless, Low-Side MOSFET Current Sensing
• Selectable D-CAP™ and D-CAP2™ Mode Control
• Differential Remote Sensing
• Monotonic Start-Up into Pre-Biased Output
• Output Voltage Margin and Trim
• Output Voltage and Output Current Reporting
• External Temperature Monitoring with 2N3904
• Programmable via PMBus
– Overcurrent Protection
– UVLO, Soft-Start
– PGOOD, OV, UV, OT Levels
– Fault Responses
– Turn-On and Turn-Off Delays
• Thermal Shutdown
• Pin 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 TPS544B20 and TPS544C20 devices are
PMBus compatible, non-isolated DC-DC Integrated
FET converters, capable of high-frequency operation
and delivering 20-A , or 30-A current output from a
5 mm × 7 mm package, enabling high-power density
and fast transient performance with minimal PCB
area. The PMBus interface provides for converter
configuration as well as monitoring of key parameters
including output voltage, current and an optional
external temperature. High-frequency, low-loss
switching, provided by an integrated NexFET power
stage and optimized drivers, allows for very high-
density power solutions and reduced inductor and
filter capacitor sizes. Response to fault conditions can
be set to either restart or latch off depending on
system requirements.
PART NAME
TPS544B20
TPS544C20
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
LQFN (40)
5.00 mm × 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs Output Current
100
95
90
85
80
75
70
65
60
0
5
V_IN = 12 V
f_SW = 500 kHz
Output Voltage
0.6 V
1.0 V
1.8 V
3.3 V
0.8 V
1.2 V
2.5 V
10
15
20
Load Current (A)
L = 410 nH
R_DCR = 0.3 mŸ
25
30
C003
Snubber = Open
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.