Texas Instruments TPS4005 Series Manual

TPS4005x Wide-Input Synchronous Buck Controller

1 Features

• New products available
– LM5145 75-V synchronous buck controller with
wide input voltage and duty cycle ranges
– LM5146 100-V synchronous buck DC/DC
controller with wide duty-cycle range
• Operating input voltage 8 V to 40 V
• Input voltage feedforward compensation
• < 1% internal 0.7-V reference
• Programmable fixed-frequency up to 1-MHz
voltage mode controller
• Internal gate-drive outputs for high-side and
synchronous N-channel MOSFETs
• 16-pin PowerPAD ™ package (R
• Thermal shutdown
• Externally synchronizable
• Programmable high-side sense short-circuit
protection
• Programmable closed-loop soft start
• TPS40054 source only
• TPS40055 source and sink
• TPS40057 source and sink with V

2 Applications

• Power modules
• Networking and telecom
• Industrial and servers
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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.

3 Description

The TPS4005x is a family of high-voltage, wide-
input (8 V to 40 V), synchronous, step-down
controllers. The TPS4005x family offers design
flexibility
functions, including soft start, UVLO, operating
frequency, voltage feedforward, high-side current limit,
and loop compensation.
The TPS4005x uses voltage feedforward control
techniques to provide good line regulation over the
wide (4:1) input voltage range, and fast response
to input line transients. Near-constant modulator
gain with input variation eases loop compensation.
= 2°C/W)
θJC The externally programmable current limit provides
pulse-by-pulse current limit, as well as hiccup mode
operation using an internal fault counter for longer
duration overloads.
The new products, LM5145 and LM5146, offer
reduced BOM cost, higher efficiency, and reduced
solution size among many other features. Start a
WEBENCH
prebias
O
(1)
TPS4005xPWP
1 16
KFF ILIM
2 15
VIN
RT
3 BOOST 14
BP5
4 SYNC HDRV 13
5 12
SW
SGND
6 SS/SD BP10 11
7 VFB LDRV 10
8 COMP PGND 9
Simplified Schematic
TPS40054, TPS40055, TPS40057
SLUS593J – DECEMBER 2003 – REVISED JUNE 2022
with a variety
®
design with LM5145
Device Information
Part Number Package
TPS40054
TPS40055 HTSSOP (16)
TPS40057
For all available packages, see the orderable addendum at
the end of the data sheet.
Copyright © 2017, Texas Instruments Incorporated
of user-programmable
and LM5146.
(1)
Body Size (NOM)
5.00 mm × 4.40 mm
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