4.5V to 15V Input, 0.35V to 2.0V Output, 35A PMBus Power Module


Product details


Iout (Max) (A) 35 Vin (Min) (V) 4.5 Vin (Max) (V) 15 Vout (Min) (V) 0.35 Vout (Max) (V) 2 Soft start Adjustable Features Current Sharing, EMI Tested, Enable, Frequency Synchronization, PMBus, Phase Interleaving, Power Good, Remote Sense, Tracking Operating temperature range (C) -40 to 105 Iq (Typ) (uA) 55000 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 1000 Switching frequency (Min) (kHz) 300 Duty cycle (Max) (%) 83 Topology Buck, Synchronous Buck open-in-new Find other Buck modules (integrated inductor)

Package | Pins | Size

QFM (MOL) 59 240 mm² 15 x 16 open-in-new Find other Buck modules (integrated inductor)


  • Complete Integrated PMBus™ Power Solution
  • Pin Compatible With TPSM846C24 (non-PMBus)
  • Stackable up to 70 A With Current Sharing
  • Output Voltage Range 0.35 V to 2 V
  • Output Voltage Accuracy as Tight as 0.5%
  • 15 mm × 16 mm Footprint (6.4 Max Height)
  • 300-kHz to 1-MHz Switching Frequency
  • Synchronization to an External Clock
  • Differential Remote Sense
  • Power-Good Output
  • Prebias Output Monotonic Start-Up
  • PMBus Telemetry: Current, Voltage, Temperature
  • Programmable Protection and Fault Response
  • Programmable UVLO, Soft Start/Stop, Delays
  • Operating IC Junction Range: –40°C to +125°C
  • Operating Ambient Range: –40°C to +105°C
  • Enhanced Thermal Performance: 8.7°C/W
  • Meets EN55022 Class A Emissions
  • Create a Custom Design Using the TPSM846C23 With the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

open-in-new Find other Buck modules (integrated inductor)


The TPSM846C23 is a 35-A fixed-frequency, PMBus-compliant, step-down power module, with PMBus commands that allow for the configuration, control, and monitoring of key power regulator functions. The module incorporates the controller, power MOSFETs, inductor, and associated components into a rugged, thermally enhanced, surface-mount package. The user supplies the input and output capacitors along with a few other passive components to set the operating parameters of the module. Two modules can be configured to work in parallel to provide up to a 70-A, two-phase power solution.

The PMBus interface provides for converter configuration of output voltage, UVLO, soft start, soft stop, overcurrent, and thermal shutdown parameters. The interface also provides support for telemetry that can report the actual output voltage, output current, and device temperature. Standard PMBus warning and fault functions are also supported. The device supports PMBus communication speeds up to 400 kHz and supports a subset of the commands in the PMBus 1.3 specification.

The 15-mm × 16-mm component footprint is easy to solder onto a printed circuit board and allows a compact, point-of-load design.

open-in-new Find other Buck modules (integrated inductor)
Similar products you might be interested in
open-in-new Compare products
Same functionality and pinout but is not an equivalent to the compared device:
TPSM846C24 ACTIVE 4.5-V to 15-V Input, 0.5-V to 2.0-V output, 35-A power module This product is a pin-compatible 35-A power module without PMBus for simpler design.

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 11
Type Title Date
* Data sheet TPSM846C23 4.5-V to 15-V Input, 0.35-V to 2-V Output, 35-A PMBus Power Module datasheet (Rev. F) Jan. 15, 2019
Application note Soldering Considerations for Power Modules (Rev. B) May 17, 2021
Technical article 3 ways to reduce power-supply noise with power modules Dec. 15, 2020
Technical article 3 big benefits of small cells May 26, 2020
White paper Power solution options for data center applications (Rev. A) Feb. 27, 2020
Application note Practical Thermal Design With DC/DC Power Modules (Rev. A) Nov. 20, 2019
White paper Small Cells, Big Impact: Designing Power Soutions for 5G Applications Jun. 26, 2019
User guide Operating TPSM846C23 in Parallel (Rev. C) Jun. 21, 2018
White paper Simplify low EMI design with power modules Nov. 20, 2017
User guide TPSM846C23, 35-A, PMBus, Swift Power Module EVM (Rev. A) Jun. 26, 2017
Technical article Save PCB space and overcome point-of-load design complexity with PMBus modules Mar. 27, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The TPSM846C23DEVM-807 evaluation module (EVM) is configured to evaluate the parallel operation of the TPSM846C23 PMBus power module for output currents up to 70 A. The input voltage range is 4.5 V to 15 V, with an output voltage range of 0.35 V to 2.0 V. The EVM’s PMBus interface allows (...)

  • 4.5V to 15V Input Voltage Range
  • Two TPSM846C23 devices in parallel
  • PMBus configurable
  • Up to 70A of Output Current
document-generic User guide

The TPSM846C23EVM-806 evaluation board (EVM) is configured to evaluate the operation of the TPSM846C23 PMBus power module for output currents up to 35 A. The input voltage range is 4.5 V to 15 V, with an output voltage range of 0.35 V to 2.0 V. The EVM’s PMBus interface allows power supply (...)

  • 4.5V to 15V Input Voltage Range
  • PMBus configurable
  • Up to 35A of Output Current

Software development

Digital Power Software
FUSION_DIGITAL_POWER_DESIGNER Fusion Digital Power™  is the Graphical User Interface (GUI) used to configure and monitor select Texas Instruments digital power controllers and sequencer/health monitors. The application uses the PMBus protocol to communicate with the device over serial bus by way of a TI USB adapter.

Some of the tasks you can perform with the GUI include:

  • Turn on or off the power supply output, either through the hardware control line or the PMBus OPERATION command
  • Monitor real-time data. Items such as input voltage, output voltage, output current, temperature, and warnings/faults are continuously (...)

Design tools & simulation

SLVMBY1A.ZIP (182 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
QFM (MOL) 59 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​