Stackable 2 Channel Multiphase or 2 Channel Independent Output Controller

TPS40140 is not recommended for new designs.
This product continues to be in production to support existing customers. Please consider one of these alternatives:
Similar but not functionally equivalent to the compared device:
TPS40322 ACTIVE Dual Output or Two-phase Synchronous Buck Controller This product has an increased feature set and wider operating range.

Product details


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  • VDD from 4.5 to 15 V, With Internal 5-V Regulator
  • VOUT from 0.7 V to 5.8 V
  • Converts from 15-V Input to 0.7-V Output at
    1 MHz
  • Dual-Output or 2-Phase Interleaved Operation,
    Stackable to 16 Phases
  • Supports Prebiased Outputs
  • Programmable Switching Frequency up to
    1 MHz/Phase
  • 0.5% Internally Trimmed 0.7-V Reference
  • 10-µA Shutdown Current
  • Current Mode Control With Forced Current
  • 1- to 40-V Power Stage Operation Range
  • Power Sharing From Different Input Voltage Rails,
    (for Example, Master From 5 V, Slave From 12 V)
  • True Remote Sensing Differential Amplifier
  • Programmable Input Undervoltage Lockout
  • Resistive or Inductor DCR Current Sensing
  • Provide a 6-Bit Digitally Controlled Output
    When Used With TPS40120
  • 36-Pin VQFN Package
open-in-new Find other Buck controllers (external switch)


The TPS40140 is a multifunctional synchronous buck controller that can be configured to provide either a single-output 2-phase power supply or a power supply that supports two independent outputs. Several TPS40140 controllers can be stacked up to a 16-phase single output power supply. Alternatively, several controllers providing multiple independent outputs can be synchronized in an interleaving pattern for improved input ripple current.

The TPS40140 can convert from a 15-V input to a 0.7-V output at 1 MHz.

Each phase operates at a switching frequency of up to 1 MHz. The two phases in one device operate 180° out-of-phase. In a multiple-device stackable configuration, the phase shift of the slaves, relative to a master, is programmable.

open-in-new Find other Buck controllers (external switch)

Technical documentation

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Type Title Date
* Datasheet TPS40140 Dual or 2-Phase, Stackable Controller datasheet (Rev. I) Jan. 31, 2015
Application notes Multiphase Buck Design from Start to Finish, Part 1 (Rev. A) May 24, 2019
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles Power Tips - DDR memory is everywhere! Mar. 01, 2014
Technical articles Power Tips: When to choose multiphase Oct. 31, 2013
Technical articles Powering FPGAs made easy Jul. 30, 2013
User guides TPS40140EVM-003 A 32A Single Output Two Phase Stackable Sync Buck Converter (Rev. A) Jan. 21, 2010
More literature TPS40140RHH Test Report Feb. 15, 2008
Application notes Spreadsheet modeling tool for AAJ Article SLYT273 Jun. 05, 2007
Application notes Spreadsheet modeling tool helps analyze power- and ground-plane voltage drops May 18, 2007
User guides Using the TPS40140EVM-002 (Rev. A) Jan. 05, 2007

Design & development

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Design tools & simulation

SLIM023.ZIP (115 KB) - PSpice Model
SLIM051.TSC (157 KB) - TINA-TI Reference Design
SLIM052.ZIP (109 KB) - TINA-TI Spice 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
  • (...)
SLUR007.PDF (28 KB)
SLUR008.PDF (87 KB)
SLVR356.PDF (193 KB)

Reference designs

Many TI reference designs include the TPS40140 Use our reference design selection tool to review and identify designs that best match your application and parameters.

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VQFN (RHH) 36 View options

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