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 functionality 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
    Sharing(1)
  • 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
    (UVLO)
  • Resistive or Inductor DCR Current Sensing
  • Provide a 6-Bit Digitally Controlled Output
    When Used With TPS40120
  • 36-Pin VQFN Package
  • 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
    Sharing(1)
  • 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
    (UVLO)
  • Resistive or Inductor DCR Current Sensing
  • Provide a 6-Bit Digitally Controlled Output
    When Used With TPS40120
  • 36-Pin VQFN Package

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.

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.

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Technical documentation

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Type Title Date
* Data sheet TPS40140 Dual or 2-Phase, Stackable Controller datasheet (Rev. I) 31 Jan 2015
Application note Multiphase Buck Design from Start to Finish, Part 1 (Rev. B) 07 Apr 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Power Tips - DDR memory is everywhere! 01 Mar 2014
Technical article Power Tips: When to choose multiphase 31 Oct 2013
User guide TPS40140EVM-003 A 32A Single Output Two Phase Stackable Sync Buck Converter (Rev. A) 21 Jan 2010
More literature TPS40140RHH Test Report 15 Feb 2008
Analog design journal Spreadsheet modeling tool for AAJ Article SLYT273 05 Jun 2007
Analog design journal Spreadsheet modeling tool helps analyze power- and ground-plane voltage drops 18 May 2007
User guide Using the TPS40140EVM-002 (Rev. A) 05 Jan 2007

Design & development

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

Simulation model

TPS40140 PSpice Transient Model

SLIM023.ZIP (115 KB) - PSpice Model
Simulation model

TPS40140 TINA-TI Transient Reference Design

SLIM051.TSC (157 KB) - TINA-TI Reference Design
Simulation model

TPS40140 TINA-TI Transient Spice Model

SLIM052.ZIP (109 KB) - TINA-TI Spice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Schematic

TPS40140RHH Schematic

SLUR008.PDF (87 KB)
Schematic

PMP5149 3

SLVR356.PDF (193 KB)
Bill of materials (BOM)

TPS40140RHH Bill of Materials

SLUR007.PDF (28 KB)
Reference designs

PMP3061 — Multiphase, Sync Buck, Buck-Boost, Boost for IP Converter (25V @ 1A)

PMP3061 is a multiple output power supply that supports a number of different rails. The input for this design is 12V with the following devices and outputs TPS40140 (1.2V@40A), TPS40190 (3.3V@6A), TPS54350 (-5V@200mA), TPS40210 (25V@1A), TPS5430 (-12V@200mA). The supply has a range of (...)
Reference designs

PMP4590 — Sync buck (5V@10)

This interleaved Buck converter can be configured as single output (interleaved) or dual output. The board has the extention feature to drive a slave unit.
Reference designs

PMP9035 — High Current Four Phase Synchronous Buck 5V@55A Reference Design

Two TPS40140 control ICs are used to build a four phase synchronous buck converter.  The input voltage is 12V with an output of 5V at up to 55A.  A four phase design allows for very high efficiency and helps to spread the heat out on the PCB.  The design was built and tested using (...)
Reference designs

PMP5738 — High current core/ASIC/FPGA supply

70Amps/100Amax high current ASIC core supply, four phases w/ 2x TPS40140, for use with 12V bus system
Reference designs

PMP4594 — TPS40140 Dual Phase Supply

universal buck & board for dual & interleaved outputs at TPS40140; RevE2 = interleaved, single output & tested, RevF = dual output
Reference designs

PMP6845 — 5V input; 6 Phase High Efficiency Synchronous Buck; 0.9V 120A output

The PMP6845 reference design uses three TPS40140's to control 6 Synchronous Buck Phases. Main switch pair for each phase is the dual CSD86350Q5D. The optional added CSD16325Q5 for the low side enhances efficiency, especially at full load. Efficiency is 87.5% at full load and over 90% for loads (...)
Package Pins Download
VQFN (RHH) 36 View options

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