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LMR33630 ACTIVE SIMPLE SWITCHER® 3.8V to 36V, 3A Synchronous Buck Converter With Ultra-Low EMI Smaller footprint, higher efficiency, lower IQ and lower EMI.

Product details

Vin (Min) (V) 5.5 Vin (Max) (V) 36 Vout (Min) (V) 1.23 Vout (Max) (V) 31 Iout (Max) (A) 3 Iq (Typ) (uA) 3000 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable, Over Current Protection Rating Catalog Regulated outputs (#) 1 Control mode Voltage Mode Duty cycle (Max) (%) 87
Vin (Min) (V) 5.5 Vin (Max) (V) 36 Vout (Min) (V) 1.23 Vout (Max) (V) 31 Iout (Max) (A) 3 Iq (Typ) (uA) 3000 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable, Over Current Protection Rating Catalog Regulated outputs (#) 1 Control mode Voltage Mode Duty cycle (Max) (%) 87
HSOIC (DDA) 8 19 mm² 4.9 x 3.9
  • Wide input voltage range:
    • TPS5430: 5.5 V to 36 V
    • TPS5431: 5.5 V to 23 V
  • Up to 3-A continuous (4-A peak) output current
  • High efficiency up to 95% enabled by 110-mΩ integrated MOSFET switch
  • Wide output voltage range: adjustable down to 1.22 V with 1.5% initial accuracy
  • Internal compensation minimizes external parts count
  • Fixed 500-kHz switching frequency for small filter size
  • Improved line regulation and transient response by input voltage feedforward
  • System protected by overcurrent limiting, overvoltage protection, and thermal shutdown
  • –40°C to 125°C operating junction temperature range
  • Available in small thermally enhanced 8-pin SO PowerPAD™ package
  • Create a custom design using the TPS5430 with the WEBENCH Power Designer
  • Wide input voltage range:
    • TPS5430: 5.5 V to 36 V
    • TPS5431: 5.5 V to 23 V
  • Up to 3-A continuous (4-A peak) output current
  • High efficiency up to 95% enabled by 110-mΩ integrated MOSFET switch
  • Wide output voltage range: adjustable down to 1.22 V with 1.5% initial accuracy
  • Internal compensation minimizes external parts count
  • Fixed 500-kHz switching frequency for small filter size
  • Improved line regulation and transient response by input voltage feedforward
  • System protected by overcurrent limiting, overvoltage protection, and thermal shutdown
  • –40°C to 125°C operating junction temperature range
  • Available in small thermally enhanced 8-pin SO PowerPAD™ package
  • Create a custom design using the TPS5430 with the WEBENCH Power Designer

The TPS543x is a high-output-current PWM converter that integrates a low-resistance, high-side N-channel MOSFET. Included on the substrate with the listed features are a high-performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5 V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18 µA typically. Other features include an active-high enable, overcurrent limiting, over-voltage protection and thermal shutdown. To reduce design complexity and external component count, the TPS543x feedback loop is internally compensated. The TPS5431 is intended to operate from power rails up to 23 V. The TPS5430 regulates a wide variety of power sources including 24 V bus.

The TPS543x device is available in a thermally enhanced, easy to use 8-pin SOIC PowerPAD™ package. TI provides evaluation modules and the Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

The TPS543x is a high-output-current PWM converter that integrates a low-resistance, high-side N-channel MOSFET. Included on the substrate with the listed features are a high-performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5 V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18 µA typically. Other features include an active-high enable, overcurrent limiting, over-voltage protection and thermal shutdown. To reduce design complexity and external component count, the TPS543x feedback loop is internally compensated. The TPS5431 is intended to operate from power rails up to 23 V. The TPS5430 regulates a wide variety of power sources including 24 V bus.

The TPS543x device is available in a thermally enhanced, easy to use 8-pin SOIC PowerPAD™ package. TI provides evaluation modules and the Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

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Technical documentation

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Type Title Date
* Data sheet TPS543x 3-A, Wide Input Range, Step-Down Converter datasheet (Rev. J) PDF | HTML 15 Jul 2022
User guide TPS543x Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 11 Oct 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Laying out an inverting buck-boost converter for success 28 Sep 2016
EVM User's guide TSW3070EVM: Amplifier Interface to Current Sink DAC - (Rev. A) 23 May 2016
Application note Simplifying Stability Checks (Rev. B) 05 Nov 2013
More literature Исходные проекты ll 13 May 2011
User guide Voltage-Controlled Amplifier Evaluation Kit 25 Aug 2008
EVM User's guide TPS5430EVM-342 2.25-A, Inverting Buck-Boost Regulator Evaluation Module 13 Jun 2008
More literature TPS5430DDA Test Report 19 Feb 2008
Analog Design Journal Using a buck converter in an inverting buck-boost topology 12 Oct 2007
Application note Using the TPS5430 As An Inverting Buck Boost Converter (Rev. A) 15 Aug 2007
Application note Using TPS5410/20/30/31/50 w/Aluminum/Ceramic Output Capacitors (Rev. C) 21 Mar 2007

Design & development

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

Evaluation board

TPS5430EVM-173 — TPS5430 35V Input, 5V Output, 3A Evaluation Module

The TPS5430EVM-173 evaluation module allows the designer to evaluate the TPS5430 SWIFT DC/DC converter and is designed with external components to operate over a wide input voltage range. The input voltage range of this module is 9.0 V to 36 V and the output voltage is pre-set to (...)

User guide: PDF | HTML
Not available on TI.com
Evaluation board

TPS5430EVM-342 — TPS5430EVM-342 2.25A Inverting Buck Boost Regulator Evaluation Module

The TPS5430EVM-342 evaluation module features the TPS5430 converter IC in a 2.25 A, inverting buck-boost design. The TPS5430 dc/dc converter is designed to provide up to a 3.0 A output from an input voltage source of 5.5 V to 36 V. Table 1 of the User Guide provides the rated input voltage and (...)
User guide: PDF
Not available on TI.com
Evaluation board

TPS5431EVM-173 — 9V to 21Vin, 3A Step Down Converter

The TPS5431EVM-173 evaluation module allows the designer to evaluate the TPS5431 SWIFT DC/DC converter and is designed with very few external components. The input voltage range of this module is 9.0 V to 21 V and the output voltage is pre-set to 5 V. The output voltage can be easily (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS5430 PSpice Transient Model

SLVMAC8.ZIP (359 KB) - PSpice Model
Simulation model

TPS5430 TINA-TI Transient Inverting Reference Design

SLVM096.TSC (2089 KB) - TINA-TI Reference Design
Simulation model

TPS5430 TINA-TI Transient Spice Model

SLVM095.TSM (12 KB) - TINA-TI Spice Model
Simulation model

TPS5430 TINA-TI Transient Start-up 5V Buck Reference Design (Rev. A)

SLVM006A.TSC (696 KB) - TINA-TI Reference Design
Simulation model

TPS5430 TINA-TI Transient Start-up LED Driver Reference Design (Rev. A)

SLVM008A.TSC (8869 KB) - TINA-TI Reference Design
Simulation model

TPS5430 Unencrypted PSpice Transient Model

SLVMCU8.ZIP (5 KB) - PSpice Model
Bill of materials (BOM)

TPS5430DDA Bill of Materials

SLUR019.PDF (25 KB)
Schematic

TPS5430DDA Schematic

SLUR020.PDF (32 KB)
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 (...)
Reference designs

TIDEP0040 — Software Defined Radio (SDR) OMAPL-138-based Hardware & Software Reference Design

Software Defined Radio (SDR) is a popular application within the wireless infrastructure market.  This hardware reference design, leveraging the real time signal processing of the TI DSP and its Universal Parallel Port (uPP), along with TI ADC and DAC, offers SDR algorithm developers a quick (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDEP0038 — Vision Analytics OMAPL-138-based Hardware & Software Reference Design

Vision analytics is a critical function for many industrial automated applications including machine vision, inspection automation, surveillance and image processing.  This hardware/software design kit is optimized for vision analytic based applications and provides the all of hardware design (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00075 — Wide-Bandwidth and High-Voltage Arbitrary Waveform Generator Front End

This design shows how to use an active interface with the current sink output of the DAC5682Z - typical applications for this include front ends for arbitrary waveform generators. The EVM includes the DAC5682Z for digital-to-analog conversion, an OPA695 to demonstrate an active interface (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
SO PowerPAD (DDA) 8 View options

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