Home Energiemanagement DC/DC-Schaltregler DC/DC-Wandler

TPS54140

AKTIV

Abwärtswandler, 3,5 V bis 42 V Eingangsspannung, 1,5 A, mit Eco-Mode

Eine neuere Version dieses Produkts ist verfügbar

Selbe Funktionalität wie der verglichene Baustein bei abweichender Anschlussbelegung.
LMR33620 AKTIV Synchroner SIMPLE SWITCHER®-Abwärtswandler (3,8 bis 36 V, 2 A) mit extrem geringer Störaussendung (E Smaller footprint, higher efficiency, lower IQ and lower EMI.

Produktdetails

Rating Catalog Topology Buck Iout (max) (A) 1.5 Vin (max) (V) 42 Vin (min) (V) 3.5 Vout (max) (V) 39 Vout (min) (V) 0.8 Features Enable, Frequency synchronization, Light-load efficiency, Power good, Tracking, UVLO adjustable Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000116 Duty cycle (max) (%) 98
Rating Catalog Topology Buck Iout (max) (A) 1.5 Vin (max) (V) 42 Vin (min) (V) 3.5 Vout (max) (V) 39 Vout (min) (V) 0.8 Features Enable, Frequency synchronization, Light-load efficiency, Power good, Tracking, UVLO adjustable Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000116 Duty cycle (max) (%) 98
HVSSOP (DGQ) 10 14.7 mm² (3 mm × 4.9 mm)
  • 3.5- to 42-V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High Efficiency at Light Loads with a
    Pulse Skipping Eco-mode™
  • 116-µA Operating Quiescent Current
  • 1.3-µA Shutdown Current
  • 100-kHz to 2.5-MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start and Sequencing
  • UV and OV Power-Good Output
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V Internal Voltage Reference
  • MSOP10 Package With PowerPAD
  • Supported by WEBENCH® Software Tool
    (www.TI.com/WEBENCH)
  • 3.5- to 42-V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High Efficiency at Light Loads with a
    Pulse Skipping Eco-mode™
  • 116-µA Operating Quiescent Current
  • 1.3-µA Shutdown Current
  • 100-kHz to 2.5-MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start and Sequencing
  • UV and OV Power-Good Output
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V Internal Voltage Reference
  • MSOP10 Package With PowerPAD
  • Supported by WEBENCH® Software Tool
    (www.TI.com/WEBENCH)

The TPS54140 device is a 42-V, 1.5-A, step-down regulator with an integrated high-side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no load, regulated output-supply current to 116 µA. Using the enable pin, the shutdown supply current is reduced to 1.3 µA.

Undervoltage lockout is internally set at 2.5 V, but can be increased using the enable pin. The output-voltage startup ramp is controlled by the slow-start pin that can also be configured for sequencing and tracking. An open-drain power-good signal indicates the output is within 94% to 107% of the nominal voltage.

A wide switching frequency range allows efficiency and external component size to be optimized. Frequency foldback and thermal shutdown protects the device during an overload condition.

The TPS54140 device is available in a 10-pin thermally enhanced MSOP PowerPAD package.

The TPS54140 device is a 42-V, 1.5-A, step-down regulator with an integrated high-side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no load, regulated output-supply current to 116 µA. Using the enable pin, the shutdown supply current is reduced to 1.3 µA.

Undervoltage lockout is internally set at 2.5 V, but can be increased using the enable pin. The output-voltage startup ramp is controlled by the slow-start pin that can also be configured for sequencing and tracking. An open-drain power-good signal indicates the output is within 94% to 107% of the nominal voltage.

A wide switching frequency range allows efficiency and external component size to be optimized. Frequency foldback and thermal shutdown protects the device during an overload condition.

The TPS54140 device is available in a 10-pin thermally enhanced MSOP PowerPAD package.

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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt TPS54140 1.5-A, 42-V Step-Down DC-DC Converter With Eco-mode™ datasheet (Rev. C) PDF | HTML 14.11.2014
Anwendungshinweis Understanding Eco-mode(TM) Operation 05.12.2016
Anwendungshinweis Design Considerations for DC-DC Converters in Fast-Input Slew Rate Applications 05.03.2015
Anwendungshinweis Differences between the TPS54x40, TPS54x60 and the TPS54x40A, TPS54x60A 17.04.2013
Anwendungshinweis Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) 26.10.2012
Anwendungshinweis Level Shifting Control for an Inverting Buck-boost 10.10.2012
EVM User's guide TPS54140EVM-429 1.5 A, SWIFT Regulator Evaluation Module 19.03.2008

Design und Entwicklung

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Evaluierungsplatine

TPS54140EVM-429 — TPS54140 42 V-Eingang, 3,3 V-Ausgang, 1,5 A – Evaluierungsmodul

The TPS54140EVM-429 evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS54140 regulator. The TPS54140 dc/dc converter is designed to provide up to a 1.5 A output from an input voltage source of 3.5 V to 42 V. Rated (...)
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Simulationsmodell

TPS54140 PSpice Average Model

SLVM545.ZIP (232 KB) - PSpice-Modell
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TPS54140 PSpice Transient Model (Rev. A)

SLIM040 (90 KB) - PSpice-Modell
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TPS54140 TINA-TI Average Reference Design

SLVM549.TSC (623 KB) - TINA-TI-Referenzdesign
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TPS54140 TINA-TI Average Spice Model

SLVM548.ZIP (7 KB) - TINA-TI Spice-Modell
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TPS54140 TINA-TI Steady State Reference Design

SLIM280.TSC (380 KB) - TINA-TI-Referenzdesign
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TPS54140 TINA-TI Transient Spice Model

SLIM279.ZIP (68 KB) - TINA-TI Spice-Modell
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TPS54140 Unencrypted PSpice Average Model

SLVMD09.ZIP (1 KB) - PSpice-Modell
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TPS54140 Unencrypted PSpice Transient Model

SLVMCZ7.ZIP (8 KB) - PSpice-Modell
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Berechnungstool

SLVC432 — TPS54x40 and TPS54x60 Buck Design Spreadsheet

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Berechnungstool

SWIFTINV-CALC — SWIFT™ Converter Inverting Buck/Boost Calculator

The SWIFTINV-CALC Excel sheet is a complementary worksheet to the SLVA317 application note. The worksheet is used to calculate the external components needed to create a negative output voltage from a positive input voltage. The tool features several families of wide input voltage, current-mode (...)

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SWIFTPOSNEG-CALC — TPS54160 Pos/Neg Calculation Utility Download

The SWIFTPosNeg-CALC Excel sheet is a complementary worksheet to the SLVA369 application note.

This worksheet is used to calculate the external components needed to create a dual output (i.e. positive and negative) power supply using a step-down switching regulator and catalog off the shelf coupled (...)

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