TPS54541

ACTIVE

4.5V to 42V Input 5A Step-Down DC-DC Converter With Soft-Start and Eco-mode™

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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 42 Vout (Min) (V) 0.8 Vout (Max) (V) 41 Iout (Max) (A) 5 Iq (Typ) (uA) 152 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 2500 Features Enable, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Tracking, UVLO Adjustable Operating temperature range (C) -40 to 85 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

WSON (DPR) 10 16 mm² 4 x 4 open-in-new Find other Buck converters (integrated switch)

Features

  • High Efficiency at Light Loads with Pulse Skipping Eco-mode™
  • 87-mΩ High-Side MOSFET
  • 152-µA Operating Quiescent Current and 2-µA Shutdown Current
  • 100-kHz to 2.5-MHz Adjustable Switching Frequency
  • Synchronizes to External Clock
  • Low Dropout at Light Loads with Integrated BOOT Recharge FET
  • Adjustable UVLO Voltage and Hysteresis
  • UV and OV Power-Good Output
  • Adjustable Soft-Start and Sequencing
  • 0.8-V 1% Internal Voltage Reference
  • 10-Pin WSON with Thermal Pad Package
  • –40°C to 150°C TJ Operating Range
  • Create a Custom Design using the TPS54541 with the WEBENCH® Power Designer
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Description

The TPS54541 device is a 42-V 5-A step-down regulator with an integrated high-side MOSFET. The device survives load dump pulses up to 45 V per ISO 7637. Current mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no-load supply current to 152 µA. When the enable pin is pulled low, the shutdown supply current is reduced to 2 µA.

Undervoltage lockout is internally set at 4.3 V but can increase using an external resistor divider at the enable pin. The output voltage startup ramp is controlled by the soft-start pin that can also be configured for sequencing and tracking. An open-drain power-good signal indicates the output is within 93% to 106% of the nominal voltage.

A wide adjustable switching-frequency range allows for optimization of either efficiency or external component size. Cycle-by-cycle current limit, frequency foldback, and thermal shutdown protect internal and external components during an overload condition.

The TPS54541 device is available in a 10-pin 4-mm × 4-mm WSON package.

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Technical documentation

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Type Title Date
* Datasheet TPS54541 4.5-V to 42-V Input, 5-A Step-Down DC-DC Converter With Soft-Start and Eco-mode™ datasheet (Rev. C) Jan. 20, 2017
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guide Evaluation Module for the TPS54541 Step-Down Converter Nov. 05, 2013
Application note Creating a Universal Car Charger for USB Devices From the TPS54240 and TPS2511 (Rev. E) Sep. 16, 2013
Application note Create a Split-Rail Power Supply with a Wide Input Voltage Buck Regulator (Rev. A) Oct. 26, 2012
Application note Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) Oct. 26, 2012

Design & development

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

Hardware development

EVALUATION BOARD Download
49
Description

The TPS54541EVM-555 is a fully assembled and tested circuit for evaluating the TPS54541 Step-Down Converter. The TPS54541EVM-555 operates from a 6.0V to 42V input (12V nominal) and provides a 3.3V output at 5.0A.

Features
  • 4.5 V to 42 V Input Supply Voltage
  • Integrated 87-mΩ High Side N-Channel MOSFET
  • 152 µA Operating Quiescent Current
  • 2 µA Shutdown Current
  • 100 kHz to 2.5 MHz Switching Frequency
  • Adjustable UVLO Voltage and Hysteresis
  • Adjustable Soft-Start and Sequencing
  • UV and OV Power Good Output

 

Design tools & simulation

SIMULATION MODEL Download
SLVM981A.ZIP (740 KB) - PSpice Model
SIMULATION MODEL Download
SLVMCU0.ZIP (6 KB) - PSpice Model
SIMULATION TOOL Download
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 (...)
Features
  • 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
  • (...)
CALCULATION TOOL Download
SLVC452E.ZIP (245 KB)

Reference designs

REFERENCE DESIGNS Download
Industrial 15V – 42V VIN Power Reference Design With Dual VOUT of 1.2V@10A and 1V@10A
PMP15018 — The PMP15018 reference design incorporates the TPS54541 42V 5A DC/DC converter and two TPS56C215 17V, 12A DC/DC converters.  The solution operates from 15V to 42V input and generates 1.0V @10A and 1.2V@10A voltage rails.  The 1.0V and 1.2V converters operate at 1MHz and 400kHz respectively (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
WSON (DPR) 10 View options

Ordering & quality

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