TPS54040A

ACTIVE

3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode

Top

Product details

Parameters

Vin (Min) (V) 3.5 Vin (Max) (V) 42 Vout (Min) (V) 0.8 Vout (Max) (V) 39 Iout (Max) (A) 0.5 Regulated outputs (#) 1 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 Control mode Current Mode Duty cycle (Max) (%) 98 Type Converter Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HVSSOP (DGQ) 10 15 mm² 3 x 4.9 VSON (DRC) 10 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)

Features

  • 3.5 V to 42 V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High Efficiency at Light Loads with a Pulse
    Skipping Eco-mode™
  • Tighter Enable Threshold than TPS54040
    for More Accurate UVLO Voltage
  • Adjustable UVLO Voltage and Hysteresis
  • 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/Sequencing
  • UV and OV Power Good Output
  • 0.8-V Internal Voltage Reference
  • Available in MSOP-10 and VSON-10 Packages
  • Supported by WEBENCH® and SwitcherPro™
    Software Tool
open-in-new Find other Buck converters (integrated switch)

Description

The TPS54040A device is a 42 V, 0.5 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 input supply current to 116 µA. Using the enable pin, shutdown supply current is nominally 1.3 µA when the enable pin is low.

Under voltage 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 or tracking. An open drain power good signal indicates when the output is within 94% to 107% of its nominal voltage.

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

open-in-new Find other Buck converters (integrated switch)
Download

Technical documentation

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$25.00
Description
The TPS54040EVM-456 evaluation module is designed to demonstrate the small printed-circuit-board areas that can be achieved when designing with the TPS54040 regulator. The TPS54040 dc/dc converter is designed to provide up to a 0.5-A output from an input voltage source of 3.5 V to 42 V. Rated input (...)

Design tools & simulation

SIMULATION MODELS Download
SLIM069.ZIP (66 KB) - PSpice Model
SIMULATION MODELS Download
SLIM277.ZIP (68 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLIM278.TSC (482 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLVM914A.ZIP (96 KB) - PSpice Model
SIMULATION MODELS Download
SLVMCU5.ZIP (1 KB) - PSpice Model
CALCULATION TOOLS Download
SLVC432A.ZIP (49 KB)

Reference designs

REFERENCE DESIGNS Download
Power Stage Reference Design for Power Stealing Thermostat
TIDA-01574 — This TI Design provides a reference design for low cost high efficiency power stealing for low cost smart thermostats and other building automation equipment. In general, power stealing enables to extend battery life of Wi-Fi enabled smart thermostats by drawing power from 24-V AC when the HVAC load (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
TPS54040A Inverting Buck/Boost Reference Design
PMP11791 — This reference design operates within 12-V to 20-V input voltage and delivers -14 V/200 mA at the output.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Interface to Sin/Cos Encoders with High-Resolution Position Interpolation Reference Design
TIDA-00176 The TIDA-00176 reference design is an EMC compliant industrial interface to Sin/Cos position encoders. Applications include industrial drives, which require accurate speed and position control.
The design utilizes a 16-bit dual sample ADC with drop-in compatible 14- or 12-bit versions available (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Power Supply with Programmable Output Voltage and Protection for Position Encoder Interfaces
TIDA-00180 This TI Design implements a universal power supply with programmable output voltage and innovative smart e-Fuse technology for use in a multi-standard position encoder interface module on an industrial drive. The eFuse provides inrush-current and over-current protection as well as user programmable (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Interface to a 5V BiSS Position Encoder Reference Design
TIDA-00175 This TI Design implements a hardware interface solution based on the BiSS standard for position or rotary encoders. It supports both BiSS Point-to-Point and BiSS Bus configurations.The building blocks include the power supply for a 5V BiSS encoder – with innovative smart e-Fuse technology (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Reference Design for an Interface to a Position Encoder with EnDat 2.2
TIDA-00172 This TI Design implements a hardware interface solution based on the HEIDENHAIN EnDat 2.2 standard for position or rotary encoders. The building blocks include the power supply for the encoder – with innovative smart e-Fuse technology - and robust half-duplex RS485 transceivers, including line (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
9 to 14Vin 3.3V/0.3A Buck Conv Ceramic Output Capacitor Switching @ 398kHz Reference Design
PMP8715 This design is a buck converter for automotive as well as for non-automotive applications. It delivers an output voltage of 3.3V @ 0.3A at an input voltage range of 9-14V. It can withstand input peaks up to 40V.
Design files

CAD/CAE symbols

Package Pins Download
HVSSOP (DGQ) 10 View options
VSON (DRC) 10 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​