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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.76 Vout (Max) (V) 7 Iout (Max) (A) 4 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 650 Switching frequency (Max) (kHz) 650 Features Enable, Synchronous Rectification, Soft Start Adjustable Control mode Current Mode Duty cycle (Max) (%) 65 Type Converter Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 VSON (DRC) 10 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)

Features

  • D-CAP2™ Mode Enables Fast Transient
    Response
  • Low Output Ripple and Allows Ceramic Output
    Capacitor
  • Wide VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 7.0 V
  • Highly Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    – 70 mΩ (High Side) and 53 mΩ (Low Side)
  • High Efficiency, Less Than 10 µA at Shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 650-kHz Switching Frequency (fSW)
  • Cycle by Cycle Over Current Limit
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Description

The TPS54427 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54427 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution.

The main control loop for the TPS54427 uses the D-CAP2™ mode control which provides a fast transient response with no external compensation components.

The TPS54427 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors.

The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 7 V.

The device also features an adjustable soft start time.

The TPS54427 is available in the 8-pin DDA package and 10-pin DRC, and is designed to operate from –40°C to 85°C.

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Technical documentation

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Type Title Date
* Datasheet TPS54427 4.5-V to 18-V Input, 4-A Output Single Synchronous Step-Down Switcher With Integrated FET datasheet (Rev. C) Feb. 10, 2016
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes Optimize Output Filter on D-CAP2 for Stability Improvement Jun. 13, 2017
Application notes D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- Jan. 02, 2013
User guides TPS54427, 4-A, SWIFT™ Regulator Evaluation Module Nov. 30, 2011

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 TPS54427EVM-052 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS54427 Synchronous Step-Down DC-DC Converter. The EVM operates from a 4.5V to 18V input and provides a 1.05V output at up to 4A. The main control loop for the EVM uses D-CAP2 mode control, which (...)
Features
  • 4.5V to 18V Input Voltage Range
  • D-CAP2 Mode Enables Fast Transient Response
  • 1.05V Output Voltage
  • 4A Output Current

Design tools & simulation

SIMULATION MODELS Download
SLVM452.ZIP (274 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
High efficiency power supply architecture reference design for protection relay processor module
TIDA-010011 — This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options
VSON (DRC) 10 View options

Ordering & quality

Support & training

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