TPS54383

ACTIVE

4.5V to 28V Input, Dual 3A Outputs, 300kHz Step-Down Converter with Internal Compensation

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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 28 Vout (Min) (V) 0.8 Vout (Max) (V) 25.2 Iout (Max) (A) 3 Iq (Typ) (mA) 1.8 Iq (Typ) (uA) 1800 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 300 Features Enable, Phase Interleaving Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 2 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 14 32 mm² 5 x 6.4 open-in-new Find other Buck converters (integrated switch)

Features

  • 4.5-V to 28-V Input Range
  • Output Voltage Range 0.8 V to 90% of Input
    Voltage
  • Output Current Up to 3 A
  • Two Fixed Switching Frequency Versions:
    • TPS54383: 300 kHz
    • TPS54386: 600 kHz
  • Three Selectable Levels of Overcurrent Protection
    (Output 2)
  • 0.8-V 1.5% Voltage Reference
  • 2.1-ms Internal Soft-Start
  • Dual PWM Outputs 180° Out-of-Phase
  • Ratiometric or Sequential Startup Modes Selectable
    by a Single Pin
  • 85-mΩ Internal High-Side MOSFETs
  • Current Mode Control
  • Internal Compensation
  • Pulse-by-Pulse Overcurrent Protection
  • Thermal Shutdown Protection at +148\xC2°C
  • 14-Pin PowerPAD™ HTSSOP package
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Description

The TPS54383 and TPS54386 are dual output, non-synchronous buck converters capable of supporting 3-A output applications that operate from a 4.5-V to 28-V input supply voltage, and require output voltages between 0.8 V and 90% of the input voltage.

With an internally-determined operating frequency, soft-start time, and control loop compensation, these converters provide many features with a minimum of external components. Channel 1 overcurrent protection is set at 4.5 A, while Channel 2 overcurrent protection level is selected by connecting a pin to ground, to BP, or left floating. The setting levels are used to allow for scaling of external components for applications that do not need the full load capability of both outputs.

The outputs may be enabled independently, or may be configured to allow either ratio-metric or sequential startup sequencing. Additionally, the two outputs may be powered from different sources.

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Technical documentation

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Type Title Date
* Datasheet TPS5438x Dual 3-A Non-Synchronous Converters With Integrated High-Side MOSFET datasheet (Rev. C) Dec. 15, 2014
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guides Using the TPS54383EVM (Rev. C) Jan. 22, 2008

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
49
Description

The TPS54383EVM evaluation module (EVM) is a dual non-synchronous buck converter providing fixed 5.0 V and 3.3 V output at up to 2 A each from a 12 V input bus.

The EVM is designed to start up from a single supply, so no additional bias voltage is required for start-up. The module uses the TPS54383 Dual (...)

Features
  • 12 V (+10% / -20%) Input Range
  • 5.0 V and 3.3 V Fixed Output Voltage, Adjustable with Resistor Change
  • 2 ADC Steady State Output Current (3 A Peak)
  • 300 kHz Switching Frequency (fixed by TPS54383)
  • Internal Switching MOSFET and External Rectifier Diode
  • Double Sided 2 Active Layer PCB (all components on top (...)

Design tools & simulation

SIMULATION MODELS Download
SLLM057A.ZIP (184 KB) - PSpice Model
SIMULATION MODELS Download
SLUC124A.ZIP (4 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLUM035.ZIP (165 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM036.ZIP (165 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM071.TSC (1070 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM072.TSM (25 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLUM089A.ZIP (122 KB) - PSpice Model
SIMULATION TOOLS 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
  • (...)

Reference designs

REFERENCE DESIGNS Download
12V Input, Dual Output (5V/3A & 3.3V/3A) Buck Converter
PMP4961 — The PMP4961 design offers a low cost and efficient solution for 12V systems that require both a 5V and 3.3V rail. This design uses only ceramic output capacitors for reduced size and improved reliability.

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 14 View options

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