TPS54283

ACTIVE

4.5V to 28V Input, Dual 2A Output, 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) 2 Iq (Typ) (mA) 1.8 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 300 Features Enable, Phase Interleaving Operating temperature range (C) -40 to 85 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 2 A
  • Two Fixed Switching Frequency Versions:
    • TPS54283: 300 kHz
    • TPS54286: 600 kHz
  • Two 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
  • 100-m Internal High-Side MOSFETs
  • Current Mode Control
  • Internal Compensation (See Page 16)
  • Pulse-by-Pulse Overcurrent Protection
  • Thermal Shutdown Protection at 148°C
  • 14-Pin PowerPAD™ HTSSOP package
  • APPLICATIONS
    • Set Top Box
    • Digital TV
    • Power for DSP
    • Consumer Electronics

PowerPAD Is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.

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Description

TPS54283 and TPS54286 are dual output non-synchronous buck converters capable of supporting 2-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 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 3 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 not needing the full load capability of both outputs.

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

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Technical documentation

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Type Title Date
* Datasheet 2-A DUAL NON-SYNCHRONOUS CONVERTER WITH INTEGRATED HIGH SIDE MOSFET datasheet (Rev. C) Oct. 16, 2007
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
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
$49.00
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
SLIM107.ZIP (200 KB) - PSpice Model
SIMULATION MODELS Download
SLUM037.ZIP (165 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM038.ZIP (4 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLUM073.TSC (1302 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM074.TSM (25 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLUM092A.ZIP (115 KB) - PSpice Model
SIMULATION MODELS Download
SLVJ011A.ZIP (165 KB) - TINA-TI Reference Design

Reference designs

REFERENCE DESIGNS Download
FPGA/ DDR2 Supply
PMP5712 — The PMP5712.1 is the first block of a FPGA/DDR2 power supply. This block provide 5V @ 300mA, 1Amax from 8V…14V input voltage. An external 0…12V input enables the converter.

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 14 View options

Ordering & quality

Support & training

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