TPS54334

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4.2V to 28V Input voltage, 3A Output current Synchronous buck Converter with 570kHz fixed frequency

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Product details

Parameters

Vin (Min) (V) 4.2 Vin (Max) (V) 28 Vout (Min) (V) 0.8 Vout (Max) (V) 25 Iout (Max) (A) 3 Iq (Typ) (mA) 0.6 Switching frequency (Min) (kHz) 570 Switching frequency (Max) (kHz) 570 Features Enable, Light Load Efficiency, Synchronous Rectification, UVLO Adjustable, Power Good, Soft Start Fixed Operating temperature range (C) -40 to 85 Rating Catalog Regulated outputs (#) 1 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

  • Two 128mΩ/84mΩ MOSFETs for 3A Continuous
    Output Current
  • Power Good
  • Low 2 µA Shutdown Quiescent Current
  • 0.8 V Internal Voltage Reference with ±1.5%
    Accuracy Over Temperature
  • Fixed-Frequency Current Mode Control
  • Pulse Skipping Boosts Efficiency at Light Loads
  • Overcurrent Protection for Both MOSFETs with
    Hiccup Mode for Severe Fault Conditions
  • Thermal and Overvoltage Transient Protection
  • Available in Easy-to-Use 8-Pin SOIC
    PowerPAD™ and 10-Pin SON
  • Monotonic Start-Up into Pre-biased Outputs
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Description

The TPS54334 is a 28-V, 3-A, low quiescent supply current (IQ), synchronous monolithic buck converter with integrated MOSFETs.

The TPS54334 enables small designs by integrating the MOSFETs and implementing current mode control to reduce external component count.

Efficiency is maximized through the integrated 128mΩ/84mΩ MOSFETs, low quiescent supply current and pulse skipping at light loads. Using the enable pin, shutdown supply current is reduced to 2 µA by entering a shutdown mode.

The TPS54334 provides accurate regulation for a variety of loads with an accurate 1.5% voltage reference over temperature.

Cycle by cycle current limiting on the high-side fet protects the TPS54334 in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the part when die temperature exceeds thermal shutdown temperature and enables the part again after the built-in thermal hiccup time.

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Technical documentation

Design & development

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Hardware development

EVALUATION BOARDS Download
document-generic User guide
$99.00
Description

The TPS54334 is a 28-V, 3-A, low quiescent supply current (IQ), synchronous monolithic buck converter with integrated MOSFETs.The TPS54334 enables small designs by integrating the MOSFETs and implementing current mode control to reduce external component count.

Efficiency is maximized through the (...)

Features
  • Two 128mΩ/84mΩ MOSFETs for 3A Continuous Output Current
  • 0.8 V Internal Voltage Reference with ±1.5% Accuracy Over Temperature
  • Pulse Skipping Boosts Efficiency at Light Loads
  • Monotonic Start-Up into Pre-biased Outputs
  • Low 2 μA Shutdown Quiescent Current

 

Design tools & simulation

SIMULATION MODELS Download
SLVM891A.ZIP (30 KB) - PSpice Model
SIMULATION MODELS Download
SNVM704.ZIP (123 KB) - PSpice Model

CAD/CAE symbols

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

Ordering & quality

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