TPS54335-2A

ACTIVE

4.5V to 28V Input, 3A, Synchronous Step-Down Converter With Eco-mode

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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 28 Vout (Min) (V) 0.8 Vout (Max) (V) 24 Iout (Max) (A) 3 Iq (Typ) (mA) 0.6 Iq (Typ) (uA) 600 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1500 Features Enable, Light Load Efficiency, Synchronous Rectification, UVLO Adjustable, 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

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

Features

  • Synchronous 128-mΩ and 84-mΩ MOSFETs for
    3-A Continuous Output Current
  • Internal 2-ms Soft-Start,
    50-kHz to 1.5-MHz Adjustable Frequency
  • Low 2-µA Shutdown, Quiescent Current
  • 0.8-V Voltage Reference with ±0.8% Accuracy
  • Current Mode Control
  • Monotonic Startup into Pre-Biased Outputs
  • Pulse Skipping for Light-Load Efficiency
  • Hiccup Mode Overcurrent Protection
  • Thermal Shutdown (TSD) and
    Overvoltage Transition Protection
  • 10-Pin VSON Package
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Description

The TPS54335-2A synchronous converter with an input-voltage range of 4.5 V to 28 V. This device has an integrated low-side switching FET that eliminates the need for an external diode which reduces component count.

Efficiency is maximized through the integrated 128-mΩ and 84-mΩ MOSFETs, low IQ and pulse skipping at light loads. Using the enable pin, the shutdown supply current is reduced to 2 μA. This step-down (buck) converter provides accurate regulation for a variety of loads with a well-regulated voltage reference that is 1.5% over temperature.

Cycle-by-cycle current limiting on the high-side MOSFET protects the TPS54335-2A in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. A low-side sinking current-limit turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection is triggered if the overcurrent condition continues for longer than the preset time. Thermal shutdown disables the device when the die temperature exceeds the threshold and enables the device again after the built-in thermal hiccup time.

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Technical documentation

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Type Title Date
* Datasheet TPS54335-2A 4.5-V to 28-V Input, 3-A Output, Synchronous Step-Down DC-DC Converter datasheet Jul. 10, 2016
Application notes Methods to Solve Reverse Current-caused Damage in Synchronous Buck Converter Apr. 30, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes How to Estimate Overshoot and Undershoot of Load Transients of a DC/DC Regulator Dec. 20, 2017

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CAD/CAE symbols

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VSON (DRC) 10 View options

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