TPS54335A 4.5V to 28V Input, 3A, Synchronous, Step-Down Converter with Eco-mode | TI.com

TPS54335A (ACTIVE)

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

4.5V to 28V Input, 3A, Synchronous, Step-Down Converter with Eco-mode - TPS54335A
 

Description

The TPS5433xA family of devices are synchronous converters with an input-voltage range of 4.5 to 28 V. These devices include 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 TPS5433xA family of devices 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.

Features

  • Synchronous 128-mΩ and 84-mΩ MOSFETs for
    3-A Continuous Output Current
  • TPS54335A: Internal 2-ms Soft-Start,
    50-kHz to 1.5-MHz Adjustable Frequency
  • TPS54336A: Adjustable Soft-Start,
     Fixed 340-kHz 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
  • 8-Pin SO PowerPAD and 10-Pin VSON Packages

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Parametrics Compare all products in Buck Converter (Integrated Switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
TPS54335A TPS54202 TPS54302 TPS54336A TPS56637
4.5     4.5     4.5     4.5     4.5    
28     28     28     28     28    
0.8     0.6     0.6     0.8     0.6    
25     26     26     25     16    
3     2     3     3     6    
1     1     1     1     1    
50     390     290     340     500    
1500     590     510     340     500    
0.6     0.04     0.04     0.6     0.125    
Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable    
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable    
Enable
Forced Pulse Width Modulation (FPWM) Mode
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Current Mode     Current Mode     Current Mode     Current Mode     D-CAP3    
90     100     100     90     91    
-40 to 150     -40 to 125     -40 to 125     -40 to 150     -40 to 125    
Catalog     Catalog     Catalog     Catalog     Catalog    
SO PowerPAD
VSON    
SOT-23-THIN     SOT-23-THIN     SO PowerPAD
VSON    
VQFN-HR    
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WEBENCH® Designer TPS54335A

  Min   Max Range
Vin  V 4.5 to 28.0V
Vout  V 0.8 to 25V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 150°C


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