TPS54336A 4.5V to 28V Input, 3A, Synchronous Step-Down Converter with Eco-mode(tm) | TI.com

TPS54336A (ACTIVE) 4.5V to 28V Input, 3A, Synchronous Step-Down Converter with Eco-mode(tm)

 

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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WEBENCH® Designer TPS54336A

  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

Parametrics

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Part number Order 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 Type Package size: mm2:W x L (PKG)
TPS54336A Order now 4.5     28     0.8     24     3     1     340     340     0.6     Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable
Soft Start Adjustable    
Current Mode     90     -40 to 150     Catalog     SO PowerPAD | 8
VSON | 10    
Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
10VSON: 9 mm2: 3 x 3 (VSON | 10)    
TPS54202 Order now 4.5     28     0.6     26     2     1     500     500     0.04     Enable
Light Load Efficiency
Pre-Bias Start-Up
Spread Spectrum
Synchronous Rectification
UVLO Adjustable
Soft Start Fixed    
Current Mode     100     -40 to 125     Catalog     SOT-23-THIN | 6     Converter     6SOT-23-THIN: 5 mm2: 1.6 x 2.9 (SOT-23-THIN | 6)    
TPS54302 Order now 4.5     28     0.6     26     3     1     400     400     0.04     Enable
Light Load Efficiency
Pre-Bias Start-Up
Spread Spectrum
Synchronous Rectification
UVLO Adjustable
Soft Start Fixed    
Current Mode     100     -40 to 125     Catalog     SOT-23-THIN | 6     Converter     6SOT-23-THIN: 5 mm2: 1.6 x 2.9 (SOT-23-THIN | 6)    
TPS54334 Order now 4.2     28     0.8     25     3     1     570     570     0.6     Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable
Power Good
Soft Start Fixed    
Current Mode     90     -40 to 85     Catalog     SO PowerPAD | 8
VSON | 10    
Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
10VSON: 9 mm2: 3 x 3 (VSON | 10)    
TPS54335-1A Order now 4.5     28     0.8     24     3     1     50     1500     0.6     Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable
Soft Start Fixed    
Current Mode     90