TPS54335A (ACTIVE)

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

 

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

View more

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 TPS5402 TPS5403 TPS5405 TPS54231 TPS54232 TPS54233 TPS54302 TPS54308 TPS54331 TPS54332 TPS54334 TPS54335-1A TPS54335-2A TPS54336A TPS54531
4.5    3.5    4.5    6.8    3.5    3.5    3.5    4.5    4.5    3.5    3.5    4.2    4.5    4.5    4.5    3.5   
28    28    28    28    28    28    28    28    28    28    28    28    28    28    28    28   
0.8    0.8    3.3    4.85    0.8    0.8    0.8    0.6    1    0.8    0.8    0.8    0.8    0.8    0.8    0.8   
25    26    3.3    5.15    25    25    25    26    26    25    25    25    25    25    25    25   
3    1.7    1.7    2    2    2    2    3    3    3    3.5    3    3    3    3    5   
1    1    1    1    1    1    1    1    1    1    1    1    1    1    1    1   
50    50    50    50    570    1000    300    400    350    570    1000    570    50    50    340    570   
1500    1100    1100    1100    570    1000    300    400    350    570    1000    570    1500    1500    340    570   
0.6    0.1    0.1    100    0.075    0.085    0.075    0.04    0.3    0.11    0.082    0.6    0.6    0.6    0.6    0.11   
Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable   
Light Load Efficiency    Light Load Efficiency    Light Load Efficiency    Enable
Light Load Efficiency
UVLO Adjustable   
Enable
Light Load Efficiency
UVLO Adjustable   
Enable
Light Load Efficiency
UVLO Adjustable   
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Enable
Light Load Efficiency
UVLO Adjustable   
Enable
Light Load Efficiency
UVLO Adjustable   
Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable   
Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable   
Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable   
Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable   
Enable
Light Load Efficiency   
Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode   
90    93    93    93    90    90    90    100    100    90    90    90    90    90    90    90   
-40 to 150    -40 to 125    -40 to 125    -40 to 85    -40 to 150    -40 to 150    -40 to 150    -40 to 85    -40 to 125    -40 to 150    -40 to 150    -40 to 85    -40 to 85    -40 to 85    -40 to 150    -40 to 85   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
SO PowerPAD
VSON   
SOIC    SOIC    SOIC    SOIC    SOIC    SOIC    SOT-23-THIN    SOT-23-THIN    SO PowerPAD
SOIC   
SO PowerPAD    SO PowerPAD
VSON   
VSON    VSON    SO PowerPAD
VSON   
SO PowerPAD   
New! Interactive Design
Click to instantly view a schematic, charts, Bill of Materials, and Operating Values.

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


Footprint BOM Cost Efficiency


Preview design