4.5 to 42V Input 3.5A Step-Down DC-DC Converter With Soft-Start and Eco-mode™ - TPS54341

TPS54341 (ACTIVE)

4.5 to 42V Input 3.5A Step-Down DC-DC Converter With Soft-Start and Eco-mode™

 

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Description

The TPS54341 device is a 42-V, 3.5-A step-down regulator with an integrated high-side MOSFET. The device survives load-dump pulses up to 45 V per ISO 7637. Current mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no-load supply current to 152 µA. Shutdown supply current is reduced to 2 µA when the enable pin is pulled low.

Undervoltage lockout is internally set at 4.3 V but can increase using an external resistor divider at the enable pin. The output voltage startup ramp is controlled by the soft start pin that can also be configured for sequencing/tracking. An open-drain power-good signal indicates the output is within 93% to 106% of the nominal voltage.

A wide adjustable switching-frequency range allows for optimization of either efficiency or external component size. Cycle-by-cycle current limit, frequency foldback and thermal shutdown protects internal and external components during an overload condition.

The TPS54341 device is available in a 10-pin 4-mm × 4-mm WSON package.

Features

  • High Efficiency at Light Loads with Pulse Skipping Eco-mode™
  • 87-mΩ High-Side MOSFET
  • 152-µA Operating Quiescent Current and 2-µA Shutdown Current
  • 100-kHz to 2.5-MHz Adjustable Switching Frequency
  • Synchronizes to External Clock
  • Low Dropout at Light Loads with Integrated BOOT Recharge FET
  • Adjustable UVLO Voltage and Hysteresis
  • UV and OV Power-Good Output
  • Adjustable Soft-Start and Sequencing
  • 0.8-V 1% Internal Voltage Reference
  • 10-Pin WSON with Thermal Pad Package
  • –40°C to 150°C TJ Operating Range
  • Supported by WEBENCH® Software Tool

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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
TPS54341 TPS54040A TPS54140A TPS54240 TPS54340 TPS54340-Q1 TPS54540 TPS54540-Q1 TPS54541
4.5    3.5    3.5    3.5    4.5    4.5    4.5    4.5    4.5   
42    42    42    42    42    42    42    42    42   
0.8    0.8    0.8    0.8    0.8    0.8    0.8    0.8    0.8   
41    39    39    39    41    41    41.1    41.1    41   
3.5    0.5    1.5    2.5    3.5    3.5    5    5    5   
1    1    1    1    1    1    1    1    1   
100    100    100    100    100    100    100    100    100   
2500    2500    2500    2500    2500    2500    2500    2500    2500   
0.152    0.116    0.116    0.138    0.146    0.146    0.146    0.146    0.152   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable   
Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode   
98    98    98    98    98    98    98    98    98   
-40 to 85    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 85   
Catalog    Catalog    Catalog    Catalog    Catalog    Automotive    Catalog    Automotive    Catalog   
WSON    MSOP-PowerPAD
VSON   
MSOP-PowerPAD
VSON   
MSOP-PowerPAD
VSON   
SO PowerPAD    SO PowerPAD    SO PowerPAD    SO PowerPAD    WSON   
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WEBENCH® Designer TPS54341

  Min   Max Range
Vin  V 4.5 to 42.0V
Vout  V 0.8 to 41.0V
Iout  A ≤ 3.5A
Ambient Temp  °C -40 to 85°C


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