42 V, 5 A, Step-Down DC-DC Converter with Eco-Mode - TPS54540

TPS54540 (ACTIVE)

42 V, 5 A, Step-Down DC-DC Converter with Eco-Mode

 

Description

The TPS54540 is a 42 V, 5 A, step down regulator with an integrated high side MOSFET. The device survives load dump pulses up to 45V 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 146 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 be increased using the enable pin. The output voltage start up ramp is internally controlled to provide a controlled start up and eliminate overshoot.

A wide switching frequency range allows either efficiency or external component size to be optimized. Output current is limited cycle-by-cycle. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.

The TPS54540 is available in an 8-terminal thermally enhanced HSOP PowerPAD™ package.

Features

  • High Efficiency at Light Loads with Pulse Skipping Eco-mode™
  • 92-mΩ High-Side MOSFET
  • 146 µA Operating Quiescent Current and
    2 µA Shutdown Current
  • 100 kHz to 2.5 MHz Fixed Switching Frequency
  • Synchronizes to External Clock
  • Low Dropout at Light Loads with Integrated BOOT Recharge FET
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8 V 1% Internal Voltage Reference
  • 8-Terminal HSOP with PowerPAD™ Package
  • –40°C to 150°C TJ Operating Range
  • Create a Custom Design using the TPS54540 with the WEBENCH® Power Designer

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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
TPS54540 LM43603 LM73605 LM73606 LMR14050 LMS3655 TPS54040A TPS54140A TPS54240 TPS54340 TPS54341 TPS54541
4.5    3.5    3.5    3.5    4    3.5    3.5    3.5    3.5    4.5    4.5    4.5   
42    36    36    36    40    42    42    42    42    42    42    42   
0.8    1    1    1    1    1    0.8    0.8    0.8    0.8    0.8    0.8   
41.1    28    34    34    36    15    39    39    39    41    41    41   
5    3    5    6    5    5.5    0.5    1.5    2.5    3.5    3.5    5   
1    1    1    1    1    1    1    1    1    1    1    1   
100    200    350    350    200    250    100    100    100    100    100    100   
2500    2200    2200    2200    2500    500    2500    2500    2500    2500    2500    2500   
0.146    0.027    0.015    0.015    0.04    0.015    0.116    0.116    0.138    0.146    0.152    0.152   
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Fixed
Wettable Flanks Package   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Fixed
Wettable Flanks Package   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Tracking
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification   
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
Power Good
Tracking
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    Current Mode    Current Mode    Current Mode   
98    99    96    95    98    98    98    98    98    98    98    98   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 85    -40 to 85   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
SO PowerPAD    HTSSOP
SON   
WQFN    WQFN    SO PowerPAD    VQFN-HR    MSOP-PowerPAD
VSON   
MSOP-PowerPAD
VSON   
MSOP-PowerPAD
VSON   
SO PowerPAD    WSON    WSON   

Other qualified versions of TPS54540

Version Part Number Definition
Automotive TPS54540-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
New! Interactive Design
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WEBENCH® Designer TPS54540

  Min   Max Range
Vin  V 4.5 to 42.0V
Vout  V 0.8 to 41.0V
Iout  A ≤ 5A
Ambient Temp  °C -40 to 150°C


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