3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode - TPS54040A

TPS54040A (ACTIVE)

3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode

 

Description

The TPS54040A device is a 42 V, 0.5 A, step down regulator with an integrated high side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low ripple pulse skip mode reduces the no load, regulated input supply current to 116 µA. Using the enable pin, shutdown supply current is nominally 1.3 µA when the enable pin is low.

Under voltage lockout is internally set at 2.5 V, but can be increased using the enable pin. The output voltage startup ramp is controlled by the slow start pin that can also be configured for sequencing or tracking. An open drain power good signal indicates when the output is within 94% to 107% of its nominal voltage.

A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition.

Features

  • 3.5 V to 42 V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High Efficiency at Light Loads with a Pulse
    Skipping Eco-mode™
  • Tighter Enable Threshold than TPS54040
    for More Accurate UVLO Voltage
  • Adjustable UVLO Voltage and Hysteresis
  • 116 µA Operating Quiescent Current
  • 1.3 µA Shutdown Current
  • 100 kHz to 2.5 MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start/Sequencing
  • UV and OV Power Good Output
  • 0.8-V Internal Voltage Reference
  • Available in MSOP-10 and VSON-10 Packages
  • Supported by WEBENCH® and SwitcherPro™
    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)
Special Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Approx. Price (US$)
TPS54040A TPS54140A TPS54240 TPS54340 TPS54340-Q1 TPS54341 TPS54540 TPS54540-Q1 TPS54541
3.5    3.5    3.5    4.5    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   
39    39    39    41    41    41    41.1    41.1    41   
0.5    1.5    2.5    3.5    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   
0.116    0.116    0.138    0.146    0.146    0.152    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
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
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 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 85    -40 to 125    -40 to 125    -40 to 85   
Catalog    Catalog    Catalog    Catalog    Automotive    Catalog    Catalog    Automotive    Catalog   
MSOP-PowerPAD
VSON   
MSOP-PowerPAD
VSON   
MSOP-PowerPAD
VSON   
SO PowerPAD    SO PowerPAD    WSON    SO PowerPAD    SO PowerPAD    WSON   
1.02 | 1ku    1.26 | 1ku    1.49 | 1ku    1.68 | 1ku    2.00 | 1ku    2.00 | 1ku    1.95 | 1ku    2.32 | 1ku    2.30 | 1ku   
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WEBENCH® Designer TPS54040A

  Min   Max Range
Vin  V 3.5 to 42.0V
Vout  V 0.8 to 39.0V
Iout  A ≤ 0.5A
Ambient Temp  °C -40 to 125°C


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