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

View more

Parametrics Compare all products in Step-Down (Buck) Converter

 
Regulated Outputs (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Topology
Switching Frequency (Max) (kHz)
Switch Current Limit (Typ) (A)
Iq (Typ) (mA)
Duty Cycle (Max) (%)
Soft Start
Compensation
Special Features
Brand
Control Mode
Vref Accuracy (Typ) (%)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS54040A TPS54160A TPS54260 TPS54240 TPS54140A TPS54060A TPS54240-Q1 TPS57140-Q1 TPS54060-EP TPS5401 TPS54260-Q1 TPS54060-Q1 TPS57160-Q1
1     1     1     1     1     1     1     1     1     1     1     1     1    
3.5     3.5     3.5     3.5     3.5     3.5     3.5     3.5     3.5     3.5     3.5     3.5     3.5    
42     60     60     42     42     60     42     42     60     42     60     60     60    
0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8    
39     58     58     39     39     58     39     39     58     39     58     58     58    
0.5     1.5     2.5     2.5     1.5     0.5     2.5     1.5     0.5     0.5     2.5     0.5     1.5    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck     Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
2500     2500     2500     2500     2500     2500     2500     2500     2500     2500     2500     2500     2500    
0.6     1.8     3.5     3.5     1.8     0.6     3.5     1.8     0.6     0.94     3.5     0.6     1.8    
0.116     0.116     0.138     0.138     0.116     0.116     0.138     0.116     0.116     0.116     0.138     0.116     0.116    
98     98     98     98     98     98     98     98     98     98     98     98     98    
Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Fixed     Adjustable     Adjustable     Adjustable     Fixed     Adjustable     Adjustable    
External     External     External     External     External     External     External     External     External     External     External     External     External    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Adjustable UVLO
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking    
Adjustable UVLO
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Adjustable UVLO
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Adjustable UVLO
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
SWIFT     SWIFT     SWIFT     SWIFT     SWIFT     SWIFT         SWIFT     SWIFT          
Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode       Current Mode     Current Mode    
1     1     1     1     1     1     1     1       1.75     1     2     1    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Automotive     Automotive     HiRel Enhanced Product     Catalog     Automotive     Automotive     Automotive    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -55 to 125     -40 to 150     -40 to 125     -40 to 125     -40 to 125    
10MSOP-PowerPAD
10VSON    
10MSOP-PowerPAD
10VSON    
10MSOP-PowerPAD
10VSON    
10MSOP-PowerPAD
10VSON    
10MSOP-PowerPAD
10VSON    
10MSOP-PowerPAD
10VSON    
10MSOP-PowerPAD
10VSON    
10MSOP-PowerPAD
10VSON    
10MSOP-PowerPAD     10MSOP-PowerPAD     10MSOP-PowerPAD     10MSOP-PowerPAD
10VSON    
10MSOP-PowerPAD
10VSON    
1.02 | 1ku     1.58 | 1ku     1.86 | 1ku     1.49 | 1ku     1.26 | 1ku     1.27 | 1ku     1.74 | 1ku     1.72 | 1ku       0.85 | 1ku     2.18 | 1ku     1.49 | 1ku     1.85 | 1ku    

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WEBENCH® TPS54040A
    Min   Max   Range  
  Vin V    3.50 – 42.00V  
  Vout V    0.80 – 39.00V  
  Iout A    ≤ 0.5A  
  Ambient Temp °C    -40 – 150°C  
Footprint BOM Cost Efficiency
 
   
 
 
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