3.5V to 42V Input, 0.5 A Step Down Converter - TPS5401

TPS5401 (ACTIVE)

3.5V to 42V Input, 0.5 A Step Down Converter

Description

The TPS5401 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 supply current to 116 µA when outputting regulated voltage with no load. Using the enable pin, shutdown supply current is reduced to 1.3 µA when the enable pin is low.

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

A wide switching-frequency range allows efficiency and external component size optimization. Frequency foldback and thermal shutdown protect the part during an overload condition.

The TPS5401 is available in a 10-pin thermally enhanced MSOP PowerPAD package.

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™ Control Scheme
  • 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
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V ±3.5% Internal Voltage Reference
  • MSOP10 With PowerPAD™ Package
  • Supported by WEBENCH
  • For SWIFT™ Power Products Documentation, see
    http://www.ti.com/swift
  • APPLICATIONS
    • 12-V and 24-V Industrial and Commercial
      Low-Power Systems
    • E-Meters

All other trademarks are the property of their respective owners

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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$)
TPS5401
1    
3.5    
42    
0.8    
39    
0.5    
Buck    
2500    
0.94    
0.116    
98    
Adjustable    
External    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
SWIFT    
Current Mode    
1.75    
Catalog    
-40 to 150    
10MSOP-PowerPAD    
0.85 | 1ku    
New! Interactive Design
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WEBENCH® TPS5401
    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 150°C  
Footprint BOM Cost Efficiency
 
   
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