3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode - TPS54040

TPS54040 (ACTIVE)

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

Recommended alternative parts

  • TPS54040A  -  “A” version offers tighter Enable threshold and enhanced (2KV) HBM ESD – Recommended for new Designs

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Description

The TPS54040 device is a 42V, 0.5A, 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 output supply current to 116µA. Using the enable pin, shutdown supply current is reduced to 1.3µA, when the enable pin is low.

Under voltage lockout is internally set at 2.5V, 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/tracking. An open drain power good signal indicates the output is within 93% 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.

The TPS54040 is available in 10 pin thermally enhanced MSOP PowerPAD™ package.

Features

  • 3.5V to 42V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High Efficiency at Light Loads with a
    Pulse Skipping Eco-mode
  • 116µA Operating Quiescent Current
  • 1.3µ Shutdown Current
  • 100kHz to 2.5MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start/Sequencing
  • UV and OV Power Good Output
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V Internal Voltage Reference
  • MSOP10 Package With PowerPAD
  • Supported by SwitcherPro Software Tool
    (http://focus.ti.com/docs/toolsw/folders/print/switcherpro.html)

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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
Preset Vout (V)
Vref Accuracy (Typ) (%)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS54040 LM2596 LM2576 TPS5430 LM2576HV TPS54340 LM2675 TPS54620 TPS50601-SP TPS54331 TPS62740 LM5010A-Q1 TPS62730
  1     1     1     1     1     1     1     1     1     1     1     1    
  4.5     4     5.5     4     4.5     6.5     4.5     3     3.5     2.2     6     1.9    
  40     40     36     60     42     40     17     6.3     28     5.5     75     3.9    
  3.3     3.3     1.23     3.3     0.8     1.23     0.8     0.785     0.8     1.8     2.5     2.1    
  37     37     31     37     41     37     15     5.5     25     3.3     70     2.1    
  3     3     3     3     3.5     1     6     6     3     0.3     1     0.1    
  Buck     Buck     Buck
Inverting Buck-Boost    
Buck     Buck
Inverting Buck-Boost    
Buck     Buck     Buck     Buck     Buck     Buck     Buck    
      500       2500     260     1600     1000     570       1000      
      4       5.5     1.55     8     11     5.8     0.6     1.25     0.41    
      3       0.146     2.5     0.6     5     0.11     0.0003     0.65     0.025    
      87       98     95     98     85     90     100     99     100    
      Fixed       Fixed     Fixed     Adjustable     Adjustable     Adjustable     Fixed     Adjustable     Fixed    
  Internal     Internal     Internal     Internal     External     Internal     External     External     External     Internal     Not Needed     Internal    
      Enable       Enable
Frequency Synchronization
Light Load Efficiency
Adjustable UVLO    
Enable     Enable
Frequency Synchronization
Power Good
Tracking
Synchronous Rectification    
Enable
Frequency Synchronization
Power Good
Tracking    
Enable
Light Load Efficiency
Adjustable UVLO    
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification    
Enable     Enable
Light Load Efficiency
Synchronous Rectification    
  SIMPLE SWITCHER     SIMPLE SWITCHER     SWIFT     SIMPLE SWITCHER       SIMPLE SWITCHER     SWIFT         DCS-Control       DCS-Control    
  Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Current Mode     Voltage Mode     Current Mode     Current Mode     Current Mode       Constant on-time (COT)      
                        2.1    
      1.5       1     1.5     1     1.258     3.5     2.5     2     1.5    
  Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Space     Catalog     Catalog     Automotive     Catalog    
  -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 150     -55 to 125
25 Only    
-40 to 150     -40 to 85     -40 to 125
-40 to 150    
-40 to 85    
  5DDPAK/TO-263
5TO-220    
5DDPAK/TO-263
5TO-220    
8SO PowerPAD     5DDPAK/TO-263
5TO-220    
8SO PowerPAD     16WSON
8PDIP
8SOIC    
14VQFN     20CFP     8SO PowerPAD
8SOIC    
12WSON     14HTSSOP     6SON    
  1.80 | 1ku     1.19 | 1ku     1.85 | 1ku     2.30 | 1ku     1.68 | 1ku     1.60 | 1ku     2.50 | 1ku       0.60 | 1ku     1.15 | 1ku     1.75 | 1ku     0.65 | 1ku    

Other qualified versions of TPS54040

Version Part Number Definition
Automotive TPS54040-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
WEBENCH® TPS54040
    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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