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)
Performance 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    
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 Synch
Light Load Efficiency Mode
Power Good
Tracking
UVLO Adjustable    
Enable
Frequency Synch
Light Load Efficiency Mode
Power Good
Tracking
UVLO Adjustable    
Enable
Frequency Synch
Light Load Efficiency Mode
Power Good
Tracking
UVLO Adjustable    
Enable
Frequency Synch
Light Load Efficiency Mode
UVLO Adjustable    
Enable
Frequency Synch
Light Load Efficiency Mode
UVLO Adjustable    
Enable
Frequency Synch
Light Load Efficiency Mode
Power Good
Tracking
UVLO Adjustable    
Enable
Frequency Synch
Light Load Efficiency Mode
UVLO Adjustable    
Enable
Frequency Synch
Light Load Efficiency Mode
UVLO Adjustable    
Enable
Frequency Synch
Light Load Efficiency Mode
Power Good
Tracking
UVLO Adjustable    
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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