TPS54140 3.5V to 42V Input, 1.5A Step-Down Converter with Eco-Mode | TI.com

TPS54140 (ACTIVE) 3.5V to 42V Input, 1.5A Step-Down Converter with Eco-Mode

 

Recommended alternative parts

  • LMZ14201  -  Looking for a power module? Try the LMZ14201
  • TPS54140A  -  “A” version offers tighter Enable threshold and enhanced (2KV) HBM ESD – Recommended for new Designs
  • LMR23615  -   4 to 36V, 1.5A SIMPLE SWITCHER synchronous buck converter with high efficiency and high light load efficiency

Description

The TPS54140 device is a 42-V, 1.5-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 output-supply current to 116 µA. Using the enable pin, the shutdown supply current is reduced to 1.3 µA.

Undervoltage 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 and tracking. An open-drain power-good signal indicates the output is within 94% to 107% of the nominal voltage.

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

The TPS54140 device is available in a 10-pin thermally enhanced MSOP PowerPAD package.

Features

  • 3.5- to 42-V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High Efficiency at Light Loads with a
    Pulse Skipping Eco-mode™
  • 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 and Sequencing
  • UV and OV Power-Good Output
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V Internal Voltage Reference
  • MSOP10 Package With PowerPAD
  • Supported by WEBENCH® Software Tool
    (www.TI.com/WEBENCH)

New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPS54140

  Min   Max Range
Vin  V 3.5 to 42.0V
Vout  V 0.8 to 39V
Iout  A ≤ 1.5A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order 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) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
TPS54140 Order now 3.5     42     0.8     39     1.5     1     100     2500     0.116     Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable    
Current Mode     98     -40 to 150     Catalog     HVSSOP | 10     Converter     10HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 10)    
TPS54040A Order now 3.5     42     0.8     39     0.5     1     100     2500     0.116     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Tracking
UVLO Adjustable    
Current Mode     98     -40 to 125     Catalog     HVSSOP | 10
VSON | 10    
Converter     10HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 10)
10VSON: 9 mm2: 3 x 3 (VSON | 10)    
TPS54140A Order now 3.5     42     0.8     39     1.5     1     100     2500     0.116     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Tracking
UVLO Adjustable    
Current Mode     98     -40 to 125     Catalog     HVSSOP | 10
VSON | 10    
Converter     10HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 10)
10VSON: 9 mm2: 3 x 3 (VSON | 10)