TPS40057 Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink with prebias |

This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink with prebias


Recommended alternative parts

  • LM25145  -  A next-generation solution that provides comparable functionality, smaller solution size and higher efficiency over a 6V to 42V operating voltage range.


The TPS4005x is a family of high-voltage, wide-input (8 V to 40 V), synchronous, step-down controllers. The TPS4005x family offers design flexibility with a variety of user-programmable functions, including soft-start, UVLO, operating frequency, voltage feed-forward, high-side current limit, and loop compensation.

The TPS4005x uses voltage feed-forward control techniques to provide good line regulation over the wide (4:1) input voltage range, and fast response to input line transients. Near-constant modulator gain with input variation eases loop compensation. The externally programmable current limit provides pulse-by-pulse current limit, as well as hiccup mode operation using an internal fault counter for longer duration overloads.


  • Operating Input Voltage 8 V to 40 V
  • Input Voltage Feed-Forward Compensation
  • < 1% Internal 0.7-V Reference
  • Programmable Fixed-Frequency up to 1-MHz
    Voltage Mode Controller
  • Internal Gate-Drive Outputs for High-Side
    and Synchronous N-Channel MOSFETs
  • 16-Pin PowerPAD™ Package (θJC = 2°C/W)
  • Thermal Shutdown
  • Externally Synchronizable
  • Programmable High-Side Sense Short-Circuit
  • Programmable Closed-Loop Soft-Start
  • TPS40054 Source Only
  • TPS40055 Source and Sink
  • TPS40057 Source and Sink With VO Prebias


Compare all products in Buck controllers (external switch) Email Download to Excel
Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Number of Phases Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Control mode
TPS40057 Order now 8     40     0.7     35     20     1     1     100     1000     1.5     Enable
Frequency Synchronization
Pre-Bias Start-Up
Synchronous Rectification    
85     -40 to 85     Catalog     HTSSOP | 16     Controller     Voltage Mode