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TPS40190

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4.5-V to 15-V, 20-A synchronous buck controller

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Data sheet

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TPS548B28 ACTIVE 2.7-V to 16-V input, 20-A synchronous step-down converter with remote sense and hiccup current limit Upgraded light-load efficiency, low IQ and extended positive operating temperature.

TPS40190

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 15 Vin (min) (V) 4.5 Vout (max) (V) 12.75 Vout (min) (V) 0.6 Control mode Voltage mode Features Enable, Pre-Bias Start-Up, Synchronous Rectification Duty cycle (max) (%) 85 Iq (typ) (A) 0.0025 Number of phases 1 Operating temperature range (°C) -40 to 85
Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 15 Vin (min) (V) 4.5 Vout (max) (V) 12.75 Vout (min) (V) 0.6 Control mode Voltage mode Features Enable, Pre-Bias Start-Up, Synchronous Rectification Duty cycle (max) (%) 85 Iq (typ) (A) 0.0025 Number of phases 1 Operating temperature range (°C) -40 to 85
VSON (DRC) 10 9 mm² (3 mm × 3 mm)
  • Input Operating Voltage Range: 4.5 V to 15 V
  • Reference 0.591 V ±1%
  • Voltage Mode Control
  • Internal 5-V Regulator For Internal Housekeeping, Driver Power and Light External Loads
  • Selectable Short-Circuit Protection Thresholds
  • Pre-Bias Ouput Safe
  • Fixed Switching Frequency of 300 kHz
  • Internal Soft Start
  • Small 3 mm × 3 mm, 10-Pin SON Package
  • Bootstrapped Drivers for N-Channel MOSFET
  • Adaptive Anti-Cross Conduction
  • Internal Bootstrap Diode
  • 1.2-A Drivers for Decreased Switching Loss
  • Input Operating Voltage Range: 4.5 V to 15 V
  • Reference 0.591 V ±1%
  • Voltage Mode Control
  • Internal 5-V Regulator For Internal Housekeeping, Driver Power and Light External Loads
  • Selectable Short-Circuit Protection Thresholds
  • Pre-Bias Ouput Safe
  • Fixed Switching Frequency of 300 kHz
  • Internal Soft Start
  • Small 3 mm × 3 mm, 10-Pin SON Package
  • Bootstrapped Drivers for N-Channel MOSFET
  • Adaptive Anti-Cross Conduction
  • Internal Bootstrap Diode
  • 1.2-A Drivers for Decreased Switching Loss

The TPS40190 is a cost-optimized synchronous buck controller that operates from 4.5 V to 15 V nominally, and implements a fixed frequency voltage mode power supply. The controller uses an adaptive anti-cross conduction scheme to prevent both the high-side and the rectifier MOSFET to be turned on at the same time, preventing shoot through current in the two MOSFETs.

The controller also provides a short circuit protection threshold that is user selectable between one of three values. The protection level is set with a single external resistor connected from COMP to GND. During start-up, the impedance connected to COMP is sensed, and the information is decoded to select one of the three thresholds. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This provides limited power dissipation in the event of a sustained fault.

The TPS40190 provides strong drivers to minimize switching losses in the power stage, reducing heat build up in the MOSFETs and allowing larger MOSFETs to be used without undue switching time penalty.

The TPS40190 is a cost-optimized synchronous buck controller that operates from 4.5 V to 15 V nominally, and implements a fixed frequency voltage mode power supply. The controller uses an adaptive anti-cross conduction scheme to prevent both the high-side and the rectifier MOSFET to be turned on at the same time, preventing shoot through current in the two MOSFETs.

The controller also provides a short circuit protection threshold that is user selectable between one of three values. The protection level is set with a single external resistor connected from COMP to GND. During start-up, the impedance connected to COMP is sensed, and the information is decoded to select one of the three thresholds. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This provides limited power dissipation in the event of a sustained fault.

The TPS40190 provides strong drivers to minimize switching losses in the power stage, reducing heat build up in the MOSFETs and allowing larger MOSFETs to be used without undue switching time penalty.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS40190 4.5-V to 15-V Input, Voltage-Mode, Synchronous Buck Controller datasheet (Rev. D) PDF | HTML Jun 6, 2019
User guide TPS40190 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML Jan 10, 2022
Selection guide Power Management Guide 2018 (Rev. R) Jun 25, 2018
Application note Enabling Multiple TPS4019x Devices Mar 29, 2012
More literature TPS40190DRC Test Report Feb 15, 2008

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

TPS40190 TINA-TI Average Reference Design (Rev. C)

SLVC180B (112 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

TPS40190 TINA-TI Average Spice Model (Rev. A)

SLVM015 (3 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

TPS40190 TINA-TI Transient Reference Design (Rev. B)

SLVM014 (150 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

TPS40190 TINA-TI Transient Spice Model (Rev. B)

SLVM016 (18 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

TPS40190 Unencrypted PSpice Average Model Package (Rev. A)

SLUM371A.ZIP (17 KB) - PSpice model
Supported products & hardware
Simulation model

TPS40190 Unencrypted PSpice Transient Model Package (Rev. D)

SLVC179D.ZIP (40 KB) - PSpice model
Supported products & hardware
Calculation tool

SLUC263 — Type III Compensation Calculation Tool

Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
VSON (DRC) 10 Ultra Librarian
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