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TPS40345 ACTIVE 3-V to 20-V, 25-A, synchronous buck controller for cost-optimized applications This upgraded product offer a wider input range.

Product details

Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.591 Vout (Max) (V) 14.4 Iout (Max) (A) 20 Iq (Typ) (uA) 2500 Switching frequency (Min) (kHz) 600 Switching frequency (Max) (kHz) 600 Features Enable, Power Good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (C) -40 to 85 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.591 Vout (Max) (V) 14.4 Iout (Max) (A) 20 Iq (Typ) (uA) 2500 Switching frequency (Min) (kHz) 600 Switching frequency (Max) (kHz) 600 Features Enable, Power Good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (C) -40 to 85 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
VSON (DRC) 10 9 mm² 3 x 3
  • Input Operating Voltage Range: 4.5 V to 18 V
  • Up to 20-A Output Currents
  • Supports Pre-Biased Outputs
  • 0.5%, 591-mV Reference
  • Switching Frequency
    • TPS40192: 600 kHz
    • TPS40193: 300 kHz
  • Three Selectable Thermally Compensated Short-Circuit Protection Levels
  • Hiccup Restart from Faults
  • Internal 5-V Regulator
  • High-Side and Low-Side MOSFET ON-resistance (RDS(on)) Current Sensing
  • 10-Pin 3 mm × 3 mm SON Package
  • Internal 4-ms Soft-Start Time
  • Thermal Shutdown Protection at 145°C
  • Input Operating Voltage Range: 4.5 V to 18 V
  • Up to 20-A Output Currents
  • Supports Pre-Biased Outputs
  • 0.5%, 591-mV Reference
  • Switching Frequency
    • TPS40192: 600 kHz
    • TPS40193: 300 kHz
  • Three Selectable Thermally Compensated Short-Circuit Protection Levels
  • Hiccup Restart from Faults
  • Internal 5-V Regulator
  • High-Side and Low-Side MOSFET ON-resistance (RDS(on)) Current Sensing
  • 10-Pin 3 mm × 3 mm SON Package
  • Internal 4-ms Soft-Start Time
  • Thermal Shutdown Protection at 145°C

TPS40192 and TPS40193 are cost-optimized synchronous buck controllers that operate from 4.5 V to 18 V input. These controllers implement a voltage-mode control architecture with the switching frequency fixed at either 600 kHz (TPS40192) or 300 kHz (TPS40193). The higher switching frequency facilitates the use of smaller inductor and output capacitors, thereby providing a compact power-supply solution. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs.

Short circuit detection is done by sensing the voltage drop across the low-side MOSFET when it is on and comparing it with a user selected threshold of 100 mV, 200 mV or 280 mV. The threshold is set with a single external resistor connected from COMP to GND. This resistor is sensed at startup and the selected threshold is latched. Pulse-by-pulse limiting (to prevent current runaway) is provided by sensing the voltage across the high-side MOSFET when it is on and terminating the cycle when the voltage drop rises above a fixed threshold of 550 mV. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This behavior provides limited power dissipation in the event of a sustained fault.

TPS40192 and TPS40193 are cost-optimized synchronous buck controllers that operate from 4.5 V to 18 V input. These controllers implement a voltage-mode control architecture with the switching frequency fixed at either 600 kHz (TPS40192) or 300 kHz (TPS40193). The higher switching frequency facilitates the use of smaller inductor and output capacitors, thereby providing a compact power-supply solution. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs.

Short circuit detection is done by sensing the voltage drop across the low-side MOSFET when it is on and comparing it with a user selected threshold of 100 mV, 200 mV or 280 mV. The threshold is set with a single external resistor connected from COMP to GND. This resistor is sensed at startup and the selected threshold is latched. Pulse-by-pulse limiting (to prevent current runaway) is provided by sensing the voltage across the high-side MOSFET when it is on and terminating the cycle when the voltage drop rises above a fixed threshold of 550 mV. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This behavior provides limited power dissipation in the event of a sustained fault.

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Technical documentation

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Type Title Date
* Data sheet TPS4019x 4.5-V to 18-V Input, Voltage-Mode, Synchronous Buck Controller With Power Good datasheet (Rev. H) 23 May 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Selection guide DC/DC Buck Controller Solutions Selection Guide 06 Feb 2018
Application note Not All Jitter Is Created Equal (Rev. A) 04 Jul 2015
Application note Enabling Multiple TPS4019x Devices 29 Mar 2012
Application note 'C6472 12Vin Flexible Pwr Design Using DCDC Controllers and LDOs (8x C6472) 26 Mar 2010
Application note Power Reference Design for the 'C6472, 12V DCDC Controllers, and LDOs 26 Mar 2010
Application note TMS320C6472 5V Input Pwr Design, Integrated FET DC/DC Converters and Controllers 26 Mar 2010
User guide Using the TPS40192EVM-525 20 Nov 2009
Application note 5Vin DM643x Power using DC/DC Controllers and LDO 09 Oct 2008
User guide Using the TPS40192EVM-001 29 Jan 2007

Design & development

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

Simulation model

TPS40192 PSpice Transient Model

SLIM025.ZIP (88 KB) - PSpice Model
Simulation model

TPS40192 PSpice Average Model

SLVC169.ZIP (101 KB) - PSpice Model
Simulation model

TPS40192 TINA-TI Average Reference Design (Rev. A)

SLVC170A.ZIP (12 KB) - TINA-TI Reference Design
Simulation model

TPS40192 TINA-TI Average Spice Model

SLVM012.ZIP (3 KB) - TINA-TI Spice Model
Simulation model

TPS40192 TINA-TI Transient Spice Model

SLVM074.ZIP (95 KB) - TINA-TI Spice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Calculation tool

Type III Compensation Calculation Tool (Rev. E)

SLUC263E.ZIP (185 KB)
Reference designs

PMP5752 — 12V Input Sync Buck 0.9V@7A

This reference design generates a 0.9V/7.5A output from a 12V input using the TPS40192 synchronous buck controller. The low Rds and fast switching of the CSD17313Q2 and CSD17308Q3 provide over 83% efficiency.
Reference designs

PMP5760 — Synchronous buck converter 12V to 0.9V @7A

This reference design generates a 0.9V/7.4A output from a 12V input using the TPS40192 synchronous buck controller. The low Rds and fast switching of the CSD86330Q3D provides over 86% efficiency.
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VSON (DRC) 10 View options

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