Product details

Vin (Min) (V) 4.5 Vin (Max) (V) 20 Vout (Min) (V) 0.591 Vout (Max) (V) 17 Iout (Max) (A) 20 Iq (Typ) (uA) 4000 Switching frequency (Min) (kHz) 100 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) 20 Vout (Min) (V) 0.591 Vout (Max) (V) 17 Iout (Max) (A) 20 Iq (Typ) (uA) 4000 Switching frequency (Min) (kHz) 100 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
TSSOP (PW) 16 22 mm² 4.4 x 5 VQFN (RGY) 16 14 mm² 4 x 3.5
  • Input Operating Voltage Range: 4.5 V to 20 V
  • Output Voltage as Low as 0.591 V ±0.5%
  • 180° Bi-Directional Out-of-Phase Synchronization
  • Internal 5-V Regulator
  • High and Low MOSFET Sense Overcurrent
  • 100-kHz to 600-kHz Switching Frequency
  • Enable and Power Good
  • Programmable UVLO and Hysteresis
  • Thermal Shutdown at 150°C
  • Selectable Soft Start
  • Prebias Output Safe
  • Input Operating Voltage Range: 4.5 V to 20 V
  • Output Voltage as Low as 0.591 V ±0.5%
  • 180° Bi-Directional Out-of-Phase Synchronization
  • Internal 5-V Regulator
  • High and Low MOSFET Sense Overcurrent
  • 100-kHz to 600-kHz Switching Frequency
  • Enable and Power Good
  • Programmable UVLO and Hysteresis
  • Thermal Shutdown at 150°C
  • Selectable Soft Start
  • Prebias Output Safe

The TPS40195 is a flexible synchronous buck controller that operates from a nominal 4.5-V to 20-V supply. This controller implements voltage mode control with the switching frequency adjustable from 100 kHz to 600 kHz. Flexible features found on this device include selectable soft-start time, programmable short-circuit limit, programmable undervoltage lockout (UVLO) and synchronization capability. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Overcurrent detection is done by sensing the voltage drop across the low-side MOSFET when it is on, and comparing it with a user-programmable threshold.

The threshold is set with a single external resistor connected from ILIM to GND. 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 provides limited power dissipation in the event of a sustained fault. Synchronization on this device is bi-directional. Devices can be synchronized 180° out of phase to a chosen master TPS40195 running at a fixed 250 kHz or 500 kHz, or can be synchronized to an outside clock source anywhere in the 100 kHz to 600 kHz range.

The TPS40195 is a flexible synchronous buck controller that operates from a nominal 4.5-V to 20-V supply. This controller implements voltage mode control with the switching frequency adjustable from 100 kHz to 600 kHz. Flexible features found on this device include selectable soft-start time, programmable short-circuit limit, programmable undervoltage lockout (UVLO) and synchronization capability. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Overcurrent detection is done by sensing the voltage drop across the low-side MOSFET when it is on, and comparing it with a user-programmable threshold.

The threshold is set with a single external resistor connected from ILIM to GND. 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 provides limited power dissipation in the event of a sustained fault. Synchronization on this device is bi-directional. Devices can be synchronized 180° out of phase to a chosen master TPS40195 running at a fixed 250 kHz or 500 kHz, or can be synchronized to an outside clock source anywhere in the 100 kHz to 600 kHz range.

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Technical documentation

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Type Title Date
* Data sheet TPS40195 4.5-V to 20-V Synchronous Buck Controller With Synchronization and Power Good datasheet (Rev. F) 07 Jun 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Options abound to power your LEDs! 21 Dec 2013
Application note Enabling Multiple TPS4019x Devices 29 Mar 2012
User guide Using the TPS40195EVM (Rev. A) 10 Jul 2008
More literature TPS40195RGY Test Report 15 Feb 2008

Design & development

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

Evaluation board

TPS40195EVM-001 — TPS40195 20V Input, 3.3V Output, 20A Evaluation Module

The TPS40195EVM evaluation module (EVM) is a synchronous buck converter providing a fixed 3.3V output at up to 20A from a 12V input bus. The EVM is designed to start up from a single supply, so no additional bias voltage is required for start up. The module uses the TPS40195 Mid-Voltage Synchronous (...)
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Simulation model

TPS40195 Unencrypted PSpice Average and Transient Model Package (Rev. B)

SLVC181B.ZIP (391 KB) - PSpice Model
Simulation model

TPS40195 TINA-TI Transient Reference Design (Rev. B)

SLVC182B.ZIP (331 KB) - TINA-TI Reference Design
Simulation model

TPS40195 TINA-TI Average Reference Design

SLVM017.ZIP (314 KB) - TINA-TI Reference Design
Simulation model

TPS40195 TINA-TI Transient Spice Model

SLVM018.ZIP (22 KB) - TINA-TI Spice Model
Simulation model

TPS40195 TINA-TI Average Spice Model

SLVM019.ZIP (3 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

PMP6692 — LED driver 3.2V@0.5A

This synchronous LED driver regulates the current to 0.5A in a single LED. The circuit is optimized to operate at 12V input and delivers an efficiency of 90%. Targeted application is landscape lighting and solar.
Package Pins Download
TSSOP (PW) 16 View options
VQFN (RGY) 16 View options

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