Product details

Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 0.6 Vout (Max) (V) 18 Iout (Max) (A) 25 Iq (Typ) (uA) 2500 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 300 Features Enable, Power Good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification Operating temperature range (C) -40 to 125 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 0.6 Vout (Max) (V) 18 Iout (Max) (A) 25 Iq (Typ) (uA) 2500 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 300 Features Enable, Power Good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification Operating temperature range (C) -40 to 125 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
VSON (DRC) 10 9 mm² 3 x 3
  • Input Voltage Range From 3 V to 20 V
  • 300-kHz (TPS40303), 600-kHz (TPS40304), and 1.2-MHz (TPS40305) Switching Frequencies
  • High- and Low-Side FET RDS(on) Current Sensing
  • Programmable Thermally Compensated OCP Levels
  • Programmable Soft Start
  • 600-mV, 1% Reference Voltage
  • Voltage Feed-Forward Compensation
  • Supports Prebiased Output
  • Frequency Spread Spectrum
  • Thermal Shutdown Protection at 145°C
  • 10-Pin 3-mm × 3-mm VSON Package With Ground Connection to Thermal Pad
  • Create a Custom Design Using the TPS4030x With the WEBENCH® Power Designer
  • Input Voltage Range From 3 V to 20 V
  • 300-kHz (TPS40303), 600-kHz (TPS40304), and 1.2-MHz (TPS40305) Switching Frequencies
  • High- and Low-Side FET RDS(on) Current Sensing
  • Programmable Thermally Compensated OCP Levels
  • Programmable Soft Start
  • 600-mV, 1% Reference Voltage
  • Voltage Feed-Forward Compensation
  • Supports Prebiased Output
  • Frequency Spread Spectrum
  • Thermal Shutdown Protection at 145°C
  • 10-Pin 3-mm × 3-mm VSON Package With Ground Connection to Thermal Pad
  • Create a Custom Design Using the TPS4030x With the WEBENCH® Power Designer

The TPS4030x is a family of cost-optimized synchronous buck controllers that operate from 3-V to 20-V input. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to a change in input voltage. The switching frequency is fixed at 300 kHz, 600 kHz, or 1.2 MHz.

The frequency spread-spectrum (FSS) feature adds to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.

The TPS4030x offers design with a variety of user-programmable functions, including soft start, overcurrent protection (OCP) levels, and loop compensation.

OCP level may be programmed by a single external resistor connected from the LDRV pin to circuit ground. During initial power on, the TPS4030x enters a calibration cycle, measures the voltage at the LDRV pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. The TPS4030x then enters a shutdown and restart cycle until the fault is removed.

The TPS4030x is a family of cost-optimized synchronous buck controllers that operate from 3-V to 20-V input. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to a change in input voltage. The switching frequency is fixed at 300 kHz, 600 kHz, or 1.2 MHz.

The frequency spread-spectrum (FSS) feature adds to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.

The TPS4030x offers design with a variety of user-programmable functions, including soft start, overcurrent protection (OCP) levels, and loop compensation.

OCP level may be programmed by a single external resistor connected from the LDRV pin to circuit ground. During initial power on, the TPS4030x enters a calibration cycle, measures the voltage at the LDRV pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. The TPS4030x then enters a shutdown and restart cycle until the fault is removed.

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Pin-for-pin with same functionality to the compared device.
TPS40345 ACTIVE 3-V to 20-V, 25-A, synchronous buck controller for cost-optimized applications TPS40303 is 300-kHz with 1% Vref over temperature while TPS40345 is 600-kHz with 1.3% Vref over temperature.

Technical documentation

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Type Title Date
* Data sheet TPS4030x 3-V to 20-V Input, Voltage Mode, Synchronous Buck Controller datasheet (Rev. D) 12 Mar 2018
User guide TPS40305 Buck Controller Evaluation Module User's Guide (Rev. A) 12 Jan 2022
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Analog design journal Common mistakes made in controller designs for power converters 26 Mar 2018
Selection guide DC/DC Buck Controller Solutions Selection Guide 06 Feb 2018
Technical article Power Tips: Power sharing in USB Type-C applications 08 Jun 2016
Application note SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC 22 Feb 2016
User guide CSD163CEVM-591 User's Guide 02 Mar 2010
User guide TPS40304EVM-353 User's Guide 18 Feb 2010

Design & development

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

Simulation model

TPS40303 Unencrypted PSpice Transient Model Package (Rev. A)

SLIM115A.ZIP (92 KB) - PSpice Model
Simulation model

TPS40303 TINA-TI Transient Spice Model

SLIM233.ZIP (74 KB) - TINA-TI Spice Model
Simulation model

TPS40303 TINA-TI Start-up Reference Design

SLIM234.TSC (277 KB) - TINA-TI Reference Design
Simulation model

TPS40303 TINA-TI Steady State Reference Design

SLIM235.TSC (267 KB) - TINA-TI Reference Design
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

PMP20172 — 36W USB Dual Port USB Type-C™ PD Reference Design with Port Power Management DC/DC Charger

The PMP20172 reference design provides up to 36W on two USB Type-C outputs.  Input is a 17VDC bus.  The two outputs implement port power management.  If only one port is in use, it is allocated the full 36W.  If both ports are in use, power is split into 18W on each port.  (...)
Reference designs

PMP7208 — 5V In 33W Univ 4-Bit VID I/F AVS Pwr Supply for TCI6636K2H/6638K2H Reference Design

This reference design aims to supply the AVS core supply for Kepler DSPs like the C6638. The C66x series uses SmartReflex technology to enable the DSP to control its supply voltage. In order to meet this requirement, this design combines the TPS40303 Synchronous PWM Buck Controller with external (...)
Reference designs

PMP5754 — Power Reference Design for Positron Emission Tomography (PET) Scanner Processing and Control Board

A 12V-20V input, 95W, five (5) rail design for a PET Scanner control board with the TPS40303/304 PWM step-down controllers and Dual-Cool CSD16322Q5C NexFETs powering DDR core, DSP core, and analog circuitry like detectors, front-end amplifiers/filters and Analog-to-Digital Converters.
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VSON (DRC) 10 View options

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