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TPS40305

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3-V to 20-V, 25-A, 1.2-MHz synchronous buck controller with FSS

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Data sheet

TPS40305

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 3 Vin (max) (V) 20 Iout (max) (A) 25 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 17 Features Enable, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification Iq (typ) (µA) 2500 Duty cycle (max) (%) 85 Number of phases 1
Vin (min) (V) 3 Vin (max) (V) 20 Iout (max) (A) 25 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 17 Features Enable, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification Iq (typ) (µA) 2500 Duty cycle (max) (%) 85 Number of phases 1
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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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) PDF | HTML 12 Mar 2018
User guide TPS40305 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 12 Jan 2022
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 SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC 22 Feb 2016
EVM User's guide CSD163CEVM-591 User's Guide 02 Mar 2010
EVM User's 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.

Evaluation board

TPS40305EVM-488 — 8-14V Vin, 1.8V Vout Sync Buck Controller Evaluation Module with NexFET™ Power MOSFETs

The TPS40305EVM-488 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.8-V output at up to 10A from a 12-V 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 TPS40305 high (...)

User guide: PDF | HTML
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Simulation model

TPS40305 TINA-TI Start-up Reference Design

SLIM228.TSC (692 KB) - TINA-TI Reference Design
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Simulation model

TPS40305 TINA-TI Steady State Reference Design

SLIM229.TSC (693 KB) - TINA-TI Reference Design
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Simulation model

TPS40305 TINA-TI Transient Spice Model

SLIM227.ZIP (73 KB) - TINA-TI Spice Model
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Simulation model

TPS40305 Unencrypted PSpice Transient Model Package (Rev. A)

SLIM116A.ZIP (91 KB) - PSpice Model
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Calculation tool

SLUC263 — Type III Compensation Calculation Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
TPS40007 — 2.25V-5.5V, 300 kHz, Synchronous Buck Controller, Source/ Sink, Prebias Operation TPS40009 — 2.25V-5.5V, 600 kHz, Synchronous Buck Controller, Source/ Sink, Prebias Operation TPS40021 — Enhanced Low Input (2.25V-5.5V) up to 1MHz Frequency, Sync. Buck Controller, source/sink TPS40040 — 2.25 to 5.5 V input, 300 kHz, synchronous buck controller with low pin count TPS40041 — 2.25 to 5.5 V input, 600 kHz, synchronous buck controller with low pin count TPS40055 — Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink TPS40057 — Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink with prebias TPS40075 — 4.5-V to 28-V, synchronous buck controller with voltage feed forward TPS40077 — 4.5-V to 28-V, synchronous buck controller with voltage feed forward in HTSSOP package TPS40101 — 4.5-V to 18-V, synchronous buck controller with advanced sequencing and output margining TPS40170 — 4.5 V to 60 V Wide-Input Synchronous PWM Buck Controller TPS40190 — 4.5-V to 15-V, 20-A synchronous buck controller TPS40192 — 4.5-V to 18-V, 20-A, 600-kHz synchronous buck controller with power good TPS40193 — 4.5-V to 18-V, 20-A, 300-kHz synchronous buck controller with power good TPS40195 — 4.5-V to 20-V, 20-A, synchronous buck controller with power good and synchronization TPS40200 — Wide Input Non-Synchronous Buck DC/DC Controller TPS40303 — 3-V to 20-V, 25-A, 300-kHz synchronous buck controller with FSS TPS40304 — 3-V to 20-V, 25-A, 600-kHz synchronous buck controller with FSS TPS40305 — 3-V to 20-V, 25-A, 1.2-MHz synchronous buck controller with FSS TPS40322 — Dual Output or Two-phase Synchronous Buck Controller TPS40400 — 3-V to 20-V, 30-A, synchronous buck controller with PMBus™, including Telemetry TPS40422 — Dual Output or Multiphase Synchronous Buck Controller with PMBus TPS5130 — 4.5-V to 28-V, triple synchronous buck controller with LDO controller
AC/DC & DC/DC converters (integrated FET)
TPS53311 — 2.9V to 6V Input, 3A Synchronous Step-Down Converter with Eco-Mode and Smooth PWM TPS53313 — 4.5-V to 16-V, 6-A synchronous buck converter with optimized light load efficiency TPS53316 — High-Efficiency, 5-A Step-Down Regulator with Integrated Switcher TPS56121 — 4.5-V to 14-V, 15-A synchronous SWIFT™ buck converter TPS56221 — 4.5-V to 14-V, 25-A synchronous SWIFT™ buck converter
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