Home Power management DC/DC switching regulators Step-down (buck) regulators Buck controllers (external switch)

TPS40304A

ACTIVE

3-V to 20-V, 25-A, 600 kHz synchronous buck controller with FSS and wide operating temp range

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) (mA) 2.5 Switching frequency (min) (kHz) 600 Switching frequency (max) (kHz) 600 EMI features Spread Spectrum Features Enable, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification Operating temperature range (°C) -40 to 145 Regulated outputs (#) 1 Number of phases 1 Rating Catalog Control mode Voltage mode Type Controller
Vin (min) (V) 3 Vin (max) (V) 20 Vout (min) (V) 0.6 Vout (max) (V) 18 Iout (max) (A) 25 Iq (typ) (mA) 2.5 Switching frequency (min) (kHz) 600 Switching frequency (max) (kHz) 600 EMI features Spread Spectrum Features Enable, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification Operating temperature range (°C) -40 to 145 Regulated outputs (#) 1 Number of phases 1 Rating Catalog Control mode Voltage mode Type Controller
VSON (DRC) 10 9 mm² 3 x 3
  • Input Voltage Range from 3 V to 20 V
  • Fixed 600-kHz Switching Frequency
  • High- and Low-Side FET RDS(on) Current Sensing
  • Programmable Thermally Compensated OCP Levels
  • Programmable Soft-Start
  • 591-mV, 1% Reference Voltage
  • Voltage Feed-Forward Compensation
  • Supports Pre-Biased Output
  • Frequency Spread Spectrum
  • Thermal Shutdown Protection at 145°C
  • 10-Pin 3 mm × 3 mm SON Package with Ground
    Connection to Thermal Pad
  • APPLICATIONS
    • POL Modules
    • Printer
    • Digital TV
    • Telecom

  • Input Voltage Range from 3 V to 20 V
  • Fixed 600-kHz Switching Frequency
  • High- and Low-Side FET RDS(on) Current Sensing
  • Programmable Thermally Compensated OCP Levels
  • Programmable Soft-Start
  • 591-mV, 1% Reference Voltage
  • Voltage Feed-Forward Compensation
  • Supports Pre-Biased Output
  • Frequency Spread Spectrum
  • Thermal Shutdown Protection at 145°C
  • 10-Pin 3 mm × 3 mm SON Package with Ground
    Connection to Thermal Pad
  • APPLICATIONS
    • POL Modules
    • Printer
    • Digital TV
    • Telecom

The TPS40304A is a cost-optimized synchronous buck controller that operates 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 input voltage change. The switching frequency is fixed at 600 kHz.

Frequency Spread Spectrum feature adds dither to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.

The TPS40304A offers design with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.

The OCP level is programmed by a single external resistor connected from LDRV pin to circuit ground. During initial power on, the TPS40304A 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 TPS40304A then enters a shutdown and restart cycle until the fault is removed.

The TPS40304A is a cost-optimized synchronous buck controller that operates 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 input voltage change. The switching frequency is fixed at 600 kHz.

Frequency Spread Spectrum feature adds dither to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.

The TPS40304A offers design with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.

The OCP level is programmed by a single external resistor connected from LDRV pin to circuit ground. During initial power on, the TPS40304A 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 TPS40304A then enters a shutdown and restart cycle until the fault is removed.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Similar functionality to the compared device
NEW TPS54KB20 ACTIVE 4-V to 16-V input, 25-A remote sense synchronous step-down converter Higher power density integrated FET converter solution for up to 25A output current

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Data sheet 3-V TO 20-V INPUT SYNCHRONOUS BUCK CONTROLLER. datasheet 27 Jan 2010

Design & development

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

Evaluation board

TPS40304EVM-353 — 8-14V Vin, 1.2V Vout Sync Buck Controller Evaluation Module with NexFET™ Power MOSFETs

The TPS40304EVM-353 evaluation module is a synchronous buck controller providing a 1.2-V output at up to 20 A from a nominal 12-V input bus. The EVM is designed to start-up from a single supply, and no additional bias voltage is required. The module uses our NexFET™ high performance MOSFETs (...)

User guide: PDF
Not available on TI.com
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 (...)
Package Pins Download
VSON (DRC) 10 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos