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3V to 20V Input, 25A Synchronous Buck Controller with FSS, 300kHz

Availability: 5,894


Package | PIN: VSON (DRC) | 10
Temp: Q (-40 to 125)
Package qty | Carrier: 250 | SMALL T&R
Qty Price
1-99 $1.74
100-249 $1.52
250-999 $1.07
1,000+ $0.86


  • 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

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Texas Instruments  TPS40303DRCT

The TPS4030x is a family of cost-optimized synchronous buck controllers that operate from3-V to 20-V input. The controller implements a voltage-mode control architecture with input-voltagefeed-forward compensation that responds instantly to a change in input voltage. The switchingfrequency 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 EMIstandards.

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

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