TPS40305 3V to 20V Input, 25A Synchronous Buck Controller with FSS, 1.2MHz | TI.com

TPS40305 (ACTIVE) 3V to 20V Input, 25A Synchronous Buck Controller with FSS, 1.2MHz

 

Description

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.

Features

  • 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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WEBENCH® Designer TPS40305

  Min   Max Range
Vin  V 3.0 to 20.0V
Vout  V 0.6 to 18V
Iout  A ≤ 25A
Ambient Temp  °C -40 to 145°C

Parametrics

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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Number of Phases Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Control mode
TPS40305 Order now 3     20     0.6     17     25     1     1     1200     1200     2.5     Enable
Power Good
Pre-Bias Start-Up
Spread Spectrum
Synchronous Rectification    
85     -40 to 125     Catalog     VSON | 10     Controller     Voltage Mode    
TPS40303 Order now 3     20     0.6     18     25     1     1     300     300     2.5     Enable
Power Good
Pre-Bias Start-Up
Spread Spectrum
Synchronous Rectification    
90     -40 to 125     Catalog     VSON | 10     Controller     Voltage Mode    
TPS40304 Order now 3     20     0.6     18     25     1     1     600     600     2.5     Enable
Power Good
Pre-Bias Start-Up
Spread Spectrum
Synchronous Rectification    
90     -40 to 125     Catalog     VSON | 10     Controller     Voltage Mode    
TPS40304A Order now 3     20     0.6     18     25     1     1     600     600     2.5     Enable
Power Good
Pre-Bias Start-Up
Spread Spectrum
Synchronous Rectification    
90     -40 to 145     Catalog     VSON | 10     Controller     Voltage Mode