TPS40304A 3V to 20V Input, 25A Synchronous Buck Controller with FSS, 600kHz | TI.com

TPS40304A (ACTIVE) 3V to 20V Input, 25A Synchronous Buck Controller with FSS, 600kHz

3V to 20V Input, 25A Synchronous Buck Controller with FSS, 600kHz - TPS40304A
Datasheet
 

Description

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.

Features

  • 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

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
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    
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    
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