TPS40400 3.0V - 20V, 30A, Synchronous Buck Controller with PMBus™, including Telemetry |

TPS40400 (供給中) 3.0V - 20V, 30A, Synchronous Buck Controller with PMBus™, including Telemetry

3.0V - 20V, 30A, Synchronous Buck Controller with PMBus™, including Telemetry - TPS40400


The TPS40400 is a cost-optimized flexible synchronous buck controller that operates from a nominal 3-V to 20-V supply. This controller is an analog PWM controller that allows programming and monitoring through the PMBus™ interface. Flexible features found on this device include programmable soft-start time, programmable short circuit limit, and programmable undervoltage lockout (UVLO).

An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Gate drive voltage is 6 V to better enhance the power FETs for reduced losses. Short circuit detection occurs by sensing the voltage drop across the inductor or across a resistor placed in series with the inductor. A PMBus programmable threshold is compared to this voltage and is used to detect overcurrent. When the overcurrent threshold is reached, a pulse by pulse current limit scheme is used to limit the current to acceptable levels. If the overcurrent condition persists for more than 7 clock cycles of the converter, a fault condition is declared and the converter shuts down and goes into either a hiccup restart mode or latches off. The behavior can be selected through the PMBus interface. Other PMBus interface features include programmable operating frequency, soft-start time, overvoltage and undervoltage thresholds and the response to those events, output voltage change including margining as well as status monitoring.


  • Input Operating Voltage Range: 3 V to 20 V
  • PMBus Enabled Analog Controller
  • Reference 600 mV ± 1%
  • Remote Voltage Sense Amplifier
  • Internal 6-V Regulator and 6-V Gate Drive
  • Programmable Overcurrent Protection
  • Inductor Resistance or Series Resistance Used for Current Sensing
  • Programmable Switching Frequency: 200 kHz to 2 MHz
  • Powergood Indicator
  • Thermal Shutdown
  • Programmable Soft-Start
  • Internal Bootstrap Diode
  • Prebias Output Safe
  • 24-Pin QFN Package

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WEBENCH® Designer TPS40400

  最小   最大 範囲
入力電圧  V 3.0 to 20.0V
出力電圧  V 0.6 to 5V
負荷電流  A ≤ 30A
周囲温度  °C -40 to 150°C


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Part number オーダー・オプション 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
TPS40400 ご注文 3     20     0.6     5     30     1     1     200     2000     6     Dynamic Voltage Scaling
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
90     -40 to 125     Catalog     VQFN | 24     Controller     Voltage Mode    
TPS40422 ご注文 4.5     20     0.6     5.6     60     2     2     200     1000     18     Dynamic Voltage Scaling
Frequency Synchronization
Multiple Outputs
Phase Interleaving
Remote Sense    
90     -40 to 125     Catalog     VQFN | 40
WQFN | 40    
Controller     Voltage Mode