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TPS5124 Dual Channel Synchronous Step-Down PWM Controller


Package | PIN: DBT | 30
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $4.82
10-24 $4.33
25-99 $4.05
100-249 $3.63
250-499 $3.39
500-749 $2.95
750-999 $2.55
1000+ $2.50


  • High Efficiency – No Current Sense Resistor Required, RDS(on) Overcurrent Detection with Temperature Compensation
  • Adjustable Output Voltage Down to 0.9 V
  • Voltage-Mode PWM Control: Maximum 500-kHz Operation
  • 180° Out-of-Phase Control
  • Individual Standby and Soft-Start for Each Channel - Easy Power Sequencing
  • Overvoltage and Undervoltage Protection
  • Built-In Boot-Strap Diode
  • Built-In 5-V Linear Regulator
  • Accurate ± 1% 0.85-V Reference
    • Consumer Game Systems
    • DSP Applications
    • Digital Set-Top Box
    • VGA and Sound Cards

Texas Instruments  TPS5124DBT

The TPS5124 is dual independent high efficiency synchronous step-down controller. It supports a low-voltage/high-current power supply applications that use either a 5-V or 12-V bus voltage. Since both controllers of the TPS5124 operate 180 degree out-of-phase, the input current ripple is minimized resulting in a smaller input capacitance and reduced power supply cost.

The current protection circuit detects the drain-to-source voltage drop across the high-side and low-side power MOSFET while it is conducting. Also, the current protection circuit has a temperature coefficient to compensate for the RDS(on) variation of the MOSFET. This resistor-less current protection and built-in boost diode simplify the system design and reduces the external parts count. Other features such as undervoltage lockout, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability.