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UCD74120RVFT

High-Current, Synchronous Buck Power Stage

Packaging

Package | PIN: RVF | 40
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $8.76
10-24 $7.88
25-99 $7.36
100-249 $6.60
250-499 $6.16
500-749 $5.36
750-999 $4.64
1000+ $4.54

Features

  • Integrates Synchronous Buck Driver and NexFET™ Power MOSFETS for High Power Density and High Efficiency
  • 25-A Output Current Capability for DSP and ASIC
  • 4.7-V to 14-V Input Voltage Range
  • Operational up to 2 MHz Switching Frequency
  • Built-In High-Side Current Protection
  • DCR Current Sensing for Overcurrent Protection and Output Current Monitoring
  • Voltage Proportional to Load Current Monitor Output
  • Tri-state PWM Input for Power Stage Shutdown
  • UVLO Housekeeping Circuit
  • Integrated Thermal Shutdown
  • 40-Pin, 5 mm x 7 mm, PQFN PowerStack™ Package

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Texas Instruments  UCD74120RVFT

UCD74120 is a multi-chip module integrating a driver device and two NexFET power MOSFETsinto a thermally enhanced compact, 5 mm × 7 mm, QFN package. A 25-A output current capability makesthe device suitable for powering DSP and ASIC. The device is designed to complement digital oranalog PWM controllers. The PWM input of the driver device is 3-state compatible. Two drivercircuits provide high charge and discharge current for the high-side N-channel FET switch and thelow-side N-channel FET synchronous rectifier in a synchronous buck converter.

Output current is measured and monitored by a precision current sensing amplifier thatprocesses the voltage present across an external current sense element. The amplified signal isavailable for use by the PWM controller on the IMON pin. On-board comparators monitor the voltageacross the high-side switch and the voltage across the external current sense element to safeguardthe power stage from sudden high-current loads. Blanking delay is set for the high-side comparatorby a single resistor in order to avoid false reports coincident with switching edge noise. In theeven of a high-side fault or an overcurrent fault, the high-side FET is turned off and the faultflag (FLT) is asserted to alert the PWM controller.