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4.5V to 17V Input, Current Mode, 4A Synchronous SWIFT™ Step-Down Converter

Availability: 6,760


Package | PIN: VQFN-HR (RNV) | 18
Temp: S (-40 to 150)
Package qty | Carrier: 3,000 | LARGE T&R
Custom reel may be available
Qty Price
1-99 $1.76
100-249 $1.54
250-999 $1.08
1,000+ $0.87


  • Small 3.5-mm × 3.5-mm HotRod™ QFN Package
  • Integrated 14.1-mΩ and 6.1-mΩ MOSFETs
  • Peak Current Mode Control With Fast Transient Response
  • 200-kHz to 1.6-MHz Fixed Switching Frequency
  • Synchronizes to External Clock
  • 0.6-V Voltage Reference ±0.85% Over Temperature
  • 0.6-V to 12-V Output Voltage Range
  • Hiccup Current Limit
  • Safe Start-Up into Pre-Biased Output Voltage
  • Adjustable Soft Start and Power Sequencing
  • Adjustable Input Undervoltage Lockout
  • 3-µA Shutdown Current
  • Power Good Output Monitor for Undervoltage and Overvoltage
  • Output Overvoltage Protection
  • Non-latch Thermal Shutdown Protection
  • –40°C to 150°C Operating Junction Temperature
  • Create a Custom Design Using the TPS54424 With the WEBENCH® Power Designer

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Texas Instruments  TPS54424RNVR

The TPS54424 is afull-featured 17-V (19-V maximum), 4-Asynchronous step-down DC/DC converter in a 3.5 mm × 3.5 mm HotRod™ QFN package.

The device is optimized for small solution size through high efficiency and integratingthe high-side and low-side MOSFETs. Further space savings are achieved through peak current modecontrol, which reduces component count, and by selecting a high switching frequency, reducing theinductor footprint.

The peak current mode control simplifies the loop compensation and provides fasttransient response. Cycle-by-cycle peak current limiting on the high-side and low-side sourcingcurrent limit protects the device in overload situations. Hiccup limits MOSFET power dissipation ifa short circuit or over loading fault persists.

A power good supervisor circuit monitors the regulator output. The PGOOD pin is anopen-drain output and goes high impedance when the output voltage is in regulation. An internaldeglitch time prevents the PGOOD pin from pulling low unless a fault has occurred.

A dedicated EN pin can be used to control the regulator on/off and adjust the inputundervoltage lockout. The output voltage start-up ramp is controlled by the SS/TRK pin, whichallows operation as either a standalone power supply or in tracking situations.