1.5Vin to 18Vin, 25A SWIFT Synchronous Step-Down Converter With Full Differential Sense - TPS548B22


1.5Vin to 18Vin, 25A SWIFT Synchronous Step-Down Converter With Full Differential Sense



The TPS548B22 device is a compact single buck converter with adaptive on-time, D-CAP3 mode control. It is designed for high accuracy, high efficiency, fast transient response, ease-of-use, low external component count and space-conscious power systems.

This device features full differential sense, TI integrated FETs with a high-side on-resistance of 4.1 mΩ and a low-side on-resistance of 1.9 mΩ. The device also features accurate 0.5%, 0.9-V reference with an ambient temperature range between –40°C and 125°C. Competitive features include: very low external component count, accurate load regulation and line regulation and output voltage setpoint accuracy, auto-skip or FCCM mode operation, and internal soft-start control.

The TPS548B22 device is available in 5 mm × 7 mm, 40-pin, LQFN-CLIP (RVF) package (RoHs exempt).


  • Conversion Input Voltage Range (PVIN): 1.5 V to 18 V
  • Input Bias Voltage (VDD) Range: 4.5 V to 22 V
  • Output Voltage Range: 0.6 V to 5.5 V
  • Integrated, 4.1-mΩ and 1.9-mΩ Power MOSFETs with 25-A Continuous Output Current
  • Voltage Reference 0.6 V to 1.2 V in 50 mV Steps Using VSEL Pin
  • ±0.5%, 0.9-VREF Tolerance Range: –40°C to 125°C Junction Temperature
  • True Differential Remote Sense Amplifier
  • D-CAP3™ Control Loop to Support Large Bulk Capacitors and/or Small MLCCs Without External Compensation
  • Adaptive On-Time Control with 4 Selectable Frequency Settings: 425 kHz, 650 kHz, 875 kHz and 1.05 MHz
  • Temperature Compensated and with Programmable Positive and Negative Current Limit and OC Clamp
  • Choice of Hiccup or Latch-Off OVP or UVP
  • VDD UVLO External Adjustment by Precision EN Hysteresis
  • Prebias Startup Support
  • Eco-Mode and FCCM Selectable
  • Full Suite of Fault Protection and PGOOD
  • 5 mm × 7 mm × 1.5 mm, 40-Pin, Stack Clipped LQFN-CLIP Package

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Parametrics Compare all products in Buck Converter (Integrated Switch)

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Special Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Package Group
Adjustable Current Limit
Light Load Efficiency
Output Discharge
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
UVLO Adjustable   
-40 to 125   
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WEBENCH® Designer TPS548B22

  Min   Max Range
Vin  V 1.5 to 18.0V
Vout  V 0.6 to 5.5V
Iout  A ≤ 25A
Ambient Temp  °C -40 to 85°C

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