TPS563231 4.5-V to 17-V input, 3-A synchronous step-down voltage regulator |

TPS563231 (ACTIVE) 4.5-V to 17-V input, 3-A synchronous step-down voltage regulator



The TPS563231 is a simple, easy-to-use, 3-A synchronous step-down converter in SOT563 package.

The device is optimized to operate with minimum external component counts and also optimized to achieve low standby current.

These switch mode power supply (SMPS) devices employ D-CAP3 mode control providing a fast transient response and supporting both low-equivalent series resistance (ESR) output capacitors such as specialty polymer and ultra-low ESR ceramic capacitors with no external compensation components.

During light load operation, TPS563231 operates in pulse skip mode (PSM), which maintains high efficiency. The TPS563231 is available in a 6-pin 1.6-mm × 1.6-mm SOT563 (DRL) package, and specified from a –40°C to 125°C junction temperature.


  • 3-A Converter integrated 95-mΩ and 55-mΩ FETs
  • D-CAP3™ mode control with fast transient response
  • Input voltage range: 4.5 V to 17 V
  • Output voltage range: 0.6 V to 7 V
  • Pulse skip mode
  • 600-kHz Switching frequency
  • Low shutdown current Less than 12 µA
  • 2% Feedback voltage accuracy (25ºC)
  • Startup from pre-biased output voltage
  • Cycle-by-cycle over current limit
  • Hiccup-mode over current protection
  • Non-Latch UVP and TSD Protections
  • 6-Pin SOT563 package

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WEBENCH® Designer TPS563231

  Min   Max Range
Vin  V 4.5 to 17.0V
Vout  V 0.6 to 7V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 85°C


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Part number Order 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) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
TPS563231 Order now 4.5     17     0.6     7     3     1     600     600     0.22     Enable
Light Load Efficiency
Over Current Protection
Pre-Bias Start-Up
Synchronous Rectification
UVLO Fixed
Soft Start Fixed    
D-CAP3     87     -40 to 125     Catalog     SOT-5X3 | 6     Converter     6SOT-5X3: 2 mm2: 1.2 x 1.6 (SOT-5X3 | 6)