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TPS53125

ACTIVE

4.5-V to 24-V, 350 kHz synchronous dual-D-CAP2 buck controller

Product details

Vin (min) (V) 4.5 Vin (max) (V) 24 Vout (min) (V) 0.76 Vout (max) (V) 5.5 Iout (max) (A) 15 Iq (typ) (mA) 0.45 Switching frequency (min) (kHz) 350 Switching frequency (max) (kHz) 350 Features Enable, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (°C) -40 to 85 Regulated outputs (#) 2 Number of phases 1 Rating Catalog Control mode D-CAP2 Type Controller
Vin (min) (V) 4.5 Vin (max) (V) 24 Vout (min) (V) 0.76 Vout (max) (V) 5.5 Iout (max) (A) 15 Iq (typ) (mA) 0.45 Switching frequency (min) (kHz) 350 Switching frequency (max) (kHz) 350 Features Enable, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (°C) -40 to 85 Regulated outputs (#) 2 Number of phases 1 Rating Catalog Control mode D-CAP2 Type Controller
TSSOP (PW) 24 49.92 mm² 7.8 x 6.4 VQFN (RGE) 24 16 mm² 4 x 4
  • D-CAP2™ Mode Control
    • Fast Transient Response
    • No External Parts Required for Loop Compensation
    • Compatible With Ceramic Output Capacitors
  • High Initial Reference Accuracy (±1%)
  • Low Output Ripple
  • Wide Input Voltage Range: 4.5 V to 24 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Low-Side RDS(ON) Loss-Less Current Sensing
  • Adaptive Gate Drivers with Integrated Boost Diode
  • Adjustable Soft Start
  • Non-Sinking Pre-Biased Soft Start
  • 350-kHz Switching Frequency
  • Cycle-by-Cycle Over-Current Limiting Control
  • 30-mV to 300-mV OCP Threshold Voltage
  • Thermally Compensated OCP by 4000 ppm/°C at ITRIP
  • APPLICATIONS
    • Point-of-Load Regulation in Low Power Systems for
      Wide Range of Applications
      • Digital TV Power Supply
      • Networking Home Terminal
      • Digital Set-Top Box (STB)
      • DVD Player/Recorder
      • Gaming Consoles

  • D-CAP2™ Mode Control
    • Fast Transient Response
    • No External Parts Required for Loop Compensation
    • Compatible With Ceramic Output Capacitors
  • High Initial Reference Accuracy (±1%)
  • Low Output Ripple
  • Wide Input Voltage Range: 4.5 V to 24 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Low-Side RDS(ON) Loss-Less Current Sensing
  • Adaptive Gate Drivers with Integrated Boost Diode
  • Adjustable Soft Start
  • Non-Sinking Pre-Biased Soft Start
  • 350-kHz Switching Frequency
  • Cycle-by-Cycle Over-Current Limiting Control
  • 30-mV to 300-mV OCP Threshold Voltage
  • Thermally Compensated OCP by 4000 ppm/°C at ITRIP
  • APPLICATIONS
    • Point-of-Load Regulation in Low Power Systems for
      Wide Range of Applications
      • Digital TV Power Supply
      • Networking Home Terminal
      • Digital Set-Top Box (STB)
      • DVD Player/Recorder
      • Gaming Consoles

The TPS53125 is a dual, adaptive on-time D-CAP2™ mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of various end equipment’s power bus regulators with a low external component count and low standby consumption. The main control loop for the TPS53125 uses the D-CAP™ Mode topology which provides a very fast transient response with no external component.

The TPS53125 also has a proprietary circuit that enables the device to adapt not only low equivalent series resistance (ESR) output capacitors such as POSCAP/SP-CAP, but also ceramic capacitor. The part provides a convenient and efficient operation with conversion voltages from 4.5 V to 24 V and output voltage from 0.76 V to 5.5 V.

The TPS53125 is available in 24-pin RGE and PW packages, and is specified from –40°C to 85°C ambient temperature range.

The TPS53125 is a dual, adaptive on-time D-CAP2™ mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of various end equipment’s power bus regulators with a low external component count and low standby consumption. The main control loop for the TPS53125 uses the D-CAP™ Mode topology which provides a very fast transient response with no external component.

The TPS53125 also has a proprietary circuit that enables the device to adapt not only low equivalent series resistance (ESR) output capacitors such as POSCAP/SP-CAP, but also ceramic capacitor. The part provides a convenient and efficient operation with conversion voltages from 4.5 V to 24 V and output voltage from 0.76 V to 5.5 V.

The TPS53125 is available in 24-pin RGE and PW packages, and is specified from –40°C to 85°C ambient temperature range.

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Technical documentation

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Type Title Date
* Data sheet TPS53125 Dual Synchronous Step-Down Controller for Low Voltage Power Rails datasheet (Rev. C) PDF | HTML 27 Apr 2016
User guide TPS53127 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 25 Jan 2022
User guide TPS53128 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 25 Jan 2022
User guide TPS53125 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 10 Jan 2022
User guide TPS53129 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 10 Jan 2022
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018

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TSSOP (PW) 24 View options
VQFN (RGE) 24 View options

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