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TPS51113

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4.5-V to 13.2-V, 300 kHz synchronous buck controller with high current gate driver

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Data sheet

TPS51113

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 4.5 Vin (max) (V) 13.2 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 8 Features Enable, Power good, Pre-Bias Start-Up Iq (typ) (µA) 6000 Duty cycle (max) (%) 72 Number of phases 1
Vin (min) (V) 4.5 Vin (max) (V) 13.2 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 8 Features Enable, Power good, Pre-Bias Start-Up Iq (typ) (µA) 6000 Duty cycle (max) (%) 72 Number of phases 1
VSON (DRC) 10 9 mm² 3 x 3
  • Flexible Power Rails: 5 V to 12 V
  • Reference: 800 mV ± 0.8%
  • Voltage Mode Control
  • Support Pre-biased Startup
  • Programmable Overcurrent Protection with Low-Side RDS(on) Current Sensing
  • Fixed 300-kHz (TPS51113) and 600-kHz (TPS51163) Switching Frequency
  • UV/OV Protections and Power Good Indicator
  • Internal Soft-start
  • Integrated High-Current Drivers Powered by VDD
  • 10-Pin 3 × 3 SON Package
  • APPLICATIONS
    • Server and Desktop Computer Subsystem Power Supplies (MCH, IOCH, PCI, Termination)
    • Distributed Power Supplies
    • General DC-DC Converters
  • Flexible Power Rails: 5 V to 12 V
  • Reference: 800 mV ± 0.8%
  • Voltage Mode Control
  • Support Pre-biased Startup
  • Programmable Overcurrent Protection with Low-Side RDS(on) Current Sensing
  • Fixed 300-kHz (TPS51113) and 600-kHz (TPS51163) Switching Frequency
  • UV/OV Protections and Power Good Indicator
  • Internal Soft-start
  • Integrated High-Current Drivers Powered by VDD
  • 10-Pin 3 × 3 SON Package
  • APPLICATIONS
    • Server and Desktop Computer Subsystem Power Supplies (MCH, IOCH, PCI, Termination)
    • Distributed Power Supplies
    • General DC-DC Converters

The TPS51113 and TPS51163 are cost-optimized, feature rich, single-channel synchronous-buck controllers that operates from a single 4.5-V to 13.2-V supply and can convert an input voltage as low as 1.5 V.

The controller implements voltage mode control with a fixed 300-kHz (TPS51113) and 600-kHz (TPS51163) switching frequency. The overcurrent (OC) protection employs the low-side RDS(on) current sensing and has user-programmable threshold. The OC threshold is set by the resistor from LDRV_OC pin to GND. The resistor value is read when the over-current programming circuit applies 10 µA of current to the LDRV_OC pin during the calibration phase of the start-up sequence.

The TPS51113/TPS51163 also supports output pre-biased startup.

The strong gate drivers with low deadtime allow for the utilization of larger MOSFETs to achieve higher efficiency. An adaptive anti-cross conduction scheme is used to prevent shoot-through between the power FETs.

The TPS51113 and TPS51163 are cost-optimized, feature rich, single-channel synchronous-buck controllers that operates from a single 4.5-V to 13.2-V supply and can convert an input voltage as low as 1.5 V.

The controller implements voltage mode control with a fixed 300-kHz (TPS51113) and 600-kHz (TPS51163) switching frequency. The overcurrent (OC) protection employs the low-side RDS(on) current sensing and has user-programmable threshold. The OC threshold is set by the resistor from LDRV_OC pin to GND. The resistor value is read when the over-current programming circuit applies 10 µA of current to the LDRV_OC pin during the calibration phase of the start-up sequence.

The TPS51113/TPS51163 also supports output pre-biased startup.

The strong gate drivers with low deadtime allow for the utilization of larger MOSFETs to achieve higher efficiency. An adaptive anti-cross conduction scheme is used to prevent shoot-through between the power FETs.

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Technical documentation

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Type Title Date
* Data sheet SINGLE SYNCHRONOUS BUCK CONTROLLER datasheet 12 Jul 2008
User guide TPS51113 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 01 Feb 2022

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

TPS51113 TINA-TI Start-up Reference Design (Rev. A)

SLIM231A.TSC (210 KB) - TINA-TI Reference Design
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Simulation model

TPS51113 TINA-TI Steady State Reference Design (Rev. A)

SLIM232A.TSC (210 KB) - TINA-TI Reference Design
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Simulation model

TPS51113 TINA-TI Transient Spice Model (Rev. A)

SLIM230A.ZIP (61 KB) - TINA-TI Spice Model
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Simulation model

TPS51113 Unencrypted PSpice Transient Model Package (Rev. A)

SLIM012A.ZIP (81 KB) - PSpice Model
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