Home Power management DC/DC switching regulators Step-down (buck) regulators Buck controllers (external switch)

TPS51217

ACTIVE

3-V to 28-V, 20-A, synchronous D-CAP buck controller for notebook power

Product details

Vin (min) (V) 3 Vin (max) (V) 28 Vout (min) (V) 0.6 Vout (max) (V) 2.6 Iout (max) (A) 20 Iq (typ) (mA) 0.32 Switching frequency (min) (kHz) 312 Switching frequency (max) (kHz) 368 Features Dynamic Voltage Scaling, Enable, Light Load Efficiency, Power good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (°C) -40 to 85 Regulated outputs (#) 1 Number of phases 1 Rating Catalog Control mode D-CAP Type Controller
Vin (min) (V) 3 Vin (max) (V) 28 Vout (min) (V) 0.6 Vout (max) (V) 2.6 Iout (max) (A) 20 Iq (typ) (mA) 0.32 Switching frequency (min) (kHz) 312 Switching frequency (max) (kHz) 368 Features Dynamic Voltage Scaling, Enable, Light Load Efficiency, Power good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (°C) -40 to 85 Regulated outputs (#) 1 Number of phases 1 Rating Catalog Control mode D-CAP Type Controller
WSON (DSC) 10 9 mm² 3 x 3
  • Wide Input Voltage Range: 3 V to 28 V
  • Output Voltage Range: 0.6 V to 2.6 V
  • Wide Output Load Range: 0 to 20A+
  • Built-in 0.5% 0.6 V Reference
  • D-CAP Mode with 100-ns Load Step Response
  • Adaptive On Time Control Architecture with Fixed 340kHz Operation
  • Dynamic Output Voltage Change Capability
  • 4700 ppm/°C RDS(on) Current Sensing
  • Internal 0.9-ms Voltage Servo Softstart
  • Pre-Charged Start-up Capability
  • Built-in Output Discharge
  • Power Good Output
  • Integrated Boost Switch
  • Built-in OVP/UVP/OCP
  • Thermal Shutdown (Non-latch)
  • SON-10 (DSC) Package
  • Wide Input Voltage Range: 3 V to 28 V
  • Output Voltage Range: 0.6 V to 2.6 V
  • Wide Output Load Range: 0 to 20A+
  • Built-in 0.5% 0.6 V Reference
  • D-CAP Mode with 100-ns Load Step Response
  • Adaptive On Time Control Architecture with Fixed 340kHz Operation
  • Dynamic Output Voltage Change Capability
  • 4700 ppm/°C RDS(on) Current Sensing
  • Internal 0.9-ms Voltage Servo Softstart
  • Pre-Charged Start-up Capability
  • Built-in Output Discharge
  • Power Good Output
  • Integrated Boost Switch
  • Built-in OVP/UVP/OCP
  • Thermal Shutdown (Non-latch)
  • SON-10 (DSC) Package

The TPS51217 is a small-sized single buck controller with adaptive on-time D-CAP™ mode. The device is suitable for low output voltage, high current, PC system power rail and similar point-of-load (POL) power supply in digital consumer products. A small package with minimal pin-count saves space on the PCB, while a dedicated EN pin and pre-set frequency minimize design effort required for new designs. The skip-mode at light load condition, strong gate drivers and low-side FET RDS(on) current sensing supports low-loss and high efficiency, over a broad load range. The TRAN pin provides freedom of masking overvoltage protection, undervoltage protection and power-good signal during the transition period of dynamic output voltage change for modern GPU power supply applications. The conversion input voltage which is the high-side FET drain voltage ranges from 3 V to 28 V and the output voltage ranges from 0.6 V to 2.6 V. The device requires an external 5-V supply. The TPS51217 is available in a 10-pin SON package specified from –40°C to 85°C.

The TPS51217 is a small-sized single buck controller with adaptive on-time D-CAP™ mode. The device is suitable for low output voltage, high current, PC system power rail and similar point-of-load (POL) power supply in digital consumer products. A small package with minimal pin-count saves space on the PCB, while a dedicated EN pin and pre-set frequency minimize design effort required for new designs. The skip-mode at light load condition, strong gate drivers and low-side FET RDS(on) current sensing supports low-loss and high efficiency, over a broad load range. The TRAN pin provides freedom of masking overvoltage protection, undervoltage protection and power-good signal during the transition period of dynamic output voltage change for modern GPU power supply applications. The conversion input voltage which is the high-side FET drain voltage ranges from 3 V to 28 V and the output voltage ranges from 0.6 V to 2.6 V. The device requires an external 5-V supply. The TPS51217 is available in a 10-pin SON package specified from –40°C to 85°C.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Pin-for-pin with same functionality to the compared device
TPS51211 ACTIVE 4.5-V to 28-V, synchronous buck controller for notebook power Adds dynamic voltage control.
Similar functionality to the compared device
TPS53219A ACTIVE 3-V to 28-V, 20-A, synchronous D-CAP buck controller with Eco Mode Next-generation controller with a higher switching frequency in a QFN package.

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Data sheet High Performance, Single Synchronous Step-Down Controller .. datasheet (Rev. B) 01 Feb 2012
User guide TPS51217 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 14 Feb 2022

Design & development

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

Simulation model

TPS51217 PSpice Transient Model (Rev. B)

SLIM181B.ZIP (74 KB) - PSpice Model
Simulation model

TPS51217 TINA-TI Transient Reference Design

SLUM172.TSC (203 KB) - TINA-TI Reference Design
Simulation model

TPS51217 TINA-TI Transient Spice Model

SLUM173.ZIP (47 KB) - TINA-TI Spice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins Download
WSON (DSC) 10 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos