TPS51218

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 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Control mode D-CAP Rating Catalog Vout (min) (V) 0.7 Vout (max) (V) 2.6 Features Enable, Light Load Efficiency, Power good, Pre-Bias Start-Up, Synchronous Rectification Iq (typ) (µA) 320 Duty cycle (max) (%) 91 Number of phases 1
Vin (min) (V) 3 Vin (max) (V) 28 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Control mode D-CAP Rating Catalog Vout (min) (V) 0.7 Vout (max) (V) 2.6 Features Enable, Light Load Efficiency, Power good, Pre-Bias Start-Up, Synchronous Rectification Iq (typ) (µA) 320 Duty cycle (max) (%) 91 Number of phases 1
WSON (DSC) 10 9 mm² 3 x 3
  • Wide Input Voltage Range: 3 V to 28 V
  • Output Voltage Range: 0.7 V to 2.6 V
  • Wide Output Load Range: 0 to 20A+
  • Built-in 0.5% 0.7 V Reference
  • D-CAP™ Mode with 100-ns Load Step Response
  • Adaptive On Time Control Architecture With 4 Selectable
    Frequency Setting
  • 4700 ppm/°C RDS(on) Current Sensing
  • Internal 1-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: 0.7 V to 2.6 V
  • Wide Output Load Range: 0 to 20A+
  • Built-in 0.5% 0.7 V Reference
  • D-CAP™ Mode with 100-ns Load Step Response
  • Adaptive On Time Control Architecture With 4 Selectable
    Frequency Setting
  • 4700 ppm/°C RDS(on) Current Sensing
  • Internal 1-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 TPS51218 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 selections 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 conversion input voltage which is the high-side FET drain voltage ranges from 3 V to 28 V and the output voltage ranges from 0.7 V to 2.6 V. The device requires an external 5-V supply. The TPS51218 is available in a 10-pin SON package specified from –40°C to 85°C.

The TPS51218 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 selections 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 conversion input voltage which is the high-side FET drain voltage ranges from 3 V to 28 V and the output voltage ranges from 0.7 V to 2.6 V. The device requires an external 5-V supply. The TPS51218 is available in a 10-pin SON package specified from –40°C to 85°C.

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Technical documentation

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Type Title Date
* Data sheet Step-Down Controller for Notebook Power Supply datasheet (Rev. B) 31 Jan 2012
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
User guide TPS51218 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 14 Feb 2022
Application note Intel Core i3, i5, i7 [Arrandale] Reference Design 21 Jul 2010

Design & development

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

Simulation model

TPS51218 TINA-TI Transient Reference Design

SLUM152.TSC (210 KB) - TINA-TI Reference Design
Simulation model

TPS51218 TINA-TI Transient Spice Model

SLUM153.ZIP (48 KB) - TINA-TI Spice Model
Simulation model

TPS51218 Unencrypted PSpice Transient Model Package (Rev. A)

SLIM117A.ZIP (49 KB) - PSpice Model
Package Pins Download
WSON (DSC) 10 View options

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