TPS51218

ACTIVE

3V to 28V Input. 20A Synchronous Step Down Controller with DCAP™ Mode for Notebook Power Suppl

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Product details

Parameters

Vin (Min) (V) 3 Vin (Max) (V) 28 Vout (Min) (V) 0.7 Vout (Max) (V) 2.6 Iout (Max) (A) 20 Iq (Typ) (mA) 0.32 Iq (Typ) (uA) 320 Switching frequency (Min) (kHz) 266 Switching frequency (Max) (kHz) 465 Features 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 open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

WSON (DSC) 10 9 mm² 3.00 x 3.00 WSON (DSC) 10 9 mm² 3 x 3 open-in-new Find other Buck controllers (external switch)

Features

  • 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
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Description

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

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 3
Type Title Date
* Datasheet Step-Down Controller for Notebook Power Supply datasheet (Rev. B) Jan. 31, 2012
Application notes Intel Core i3, i5, i7 [Arrandale] Reference Design Jul. 21, 2010
User guides TPS51218EVM User's guide Jan. 19, 2010

Design & development

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

Design tools & simulation

SIMULATION MODELS Download
SLIM117A.ZIP (49 KB) - PSpice Model
SIMULATION MODELS Download
SLUM152.TSC (210 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM153.ZIP (48 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

REFERENCE DESIGNS Download
Synchronous Buck for Intel Core i3, i5, i7 Arrandale SV (1.8V @ 1A)
PMP5783 — PMP5783 is a complete Intel IMVP6.5 Arrandale SV/Clarksfield SV Power Reference Design. Vin is 8-15V. Main CPU is powered by two phase TPS59621. TPS59611 powers graphics processor. DDR3 memory powered by TPS5126. Both 1.05V’s are each powered by TPS51218. Dual TPS51125A powers 5V and 3.3V (...)
REFERENCE DESIGNS Download

CAD/CAE symbols

Package Pins Download
WSON (DSC) 10 View options

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