Top

Product details

Parameters

Supply voltage (Min) (V) 2.2 Supply voltage (Max) (V) 18 Number of outputs 2 Peak output current (A) 10 Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Digital power control drivers & powertrain modules

Package | Pins | Size

VQFN-HR (RSJ) 32 36 mm² 6 x 6 open-in-new Find other Digital power control drivers & powertrain modules

Features

  • Fully Integrated Power Switches With Drivers
    for Dual Synchronous Buck Converters
  • Full Compatibility With TI Fusion Digital Power Supply
    Controllers, Such as the UCD92xx Family
  • Wide Input Voltage Range: 4.75 V to 18 V
    Operational Down to 2.2 V Input With an External Bias Supply
  • Up to 10A Output Current per Channel
  • Operational to 2 MHz Switching Frequency
  • High Side Current Limit With Current Limit Flag
  • Onboard Regulated 6 V Driver Supply From VIN
  • Thermal Protection
  • Temperature Sense Output – Voltage Proportional to Chip Temperature
  • UVLO and OVLO Circuits Ensure Proper Drive Voltage
  • Rated From –40°C to 125°C Junction Temperature
  • RoHS Compliant
  • Accurate On-Die Current Sensing (±5%)
  • APPLICATIONS
    • Digitally-Controlled Synchronous-Buck Power Stages
    • High Current Dual-Phase VRM/EVRD Regulators for Desktop, Server, Telecom and
      Notebook Processors

open-in-new Find other Digital power control drivers & powertrain modules

Description

The UCD7242 is a complete power system ready to drive two independent buck power supplies. High side MOSFETs, low side MOSFETs, drivers, current sensing circuitry and necessary protection functions are all integrated into one monolithic solution to facilitate minimum size and maximum efficiency. Driver circuits provide high charge and discharge current for the high-side NMOS switch and the low-side NMOS synchronous rectifier in a synchronous buck circuit. The MOSFET gates are driven to +6.25 V by an internally regulated VGG supply. The internal VGG regulator can be disabled to permit the user to supply an independent gate drive voltage. This flexibility allows a wide power conversion input voltage range of 2.2V to 18V. Internal under voltage lockout (UVLO) logic ensures VGG is good before allowing chip operation.

The synchronous rectifier enable (SRE) pin controls whether or not the low-side MOSFET is turned on when the PWM signal is low. When SRE is high the part operates in continuous conduction mode for all loads. In this mode the drive logic block uses the PWM signal to control both the high-side and low-side gate drive signals. Dead time is also optimized to prevent cross conduction. When SRE is low, the part operates in discontinuous conduction mode at light loads. In this mode the low-side MOSFET is always held off.

On-board comparators monitor the current through the high side switch to safeguard the power stage from sudden high current loads. Blanking delay is set for the high side comparator to avoid false reports coincident with switching edge noise. In the event of an over-current fault, the high-side FET is turned off and the Fault Flag (FLT) is asserted to alert the controller.

MOSFET current is measured and monitored by a precision integrated current sense element. This method provides an accuracy of ±5% over most of the load range. The amplified signal is available for use by the controller on the IMON pin.

An on-chip temperature sense converts the die temperature to a voltage at the TMON pin for the controller’s use. If the die temperature exceeds 170°C, the temperature sensor initiates a thermal shutdown that halts output switching and sets the FLT flag. Normal operation resumes when the die temperature falls below the thermal hysteresis band.

open-in-new Find other Digital power control drivers & powertrain modules
Download

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 Digital Dual Synchronous-Buck Power Driver.. datasheet (Rev. B) Aug. 12, 2012
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
User guides Using the UCD9224EVM-464 Aug. 12, 2010

Design & development

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

Software development

APPLICATION SOFTWARE & FRAMEWORKS Download
Digital Power Software
FUSION_DIGITAL_POWER_DESIGNER Fusion Digital Power™  is the Graphical User Interface (GUI) used to configure and monitor select Texas Instruments digital power controllers and sequencer/health monitors. The application uses the PMBus protocol to communicate with the device over serial bus by way of a TI USB adapter.
Features

Some of the tasks you can perform with the GUI include:

  • Turn on or off the power supply output, either through the hardware control line or the PMBus OPERATION command
  • Monitor real-time data. Items such as input voltage, output voltage, output current, temperature, and warnings/faults are continuously (...)
APPLICATION SOFTWARE & FRAMEWORKS Download
Fusion Digital Power Manufacturing Tool
FUSION_MFR_GUI The Fusion Digital Power Manufacturing Tool (aka MFR GUI) is a Graphical User Interface used to download firmware, upgrade firmware, configure, calibrate and test .

The MFR GUI supports the same devices as Fusion Digital Power Designer software.  This tool is typically used in manufacturing (...)

Features

Some of the tasks the tool can perform include:

  • Download/Upgrade firmware
  • Program a device configuration
  • Calibrate a device (manually or instrumented via GPIB):
    • Input voltage (Vin)
    • Output voltage (Vout)
    • Output current (Iout)
    • Temperature
  • Test the device (validate power conversion falls within acceptable Vout (...)

Design tools & simulation

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
High Efficiency, Compact Dual 10A Digital Point-of-Load Reference Design for 5V and 7V Applications
PMP20481 — The PMP20481 reference design pairs digital TPS40425 controller with digital buck driver UCD7242 for a dual 10A point-of-load in a tiny 0.625"x1.075" solution size (15.9mmx27.3mm). UCD7242 fully integrates a dual 10A synchronous buck power driver into a small 6mmx6mm QFN package. The PMP20481 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Reference Design using TMS320C6657 to Implement Efficient OPUS Codec Solution
TIDEP0036 The TIDEP0036 reference design provides an example of the ease of running TI optimized Opus encoder/decoder on the TMS320C6657 device. Since Opus supports a a wide range of bit rates, frame sizes and sampling rates, all with low delay, it has applicability for voice communications, networked audio (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN-HR (RSJ) 32 View options

Ordering & quality

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

Related videos