LMZ31710

ACTIVE

2.95V to 17V, 10A Step-Down Power Module with Current Sharing in 10x10x4.3mm QFN Package

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Product details

Parameters

Iout (Max) (A) 10 Vin (Min) (V) 2.95 Vin (Max) (V) 17 Vout (Min) (V) 0.6 Vout (Max) (V) 5.5 Soft start Adjustable Features Current Sharing, EMI Tested, Frequency Synchronization, Light Load Efficiency, Power Good, Remote Sense, Tracking Operating temperature range (C) -40 to 85 Iq (Typ) (uA) 800 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 1200 Switching frequency (Min) (kHz) 200 Duty cycle (Max) (%) 100 Topology Buck, Synchronous Buck open-in-new Find other Buck modules (integrated inductor)

Package | Pins | Size

B3QFN (RVQ) 42 100 mm² 10 x 10 open-in-new Find other Buck modules (integrated inductor)

Features

  • Complete integrated power solution
    • Small footprint, low-profile design
    • Pin compatible with LMZ31707 and LMZ31704
    • 10-mm × 10-mm × 4.3-mm package
  • Efficiencies up to 95%
  • Eco-Mode™ and light load efficiency (LLE)
  • Wide-output voltage adjust
    0.6 V to 5.5 V, With 1% reference accuracy
  • Supports parallel operation for higher current
  • Optional split power rail allows
    input voltage down to 2.95 V
  • Adjustable switching frequency
    (200 kHz to 1.2 MHz)
  • Synchronizes to an external clock
  • Provides 180° out-of-phase clock signal
  • Adjustable slow start
  • Output voltage sequencing and tracking
  • Power-good output
  • Programmable undervoltage lockout (UVLO)
  • Overcurrent and overtemperature protection
  • Prebias output start-up
  • Operating temperature range: –40°C to +85°C
  • Enhanced thermal performance: 13.3°C/W
  • Meets EN55022 Class B emissions
    - integrated shielded inductor
  • Create a custom design using the LMZ31710 with the WEBENCH® Power Designer
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Description

The LMZ31710 power module is an easy-to-use integrated power solution that combines a 10-A DC/DC converter with power MOSFETs, a shielded inductor, and passives into a low-profile QFN package. This total power solution allows as few as three external components and eliminates the loop compensation and magnetics part selection process.

The 10 × 10 × 4.3 mm QFN package is easy to solder onto a printed circuit board and allows a compact point-of-load design. The device achieves greater than 95% efficiency and excellent power dissipation capability with a thermal impedance of 13.3°C/W. The LMZ31710 offers the flexibility and the feature set of a discrete point-of-load design and is ideal for powering a wide range of ICs and systems. Advanced packaging technology affords a robust and reliable power solution compatible with standard QFN mounting and testing techniques.

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Technical documentation

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Type Title Date
* Data sheet LMZ31710 10-A Module, 2.95-V to 17-V Input and Current Sharing in QFN Package datasheet (Rev. F) Apr. 22, 2020
Application note Soldering Considerations for Power Modules (Rev. B) May 17, 2021
Application note Soldering Requirements for BQFN Packages (Rev. C) Mar. 05, 2020
Application note Practical Thermal Design With DC/DC Power Modules (Rev. A) Nov. 20, 2019
Selection guide Innovative DC/DC Power Modules Selection Guide (Rev. C) Feb. 27, 2018
Technical article FPGA power made simple: design steps Nov. 20, 2017
White paper Simplify low EMI design with power modules Nov. 20, 2017
Technical article Making trade-offs when integrating input and output capacitors in a DC/DC step-down power module Sep. 11, 2017
White paper Benefits and trade-offs of various power-module package options Aug. 02, 2017
Application note Working With QFN Power Modules (Rev. A) Jun. 08, 2017
Selection guide TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Application note Power Module MSL Ratings Jan. 20, 2017
Application note Using LMZ31710 for Higher Output Voltages Nov. 09, 2015
Technical article Power up with SIMPLE SWITCHER® products and new WEBENCH® tools Jul. 08, 2015
Application note Adjusting LMZ3 Output Voltage with LM10010/1 Feb. 11, 2014
User guide LMZ31710 Parallel User's Guide Jan. 24, 2014
Application note LMZ31710, LMZ31707, LMZ31704 Parallel Jul. 02, 2013
Application note Powering LMZ3 SIMPLE SWITCHER Power Modules From 3.3 V Jul. 02, 2013
User guide LMZ31710, LMZ31707 and LMZ31704 EVM User's Guide (Rev. A) Jun. 13, 2013

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

The LMZ31710 EVM is designed to help the user easily evaluate and test the operation and functionality of the LMZ31710 buck module. The EVM convert a 2.95-V to 17-V input voltage to a regulated 0.6-V to 5-V output voltage that delivers up to 10 A in a 10-mm x 10-mm QFN package. The output (...)

Features
  • Wide operating input voltage range of 2.95 V to 17 V is ideal for 5-V or 12-V rails
  • Output voltages from 0.6 V to 5 V
  • Switching frequency range 200 kHz to 1 mHz
  • Control test points to use power good and inhibit/UVLO, synchronization, and slow-start tracking features
  • Recommended PCB layout for maximized (...)
EVALUATION BOARD Download
LMZ31710 Parallel Board
LMZ31710X2EVM
document-generic User guide
49
Description

The LMZ31710X2EVM is designed to help the user easily evaluate and test the operation and functionality of the LMZ31710 buck module in two-phase configuration. The EVM convert a 2.95-V to 17-V input voltage to a regulated output voltage (0.6 V, 0.9 V, 1.2 V, and 1.8 V selected using a jumper) that (...)

Features
  • Wide operating input voltage range of 2.95 V to 17 V is ideal for 5-V or 12-V rails
  • Output voltages from 0.6 V to 1.8 V
  • Up to 18-A output current
  • Switching frequency range 200 KHz to 1 MHz
  • 180 degree out-of-phase operation
  • Control test points to use power good and iInhibit/UVLO, synchronization, and (...)

Design tools & simulation

SIMULATION MODEL Download
SNVM523.ZIP (31 KB) - PSpice Model
SIMULATION MODEL Download
SNVM541.ZIP (129 KB) - PSpice Model
SIMULATION MODEL Download
SNVM791.ZIP (7 KB) - PSpice Model
SIMULATION TOOL 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
Arria V Power Reference Design
PMP8610 Power Solution Reference Design for Arria V FPGA from Altera.  This solution uses integrated inductor modules for ease of use to help design power solution for Arria V FPGA from Altera.  This design incorporate sequencing need for the PFGA as well.

Special Note

Go to the TPS84 to LMZ3 part number cross (...)

document-generic Schematic
Design files
REFERENCE DESIGNS Download
Inverting Buck Boost Power Module Reference Design
PMP10638 The PMP10638 reference design is a -5.2V 4A output power supply using SIMPLE SWITCHER® LMZ31710 Power Module. The reference design takes advantage of the small package and high level integration of LMZ31710 to achieve small solution size. It can support -5.2V 4A output power from 3.1V-3.3V input (...)
document-generic Schematic
REFERENCE DESIGNS Download
Xilinx Kintex UltraScale FPGA Power Solution Reference Design with PMBus
PMP9444 The PMP9444 reference design provides all the power supply rails necessary to power Xilinx's Kintex UltraScale family of FPGAs.  It features two UCD90120A's for flexible power up and power down sequencing as well as voltage monitoring, current monitoring, and voltage margining through the (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
B3QFN (RVQ) 42 View options

Ordering & quality

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
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  • Qualification summary
  • Ongoing reliability monitoring

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