LM5116

ACTIVE

6-100V Wide Vin, Current Mode Synchronous Buck Controller

Top

Product details

Parameters

Vin (Min) (V) 6 Vin (Max) (V) 100 Vout (Min) (V) 1.215 Vout (Max) (V) 80 Iout (Max) (A) 20 Iq (Typ) (uA) 4600 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1000 Features Adjustable Current Limit, Enable, Frequency Synchronization, Light Load Efficiency, Synchronous Rectification, UVLO Adjustable Operating temperature range (C) -40 to 150 Regulated outputs (#) 1 Number of Phases 1 Rating Catalog open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 open-in-new Find other Buck controllers (external switch)

Features

  • Emulated Peak Current Mode
  • Wide Operating Range Up to 100 V
  • Low IQ Shutdown (< 10 µA)
  • Drives Standard or Logic Level MOSFETs
  • Robust 3.5-A Peak Gate Drive
  • Free-run or Synchronous Operation to 1 MHz
  • Optional Diode Emulation Mode
  • Programmable Output from 1.215 V to 80 V
  • Precision 1.5% Voltage Reference
  • Programmable Current Limit
  • Programmable Soft-Start
  • Programmable Line Undervoltage Lockout
  • Automatic Switch to External Bias Supply
  • HTSSOP-20 Exposed Pad
  • Thermal Shutdown
  • Create a Custom Design Using the LM5116 with the WEBENCH Power Designer

All trademarks are the property of their respective owners.

open-in-new Find other Buck controllers (external switch)

Description

The LM5116 is a synchronous buck controller intended for step-down regulator applications from a high-voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease-of-loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high-input voltage applications.

The operating frequency is programmable from 50 kHz to 1 MHz. The LM5116 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation, for improved efficiency at light load conditions. A low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current.

Additional features include a high-voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle-by-cycle current limit, and adjustable line undervoltage lockout. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.

open-in-new Find other Buck controllers (external switch)
Download

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 15
Type Title Date
* Datasheet LM5116 Wide Range Synchronous Buck Controller datasheet (Rev. H) Jul. 31, 2015
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) Apr. 10, 2019
White paper Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) Jul. 03, 2018
Selection guide DC/DC Buck Controller Solutions Selection Guide Feb. 06, 2018
Selection guide Control-Mode Quick Reference Guide (Rev. A) Sep. 14, 2017
Application note Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics Jul. 21, 2016
White paper Choosing the Right Fixed Frequency Buck Regulator Control Strategy Oct. 02, 2015
White paper Choosing the Right Fixed Frequency Buck Regulator Control Strategy (PPT) Oct. 02, 2015
Technical articles High cell battery packs fuel new applications and extend time between charges Sep. 03, 2015
Technical articles Exploiting current-mode control for wide Vin DC/DC conversion Aug. 14, 2014
Technical articles Why wide VIN ICs for a 12V or 24V rail? Oct. 29, 2013
White paper Wide VIN power management ICs simplify white paper (Rev. A) Sep. 19, 2013
User guide AN-1596 LM5116 Evaluation Board (Rev. C) Apr. 24, 2013
User guide AN-1713 LM5116-12 Evaluation Board (Rev. A) Apr. 24, 2013
Application note Minimizing FET Losses For a High Input Rail Buck Converter (Rev. A) Apr. 23, 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
75
Description

The LM5116-12 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5116 controller IC. The evaluation board provides a 12V output with a 5A current capability. The operating input voltage ranges (...)

EVALUATION BOARD Download
20
Description

The LM5116 Webench® BuildIt PCB is designed to provide the design engineer with a way to check out their fully functional power converter based Webench Design based on the LM5116 controller IC. The PCB supports the buck topology and allows for wide input voltage ranges from 6V to 100V. The (...)

Features

The performance of this evaluation PCB is as follows:

  • Input Range: 7V to 100V
  • Output Voltage: positive voltages only (buck configuration)
  • Output Current: 0 to 20A
  • Designed for Buck Applications
EVALUATION BOARD Download
75
Description

LM5116 Wide Range Synchronous Buck Controller

Features
  • Emulated peak current mode
  • Wide operating range up to 100V
  • Low IQ sleep mode (<10µA)
  • Drives standard or logic level MOSFETs
  • Robust 2A peak gate drive
  • Free-run or synchronous operation to 1MHz
  • Optional diode emulation mode
  • Programmable output from 1.215V to 80V
  • Precision 1.5% voltage reference
  • Programmable (...)

Design tools & simulation

SIMULATION MODEL Download
SNVM051B.TSC (159 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNVM052B.ZIP (15 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SNVM345C.ZIP (101 KB) - PSpice Model
SIMULATION MODEL Download
SNVM346.ZIP (53 KB) - PSpice Model
SIMULATION MODEL Download
SNVM958A.ZIP (6 KB) - PSpice Model
SIMULATION MODEL Download
SNVM959.ZIP (2 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
  • (...)
CALCULATION TOOL Download
LM(2)5116/WG Quick Start Component Calculator
LM5116-5116WG-25116DESIGN-CALC

Reference designs

REFERENCE DESIGNS Download
Class 4 PoE Synchronous Buck Converter (12V/2A) Reference Design
PMP11257 — The LM5116 synchronous buck controller provides a high efficiency solution for non-isolated PoE PD applications.  The TPS2378 PoE PD controller performs all necessary functions for an IEEE802.3at compliant Class 4 PoE PD.  This converter is ideal for any PoE application that demands best (...)
document-generic Schematic
REFERENCE DESIGNS Download
40W Synchronous ZETA Converter with Coupled-Inductor Reference Design
PMP9581_REVB This coupled-inductor, 13.2V at 4A, synchronous ZETA converter achieves greater than 95% efficiency at full load. It is capable of 5A out for Vin greater than 10V. It utilizes all surface mount components, maintains a low temperature rise and is capable of high peak load transients. See PMP9581 REVC (...)
document-generic Schematic
REFERENCE DESIGNS Download
40W Synchronous ZETA Converter with Two Inductors Reference Design
PMP9581_REVC This dual-inductor, 13.2V at 4A, synchronous ZETA converter achieves greater than 93% efficiency at full load. It is capable of 5A out for Vin greater than 10V. It utilizes all surface mount components, maintains a low temperature rise and is capable of high peak load transients.  See PMP9581 (...)
document-generic Schematic
REFERENCE DESIGNS Download
60Vin 12Vout @ 4A Buck Reference Design
PMP9333 The circuit has an operating input voltage range of 50V to 60V max. The output is set at 12V at 4A continuous, with a 7A peak transient.
Design files
REFERENCE DESIGNS Download
20Vin to 70Vin; 12Vout @ 1A; Synchronous Buck Converter
PMP7994 — A single-phase synchronous buck converter that accepts an input voltage of 20Vin to 70Vin and provides an output of 12Vout capable of supplying 1A.
Design files
REFERENCE DESIGNS Download
35V to 60V Input, 600W Output Dual-Phase Buck Converter Design with Greater than 97% Efficiency
PMP7282 This 600W wide voltage input dual phase power converter uses two emulated current-mode controllers 180 degrees out of phase to minimize input and output ripple current. Compared to conventional isolated power converters, this synchronous buck architecture provides a reduced footprint and BOM cost at (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 20 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

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