Home Power management DC/DC switching regulators Step-up (boost) regulators Boost controllers (external switch)
Home
Power management
DC/DC switching regulators
Step-up (boost) regulators
Boost controllers (external switch)

LM5156-Q1

ACTIVE

2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum

Order now
Data sheet

LM5156-Q1

ACTIVE
Data sheet Order now

Product details

Topology Boost, Flyback, SEPIC Vin (min) (V) 1.5 Vin (max) (V) 60 Vout (min) (V) 1.5 Vout (max) (V) 300 Regulated outputs (#) 1 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2200 Iq (typ) (mA) 0.49 Features Adjustable current limit, Enable, Frequency synchronization, Improved max. duty cycle, Light Load Efficiency, Nonsynchronous rectification, Power good, Spread Spectrum, UVLO adjustable Duty cycle (max) (%) 93 TI functional safety category Functional Safety-Capable Rating Automotive Operating temperature range (°C) -40 to 150 Type Controller
Topology Boost, Flyback, SEPIC Vin (min) (V) 1.5 Vin (max) (V) 60 Vout (min) (V) 1.5 Vout (max) (V) 300 Regulated outputs (#) 1 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2200 Iq (typ) (mA) 0.49 Features Adjustable current limit, Enable, Frequency synchronization, Improved max. duty cycle, Light Load Efficiency, Nonsynchronous rectification, Power good, Spread Spectrum, UVLO adjustable Duty cycle (max) (%) 93 TI functional safety category Functional Safety-Capable Rating Automotive Operating temperature range (°C) -40 to 150 Type Controller
WSON (DSS) 12 6 mm² 3 x 2
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C TA
  • Functional Safety-Capable
  • Suited for wide input operating range car battery applications
    • 3.5-V to 60-V Operating range (65-V abs max)
    • 2.97-V to 16-V When BIAS = VCC
    • Minimum boost supply voltage 1.5 V when BIAS ≥ 3.5 V
    • Input transient protection up to 65 V
    • Minimized battery drain
      • Low shutdown current (IQ ≤ 2.6 µA)
      • Low operating current (IQ ≤ 490 µA)
  • Small solution size and low cost
    • Maximum switching frequency of 2.2 MHz
    • 12-Pin WSON package (3 mm × 2 mm) with wettable flanks
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
    • Minimized undershoot during cranking (start-stop application)
  • EMI mitigation
    • Selectable dual random spread spectrum
    • Lead-less package
  • Higher efficiency with low-power dissipation
    • 100-mV ±7% accurate current limit threshold
    • Strong 1.5-A peak standard MOSFET driver
    • Supports external VCC supply
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Dynamically programmable switching frequency from 100 kHz to 2.2 MHz
  • Integrated protection features
    • Constant peak current limiting over input voltage
    • Optional hiccup mode overload protection (see the Device Comparison Table)
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • Accurate ±1% accuracy feedback reference
  • Programmable extra slope compensation
  • Adjustable soft start
  • PGOOD indicator
  • Create a custom design using the LM5156x-Q1 with the WEBENCH power designer
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C TA
  • Functional Safety-Capable
  • Suited for wide input operating range car battery applications
    • 3.5-V to 60-V Operating range (65-V abs max)
    • 2.97-V to 16-V When BIAS = VCC
    • Minimum boost supply voltage 1.5 V when BIAS ≥ 3.5 V
    • Input transient protection up to 65 V
    • Minimized battery drain
      • Low shutdown current (IQ ≤ 2.6 µA)
      • Low operating current (IQ ≤ 490 µA)
  • Small solution size and low cost
    • Maximum switching frequency of 2.2 MHz
    • 12-Pin WSON package (3 mm × 2 mm) with wettable flanks
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
    • Minimized undershoot during cranking (start-stop application)
  • EMI mitigation
    • Selectable dual random spread spectrum
    • Lead-less package
  • Higher efficiency with low-power dissipation
    • 100-mV ±7% accurate current limit threshold
    • Strong 1.5-A peak standard MOSFET driver
    • Supports external VCC supply
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Dynamically programmable switching frequency from 100 kHz to 2.2 MHz
  • Integrated protection features
    • Constant peak current limiting over input voltage
    • Optional hiccup mode overload protection (see the Device Comparison Table)
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • Accurate ±1% accuracy feedback reference
  • Programmable extra slope compensation
  • Adjustable soft start
  • PGOOD indicator
  • Create a custom design using the LM5156x-Q1 with the WEBENCH power designer

The LM5156x-Q1 (LM5156-Q1 and LM51561-Q1) device is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies.

The LM5156x-Q1 device can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V.

The LM5156x-Q1 (LM5156-Q1 and LM51561-Q1) device is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies.

The LM5156x-Q1 device can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V.
open-in-new Find other Boost controllers (external switch)
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Pin-for-pin with same functionality to the compared device
LM5155-Q1 ACTIVE 2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, AEC-Q100 qualified Lower voltage version, no spread spectrum

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 14
Type Title Date
* Data sheet LM5156x-Q1 2.2-MHz Wide VIN 65-V Non-synchronous Boost/SEPIC/Flyback Controller with Dual Random Spread Spectrum datasheet (Rev. B) PDF | HTML 05 Jan 2021
Application note How to Implement the Soft Start in a Flyback PDF | HTML 10 Jul 2023
Application note EMI 감소 기법, 듀얼 랜덤 확산 스펙트럼 (Rev. A) PDF | HTML 21 Nov 2022
Application note LM5156을 사용하여 부스트 컨버터를 설계하는 방법 (Rev. A) PDF | HTML 21 Nov 2022
Application note How to Design a Boost Converter Using the LM5156 (Rev. A) PDF | HTML 14 Nov 2022
Application note EMI Reduction Technique, Dual Random Spread Spectrum (Rev. A) 19 Oct 2022
Certificate Automotive PPAP Documentation 18 Jun 2021
Functional safety information LM34966-Q1, LM5156x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution (Rev. C) PDF | HTML 28 Apr 2021
Technical article Introduction to EMI: Standards, causes and mitigation techniques 21 Apr 2021
Technical article Lowering audible noise in automotive applications with TI’s DRSS technology 18 Mar 2021
White paper 透過節省時間和成本的創新技術 降低電源中的EMI 04 Dec 2020
White paper 전원 공급 장치의 EMI 절감을 위한 시간 및 비용 효율적 혁신 04 Dec 2020
White paper Time-Saving and Cost-Effective Innovations for EMI Reduction 11 Nov 2020
Technical article How to add overvoltage protection to a synchronous boost controller 17 Sep 2018

Design & development

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

Evaluation board

LM5155EVM-FLY — LM5155 Flyback Controller Evaluation Module

The LM5155EVM-FLY evaluation module showcases the features and performance of the LM5155 as a wide input non-synchronous flyback controller. The standard configuration is designed to provide a regulated output of 5V at 4A from an input of 18V to 36V, switching at 250 kHz. This evaluation module is (...)
User guide: PDF
Not available on TI.com
Evaluation board

LM5155EVM-SEPIC — LM5155 SEPIC evaluation module

The LM5155EVM-SEPIC evaluation module showcases the features and performance of the LM5155 as wide input non-synchronous SEPIC controller. The standard configuration is designed to provide a regulated output of 12V at up to 2A from an input of 3V to 42V, switching at 2.2 MHz.
User guide: PDF | HTML
Not available on TI.com
Evaluation board

LM5156EVM-BST — LM5156 boost controller evaluation module

The LM5156EVM-BST evaluation module showcases the features and performance of the LM5156-Q1 wide-input voltage non-synchronous boost controller. The standard configuration is designed to provide a regulated output of 12 V at 3 A from an input of 3 V to 12 V, switching at 440 kHz.

This EVM is (...)

User guide: PDF
Not available on TI.com
Evaluation board

LM5156HEVM-FLY — LM5156H flyback controller evaluation module

The LM5156HEVM-FLY evaluation module showcases the features and performance of the LM51561 (TSSOP package) as wide input non-synchronous flyback controller. The standard configuration is designed to provide a regulated output of 5V at 4A from an input of 18V to 36V, switching at 250 kHz. This (...)
User guide: PDF | HTML
Not available on TI.com
Simulation model

Unencrypted LM5156-Q1 PSpice Transient Model Package (Rev. G)

SNVMBV9G.ZIP (204 KB) - PSpice Model
Download
Simulation model

Unencrypted LM5156-Q1 PSpice Transient Model Package (Rev. H)

SNVMBV9H.ZIP (205 KB) - PSpice Model
Download
Simulation model

Unencrypted LM5156x-Q1 PSpice Average Model

SNVMC69.ZIP (42 KB) - PSpice Model
Download
Calculation tool

SNVC224 — LM5155/56 Boost Controller Quick Start Calculator

Supported products & hardware

Supported products & hardware

Products
Boost controllers (external switch)
LM5155 — 2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller LM5155-Q1 — 2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, AEC-Q100 qualified LM51551 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with hiccup LM51551-Q1 — 2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, hiccup mode protection LM5156 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum LM5156-Q1 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum LM51561 — 2.2MHz Wide Input Nonsynchronous Boost,SEPIC,Flyback Controller with Spread Spectrum LM51561-Q1 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with spread spectrum and hiccup LM5156H — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum LM5156H-Q1 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum
Hardware development
Evaluation board
LM5155EVM-BST — LM5155 Boost Controller Evaluation Module
Download
Calculation tool

SNVC240 — LM5155/56 Flyback Controller Quick Start Calculator

LM5155/56 Flyback Controller Quick Start Calculator
Supported products & hardware

Supported products & hardware

Products
Boost controllers (external switch)
LM5155 — 2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller LM5155-Q1 — 2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, AEC-Q100 qualified LM51551 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with hiccup LM51551-Q1 — 2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, hiccup mode protection LM5156 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum LM5156-Q1 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum LM51561 — 2.2MHz Wide Input Nonsynchronous Boost,SEPIC,Flyback Controller with Spread Spectrum LM51561-Q1 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with spread spectrum and hiccup LM51561H — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with spread spectrum and hiccup LM51561H-Q1 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with spread spectrum and hiccup LM5156H — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum LM5156H-Q1 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum
Hardware development
Evaluation board
LM5155EVM-FLY — LM5155 Flyback Controller Evaluation Module LM5156HEVM-FLY — LM5156H flyback controller evaluation module
Download
Calculation tool

SNVR481 — LM5155/56 SEPIC Controller Quick Start Calculator

Supported products & hardware

Supported products & hardware

Products
Boost controllers (external switch)
LM5155 — 2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller LM5155-Q1 — 2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, AEC-Q100 qualified LM51551 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with hiccup LM51551-Q1 — 2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, hiccup mode protection LM5156 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum LM5156-Q1 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum LM51561 — 2.2MHz Wide Input Nonsynchronous Boost,SEPIC,Flyback Controller with Spread Spectrum LM51561-Q1 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with spread spectrum and hiccup LM5156H — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum LM5156H-Q1 — 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with dual random spread spectrum
Hardware development
Evaluation board
LM5155EVM-SEPIC — LM5155 SEPIC evaluation module
Download
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Request
Reference designs

PMP31279 — 12-W nonsynchronous automotive SEPIC reference design

This reference design showcases a 1-A, 1.5-A peak, output current nonsynchronous SEPIC converter based on LM51561, which covers an input voltage range of 6 V to 36 V with an output voltage of 12 V. The efficiency reaches up to 90.5% at 12-V input voltage. The design can operate as low as 4.5 V to (...)
Test report: PDF
Reference designs

PMP30805 — Tiny automotive SEPIC reference design

This tiny automotive SEPIC reference design contains a 6-W auxiliary power supply and is designed for a 12-V bias rail. The wide input accepts cranking down to 4.5 Vmin and surge up to 40 Vmax. Due to switching frequency of 2 MHz, the dual inductor is fairly small, resulting in excellent dynamic (...)
Test report: PDF
Schematic: PDF
Package Pins Download
WSON (DSS) 12 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

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

View all forum topics

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