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LM5158-Q1

ACTIVE

3-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum

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Data sheet

LM5158-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Capable Topology Boost, Flyback, SEPIC Type Converter Vin (min) (V) 1.5 Vin (max) (V) 60 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2200 Features Enable, Frequency synchronization, Nonsynchronous rectification, Power good, Spread Spectrum, UVLO adjustable Control mode current mode Vout (min) (V) 2 Vout (max) (V) 83 Iq (typ) (µA) 670 Duty cycle (max) (%) 93 Switch current limit (typ) (A) 3.75
Rating Automotive Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Capable Topology Boost, Flyback, SEPIC Type Converter Vin (min) (V) 1.5 Vin (max) (V) 60 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2200 Features Enable, Frequency synchronization, Nonsynchronous rectification, Power good, Spread Spectrum, UVLO adjustable Control mode current mode Vout (min) (V) 2 Vout (max) (V) 83 Iq (typ) (µA) 670 Duty cycle (max) (%) 93 Switch current limit (typ) (A) 3.75
WQFN (RTE) 16 9 mm² 3 x 3
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C TA
  • Functional Safety-Capable
  • Suited for wide operating range for car battery applications
    • 3.2-V to 60-V input operating range (65-V abs max)
    • 83-V maximum output (85-V abs max)
    • Minimum boost supply voltage of 1.5 V when BIAS ≥ 3.2 V
    • Input transient protection up to 65 V
    • Minimized battery drain
      • Low shutdown current (IQ ≤ 2.6 µA)
      • Low operating current (IQ ≤ 670 µA)
  • Small solution size and low cost
    • Maximum switching frequency up to 2.2 MHz
    • 16-pin QFN package (3 mm × 3 mm) with wettable flanks
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
    • Minimized undershoot during cranking
    • Accurate current limit (see the Device Comparison Table)
  • EMI mitigation
    • Selectable dual random spread spectrum
    • Lead-less package
  • Higher efficiency with low-power dissipation
    • 133-mΩ RDSON switch
    • Fast switching, small switching loss
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Dynamically programmable wide switching frequency from 100 kHz to 2.2 MHz
  • Integrated protection features
    • Constant current limiting over input voltage
    • Selectable hiccup mode overload protection
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • Accurate ±1% accuracy feedback reference
  • Adjustable soft start
  • PGOOD indicator
  • Create a custom design using the LM5158x -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 operating range for car battery applications
    • 3.2-V to 60-V input operating range (65-V abs max)
    • 83-V maximum output (85-V abs max)
    • Minimum boost supply voltage of 1.5 V when BIAS ≥ 3.2 V
    • Input transient protection up to 65 V
    • Minimized battery drain
      • Low shutdown current (IQ ≤ 2.6 µA)
      • Low operating current (IQ ≤ 670 µA)
  • Small solution size and low cost
    • Maximum switching frequency up to 2.2 MHz
    • 16-pin QFN package (3 mm × 3 mm) with wettable flanks
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
    • Minimized undershoot during cranking
    • Accurate current limit (see the Device Comparison Table)
  • EMI mitigation
    • Selectable dual random spread spectrum
    • Lead-less package
  • Higher efficiency with low-power dissipation
    • 133-mΩ RDSON switch
    • Fast switching, small switching loss
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Dynamically programmable wide switching frequency from 100 kHz to 2.2 MHz
  • Integrated protection features
    • Constant current limiting over input voltage
    • Selectable hiccup mode overload protection
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • Accurate ±1% accuracy feedback reference
  • Adjustable soft start
  • PGOOD indicator
  • Create a custom design using the LM5158x -Q1 with the WEBENCH Power Designer

The LM5158x -Q1 device is a wide input range, non-synchronous boost converter with an integrated 85-V, 3.26-A (LM5158 -Q1) or 85-V, 1.63-A (LM51581 -Q1) power switch.

The device can be used in boost, SEPIC, and flyback topologies. It can start up from a single-cell battery with a minimum of 3.2 V. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.2 V.

The BIAS pin operates up to 60 V (65-V absolute maximum) for automotive load dump. The switching frequency is dynamically programmable from 100 kHz to 2.2 MHz with an external resistor. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response. The device provides a selectable Dual Random Spread Spectrum to help reduce the EMI over a wide frequency range.

The device features an accurate peak current limit over the input voltage, which avoids overdesigning the power inductor. Low operating current and pulse-skipping operation improve efficiency at light loads.

The device has built-in protection features such as overvoltage protection, line UVLO, thermal shutdown, and selectable hiccup mode overload protection. Additional features include low shutdown IQ, programmable soft start, precision reference, a power-good indicator, and external clock synchronization.

The LM5158x -Q1 device is a wide input range, non-synchronous boost converter with an integrated 85-V, 3.26-A (LM5158 -Q1) or 85-V, 1.63-A (LM51581 -Q1) power switch.

The device can be used in boost, SEPIC, and flyback topologies. It can start up from a single-cell battery with a minimum of 3.2 V. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.2 V.

The BIAS pin operates up to 60 V (65-V absolute maximum) for automotive load dump. The switching frequency is dynamically programmable from 100 kHz to 2.2 MHz with an external resistor. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response. The device provides a selectable Dual Random Spread Spectrum to help reduce the EMI over a wide frequency range.

The device features an accurate peak current limit over the input voltage, which avoids overdesigning the power inductor. Low operating current and pulse-skipping operation improve efficiency at light loads.

The device has built-in protection features such as overvoltage protection, line UVLO, thermal shutdown, and selectable hiccup mode overload protection. Additional features include low shutdown IQ, programmable soft start, precision reference, a power-good indicator, and external clock synchronization.
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Technical documentation

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Type Title Date
* Data sheet LM5158x-Q1 2.2-MHz Wide VIN 85-V Output Boost/SEPIC/Flyback Converter with Dual Random Spread Spectrum datasheet (Rev. A) PDF | HTML 20 Oct 2021
White paper Isolated Bias Power Supply Architecture for HEV and EV Traction Inverters PDF | HTML 11 Oct 2023
Application note How to Implement the Soft Start in a Flyback PDF | HTML 10 Jul 2023
Application note How to Design an Isolated Flyback Converter Using LM5157x/LM5158x (Rev. A) PDF | HTML 16 Mar 2023
Application note Basic Calculation of a Coupled Inductor SEPIC Power Stage PDF | HTML 13 Mar 2023
Application note LM5157x, LM5158x를 사용하여 부스트 컨버터를 설계하는 방법 PDF | HTML 28 Oct 2022
Application note How to Design a Boost Converter Using LM5157x, LM5158x PDF | HTML 11 Nov 2021
Functional safety information LM5158x-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 20 Sep 2021
Technical article Lowering audible noise in automotive applications with TI’s DRSS technology PDF | HTML 18 Mar 2021

Design & development

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

Evaluation board

LM5157EVM-SEPIC — LM5157 evaluation module for SEPIC

The LM5157EVM-SEPIC evaluation module showcases the features and performance of the LM5157 as wide input non-synchronous SEPIC converter. The standard configuration is designed to provide a regulated output of 12 V at up to 1 A from an input of 4 V to 32 V, switching at 2.1 MHz.

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

LM5158EVM-BST — LM5158-Q1 boost converter evaluation module

The LM5158EVM-BST evaluation module showcases the features and performance of the LM5158 device as a wide input voltage boost converter with dual random spread spectrum. The standard configuration is designed to provide a regulated output of 12 V at 1.2 A from an input of 3 V to 9 V (...)
User guide: PDF | HTML
Not available on TI.com
Evaluation board

LM5158EVM-FLY — LM5158-Q1 flyback converter evaluation module

The LM5158EVM-FLY evaluation module showcases the features and performance of the LM5158 as a flyback converter to produce multiple output voltage rails for typical applications of the 3 phase inverter gate driver bias supplies.  The standard configuration is designed to provide a regulate (...)
User guide: PDF | HTML
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Simulation model

LM5158x-Q1 PSpice Boost Average Model (Encrypted)

SNVMC91.ZIP (41 KB) - PSpice Model
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Simulation model

LM5158x-Q1 PSpice Transient Model (Encrypted) (Rev. A)

SNVMC90A.ZIP (182 KB) - PSpice Model
Download
Calculation tool

SNVR508 — LM515x Quickstart Calculator for Flyback Regulator Design

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LM5157 — 6A/4A, 50-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM5157-Q1 — 6-A, 50-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM51571-Q1 — 4-A, 50-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM5158 — 3-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM5158-Q1 — 3-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM51581 — 1.5-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM51581-Q1 — 1.5-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum
Hardware development
Evaluation board
LM5158EVM-FLY — LM5158-Q1 flyback converter evaluation module
Download
Calculation tool

SNVR511 — LM5157 and LM5158 Quickstart Calculator for Boost Regulator Design

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LM5157 — 6A/4A, 50-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM5157-Q1 — 6-A, 50-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM51571-Q1 — 4-A, 50-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM5158 — 3-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM5158-Q1 — 3-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM51581 — 1.5-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM51581-Q1 — 1.5-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum
Download
Calculation tool

SNVR512 — LM5157 and LM5158 Quickstart Calculator for SEPIC Regulator Design

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LM5157 — 6A/4A, 50-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM5157-Q1 — 6-A, 50-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM51571-Q1 — 4-A, 50-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM5158 — 3-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM5158-Q1 — 3-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM51581 — 1.5-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum LM51581-Q1 — 1.5-A, 85-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum
Download
Reference designs

TIDA-020060 — Automotive power over data lines reference design for 100/1000Base-T1 Ethernet applications

This reference design demonstrates an implementation of Power over Data Lines (PoDL) for automotive use cases. The design uses a DP83TG720S-Q1 1000MBit/s single-pair Ethernet (SPE) PHY with the option to switch to the DP83TC812S-Q1 SPE PHY for 100MBit/s operation. A coupling and decoupling network (...)
Design guide: PDF
Reference designs

PMP31139 — Tiny automotive SEPIC reference design using 80-V integrated FET

This reference design is a small SEPIC converter using LM5158 with an integrated FET. This design has a very small board space that sets the switching frequency to 2 MHz. This means accepting some switching and magnetizing losses. Despite the losses, the efficiency is up to 400 mA and 80% and more.
Test report: PDF
Package Pins CAD symbols, footprints & 3D models
WQFN (RTE) 16 Ultra Librarian
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