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LM5156-Q1

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2.2Mhz wide VIN automotive non-synchronous boost/SEPIC/flyback controller with spread spectrum

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Product details

Parameters

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, Power Good, UVLO Adjustable Duty cycle (Max) (%) 93 Type Controller Rating Automotive Operating temperature range (C) -40 to 125 open-in-new Find other Boost controllers (external switch)

Package | Pins | Size

WSON (DSS) 12 - WSON (DSS) 12 6 mm² 3 x 2 open-in-new Find other Boost controllers (external switch)

Features

  • AEC-Q100 Qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C TA
  • 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

All trademarks are the property of their respective owners.

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

Description

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 internal VCC regulator also supports BIAS pin operation up to 60 V (65-V absolute maximum) for automotive load dump. The switching frequency is dynamically programmable with an external resistor from 100 kHz to 2.2 MHz. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response. To reduce the EMI of the power supply, the device provides a selectable dual random spread spectrum which reduces the EMI over the wide frequency range.

The device features a 1.5-A standard MOSFET driver and a low 100-mV current limit threshold. The device also supports the use of an external VCC supply to improve efficiency. Low operating current and pulse-skipping operation improve efficiency at light loads.

The device has built-in protection features such as cycle-by-cycle current limit, overvoltage protection, line UVLO, and thermal shutdown. Hiccup mode overload protection is available in the LM51561-Q1 device option. Additional features include low shutdown IQ, programmable soft start, programmable slope compensation, precision reference, power-good indicator, and external clock synchronization.

open-in-new Find other Boost controllers (external switch)
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Sample availability

DSS package is in preview. Preproduction samples are available (XLM5156QDSSTQ1).  Request now

Technical documentation

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No results found. Please clear your search and try again. View all 2
Type Title Date
* Datasheet LM5156x-Q1 2.2-MHz Wide VIN 65-V Non-synchronous Boost/SEPIC/Flyback Controller with Dual Random Spread Spectrum datasheet Jul. 03, 2019
Technical articles How to add overvoltage protection to a synchronous boost controller Sep. 17, 2018

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$59.00
Description

The LM5155EVM-BST evaluation module showcases the features and performance of the LM5155, wide input non-synchronous boost controller. The standard configuration is designed to provide a regulate output of 24V at 2A from an input of 6V to 18V, switching at 440 kHz.

This EVM is designed for ease of (...)

Features
  • Input voltage range: 6V to 18V
  • Output voltage 24V at 2A
  • 440kHz switching frequency
  • External clock synchronization
EVALUATION BOARDS Download
document-generic User guide
$59.00
Description
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 (...)
Features
  • Input voltage range: 18V to 36V
  • Isolated output voltage 5V at 4A
  • Switching frequency 250kHz
  • Two layer PCB with single sided component population
  • Hiccup mode short circuit protection
EVALUATION BOARDS Download
document-generic User guide
$75.00
Description
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.
Features
  • Input voltage range: 3V to 42V
  • Output voltage 12V, up to to 2A
  • Switching frequency 2.2 MHz
  • Two layer PCB with single sided component population
EVALUATION BOARDS Download
document-generic User guide
$59.00
Description

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

This EVM is designed for ease of (...)

Features
  • Input voltage range: 3V to 12V
  • Output voltage: 12V at 3A
  • 440kHz switching frequency
  • Internal spread spectrum operation

Software development

SUPPORT SOFTWARE Download
SNVC240.ZIP (5304 KB)

Design tools & simulation

SIMULATION MODELS Download
SNVMBV9.ZIP (211 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
WSON (DSS) 12 View options

Ordering & quality

Support & training

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