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Details for Texas Instruments


Automotive Grade 3-75V Wide Vin, Current Mode Non-Synchronous Buck-Boost Controller
Buy Directly from Texas Instruments (14265 in Stock)
$3.2800 per unit
Series Information for LM5118Q1MH/NOPB - Texas Instruments


  • feature
    1.5% Feedback Reference Accuracy
  • feature
    Emulated Peak Current Mode Control
  • feature
    Enable Input Wide Bandwidth Error Amplifier
  • feature
    Integrated High and Low-side Gate Drivers
  • feature
    Internal High Voltage Bias Regulator
  • feature
    LM5118-Q1 is an Automotive Grade Product that is AEC-Q100 grade 1 Qualified (-40u00b0C to 125u00b0C Operating Junction Temperature)
  • feature
    Oscillator Synchronization Capability
  • feature
    Package: HTSSOP-20 (Exposed Pad)
  • feature
    Programmable Soft-Start Time
  • feature
    Smooth Transition Between Step-Down and Step- Up Modes
  • feature
    Switching Frequency Programmable to 500 KHz
  • feature
    Thermal Shutdown
  • feature
    Ultra Low Shutdown Current
  • feature
    Ultra-wide Input Voltage Range from 3 V to 75 V


The LM5118 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement a high performance, cost efficient Buck-Boost regulator using a minimum of external components. The BuckBoost topology maintains output voltage regulation when the input voltage is either less than or greater than the output voltage, making it especially suitable for automotive applications. The LM5118 operates as a buck regulator while the input voltage is sufficiently greater than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output. This dual mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the buck mode and a glitch-free output during mode transitions. This easy-to-use controller includes drivers for the high side buck MOSFET and the low side boost MOSFET. The regulators control method is based upon current mode control utilizing an emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features include current limit, thermal shutdown and an enable input. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.


Supply Voltage Min:
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Automotive Qualification Standard:
RoHS Phthalates Compliant:
MSL 1 - Unlimited
No SVHC (27-Jun-2018)

Alternate Descriptions

Avnet America

DC DC Cntrlr Single-OUT Step Up/Step Down 3V to 75V Input 20-Pin TSSOP EP Tube

Avnet America product

Avnet Europe

DC DC Cntrlr Single-OUT Step Up/Step Down 3V to 75V Input 20-Pin TSSOP EP Tube

Avnet Europe product

Texas Instruments

Automotive Grade 3-75V Wide Vin, Current Mode Non-Synchronous Buck-Boost Controller

Texas Instruments product