LM5088

ACTIVE

4.5-75V Wide Vin, Current Mode Non-Synchronous Buck Controller

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LM5141 ACTIVE Low Iq, Wide Input Range Synchronous Buck Controller Optional spread spectrum for improved EMI.

Product details

Vin (min) (V) 4.5 Vin (max) (V) 75 Iout (max) (A) 10 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 1.205 Vout (max) (V) 70 Features Adjustable current limit, Enable, Frequency synchronization, Spread Spectrum Iq (typ) (µA) 3800 Duty cycle (max) (%) 100 Number of phases 1
Vin (min) (V) 4.5 Vin (max) (V) 75 Iout (max) (A) 10 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 1.205 Vout (max) (V) 70 Features Adjustable current limit, Enable, Frequency synchronization, Spread Spectrum Iq (typ) (µA) 3800 Duty cycle (max) (%) 100 Number of phases 1
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C5
  • Emulated current mode control
  • Drives external high-side N-channel MOSFET
  • Ultra-wide input voltage range from 4.5 V to 75 V
  • Low IQ shutdown and standby modes
  • High duty cycle ratio feature for reduced dropout voltage
  • Spread spectrum EMI reduction (LM5088-1)
  • Hiccup timer for overload protection (LM5088-2)
  • Adjustable output voltage from 1.205 V with 1.5% feedback reference accuracy
  • Wide bandwidth error amplifier
  • Single resistor oscillator frequency setting
  • Oscillator synchronization capability
  • Programmable soft start
  • High voltage, low dropout bias regulator
  • Thermal shutdown protection
  • 16-pin HTSSOP package
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C5
  • Emulated current mode control
  • Drives external high-side N-channel MOSFET
  • Ultra-wide input voltage range from 4.5 V to 75 V
  • Low IQ shutdown and standby modes
  • High duty cycle ratio feature for reduced dropout voltage
  • Spread spectrum EMI reduction (LM5088-1)
  • Hiccup timer for overload protection (LM5088-2)
  • Adjustable output voltage from 1.205 V with 1.5% feedback reference accuracy
  • Wide bandwidth error amplifier
  • Single resistor oscillator frequency setting
  • Oscillator synchronization capability
  • Programmable soft start
  • High voltage, low dropout bias regulator
  • Thermal shutdown protection
  • 16-pin HTSSOP package

The LM5088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using a minimum number of external components. The LM5088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 75 V. This easy-to-use controller includes a level-shifted gate driver capable of controlling an external N-channel buck switch. The control method is based upon peak current mode control utilizing an emulated current ramp. 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 and low output voltage applications. The LM5088 switching frequency is programmable from 50 kHz to 1 MHz.

The LM5088 is available in two versions: The LM5088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI, while the LM5088-2 provides a versatile restart timer for overload protection. Additional features include a low dropout bias regulator, tri-level enable input to control shutdown and standby modes, soft start, and oscillator synchronization capability. The device is available in a thermally enhanced 16-pin HTSSOP package.

The LM5088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using a minimum number of external components. The LM5088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 75 V. This easy-to-use controller includes a level-shifted gate driver capable of controlling an external N-channel buck switch. The control method is based upon peak current mode control utilizing an emulated current ramp. 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 and low output voltage applications. The LM5088 switching frequency is programmable from 50 kHz to 1 MHz.

The LM5088 is available in two versions: The LM5088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI, while the LM5088-2 provides a versatile restart timer for overload protection. Additional features include a low dropout bias regulator, tri-level enable input to control shutdown and standby modes, soft start, and oscillator synchronization capability. The device is available in a thermally enhanced 16-pin HTSSOP package.

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Technical documentation

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Type Title Date
* Data sheet LM5088, LM5088-Q1 Wide Input Range Non-Synchronous Buck Controller datasheet (Rev. J) PDF | HTML 08 Jun 2022
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 10 Apr 2019
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 21 Jul 2016
Technical article Power Tips: Automotive EMI Series: Dithering? Not always a bad thing PDF | HTML 10 Feb 2016
Application note Load Dump and Cranking Protection for Automotive Backlight LED Power Supply (Rev. A) 16 Mar 2015
Application note Automated Frequency Response Analyzer 09 Oct 2013
EVM User's guide AN-1913 LM5088 Evaluation Board (Rev. E) 30 Apr 2013
Application note Improve Power Converter Reliability Using Hiccup-Mode Current Limiting 11 May 2009

Design & development

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

Evaluation board

LM5088MH-1EVAL — LM5088-1 - Wide Input Range Non-Synchronous Buck Controller with Dithering Evaluation Module

The LM5088-1 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5088 controller IC. The LM5088 evaluation board is available in two versions (like the LM5088 controller): the LM5088-1 (...)

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

LM5088MH-2EVAL — LM5088-2 - Wide Input Range Non-Synchronous Buck Controller with Hiccup Mode Restart

The LM5088-2 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5088 controller IC. The LM5088 evaluation board is available in two versions (like the LM5088 controller): the LM5088-1 (...)

User guide: PDF
Not available on TI.com
Simulation model

LM5088 PSpice Average Model

SNVM355.ZIP (46 KB) - PSpice Model
Simulation model

LM5088 PSpice Transient Model

SNVM356.ZIP (200 KB) - PSpice Model
Simulation model

LM5088 TINA-TI Transient Reference Design

SNVM022.TSC (136 KB) - TINA-TI Reference Design
Simulation model

LM5088 TINA-TI Transient Spice Model

SNVM021.ZIP (16 KB) - TINA-TI Spice Model
Simulation model

LM5088 Unencrypted PSpice Average Model

SNVM957.ZIP (1 KB) - PSpice Model
Simulation model

LM5088 Unencrypted PSpice Transient Model

SNVM956.ZIP (2 KB) - PSpice Model
Calculation tool

LM25088-5088QUICK-CALC — LM(2)5088 Quick Start Calculator

Package Pins CAD symbols, footprints & 3D models
HTSSOP (PWP) 16 Ultra Librarian

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