LM5088

ACTIVE

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

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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 75 Vout (Min) (V) 1.205 Vout (Max) (V) 70 Iout (Max) (A) 10 Iq (Typ) (uA) 3800 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1000 Features Adjustable Current Limit, Enable, Frequency Synchronization, Spread Spectrum Operating temperature range (C) -40 to 125 Regulated outputs (#) 1 Number of Phases 1 Rating Catalog open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 open-in-new Find other Buck controllers (external switch)

Features

  • LM5088-Q1 is an Automotive Grade Product
    that is AEC-Q100 Grade 1 Qualified
    (–40°C to +125°C Operating Junction Temperature)
  • Emulated Current Mode Control
  • Drives External High-Side N-channel MOSFET
  • Ultra-Wide Input Voltage Range from 4.5V to 75V
  • 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
  • Package: HTSSOP (16 Pin)
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Description

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/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 HTSSOP-16 pin package.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet LM5088, LM5088-Q1 Wide Input Range Non-Synchronous Buck Controller datasheet (Rev. I) Aug. 08, 2014
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) Apr. 10, 2019
Application note Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics Jul. 21, 2016
Technical articles Power Tips: Automotive EMI Series: Dithering? Not always a bad thing Feb. 10, 2016
Application note Load Dump and Cranking Protection for Automotive Backlight LED Power Supply (Rev. A) Mar. 16, 2015
Application note Automated Frequency Response Analyzer Oct. 09, 2013
User guide AN-1913 LM5088 Evaluation Board (Rev. E) Apr. 30, 2013
Application note Improve Power Converter Reliability Using Hiccup-Mode Current Limiting May 11, 2009

Design & development

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

Hardware development

EVALUATION BOARD Download
49
Description

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 evaluation (...)

EVALUATION BOARD Download
49
Description

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 evaluation (...)

Design tools & simulation

SIMULATION MODEL Download
SNVM021.ZIP (16 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SNVM022.TSC (136 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNVM355.ZIP (46 KB) - PSpice Model
SIMULATION MODEL Download
SNVM356.ZIP (200 KB) - PSpice Model
SIMULATION MODEL Download
SNVM956.ZIP (2 KB) - PSpice Model
SIMULATION MODEL Download
SNVM957.ZIP (1 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOL Download
LM(2)5088 Quick Start Calculator
LM25088-5088QUICK-CALC

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 16 View options

Ordering & quality

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  • Ongoing reliability monitoring

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