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 Regulated outputs (#) 1 Number of Phases 1 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1000 Iq (Typ) (mA) 3.8 Features Adjustable Current Limit, Enable, Frequency Synchronization, Spread Spectrum Duty cycle (Max) (%) 100 Operating temperature range (C) -40 to 125 Type Controller Rating Catalog Control mode Current Mode 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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Download

Technical documentation

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
$49.00
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 BOARDS Download
document-generic User guide
$49.00
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 MODELS Download
SNVM021.ZIP (16 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVM022.TSC (136 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM355.ZIP (46 KB) - PSpice Model
SIMULATION MODELS Download
SNVM356.ZIP (200 KB) - PSpice Model
SIMULATION MODELS Download
SNVM956.ZIP (2 KB) - PSpice Model
SIMULATION MODELS Download
SNVM957.ZIP (1 KB) - PSpice Model
CALCULATION TOOLS Download
LM(2)5088 Quick Start Calculator
LM25088-5088QUICK-CALC

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 16 View options

Ordering & quality

Support & training

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