Startseite Energiemanagement AC/DC- und DC/DC-Controller (externer FET)
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Energiemanagement
AC/DC- und DC/DC-Controller (externer FET)

LM5088-Q1

AKTIV

Nicht synchroner Abwärtsregler im Strommodus, Automotive Grade, großer Vin-Bereich 4,5–75 V

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Selbe Funktionalität wie der verglichene Baustein bei abweichender Anschlussbelegung
LM5141-Q1 AKTIV Synchroner Abwärtscontroller mit breitem Eingangsspannungsbereich für die Automobilindustrie, 2,2 MH Optional spread spectrum for improved EMI.

LM5088-Q1

AKTIV
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Produktdetails

Rating Automotive Topology Buck Iout (max) (A) 10 Vin (max) (V) 75 Vin (min) (V) 4.5 Vout (max) (V) 70 Vout (min) (V) 1.205 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 3800 Duty cycle (max) (%) 100 Number of phases 1
Rating Automotive Topology Buck Iout (max) (A) 10 Vin (max) (V) 75 Vin (min) (V) 4.5 Vout (max) (V) 70 Vout (min) (V) 1.205 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization Operating temperature range (°C) -40 to 125 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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Technische Dokumentation

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Typ Titel Datum
* 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
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 12 Mär 2019
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 21 Jul 2016
Application note Load Dump and Cranking Protection for Automotive Backlight LED Power Supply (Rev. A) 16 Mär 2015
Application note Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) 26 Okt 2012
Application note Level Shifting Control for an Inverting Buck-boost 10 Okt 2012
Application note Improved Load Current Capability for Cap-Drop Off-Line Power Supply for E-Meter 27 Okt 2011
Application note Improve Power Converter Reliability Using Hiccup-Mode Current Limiting 11 Mai 2009
Analog Design Journal Using a buck converter in an inverting buck-boost topology 12 Okt 2007

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LM5088MH-1EVAL — LM5088-1 – Evaluierungsmodul für nicht synchronen Abwärtsregler mit großem Eingangsbereich und Dithe

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 (...)

Benutzerhandbuch: PDF
Nicht verfügbar auf TI.com
Evaluierungsplatine

LM5088MH-2EVAL — LM5088-2 – nicht synchroner Abwärtsregler mit großem Eingangsspannungsbereich und Hiccup-Modus-Neust

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 (...)

Benutzerhandbuch: PDF
Nicht verfügbar auf TI.com
Simulationsmodell

LM5088 TINA-TI Transient Reference Design

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

LM5088 TINA-TI Transient Spice Model

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

LM25088-5088QUICK-CALC — Lm(2)5088 Schnellstartrechner

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Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
HTSSOP (PWP) 16 Ultra Librarian
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