LM5146

Name: LM5146
Brand: TI
SKU: LM5146
Price: 1.581 USD

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Synchroner DC/DC-Abwärtscontroller mit großem Arbeitsbereich, 100 V

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Datenblatt

document-pdfAcrobat LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range datasheet (Rev. A) (Englisch) PDF | HTML

LM5146

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Vin (min) (V)

5.5

Vin (max) (V)

100

Iout (max) (A)

20

Operating temperature range (°C)

-40 to 150

Control mode

Voltage mode

Topology

Buck

Rating

Catalog

Vout (min) (V)

0.8

Vout (max) (V)

60

Features

Adjustable current limit, Enable, Frequency synchronization, Load Disconnect, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable

Iq (typ) (µA)

1800

Duty cycle (max) (%)

99

TI functional safety category

Functional Safety-Capable

Vin (min) (V)

5.5

Vin (max) (V)

100

Iout (max) (A)

20

Operating temperature range (°C)

-40 to 150

Control mode

Voltage mode

Topology

Buck

Rating

Catalog

Vout (min) (V)

0.8

Vout (max) (V)

60

Features

Adjustable current limit, Enable, Frequency synchronization, Load Disconnect, Output discharge, Power good, Pre-Bias Start-Up, Synchronous Rectification, UVLO adjustable

Iq (typ) (µA)

1800

Duty cycle (max) (%)

99

TI functional safety category

Functional Safety-Capable

VQFN (RGY)

20

15.75 mm² 4.5 x 3.5

Functional Safety-Capable
- Documentation available to aid functional safety system design
Versatile synchronous buck DC/DC controller
- Wide input voltage range of 5.5 V to 100 V
- 150°C maximum junction temperature
- 0.8-V reference with ±1% feedback accuracy
- Adjustable output voltage from 0.8 V to 60 V
- 40-ns t_ON(min) for high V_IN / V_OUT ratio
- 140-ns t_OFF(min) for low dropout
- Lossless R_DS(on) or shunt current sensing
- Optimized for CISPR 11 and CISPR 32 Class B EMI requirements
Switching frequency from 100 kHz to 1 MHz
- SYNC in and SYNC out capability
- Selectable diode emulation or FPWM
7.5-V gate drivers for standard V_TH MOSFETs
- 14-ns adaptive dead-time control
- 2.3-A source and 3.5-A sink capability
Fast line and load transient response
- Voltage-mode control with line feedforward
- High gain-bandwidth error amplifier
Inherent protection features for robust design
- Adjustable output voltage soft start
- Hiccup-mode overcurrent protection
- Input UVLO with hysteresis
- VCC and gate-drive UVLO protection
- Precision enable input and open-drain PGOOD indicator for sequencing and control
- Thermal shutdown protection with hysteresis
20-pin VQFN package with wettable flanks
Create a custom design using the LM5146 with WEBENCH Power Designer

Functional Safety-Capable
- Documentation available to aid functional safety system design
Versatile synchronous buck DC/DC controller
- Wide input voltage range of 5.5 V to 100 V
- 150°C maximum junction temperature
- 0.8-V reference with ±1% feedback accuracy
- Adjustable output voltage from 0.8 V to 60 V
- 40-ns t_ON(min) for high V_IN / V_OUT ratio
- 140-ns t_OFF(min) for low dropout
- Lossless R_DS(on) or shunt current sensing
- Optimized for CISPR 11 and CISPR 32 Class B EMI requirements
Switching frequency from 100 kHz to 1 MHz
- SYNC in and SYNC out capability
- Selectable diode emulation or FPWM
7.5-V gate drivers for standard V_TH MOSFETs
- 14-ns adaptive dead-time control
- 2.3-A source and 3.5-A sink capability
Fast line and load transient response
- Voltage-mode control with line feedforward
- High gain-bandwidth error amplifier
Inherent protection features for robust design
- Adjustable output voltage soft start
- Hiccup-mode overcurrent protection
- Input UVLO with hysteresis
- VCC and gate-drive UVLO protection
- Precision enable input and open-drain PGOOD indicator for sequencing and control
- Thermal shutdown protection with hysteresis
20-pin VQFN package with wettable flanks
Create a custom design using the LM5146 with WEBENCH Power Designer

The LM5146 100-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high-voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5146 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance industrial controls, robotics, datacom, and RF applications.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications.

The LM5146 100-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high-voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5146 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance industrial controls, robotics, datacom, and RF applications.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications.

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Technische Dokumentation

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Alle anzeigen 9

	Typ	Titel		Datum
*	Data sheet	LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range datasheet (Rev. A)	PDF \| HTML	23 Jun 2021
	Application note	Controller to Converter – Design Considerations for 24V and 48V Systems	PDF \| HTML	02 Okt 2024
	Functional safety information	LM5146 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA	PDF \| HTML	23 Jun 2021
	E-book	An Engineer’s Guide to Low EMI in DC/DC Regulators		21 Apr 2021
	EVM User's guide	LM5146-Q1EVM User's Guide		10 Aug 2018
	White paper	An overview of radiated EMI specifications for power supplies		05 Jun 2018
	White paper	An overview of conducted EMI specifications for power supplies		01 Feb 2018
	Application brief	Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout		13 Nov 2017
	EVM User's guide	LM5145EVM-HD-20A High Density Evaluation Module (Rev. A)		07 Jun 2017

Design und Entwicklung

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

Evaluierungsplatine

LM5145EVM-HD-20A — LM5145 Kompakter Synchron-Abwärtsregler mit großem VIN – Evaluierungsmodul

The LM5145EVM-HD-20A high density evaluation module (EVM) is designed to showcase the performance of the LM5145 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a wide (...)

Benutzerhandbuch: PDF

Nicht verfügbar auf TI.com

Evaluierungsplatine

LM5146-Q1-EVM12V — Evaluierungsmodul für synchronen Abwärtsregler

The LM5146-Q1-EVM12V high density evaluation module (EVM) is designed to showcase the performance of the LM5146-Q1 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a (...)

Benutzerhandbuch: PDF

Nicht verfügbar auf TI.com

Simulationsmodell

LM5146 PSpice Unencrypted Transient Model Package

SNVMC65.ZIP (301 KB) - PSpice Model

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Berechnungstool

LM5146DESIGN-CALC — LM5146-Q1 synchroner Abwärts-Controller – Quickstart-Designtool

Welcome to the LM5146-Q1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the LM5146-Q1 95-V synchronous buck controller. As such, the user can expeditiously arrive at an optimized design to meet the (...)

Benutzerhandbuch: PDF

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