LM5145 datasheet(1/66 Pages) TI2

номер детали	LM5145

подробное описание детали	LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range

PDF	66 Pages

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производитель	TI2 [Texas Instruments]

домашняя страница	https://www.ti.com

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LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range

1 Features

• 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 tON(min) for high VIN / VOUT ratio

– 140-ns tOFF(min) for low dropout

– Lossless RDS(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 VTH 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

2 Applications

• Wireless infrastructure, cloud computing

• Industrial motor drives, test and measurement

• Personal transport vehicle: electric bike

• Asset tracking and fleet management systems

• Non-isolated PoE, IP cameras

• Inverting buck-boost regulators

3 Description

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.

Device Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

LM5146

VQFN (20)

4.50 mm × 3.50 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

BST

HO

SW

VCC

PGND

RT

SS/TRK

COMP

FB

AGND

V

IN

V

OUT

LM5146

VOUT

SYNC In

GND

PG

SYNCOUT

SYNCIN

EN/UVLO

VIN

ILIM

PGOOD

SYNC Out

LO

LF

COUT

Q1

Q2

CIN

RILIM

CVCC

CBST

CSS

RFB2

RFB1

RC2

CC2

CC1

RC1

CC3

RRT

EN

VIN

Typical Application Circuit and Efficiency Performance, VOUT = 12 V, FSW = 400 kHz

LM5146

SNVSBV0A – JUNE 2021 – REVISED JUNE 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Аналогичный номер детали - LM5145

производитель	номер детали	датащи	подробное описание детали
Texas Instruments	LM5145	2Mb / 67P	6-V to 75-V Synchronous Buck DC-DC Controller With Wide Duty Cycle Range
	LM5145	4Mb / 62P	LM5145-Q1 Automotive 75-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
	LM5145	2Mb / 55P	LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
	LM5145	4Mb / 69P	LM25143 3.5-V to 42-V Dual Synchronous Buck DC/DC Controller With Ultra-Low IQ MARCH 2022
	LM5145	5Mb / 70P	LM5148 80-V, Synchronous, Buck DC/DC Controller with Ultra-Low IQ and Dual Random Spread Spectrum FEBRUARY 2023

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Аналогичное описание - LM5145

производитель	номер детали	датащи	подробное описание детали
Analog Devices	ADP1850	1Mb / 32P	Wide Range Input, Dual/Two-Phase, DC-to-DC Synchronous Buck Controller REV. 0
Texas Instruments	LM5145	2Mb / 67P	6-V to 75-V Synchronous Buck DC-DC Controller With Wide Duty Cycle Range
	LM25145	2Mb / 62P	6-V to 42-V Synchronous Buck DC-DC Controller With Wide Duty Cycle Range
	LM5146-Q1	1Mb / 56P	95-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
	LM5146-Q1	2Mb / 61P	100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
	LM5145-Q1	4Mb / 62P	LM5145-Q1 Automotive 75-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
	LM5146	2Mb / 55P	LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
	LM5146	3Mb / 63P	LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
Analog Devices	ADP1850	1Mb / 32P	Wide Range Input, Dual/Two-Phase, DC-to-DC Synchronous Buck Controller Rev. C
Texas Instruments	LV5144	3Mb / 60P	LV5144 95-V, Synchronous, Buck DC/DC Controller With Wide Duty Cycle Range AUGUST 2023

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