Datasheet > LM46000-Q1

LM46000-Q1

更新时间： 2024-11-07 01:09:15

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
50页	1681K
描述
SIMPLE SWITCHER 3.5 V to 60 V 0.5 A Synchronous Step-Down Voltage Converter

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LM46000-Q1

SNVSAA1A –JULY 2015–REVISED AUGUST 2015

LM46000-Q1 SIMPLE SWITCHER 3.5 V to 60 V 0.5 A Synchronous Step-Down Voltage

Converter

1 Features

3 Description

The LM46000-Q1 SIMPLE SWITCHER^®regulator is

an easy to use synchronous step-down DC-DC

converter capable of driving up to 500 mA of load

current from an input voltage range of 3.5 V to 60 V.

The LM46000-Q1 provides exceptional efficiency,

output accuracy and drop-out voltage in a very small

solution size. An extended family is available in 1 A

and 2 A load current options in pin-to-pin compatible

packages. Peak current mode control is employed to

achieve simple control loop compensation and cycle-

by-cycle current limiting. Optional features such as

programmable switching frequency, synchronization,

power-good flag, precision enable, internal soft-start,

extendable soft-start, and tracking provide a flexible

and easy to use platform for a wide range of

applications. Discontinuous conduction and automatic

frequency modulation at light loads improve light load

efficiency. The family requires few external

components and pin arrangement allows simple,

optimum PCB layout. Protection features include

thermal shutdown, V_CCunder-voltage lockout, cycle-

by-cycle current limit, and output short circuit

protection. The LM46000-Q1 device is available in

the HTSSOP / PWP 16 leaded package (5.1 mm x

6.6 mm x 1.2 mm) with 0.65 mm lead pitch. Pin-to-pin

compatible with LM46001, LM46002, LM43603,

LM43602, LM43601, and LM43600.

•

AEC-Q100 Qualified (–40°C to +125°C Operating

Junction Temperature)

•

24 µA Quiescent Current in Regulation

High Efficiency at Light Load (DCM and PFM)

Tested to EN55022/CISPR 22 EMI standards

Integrated Synchronous Rectification

Adjustable Frequency Range: 200 kHz to 2.2 MHz

(500 kHz default)

•

Frequency Synchronization to External Clock

Internal Compensation

Stable with Almost Any Combination of Ceramic,

Polymer, Tantalum, and Aluminum Capacitors

•

Power-Good Flag

Soft-Start into Pre-Biased Load

Internal Soft-Start: 4.1 ms

Extendable Soft-Start Time by External Capacitor

Output Voltage Tracking Capability

Precision Enable to Program System UVLO

Output Short Circuit Protection with Hiccup Mode

Over Temperature Thermal Shutdown Protection

2 Applications

Device Information⁽¹⁾

•

Sub-AM Band 12 V and 24 V Automotive

Industrial Power Supplies

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM46000-Q1

HTSSOP (16)

5.1 mm x 6.6 mm

Telecommunications Systems

Commercial Vehicle Power Supplies

General Purpose Wide V_INRegulation

High Efficiency Point-Of-Load Regulation

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

4 Simplified Schematic

Radiated Emission Graph

V_OUT= 3.3 V, V_IN= 24 V, F_S= 500 kHz, I_OUT= 0.5 A

V_OUT

V_IN

VIN

dBuV

C_OUT

Vertical Polarization

C_IN

LM46000-Q1

C_BOOT

Horizontal Polarization

CBOOT

BIAS

ENABLE

PGOOD

EN 55022 Class B Limit

C_BIAS

C_FF

R_FBT

SS/TRK

Evaluation Board Emissions

100

Frequency (MHz)

1000

VCC

SYNC

AGND

R_FBB

C_VCC

PGND

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.

12 3 4 5 6 7...50

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与LM46000-Q1相关器件

型号	品牌	获取价格	描述	数据表
LM46000-Q1_15	TI	获取价格	SIMPLE SWITCHER 3.5 V to 60 V 0.5 A Synchronous Step-Down Voltage Converter
LM46000QPWPRQ1	TI	获取价格	SIMPLE SWITCHER 3.5 V to 60 V 0.5 A Synchronous Step-Down Voltage Converter
LM46000QPWPTQ1	TI	获取价格	SIMPLE SWITCHER 3.5 V to 60 V 0.5 A Synchronous Step-Down Voltage Converter
LM46001	TI	获取价格	3.5 至 60V、1A 同步降压转换器
LM46001AQPWPRQ1	TI	获取价格	通过汽车级认证的 3.5 至 60V、1A 同步降压电压转换器 \| PWP \| 16 \|
LM46001AQPWPTQ1	TI	获取价格	通过汽车级认证的 3.5 至 60V、1A 同步降压电压转换器 \| PWP \| 16 \|
LM46001PWP	TI	获取价格	3.5 至 60V、1A 同步降压转换器 \| PWP \| 16 \| -40 to 125
LM46001PWPEVM	TAOS	获取价格	evaluation module (EVM) helps designers evaluate the operation
LM46001PWPR	TI	获取价格	3.5 至 60V、1A 同步降压转换器 \| PWP \| 16 \| -40 to 125
LM46001PWPT	TI	获取价格	3.5 至 60V、1A 同步降压转换器 \| PWP \| 16 \| -40 to 125

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