Datasheet > LT3045

LT3045

更新时间： 2024-11-06 14:57:27

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
32页	4557K
描述
20V、500mA、超低噪声、超高 PSRR 线性稳压器

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中文翻译

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LT3045 数据手册

LT3045

20V, 500mA, Ultralow Noise,

Ultrahigh PSRR Linear Regulator

FEATURES

DESCRIPTION

The LT^®3045 is a high performance low dropout linear

regulator featuring LTC’s ultralow noise and ultrahigh

PSRR architecture for powering noise sensitive applica-

tions. Designed as a precision current reference followed

by a high performance voltage buffer, the LT3045 can be

easily paralleled to further reduce noise, increase output

current and spread heat on the PCB.

Ultralow RMS Noise: 0.8µV

(10Hz to 100kHz)

RMS

Ultralow Spot Noise: 2nV/√Hz at 10kHz

Ultrahigh PSRR: 76dB at 1MHz

Output Current: 500mA

Wide Input Voltage Range: 1.8V to 20V

Single Capacitor Improves Noise and PSRR

100µA SET Pin Current: 1% Initial Accuracy

Single Resistor Programs Output Voltage

High Bandwidth: 1MHz

The device supplies 500mA at a typical 260mV dropout

voltage. Operating quiescent current is nominally 2.2mA

and drops to <<1µA in shutdown. The LT3045’s wide

output voltage range (0V to 15V) while maintaining unity-

gain operation provides virtually constant output noise,

PSRR, bandwidth and load regulation, independent of the

programmed output voltage. Additionally, the regulator

features programmable current limit, fast start-up capa-

bility and programmable power good to indicate output

voltage regulation.

Programmable Current Limit

Low Dropout Voltage: 260mV

Output Voltage Range: 0V to 15V

Programmable Power Good

Fast Start-Up Capability

Precision Enable/UVLO

Parallelable for Lower Noise and Higher Current

Internal Current Limit with Foldback

Minimum Output Capacitor: 10µF Ceramic

Reverse-Battery and Reverse-Current Protection

12-Lead MSOP and 10-Lead 3mm × 3mm DFN Packages

AEC-Q100 Qualified for Automotive Applications

TheLT3045isstablewithaminimum10µFceramicoutput

capacitor. Built-in protection includes reverse-battery

protection, reverse-current protection, internal current

limit with foldback and thermal limit with hysteresis. The

LT3045 is available in thermally enhanced 12-Lead MSOP

and 10-Lead 3mm × 3mm DFN packages.

APPLICATIONS

RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs

Very Low Noise Instrumentation

All registered trademarks and trademarks are the property of their respective owners.

High Speed/High Precision Data Converters

Medical Applications: Imaging, Diagnostics

Precision Power Supplies

Post-Regulator for Switching Supplies

Power Supply Ripple Rejection

TYPICAL APPLICATION

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LT3045

5V 5ꢀ

4.7µF*

100µA

–

EN/UV

ꢀꢁ

OUT

200k

OUT

ꢀꢁ

OUT(MAX)

OUTS

500mA

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SET

GND ILIM PGFB

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10µF

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402k

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249Ω

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4.7µF

30.1k

49.9k

*OPTIONAL, SEE

APPLICATIONS

INFORMATION

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3045 TA01a

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Rev. D

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与LT3045相关器件

型号	品牌	获取价格	描述	数据表
LT3045-1	Linear	获取价格	20V, 500mA, Ultralow Noise, Ultrahigh PSRR Linear Regulator with VIOC Control
LT3045-1	ADI	获取价格	具 VIOC 控制功能的 20V、500mA、超低噪声、超高 PSRR 线性稳压器
LT3046	ETC	获取价格	TRANSISTOR \| BJT \| NPN \| 200MA I(C) \| TO-46
LT3046	ADI	获取价格	20V, 200mA, Ultra-Low Noise, Ultra-High PSRR, Linear Regulator
LT3048	Linear	获取价格	Low Noise Bias Generator in 2mm 2mm DFN
LT3048	ADI	获取价格	采用 2mm x 2mm DFN 封装的低噪声偏置发生器
LT3048_15	Linear	获取价格	Low Noise Bias Generator in 2mm 2mm DFN
LT3048IDC-5#PBF	Linear	获取价格	LT3048 Series - Low Noise Bias Generator in 2mm x 2mm DFN; Package: DFN; Pins: 8; Temperat
LT3050	Linear	获取价格	100mA, Linear Regulator with Precision Current Limit and Diagnostic Outputs
LT3050	ADI	获取价格	具精准电流限值和诊断功能的 100mA、性稳压器

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