Datasheet > LT3093

LT3093

更新时间： 2024-09-26 14:57:59

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	4246K
描述
–20V、200mA、超低噪声、超高 PSRR 负线性稳压器

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LT3093 数据手册

LT3093

–20V, 200mA, Ultralow Noise, Ultrahigh

PSRR Negative Linear Regulator

FEATURES

DESCRIPTION

The LT^®3093 is a high performance low dropout negative

linear regulator featuring ADI’s ultralow noise and ultrahigh

PSRR architecture for powering noise sensitive applica-

tions. The device can be easily paralleled to further reduce

noise, increase output current and spread heat on a PCB.

Ultralow RMS Noise: 0.8µV

(10Hz to 100kHz)

RMS

Ultralow Spot Noise: 2.2nV/√Hz at 10kHz

Ultrahigh PSRR: 73dB at 1MHz

Output Current: 200mA

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

Programmable Current Limit

The LT3093 supplies 200mA at a typical 190mV dropout

voltage. Operating quiescent current is nominally 2.35mA

and drops to 3µA in shutdown. The device’s wide output

voltage range (0V to –19.5V) error amplifier operates in

unity-gain and provides virtually constant output noise,

PSRR, bandwidth, and load regulation independent of

the programmed output voltage. Additional features are a

bipolar enable pin, programmable current limit, fast start-

up capability and programmable power good to indicate

output voltage regulation. The regulator incorporates a

tracking function to control an upstream supply to main-

tain a constant voltage across the LT3093 to minimize

power dissipation and optimize PSRR.

Low Dropout Voltage: 190mV

Output Voltage Range: 0V to –19.5V

Programmable Power Good and Fast Start-Up

Bipolar Precision Enable/UVLO Pin

VIOC Pin Controls Upstream Regulator to Minimize

Power Dissipation and Optimize PSRR

Minimum Output Capacitor: 4.7µF Ceramic

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

APPLICATIONS

The LT3093 is stable with a minimum 4.7µF ceramic out-

put capacitor. Built-in protection includes internal current

limit with foldback and thermal limit with hysteresis. The

LT3093 is available in thermally enhanced 12-Lead MSOP

and 3mm × 3mm DFN Packages.

RF and Precision Power Supplies

Very Low Noise Instrumentation

High Speed/High Precision Data Converters

Medical Applications: Diagnostics and Imaging

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

Post-Regulator for Switching Supplies

TYPICAL APPLICATION

Power Supply Ripple Rejection

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