Datasheet > MIC2775_09

MIC2775_09

更新时间： 2024-02-13 11:29:52

品牌	Logo	应用领域
麦瑞 - MICREL		监控
页数	文件大小	规格书
7页	334K
描述
Micro-Power Voltage Supervisor

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MIC2775_09 数据手册

MIC2775

Micrel, Inc.

MIC2775

Micro-Power Voltage Supervisor

General Description

Features

The MIC2775 is a power supply supervisor that provides

under-voltage monitoring, manual reset capability, and

power-on reset generation in a compact 5-pin SOT package.

Features include an under-voltage detector, a delay genera-

tor, a manual reset input, and both active-high and active-low

• Monitors power supply for under-voltage conditions

• Choice of factory-programmed thresholds

• Generates 140ms (minimum) power-on RESET pulse

• Manual reset capability

• Both active-high and active-low RESET outputs

• /RST output valid down to 1.2V

reset outputs. The under-voltage detector compares V

againstaﬁxedthreshold.Tenfactory-programmedthresholds

are available.

• Ultra-low supply current, 3.5µA typical

• Rejects brief input transients

• No external components

• Pin compatible upgrade for MAX825

• IttyBitty™ 5-pin SOT-23 package

The reset outputs are asserted for no less than 140ms at

power-on and any time the input voltage drops below the

reference voltage. It remains asserted for the timeout period

after the input voltage subsequently rises back above the

threshold boundary. A reset can be generated at any time

by asserting the manual reset input, /MR. This reset output

will remain active at least 140ms after the release of /MR.

The /MR input can also be used to daisy-chain the MIC2775

onto existing power monitoring circuitry or other supervisors.

Hysteresis is included to prevent chattering due to noise.

Typical supply current is a low 3.5µA.

Applications

• Monitoring processor core and input/output voltages

• Computer systems

• PDAs, hand-held PCs

• Embedded controllers

• Telecommunications systems

• Power supplies

Ordering Information

Part Number

Junction Temp. Range

Package

Standard

Marking Pb-Free

UJXX MIC2775-XXYM5

Marking

MIC2775-XXBM5

UJXX

–40ºC to +85ºC

SOT-23-5

Typical Application

MIC2775-17

RST

1.8V

OTHER

LOGIC

VDD

MICROPROCESSOR

/MR /RST

GND

VDD

/RESET

GND

Manual

Reset

IttyBitty™ is a trademark of Micrel, Inc.

Micrel, Inc. • 2180Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

June 2009

MIC2775

12 3 4 5 6 7

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