Datasheet > SGM822

SGM822

更新时间： 2024-11-18 15:19:11

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
10页	597K
描述
3-Rail Power Sequencer with Programmable Timing

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SGM822 数据手册

SGM822

3-Rail Power Sequencer

with Programmable Timing

GENERAL DESCRIPTION

FEATURES

The SGM822 is an integrated, 3-rail power sequencer.

It controls the power-up and power-down sequence of

three power supplies by pulling their enable or

shutdown pins high or low. Staggered start sequence

can avoid the impact of latch conditions or large inrush

current on system reliability.

● Up to 3-Rail Power Sequence Control

● Low Quiescent Current: 36μA (TYP)

● Input Voltage Range: 2.7V to 5.5V

● Pin-Selected Flag Output Logic

● Capacitor-Programmable Power-Up/Power-Down

Sequencing Delay

● Available in a Green MSOP-8 Package

This simple sequencer has three open-drain output

flags. When the enable (EN) pin is pulled high, the flags

are successively released from FLAG1 to FLAG3 after

individual programmable delay time. Then the

connected power supplies power up. When the EN pin

is pulled low, the flags output low with a reverse

sequence from FLAG3 to FLAG1 after individual

programmable delay time. The delay time is

programmed by connecting a capacitor between the

TADJ pin and ground. The logic of the output flags can

be inverted by the user.

APPLICATIONS

Multivoltage Systems

Servers

Networking Systems

Telecom Equipment

Microprocessor, Microcontroller and FPGA Sequencing

Multiple Supply Sequencing

The SGM822 is available in a Green MSOP-8 package.

It operates over an ambient temperature range of -40℃

to +125℃.

TYPICAL SYSTEM APPLICATION

TYPICAL APPLICATION

Power Supply

2.7V to 5.5V Supply

Device 2

VCC

FLAG1

VCC

R₁

100kΩ

R₂

100kΩ

R₃

100kΩ

Enable Input

Enable

Invert

Device 2

SGM822

FLAG2

Flag 1

INV

FLAG1

Flag 2

Flag 3

FLAG2

FLAG3

INV

Device 2

FLAG3

TADJ

C_ADJ

10nF

GND

Figure 2. Typical Application Circuit

Figure 1. Typical System Application

SG Micro Corp

AUGUST2020–REV. A.1

www.sg-micro.com

12 3 4 5 6 7...10

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