TC1266VOA

更新时间： 2024-11-22 03:06:55

品牌	Logo	应用领域
美国微芯 - MICROCHIP		PC
页数	文件大小	规格书
16页	516K
描述
200mA PCI LDO

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中文翻译

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数据手册

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TC1266VOA 数据手册

TC1266

200mA PCI LDO

Features

General Description

• Glitch Free Transition Between Input Sources

• Automatic Input Source Selection

• External PMOS Bypass Switch Control

• Built-in 5V Detector

The TC1266 is an application-specific, low dropout

regulator (LDO), specifically intended for use in PCI

peripheral card applications complying with PCI Power

Management (PCI 2.0). It provides an uninterrupted,

3.3V, 200mA (max) output voltage when the main (5V)

or auxiliary (3.3V) input voltage supplies are present.

• 1% Regulated Output Voltage Accuracy

• 200mA Load Current Capability

• Kelvin Sense Input

The TC1266 consists of an LDO, a voltage threshold

detector, external switchover logic and gate drive

circuitry. It functions as a conventional LDO as long as

• Low Dropout Voltage (240mV @ Full Load)

• Low Ground Current, Independent of Load

the voltage on the main supply input (V ) is above the

lower threshold (3.90V typical). Should the voltage on

fall below the lower threshold, the LDO is disabled

Applications

and an external P-channel MOSFET is automatically

turned on, connecting the auxiliary supply input to

• PCMCIA

• PCI

and ensuring an uninterrupted 3.3V output. The

OUT,

• Network Interface Cards (NICs)

• Cardbus^TMTechnology

main supply is automatically selected, if both the main

and auxiliary input supplies are present, and transition

from one input supply to the other is ensured glitch-

free. High integration, automatic secondary supply

switchover, Kelvin sensing, and small size make the

TC1266 the optimum LDO for PCI 2.0 applications.

Device Selection Table

Junction

Temp. Range

Part Number

Package

Functional Block Diagram

TC1266VOA 8-Pin SOIC (Narrow) -5°C to +125°C

TC1266VUA

8-Pin MSOP

-5°C to +125°C

Package Type

Detect

AUX

8-Pin SOIC

Bandgap

Reference

–

E/A

OUT

TC1266

SENSE

GND

SENSE

AUX

GND

8-Pin MSOP

TC1266

OUT

SENSE

AUX

GND

2002 Microchip Technology Inc.

DS21377B-page 1

12 3 4 5 6 7...16

中文翻译

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