Datasheet > MAX6474UT28BD1-T

MAX6474UT28BD1-T

更新时间： 2024-11-20 23:50:59

品牌	Logo	应用领域
美信 - MAXIM		稳压器微处理器复位电路
页数	文件大小	规格书
20页	563K
描述
300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit

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MAX6474UT28BD1-T 数据手册

19-2532; Rev 1; 10/02

300mA LDO Linear Regulators with

Internal Microprocessor Reset Circuit

General Description

Features

o 3 ✕ 3 UCSP, 6-Pin SOT23, and 8-Pin QFN Packages

o Preset +1.5V to +3.3V Output (100mV Increments)

o SET Pin for Adjustable Output Voltage

The MAX6469–MAX6484 are low-dropout linear regula-

tors with a fully integrated microprocessor reset circuit.

Each is available with preset output voltages from +1.5V

to +3.3V in 100mV increments and delivers up to 300mA

of load current. These devices consume only 82µA of

supply current. The low supply current, low dropout volt-

age, and integrated reset functionality make these

devices ideal for battery-powered portable equipment.

o 75µV

LDO Output Voltage Noise

RMS

(MAX6477–MAX6484)

2.0ꢀ Accuracꢁ Oꢂer Temperature

o Guaranteed 300mA Output Current

The MAX6469–MAX6484 include a reset output that indi-

cates when the regulator output drops below standard

microprocessor supply tolerances (-7.5% or -12.5% of

nominal output voltage). This eliminates the need for an

external microprocessor supervisor, while ensuring that

supply voltages and clock oscillators have stabilized

before processor activity is enabled. Push-pull and open-

drain active-low reset outputs are available, with reset

timeout periods of 2.5ms, 20ms, 150ms, or 1200ms (min).

o Low Dropout Voltage

55mV at 150mA

114mV at 300mA

o 82µA Supplꢁ Current, 0.1µA Shutdown Current

o Input Reꢂerse Current, Thermal and Short-Circuit

Protection

o Microprocessor Reset with Four Timeout Options

o Push-Pull or Open-Drain RESET

o Manual Reset Input

The MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–

MAX6484 also have a shutdown feature that reduces the

supply current to 0.1µA (typ). The MAX6471–MAX6474/

MAX6479–MAX6482 offer a manual reset input to assert a

microprocessor reset while the regulator output is within

specification. The MAX6475/MAX6476/MAX6483/

MAX6484 feature a remote feedback sense pin for use

with an external NPN transistor for higher-current applica-

tions. The MAX6469–MAX6476 are available in 6-pin

SOT23 and 8-pin thin QFN packages. The MAX6477–

MAX6484 are available in a 3 × 3 chip-scale package

(UCSP™). All devices are specified for operation from

-40°C to +85°C.

o Remote Feedback Sense

Ordering Information

PIN-

PACKAGE

PART

TEMP RANGE

MAX6469UT_ _ _D_-T

MAX6469TA_ _ _D_*

MAX6470UT_ _ _D_-T

MAX6470TA_ _ _D_*

-40°C to +85°C

6 SOT23-6

8 Thin QFN

6 SOT23-6

8 Thin QFN

*Future product—contact factory for availability.

Applications

Hand-Held Instruments (PDAs, Palmtops)

PCMCIA Cards/USB Devices

Cellular/Cordless Telephones

CD/DVD Drives

Note: The first “_ _ are placeholders for the output voltage levels

”

of the devices. Desired output voltages are set by the suffix found

in the Output Voltage Suffix Guide (Table 1). The third “_” is a

placeholder for the reset threshold accuracy. Desired reset

threshold accuracy is set by the suffix found in the Reset

Threshold Accuracy Guide (Table 2). The “_” following the D is a

placeholder for the reset timeout delay time. Desired reset timeout

delay time is set by the suffix found in the Reset Timeout Delay

Guide (Table 3). For example, the MAX6481BL30BD4-T has a

3.0V output voltage, 12.5% reset threshold tolerance, and a

1200ms (min) reset timeout delay. Sample stock is generally avail-

able on standard versions only (Table 4). Standard versions

require a minimum order increment of 2.5k units. Nonstandard

versions must be ordered in 10k-unit increments. Contact factory

for availability.

Notebook Computers

Digital Cameras

Bluetooth Modules/Wireless LAN

UCSP is a trademark of Maxim Integrated Products, Inc.

Ordering Information continued at end of data sheet.

Pin Configurations appear at end of data sheet.

Typical Operating Circuits appear at end of data sheet.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...20

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与MAX6474UT28BD1-T相关器件

型号	品牌	获取价格	描述	数据表
MAX6474UT28BD2	MAXIM	获取价格	Fixed/Adjustable Positive LDO Regulator, 1.229V Min, 5V Max, 0.21V Dropout, BICMOS, PDSO6,
MAX6474UT28BD2-T	MAXIM	获取价格	300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
MAX6474UT28BD3	MAXIM	获取价格	300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
MAX6474UT28BD3-T	MAXIM	获取价格	300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
MAX6474UT28BD4	MAXIM	获取价格	Fixed/Adjustable Positive LDO Regulator, 1.229V Min, 5V Max, 0.21V Dropout, BICMOS, PDSO6,
MAX6474UT28BD4-T	MAXIM	获取价格	300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
MAX6474UT29AD1-T	MAXIM	获取价格	300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
MAX6474UT29AD2	MAXIM	获取价格	Fixed/Adjustable Positive LDO Regulator, 1.229V Min, 5V Max, BICMOS, PDSO6, MO-178AB, SOT-
MAX6474UT29AD2-T	MAXIM	获取价格	300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
MAX6474UT29AD3-T	MAXIM	获取价格	300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit

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