MAX4917BELT-T 查看數據表（PDF） - Maxim Integrated

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MAX4917BELT-T

100mA/200mA/300mA Current-Limit Switches with Low Shutdown Reverse Current

Maxim Integrated 

19-0544; Rev 2; 6/08

100mA/200mA/300mA Current-Limit Switches

with Low Shutdown Reverse Current

General Description

The MAX4914B/MAX4915A/B/MAX4917A/B family of switch-

es feature internal current limiting to prevent damage to host

devices due to faulty load conditions. These analog switches

have a low 0.2Ω on-resistance and operate from a 2.3V

to 5.5V input voltage range. They are available with guaran-

teed 100mA, 200mA, and 300mA current limits, making

them ideal for SDIO and other load switching applications.

When the switch is on and a load is connected to the

port, a guaranteed blanking time of 14ms ensures that

the transient voltages settle down. If after this blanking

time the load current is greater than the current limit,

the MAX4914B/MAX4915B/MAX4917B latchoff versions

enter a latchoff state where the switch is turned off and

FLAG is issued to the microprocessor. The switch can

be turned on again by cycling the power or the ON pin.

The MAX4915A/MAX4917A have an autoretry feature

where the switch turns off after the blanking time and

then continuously checks to see if the overload condi-

tion is present. The switch turns on and remains on after

the overload condition disappears and FLAG deasserts.

The MAX4914B is available in the tiny 6-pin µDFN

(2mm x 2mm) package, while the MAX4915A/B

and MAX4917A/B are available in both 6-pin µDFN

(2mm x 2mm) and space-saving 5-pin SOT23 pack-

ages. These devices operate over the -40°C to +85°C

extended temperature range.

Applications

Features

♦ Guaranteed Current Limit: 100mA, 200mA, 300mA

♦ Thermal-Shutdown Protection

♦ Reverse Current Protection

♦ 0.2Ω On-Resistance

♦ 14ms Guaranteed Blanking Time

♦ FLAG Function

♦ 80µA Supply Current

♦ 8µA Latchoff Current

(MAX4914B/MAX4915B/MAX4917B)

♦ Autoretry (MAX4915A/MAX4917A)

♦ 0.01µA Shutdown Current

♦ 2.3V to 5.5V Supply Range

♦ Undervoltage Lockout

♦ Fast Current-Limit Response Time (5µs)

♦ Low (0.1µA typ) Reverse Shutdown Current

♦ Tiny 6-Pin µDFN (2mm x 2mm) and 5-Pin SOT23

Packages

PDAs and Palmtop

Devices

Cell Phones

GPS Systems

Handheld Devices

SDIO

USB Ports

Notebook Computers

Ordering Information/Selector Guide

PART

PIN-PACKAGE

TOP MARK

CURRENT LIMIT (mA)

RETRY/LATCH-OFF

MAX4914BELT+T

6 µDFN

ABF

100

Latchoff

MAX4915AELT+T

6 µDFN

ABL

200

Autoretry

MAX4915AEUK+T*

5 SOT23

AEYN

200

Autoretry

MAX4915BELT+T

6 µDFN

ABG

200

Latchoff

MAX4915BEUK+T*

5 SOT23

AEYK

200

Latchoff

MAX4917AELT+T

6 µDFN

ABN

300

Autoretry

MAX4917AEUK+T*

5 SOT23

AEYP

300

Autoretry

MAX4917BELT+T

6 µDFN

ABI

300

Latchoff

MAX4917BEUK+T*

5 SOT23

AEYM

300

Latchoff

Note: All devices are specified over the -40°C to +85°C operating temperature range.

*Future product—contact factory for availability.

+Denotes a lead-free/RoHS-compliant package.

T = Tape-and-reel package.

Pin Configurations and Typical Operating Circuit appear at

end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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