General Description

The MAX4795–MAX4798 family of switches feature inter-

nal current limiting to prevent damage to host devices

due to faulty load conditions. These analog switches

have a low 0.2

Ω on-resistance and operate from a 2.0V

to 4.5V input voltage range. They are available with guar-

anteed 450mA and 500mA 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 the

transient voltages settle down. If after this blanking time,

the load current is greater than the current limit, the

MAX4795 and MAX4797 switches are turned off and

FLAG is issued to the microprocessor. The switch can be

turned on again by cycling the power or the ON input.

The MAX4796 and MAX4798 have an autoretry feature

where the switch turns off and issues a FLAG to the

microprocessor after the blanking time and then contin-

uously checks to see if the overload condition is pre-

sent. The switch remains on after the overload condition

disappears and FLAG deasserts.

The MAX4795–MAX4798 are available in tiny, space-

saving, 5-pin SOT23 and 6-pin TDFN (3mm x 3mm)

packages.

Applications

SDIO

PDAs and Palmtop Devices

Cell Phones

GPS Systems

Hand-Held Devices

Features

o Guaranteed Current Limit: 450mA and 500mA

o Thermal-Shutdown Protection

o Reverse-Current Protection

o 0.2Ω On-Resistance

o 14ms Guaranteed Blanking Time

o FLAG Function

o Autoretry (MAX4796/MAX4798)

o 80µA Supply Current

o 6µA Latchoff Current

(MAX4795/MAX4797)

o 0.01µA Shutdown Current

o +2V to +4.5V Supply Range

o Fast Current-Limit Response Time

o Tiny SOT23 and TDFN Packages

o UL Certification Pending

450mA/500mA Current-Limit Switches

________________________________________________________________ Maxim Integrated Products

1

Ordering Information

+2.0V TO +4.5V

IN

OUT

FLAG

GND

ON

µP

TO SDIO PORT

MAX4795

MAX4796

MAX4797

MAX4798

Typical Operating Circuit

19-2944; Rev 0; 8/03

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.

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX4795EUK-T

-40°C to +85°C

5 SOT23-5

AEDI

MAX4795ETT*

40°C to +85°C

6 TDFN-EP**

—

MAX4796EUK-T

-40°C to +85°C

5 SOT23-5

AEDJ

MAX4796ETT*

-40°C to +85°C

6 TDFN-EP**

—

MAX4797EUK-T

-40°C to +85°C

5 SOT23-5

AEDK

MAX4797ETT*

-40°C to +85°C

6 TDFN-EP**

—

MAX4798EUK-T

-40°C to +85°C

5 SOT23-5

AEDL

MAX4798ETT*

-40°C to +85°C

6 TDFN-EP**

—

GND

FLAG

IN

MAX4795

MAX4796

MAX4797

MAX4798

SOT23

TOP VIEW

2

34

ON

OUT

FLAG

IN

MAX4795

MAX4796

MAX4797

MAX4798

TDFN

2

34

N.C.

Pin Configurations

*Future product—contact factory for availability.

**EP = Exposed pad.

Selector Guide appears at end of data sheet.