General Description

The MAX4826–MAX4831 family of switches has internal

current limiting to prevent host devices from being

damaged due to faulty load conditions. These analog

switches have a low 0.7

Ω on-resistance and operate

from a +2.3V to +5.5V input voltage range. These

devices are available with guaranteed 50mA and

100mA current limits, making them ideal for load-

switching applications. In addition to the current-limit

fault flag (FFLG), an open-drain no-load flag indicator

(NOLD) notifies the system when the current through

the switch is less than 10mA (MAX4826–MAX4829), or

5mA (MAX4830/MAX4831).

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 MAX4826/MAX4828/MAX4830 enter a latchoff state

where the switch is turned off, and FFLG is issued to

the microprocessor. The switch can be turned on again

by cycling the power or ON.

The MAX4827/MAX4829/MAX4831 have an autoretry

feature where the switch turns off after the blanking

time, and then continuously checks to see if the over-

load condition is present. The current-limit fault flag

(FFLG) is issued and remains low until after the fault

condition is removed. The switch remains on after the

overload condition disappears.

The MAX4826–MAX4831 operate over the extended

-40°C to +85°C temperature range, and are available in a

tiny space-saving, 1mm x 1.5mm, 6-pin µDFN package.

Features

♦ Guaranteed Current Limit: 50mA, 100mA

♦ Thermal Shutdown Protection

♦ Reverse-Current Protection

♦ 0.7Ω On-Resistance (MAX4826–MAX4831)

♦ 14ms Guaranteed Blanking Time

♦ Fault Flag (FFLG)

♦ No-Load Flag (NOLD)

♦ 65µA Supply Current

♦ 8µA Latchoff Current

♦ 0.01µA Shutdown Current

♦ +2.3V to +5.5V Supply Range

♦ Undervoltage Lockout

♦ Fast Current-Limit Response Time

♦ 6-Pin µDFN Package (1mm x 1.5mm)

Applications

GPS Systems

Cell Phones

Digital Still Cameras

PDAs and Palmtop Devices

MP3 Players

50mA/100mA Current-Limit Switches with

NO-LOAD Flag in µDFN

________________________________________________________________

Maxim Integrated Products

1

Ordering Information/Selector Guide

19-3672; Rev 1; 8/09

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.

PART

PIN-PACKAGE

MIN FULL-LOAD

LIMIT

(mA)

MAX NO-LOAD

LIMIT

(mA)

ON-RESISTANCE

( )

MODE

TOP

MARK

MAX4826ELT+T

6 μDFN

50

10

1

Latchoff

AK

MAX4827ELT+T*

6 μDFN

50

10

1

Autoretry

AL

MAX4828ELT+T*

6 μDFN

100

10

1

Latchoff

AM

MAX4829ELT+T

6 μDFN

100

10

1

Autoretry

AN

MAX4830ELT+T

6 μDFN

50

5

2

Latchoff

AO

MAX4830ELT/V+T

6 μDFN

50

5

2

Latchoff

OX

MAX4831ELT+T*

6 μDFN

50

5

2

Autoretry

AP

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

T = Tape and reel.

*Future product—contact factory for availability.

/V denotes an automotive qualified part.

Pin Configuration appears at end of data sheet.