General Description

The MAX4881–MAX4884/MAX4893B overvoltage pro-

tection (OVP) controllers with built-in current-limited

switch, protect low-voltage systems against voltages of

up to 28V. When the input voltage exceeds the overvolt-

age trip level of 5.6V (MAX4881/MAX4883/MAX4893B) or

4.5V (MAX4882/MAX4884), the external n-channel MOS-

FET is turned off to prevent damage to the protected

components. An undervoltage/overvoltage flag indicator

(OV) notifies the processor that an undervoltage/overvolt-

age fault condition is present.

The MAX4881/MAX4882 feature an internal 1.1A

current-limited switch, while the MAX4883B/MAX4883C/

MAX4884B/MAX4884C include an internal 0.7A current-

limited switch. The MAX4893B includes a 0.9A current-

limited switch. When the load current is at the current

limit for longer than the blanking time, the switch of the

MAX4881/MAX4882/MAX4883B/MAX4884B/

MAX4893B latches off and does not turn back on until

EN, CB, or IN is cycled. A current-limit flag (FLAGI)

asserts to indicate a current fault condition.

The MAX4883C/MAX4884C limit the current to 0.7A

indefinitely until the thermal protection trips. An overcur-

rent flag output asserts to indicate a current fault condi-

tion after the blanking time has elapsed.

The MAX4881–MAX4884/MAX4893B have a control

input (CB) that is used to turn on and off the internal cur-

rent-limited switch. Other features include a shutdown

function (EN) to disable the external n-channel MOSFET,

and a built-in startup delay to allow the adapter voltage

to settle down before turning on the MOSFET.

The MAX4881–MAX4884/MAX4893B are offered in a

space-saving 10-pin TDFN package and operate over

the extended -40°C to +85°C temperature range.

Applications

Features

o Overvoltage Protection Up to 28V

o Preset Overvoltage Trip Level

5.6V (MAX4881/MAX4883/MAX4893B)

4.5V (MAX4882/MAX4884)

o Internal Current-Limited Switch

1.1A (MAX4881/MAX4882)

0.7A (MAX4883/MAX4884)

0.9A (MAX4893B)

o Drives Low-Cost n-Channel MOSFET

o Internal 50ms Startup Delay

o Overvoltage Fault OV Indicator

o Current-Limit Fault FLAGI Indicator

o Undervoltage Lockout

o Thermal Shutdown Protection

o Tiny 10-Pin TDFN Package

Overvoltage Protection Controllers with

Current Limit in TDFN

________________________________________________________________ Maxim Integrated Products

1

MAX4881

MAX4882

MAX4883

MAX4884

MAX4893B

3mm x 3mm TDFN

TOP VIEW

13

4

10

*EP

*CONNECT EXPOSED PAD TO GND.

87

2

9

5

6

+

Pin Configuration

Ordering Information

19-3777; Rev 2; 10/06

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

OV TRIP

LEVEL (V)

CURRENT

LIMIT (A)

CURRENT-LIMIT

MODE

TOP

MARK

PKG

CODE

MAX4881ETB

-40°C to +85°C

10 TDFN-EP*

5.6

1.1

LATCHOFF

APK

T1033-1

MAX4882ETB

-40°C to +85°C

10 TDFN-EP*

4.5

1.1

LATCHOFF

APL

T1033-1

MAX4883BETB

-40°C to +85°C

10 TDFN-EP*

5.6

0.7

LATCHOFF

APM

T1033-1

MAX4883CETB

-40°C to +85°C

10 TDFN-EP*

5.6

0.7

CONTINUOUS

APN

T1033-1

MAX4884BETB**

-40°C to +85°C

10 TDFN-EP*

4.5

0.7

LATCHOFF

APO

T1033-1

MAX4884CETB**

-40°C to +85°C

10 TDFN-EP*

4.5

0.7

CONTINUOUS

APP

T1033-1

MAX4893BETB

-40°C to +85°C

10 TDFN-EP*

5.6

0.9

LATCHOFF

ATF

T1033-1

Cell Phones

Digital Still Cameras

PDAs and Palmtop Devices

MP3 Players

* EP = Exposed pad.

**Future product—contact factory for availability.