Rainbow-electronics MAX4884 User Manual

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General Description
The MAX4881–MAX4884 overvoltage protection (OVP)
controllers with built-in current-limited switch, protect low-
voltage systems against voltages of up to 28V. When the
input voltage exceeds the overvoltage trip level of 5.6V
(MAX4881/MAX4883) or 4.5V (MAX4882/MAX4884), the
external n-channel MOSFET is turned off to prevent dam-
age to the protected components. An undervoltage/over-
voltage flag indicator (OV) notifies the processor that an
undervoltage/overvoltage fault condition is present.
The MAX4881/MAX4882 feature an internal 1.1A cur-
rent-limited switch, while the MAX4883B/MAX4883C/
MAX4884B/MAX4884C include an internal 0.7A 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 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 have a control input (CB) that
is used to turn on and off the internal current-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 is offered in a space-saving
10-pin TDFN package and is specified for operation
over the extended -40°C to +85°C temperature range.
Applications
Features
Overvoltage Protection Up to 28V
Preset Overvoltage Trip Level
5.6V (MAX4881/MAX4883)
4.5V (MAX4882/MAX4884)
Internal Current-Limited Switch
1.1A (MAX4881/MAX4882)
0.7A (MAX4883/MAX4884)
Drives Low-Cost n-Channel MOSFET
Internal 50ms Startup Delay
Overvoltage Fault OV Indicator
Current-Limit Fault FLAGI Indicator
Undervoltage Lockout
Thermal Shutdown Protection
Tiny 10-Pin TDFN Package
MAX4881–MAX4884
Overvoltage Protection Controllers with
Current Limit in TDFN
________________________________________________________________ Maxim Integrated Products 1
OV
FLAGI
GND
BTB
MAX4881
MAX4882
MAX4883
MAX4884
N.C.
IN
GATE
BTA
EN
3mm x 3mm TDFN
TOP VIEW
CB
134
10 8 7
2
9
5
6
Pin Configuration
Ordering Information
19-3777; Rev 0; 7/05
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
MAX4881ETB -40°C to +85°C 10 TDFN-EP* 5.6 1.1 LATCH-OFF APK
MAX4882ETB -40°C to +85°C 10 TDFN-EP* 4.5 1.1 LATCH-OFF APL
MAX4883BETB -40°C to +85°C 10 TDFN-EP* 5.6 0.7 LATCH-OFF APM
MAX4883CETB** -40°C to +85°C 10 TDFN-EP* 5.6 0.7 CONTINUOUS APN
MAX4884BETB** -40°C to +85°C 10 TDFN-EP* 4.5 0.7 LATCH-OFF APO
MAX4884CETB** -40°C to +85°C 10 TDFN-EP* 4.5 0.7 CONTINUOUS APP
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 Players
* EP = Exposed pad
**Future product—contact factory for availability.
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Summary of Contents

Page 1 - Current Limit in TDFN

General DescriptionThe MAX4881–MAX4884 overvoltage protection (OVP)controllers with built-in current-limited switch, protect low-voltage systems again

Page 2

source has significant inductance due to long leadlength, take care to prevent overshoots due to the LCtank circuit, and provide protection if necessa

Page 3

electrical ground connection or ground return. Use GND(pin 6) as the only electrical ground connection.ESD Test ConditionsESD performance depends on a

Page 4

MAX4881–MAX4884Overvoltage Protection Controllers withCurrent Limit in TDFNMaxim cannot assume responsibility for use of any circuitry other than circ

Page 5

MAX4881–MAX4884Overvoltage Protection Controllers withCurrent Limit in TDFN2 _________________________________________________________________________

Page 6

MAX4881–MAX4884Overvoltage Protection Controllers withCurrent Limit in TDFN___________________________________________________________________________

Page 7

MAX4881–MAX4884Overvoltage Protection Controllers withCurrent Limit in TDFN4 _________________________________________________________________________

Page 8

MAX4881–MAX4884Overvoltage Protection Controllers withCurrent Limit in TDFN___________________________________________________________________________

Page 9

MAX4881–MAX4884Overvoltage Protection Controllers withCurrent Limit in TDFN6 _________________________________________________________________________

Page 10

Detailed DescriptionThe MAX4881–MAX4884 provide up to +28V overvolt-age protection for low-voltage systems. When the inputvoltage at IN exceeds the ov

Page 11

MAX4881–MAX4884Overcurrent Flag Output (FLAGI)The MAX4881–MAX4884 have an overcurrent-fault flagoutput (FLAGI) to indicate a current fault condition.F

Page 12 - Package Information

Current-Limit SwitchWhen the forward- or reverse-current-limit threshold isexceeded, tBLANKtimer begins counting. The timerresets if the overcurrent c

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