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MAX4893BETB+T

P1-P3P4-P6P7-P9P10-P12P13-P13
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
♦ Overvoltage Protection Up to 28V
♦ Preset Overvoltage Trip Level
5.6V (MAX4881/MAX4883/MAX4893B)
4.5V (MAX4882/MAX4884)
♦ Internal Current-Limited Switch
1.1A (MAX4881/MAX4882)
0.7A (MAX4883/MAX4884)
0.9A (MAX4893B)
♦ 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/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
________________________________________________________________ Maxim Integrated Products 1
OV
FLAGI
GND
BTB
MAX4881
MAX4882
MAX4883
MAX4884
MAX4893B
N.C.
IN
GATE
BTA
EN
3mm x 3mm TDFN
TOP VIEW
CB
134
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
-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.
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +5V (MAX4881/MAX4883/MAX4893B), V
IN
= +4V (MAX4882/MAX4884), T
A
= -40°C to +85°C, unless otherwise noted. Typical
values are at T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
(All voltages referenced to GND.)
IN ............................................................................-0.3V to +30V
GATE ......................................................................-0.3V to +12V
EN,
CB, OV, FLAGI, BTA, BTB ................................-0.3V to +6V
Continuous Power Dissipation (T
A
= +70°C)
10-Pin TDFN (derate 18.5mW/°C above +70°C) .....1481.5mW
Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
INPUT VOLTAGE (IN)
Input Voltage Range V
IN
1.2
28.0
V
MAX4881/MAX4883/MAX4893B
5.5 5.6 5.7
Overvoltage Trip Level OVLO V
IN
rising
MAX4882/MAX4884 4.4 4.5 4.6
V
Overvoltage-Trip-Level
Hysteresis
50 mV
MAX4881/MAX4883/MAX4893B
4.2
4.35
4.5
Undervoltage Lockout Threshold
UVLO
V
IN
falling
MAX4882/MAX4884 2.4
2.55
2.7
V
Undervoltage Lockout Hysteresis
50 mV
Supply Current
I
IN
+ I
BTA
No load, V
EN
= 0 or 5.5V,
V
IN
= V
OVLO (MIN)
- 0.1V, V
CB
= V
IN
240
380 µA
INTERNAL SWITCH
BTA Input Range V
BTA
2.8 5.7 V
BTA Undervoltage Lockout
BTA
UVLO
V
BTA
falling 2.4 2.7 V
BTA-Undervoltage-Lockout
Hysteresis
50 mV
MAX4881/MAX4882, V
BTB
= GND
1.00
1.1
1.25
MAX4883/MAX4884, V
BTB
= GND
0.600
0.7
0.775
Switch-Forward Current Limit I
FWD
MAX4893B, V
BTB
= GND
0.800
1
A
MAX4881/MAX4882
1.25
MAX4883/MAX4884
0.775
Switch-Reverse Current Limit I
REV
MAX4893B 1
A
V
BTA
= 5V
( M AX 4881/M AX 4883/MAX4893B)
110
Voltage Drop (V
BTA
- V
BTB
)
I
L
= 400m A
V
BTA
= 4V
(MAX4882/MAX4884)
110
mV
Blanking Time t
BLANK
20 50 80 ms
BTB Off Current
I
BTB-OFF
V
EN
= 0, V
CB
= 0 1 µA
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
_______________________________________________________________________________________ 3
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
GATE
V
IN
= 5V
( M AX 4881/M AX 4883/MAX4893B)
910
GATE Voltage V
GATE
I
GATE
sourcing
1µA
V
IN
= 4.3V
(MAX4882/MAX4884)
7.6 8.6
V
GATE Pulldown Current I
PD
V
IN
> V
OVLO
, V
GATE
= 5.5V 60 mA
TIMING
Startup Delay t
START
V
IN
> V
UVLO
, V
GATE
> 0.3V (Figure 1) 20 50 80 ms
OV Blanking Time
t
OV-BLANK
V
GATE
= 0.3V, V
OV
= 2.4V (Figure 1) 20 50 80 ms
GATE Turn-On Time t
GON
V
GAT E
= 0.3V to 7V , C
GAT E
= 1500p F ( Fi g ur e 1)
7ms
V
IN
increasing from 5V to 8V at 3V/µs,
V
GATE
= 0.3V, C
GATE
= 1500pF (Figure 2)
(MAX4881/MAX4883/MAX4893B)
620
GATE Turn-Off Time t
GOFF
V
IN
increasing from 4V to 7V at 3V/µs,
V
GATE
= 0.3V, C
GATE
= 1500pF (Figure 2)
(MAX4882/MAX4884)
620
µs
V
IN
increasing from 5V to 8V at 3V/µs,
V
OV
= 0.4V (Figure 2)
(MAX4881/MAX4883/MAX4893B)
5.8
OV Assertion Delay t
OV
V
IN
increasing from 4V to 7V at 3V/µs,
V
OV
= 0.4V (Figure 2) (MAX4882/MAX4884)
5.8
µs
Initial Overvoltage Fault Delay t
OVP
V
IN
increasing from 0 to 8V,
I
GATE
= 80% of I
PD
(Figure 3)
100
ns
Disable Time t
DIS
V
EN
= 2.4V, V
GATE
= 0.3V (Figure 4)
580
ns
EN, CB INPUTS
Input-High Voltage V
IH
1.4 V
Input-Low Voltage V
IL
0.5 V
Input Leakage 1µA
OV, FLAGI OUTPUTS
Output Voltage Low V
OL
I
SINK
= 1mA, OV, FLAGI assert 0.4 V
Leakage Current V
FLAGI
= V
OV
= 5.5V 1 µA
THERMAL PROTECTION
Thermal Shutdown
150
°C
Thermal Hysteresis 40 °C
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +5V (MAX4881/MAX4883/MAX4893B), V
IN
= +4V (MAX4882/MAX4884), T
A
= -40°C to +85°C, unless otherwise noted. Typical
values are at T
A
= +25°C.) (Note 1)
Note 1: All devices are 100% tested at T
A
= +25°C. Electrical limits over the full temperature range are guaranteed by design.
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX4893BETB+T

Mfr. #:
Buy MAX4893BETB+T
Manufacturer:
Maxim Integrated
Description:
Current & Power Monitors & Regulators Overvoltage Protect Controller
Lifecycle:
New from this manufacturer.
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