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
(VIN = +5V (MAX4881/MAX4883/MAX4893B), VIN = +4V (MAX4882/MAX4884), TA= -40°C to +85°C, unless otherwise noted. Typical
values are at TA= +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 (TA= +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 VIN 1.2
28.0
V
MAX4881/MAX4883/MAX4893B
5.5 5.6 5.7
Overvoltage Trip Level OVLO VIN 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
VIN falling
MAX4882/MAX4884 2.4
2.55
2.7 V
Undervoltage Lockout Hysteresis
50 mV
Supply Current
IIN + IBTA
No load, VEN = 0 or 5.5V,
VIN = VOVLO (MIN) - 0.1V, VCB = VIN
240
380 µA
INTERNAL SWITCH
BTA Input Range VBTA 2.8 5.7 V
BTA Undervoltage Lockout
BTAUVLO
VBTA falling 2.4 2.7 V
BTA-Undervoltage-Lockout
Hysteresis 50 mV
MAX4881/MAX4882, VBTB = GND
1.00
1.1
1.25
MAX4883/MAX4884, VBTB = GND
0.600
0.7
0.775
Switch-Forward Current Limit IFWD
MAX4893B, VBTB = GND
0.800
1
A
MAX4881/MAX4882
1.25
MAX4883/MAX4884
0.775
Switch-Reverse Current Limit IREV
MAX4893B 1
A
VBTA = 5V
( M AX 4881/M AX 4883/MAX4893B)
110
Voltage Drop (VBTA - VBTB)
IL = 400m A
VBTA = 4V
(MAX4882/MAX4884) 110
mV
Blanking Time tBLANK 20 50 80 ms
BTB Off Current
IBTB-OFF
VEN = 0, VCB = 0 1 µA
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
_______________________________________________________________________________________ 3
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
GATE
VIN = 5V
( M AX 4881/M AX 4883/MAX4893B)
910
GATE Voltage VGATE
IGATE
sourcing
1µA VIN = 4.3V
(MAX4882/MAX4884) 7.6 8.6
V
GATE Pulldown Current IPD VIN > VOVLO, VGATE = 5.5V 60 mA
TIMING
Startup Delay tSTART VIN > VUVLO, VGATE > 0.3V (Figure 1) 20 50 80 ms
OV Blanking Time
tOV-BLANK
VGATE = 0.3V, VOV = 2.4V (Figure 1) 20 50 80 ms
GATE Turn-On Time tGON
V
GAT E
= 0.3V to 7V , C
GAT E
= 1500p F ( Fi g ur e 1)
7ms
VIN increasing from 5V to 8V at 3V/µs,
VGATE = 0.3V, CGATE = 1500pF (Figure 2)
(MAX4881/MAX4883/MAX4893B)
620
GATE Turn-Off Time tGOFF
VIN increasing from 4V to 7V at 3V/µs,
VGATE = 0.3V, CGATE = 1500pF (Figure 2)
(MAX4882/MAX4884)
620
µs
VIN increasing from 5V to 8V at 3V/µs,
VOV = 0.4V (Figure 2)
(MAX4881/MAX4883/MAX4893B)
5.8
OV Assertion Delay tOV
VIN increasing from 4V to 7V at 3V/µs,
VOV = 0.4V (Figure 2) (MAX4882/MAX4884)
5.8
µs
Initial Overvoltage Fault Delay tOVP VIN increasing from 0 to 8V,
IGATE = 80% of IPD (Figure 3)
100
ns
Disable Time tDIS VEN = 2.4V, VGATE = 0.3V (Figure 4)
580
ns
EN, CB INPUTS
Input-High Voltage VIH 1.4 V
Input-Low Voltage VIL 0.5 V
Input Leakage 1µA
OV, FLAGI OUTPUTS
Output Voltage Low VOL ISINK = 1mA, OV, FLAGI assert 0.4 V
Leakage Current VFLAGI = VOV = 5.5V 1 µA
THERMAL PROTECTION
Thermal Shutdown
150
°C
Thermal Hysteresis 40 °C
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +5V (MAX4881/MAX4883/MAX4893B), VIN = +4V (MAX4882/MAX4884), TA= -40°C to +85°C, unless otherwise noted. Typical
values are at TA= +25°C.) (Note 1)
Note 1: All devices are 100% tested at TA= +25°C. Electrical limits over the full temperature range are guaranteed by design.
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
4 _______________________________________________________________________________________
Typical Operating Characteristics
(VIN = 5V, TA= +25°C, unless otherwise noted.)
GATE VOLTAGE vs. INPUT VOLTAGE
(MAX4881)
INPUT VOLTAGE (V)
GATE VOLTAGE (V)
MAX4881 toc04
012345678
0
3
6
9
12
OVLO TRIP POINT
UVLO TRIP POINT
BTB OFF CURRENT vs. TEMPERATURE
TEMPERATURE (°C)
BTB OFF CURRENT (nA)
MAX4881 toc05
-40 -15 10 35 60 85
0.01
0.1
1
10
100
1000
VEN = 0
VCB = 0
VBTB = 5.5V
POWER-UP RESPONSE (MAX4884)
MAX4881 toc06
20ms/div
5V
10V
5V
0
0
5V
0
IN
GATE
BTA
OV
POWER-DOWN RESPONSE (MAX4884)
MAX4881 toc07
20ms/div
5V
0
5V
0
5V
0
IN
10V
GATE
0
BTA
OV
OVERVOLTAGE RESPONSE (MAX4884)
MAX4881 toc09
400ns/div
6V
3V
0
5V
0
IN
GATE
OV
20mA
IGATE
EN vs. GATE (MAX4884)
MAX4881 toc08
100µs/div
5V
0
10V
0
EN
GATE
IIN + IBTA CURRENT vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
IIN + IBTA CURRENT (µA)
MAX4881 toc01
0 5 10 15 20 25 30
0
50
100
150
200
250
300
350
400
VEN = 0
VCB = 5V
OVLO TRIP POINT
UVLO TRIP POINT
IIN + IBTA CURRENT vs. TEMPERATURE
TEMPERATURE (°C)
IIN + IBTA CURRENT (µA)
MAX4881 toc02
-40 -15 10 35 60 85
0
50
100
150
200
250
300
350
400
GATE VOLTAGE vs. INPUT VOLTAGE
(MAX4884)
INPUT VOLTAGE (V)
GATE VOLTAGE (V)
MAX4881 toc03
012345678
0
3
6
9
12
UVLO TRIP POINT
OVLO TRIP POINT
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
_______________________________________________________________________________________ 5
CURRENT LIMIT vs. TEMPERATURE
(MAX4884)
TEMPERATURE (°C)
CURRENT LIMIT (mA)
MAX4881 toc10
-40 -15 10 35 60 85
0
100
200
300
400
500
600
700
800
VIN = 4.4V
VBTB = 2.7V
VCB = 5V
CURRENT LIMIT vs. TEMPERATURE
(MAX4881)
TEMPERATURE (°C)
CURRENT LIMIT (A)
MAX4881 toc11
-40 -15 10 35 60 85
0
0.25
0.50
0.75
1.00
1.25
VIN = 5V
VBTB = 2.7V
VCB = 5V
CURRENT LIMIT vs. VBTB
(MAX4884)
VBTB (V)
CURRENT LIMIT (mA)
MAX4881 toc12
012345
0
100
200
300
400
500
600
700
800
VIN = 4.4V
VCB = 5V
CURRENT LIMIT vs. VBTB
(MAX4881)
VBTB (V)
CURRENT LIMIT (A)
MAX4881 toc13
012345
0
0.25
0.50
0.75
1.00
1.25
VIN = 5V
VCB = 5V
Typical Operating Characteristics (continued)
(VIN = 5V, TA= +25°C, unless otherwise noted.)
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
6 _______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1IN
Input. IN is the power input for the OVP charge pump. Bypass IN to GND with a 1µF or larger
capacitor.
2EN Active-Low Enable Input. Drive EN high to turn off the external MOSFET. Driving EN low activates
the OVP circuitry and turns on the external MOSFET.
3 GATE Gate Drive Output. GATE is the output of an on-chip OVP charge pump. When VUVLO < VIN <
VOVLO, GATE is driven high to turn on the external n-channel MOSFET.
4 BTA
Internal Current-Limited Switch Terminal. Connect BTA to the source of the external n-channel
MOSFET. BTA is the power input for the entire device (except the OVP charge pump). Bypass BTA
to GND with a 0.1µF capacitor as close to the device as possible for proper operation.
5CB
Active-Low Internal Current-Limited-Switch Control Input. Drive CB high to turn on the internal
switch, pull CB low to turn off the internal switch.
6 GND Ground
7 BTB Internal Current-Limited-Switch Output. Bypass BTB to GND with 0.1µF capacitor as close to the
device as possible.
8FLAGI Active-Low Open-Drain Internal Current-Limited Flag Output. FLAGI asserts low when the current
is at the limit for longer than the blanking time. FLAGI is disabled when EN goes high.
9 N.C. No Connection. Not internally connected.
10 OV Active-Low Open-Drain IN-Overvoltage Flag Output. OV goes low when an
undervoltage/overvoltage fault occurs at IN. OV is disabled when EN goes high.
—EP Exposed Pad. EP is internally connected to GND. Correct EP to a large ground plane to act as a
heat sink, but do not use EP as the only electrical ground connection.
Detailed Description
The MAX4881–MAX4884/MAX4893B provide up to
+28V overvoltage protection for low-voltage systems.
When the input voltage at IN exceeds the overvoltage
trip level (OVLO), the MAX4881–MAX4884/MAX4893B
turn off the low-cost external n-channel FET to prevent
damage to the protected components and issue an
overvoltage fault flag.
The MAX4881–MAX4884 feature a built-in current-limited
switch that limits the load current to 1.1A (MAX4881/
MAX4882), 0.7A (MAX4883B/MAX4883C/MAX4884B/
MAX4884C), and 0.9A (MAX4893B). When the load cur-
rent 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 or 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 indefinite-
ly until the thermal protection trips. An overcurrent flag
output asserts to indicate a current fault condition after
the blanking time has elapsed.
IN-Undervoltage Lockout (UVLO)
The MAX4881/MAX4883/MAX4893B have a fixed 4.35V
undervoltage lockout level (UVLO) while the
MAX4882/MAX4884 have a fixed UVLO of 2.55V. GATE
goes low when VIN is below VUVLO, turning off the
external n-channel FET.
IN-Overvoltage Lockout (OVLO)
The MAX4881/MAX4883/MAX4893B have a fixed 5.6V
overvoltage threshold (OVLO), while the MAX4882/
MAX4884 have a fixed OVLO of 4.5V. GATE goes low
when VIN is higher than VOVLO, turning off the external
n-channel FET.
Fault Flag Output (
OV
)
The OV output signals the host system that there is a fault
with the input voltage. OV asserts low in response to
either an overvoltage or undervoltage fault. OV stays low
for 50ms after GATE turns on, before deasserting high.
OV is an open-drain active-low output. Connect a
pullup resistor from OV to the logic I/O voltage of the
host system or to any voltage source up to 6V. Driving
EN high disables OV.
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
_______________________________________________________________________________________ 7
VIN
1.2V
VGATE
VUVLO
0.3V
tSTART
2.4V
t0V-BLANK
8V
tGON
VOV
5V
Figure 1. Startup Timing Diagram
VIN
VGATE
VOVLO
0.3V
tGOFF
0.4V
tOV
4V/5V
7V/8V
VOV
Figure 2. Shutdown Timing Diagram
VIN
IGATE
VOVLO
80%
tOVP
0V
Figure 3. Power-Up Overvoltage Timing Diagram
VGATE
0.3V
tDIS
2.4V
VEN
Figure 4. Disable Timing Diagram
MAX4881–MAX4884/MAX4893B
Overcurrent Flag Output (
FLAGI
)
The MAX4881–MAX4884/MAX4893B have an overcur-
rent-fault flag output (FLAGI) to indicate a current fault
condition. FLAGI asserts low to indicate a fault when the
current reaches the current limit for longer than the 50ms
blanking time. Toggle IN or CB or EN to release FLAGI
latched condition. FLAGI does not assert if the current-
limit fault occurs for less than the blanking time (Figure 5).
FLAGI is disabled when EN goes high. When CB is low,
the switch opens, but FLAGI is not active.
FLAGI is an open-drain active-low output. Connect a
pullup resistor from FLAGI to the logic I/O voltage of the
host system or to any voltage source up to 6V.
Current-Limit Switch
When the forward- or reverse-current-limit threshold is
exceeded, tBLANK timer begins counting. The timer
Overvoltage Protection Controllers with
Current Limit in TDFN
8 _______________________________________________________________________________________
LOAD
CURRENT
SWITCH
STATUS OFF
CURRENT
LIMIT
ON
FLAGI
LOAD
CURRENT
SWITCH
STATUS
tBLANK tBLANK
tBLANK tBLANK
CURRENT
LIMIT
ON
(b) MAX4883C/MAX4884C
(a) MAX4881/MAX4882/MAX4883B/MAX4884B/MAX4893B
FLAGI
Figure 5. Current-Limit Fault Timing
LOAD
CURRENT
SWITCH
STATUS
tBLANK tBLANK
OFF
ON
EN
STATUS
(a)
FLAGI
PIN STATUS
LOAD
CURRENT
SWITCH
STATUS
tBLANK tBLANK
OFF
ON
(b)
FLAGI
CB
STATUS
(c)
UVLO
LOAD
CURRENT
SWITCH
STATUS OFF
ON
FLAGI
tBLANK tBLANK
STATUS
IN
STATUS
STATUS
Figure 6. Latchoff Fault Blanking (MAX4881/MAX4882/
MAX4883B/MAX4884B/MAX4893B
resets if the overcurrent condition disappears before
tBLANK has elapsed. The internal switch is latched off if
the overcurrent condition continues up to the end of the
blanking time (MAX4881/MAX4882/MAX4883B/
MAX4884B/MAX4893B). The MAX4883C/MAX4884C limit
the current infinitely until the thermal trip point occurs.
Reset the switch by toggling EN or CB or IN (Figure 6).
EN
Input
The MAX4881–MAX4884/MAX4893B feature an active-
low enable input (EN). Drive EN low or connect to
ground for normal operation. Drive EN high to force the
external n-channel MOSFET off, and to disable OV and
FLAGI.
GATE Driver
An on-chip charge pump drives the GATE voltage to
about twice above VIN, allowing the use of a low-cost
n-channel MOSFET (Figure 7). The actual GATE output
voltage tracks approximately 2 x VIN until VIN exceeds
the OVLO trip level, 5.6V (MAX4881/MAX4883/
MAX4893B) and 4.5V (MAX4882/MAX4884) typically.
The GATE output voltage, as a function of input volt-
age, is shown in the Typical Operating Characteristics.
Applications Information
MOSFET Selection
The MAX4881–MAX4884/MAX4893B are designed for
use with an n-channel MOSFET. MOSFETs with RDS(ON),
specified for a VGS of 4.5V or less, work well. If the input
supply is near the UVLO minimum of 4.2V (MAX4881/
MAX4883/MAX4893B), or of 2.4V (MAX4882/ MAX4884),
consider using a MOSFET specified for a lower VGS volt-
age. Also, the VDS should be 30V for the MOSFET to
withstand the full 28V IN range of the MAX4881–
MAX4884/MAX4893B. Table 1 shows a selection of
MOSFETs appropriate for use with the MAX4881–
MAX4884/MAX4893B.
IN Bypass Considerations
Bypass IN to GND with a 1µF ceramic capacitor to
achieve 15kV ESD-protected input. When the power
source has significant inductance due to long lead
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
_______________________________________________________________________________________ 9
IN
OVLO
UVLO
CHARGE PUMP
IN
OV
FLAGI
EN
CHARGE
PUMP
GND
1.1A/0.7A
LIMIT
IREF
BTA
UVLO
BTA
BTB
CB
MAX4881/MAX4882
MAX4883B/MAX4884B
MAX4893B
BLANKING TIME
AND LATCHOFF LOGIC
GATE
Figure 7a. MAX4881/MAX4882/MAX4883B/MAX4884B/
MAX4893B Functional Diagram
IN
OVLO
UVLO
CHARGE PUMP
GATE
IN
OV
FLAGI
EN
CHARGE
PUMP
GND
1.1A/0.7A
LIMIT
IREF
BTA
UVLO
BTA
BTB
CB
MAX4883C/MAX4884C
BLANKING TIME
LOGIC
Figure 7b. MAX4883C/MAX4884C Functional Diagram
length, take care to prevent overshoots due to the LC
tank circuit, and provide protection if necessary to pre-
vent exceeding the 30V absolute maximum rating on IN.
The MAX4881–MAX4884/MAX4893B provide protection
against voltage faults up to 28V, but this does not
include negative voltages. If negative voltages are a
concern, connect a Schottky diode from IN to GND to
clamp negative input voltages.
Exposed Pad
The MAX4881–MAX4884/MAX4893B provide an
exposed pad on the bottom of the package. This pad is
internally connected to GND. For the best thermal con-
ductivity and higher power dissipation, solder the
exposed pad to the ground plane. Do not use the
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
10 ______________________________________________________________________________________
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
150pF
RC
50Ω to 100Ω
RD
330Ω
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 10. IEC 61000-4-2 ESD Test Model
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
RC
1MΩ
RD
1.5kΩ
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 8. Human Body ESD Test Model
IP 100%
90%
36.8%
tRL TIME
tDL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Ir
10%
0
0
AMPERES
Figure 9. Human Body Model Current Waveform
tr = 0.7ns to 1ns
30ns
60ns
t
100%
90%
10%
IPEAK
I
Figure 11. IEC 61000-4-2 ESD Generator Current
PART
CONFIGURATION/
PACKAGE
VDS
MAX (V)
RON
AT 4.5V (mΩ)
MANUFACTURER
Si1426DH Single/SC70-6 30 115
Vishay Siliconix
http://www.vishay.com
(402) 563-6866
FDG315N Single/SC70-6 30 160
Fairchild Semiconductor
http://www.fairchildsemi.com
(207) 775-8100
Table 1. MOSFET Suggestions
ground-connected pad as the only electrical ground
connection or ground return. Use GND (pin 6) as the
only electrical ground connection.
ESD Test Conditions
ESD performance depends on a number of conditions.
The MAX4881–MAX4884/MAX4893B is specified for
15kV typical ESD resistance on IN when IN is bypassed
to ground with a 1µF low-ESR ceramic capacitor.
Contact Maxim for a reliability report that documents
test setup, methodology, and results.
Human Body Model
Figure 8 shows the Human Body Model and Figure 9
shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
a 100pF capacitor charged to the ESD voltage of inter-
est, which is then discharged into the device through a
1.5kΩresistor.
IEC 61000-4-2
Since January 1996, all equipment manufactured
and/or sold in the European community has been
required to meet the stringent IEC 61000-4-2 specifica-
tion. The IEC 61000-4-2 standard covers ESD testing
and performance of finished equipment; it does not
specifically refer to integrated circuits. The
MAX4881–MAX4884/MAX4893B help users design
equipment that meets Level 3 of IEC 61000-4-2, without
additional ESD-protection components.
The main difference between tests done using the
Human Body Model and IEC 61000-4-2 is higher peak
current in IEC 61000-4-2. Because series resistance is
lower in the IEC 61000-4-2 ESD test model (Figure 10),
the ESD-withstand voltage measured to this standard is
generally lower than that measured using the Human
Body Model. Figure 11 shows the current waveform for
the ±8kV, IEC 61000-4-2, Level 4, ESD Contact
Discharge test. The Air-Gap test involves approaching
the device with a charger probe. The Contact
Discharge method connects the probe to the device
before the probe is energized.
Typical Operating Circuits
Figures 12 and 13 depict some typical connections to
the MAX4881–MAX4884/MAX4893B. Figure 12 shows a
battery charger application where the source power is
an 4.4V adapter with a built-in charger, while Figure 13
shows an application where the battery charger is
external.
Chip Information
TRANSISTOR COUNT: 2391
PROCESS: BiCMOS
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
______________________________________________________________________________________ 11
AC-DC
ADAPTER
5.25V
GATEIN
FLAGI
OV
Li+
BTB
BTA
1.1A/0.9A/0.7A
CB
EN GND
LOAD
VIO
MAX4881/
MAX4883/
MAX4893B
BATTERY
CHARGER
Figure 13. Connection to an AC-DC Adapter with a Built-In
Battery Charger
4.4V ADAPTER
WITH BUILT-IN
CHARGER
GATEIN
FLAGI
OV
Li+
BTB
BTA
1.1A/0.7A
CB
EN GND
LOAD
VIO
MAX4882/
MAX4884
Figure 12. Connection to an AC-DC Adapter without a Built-In
Battery Charger
6, 8, &10L, DFN THIN.EPS
H
1
2
21-0137
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
12 ______________________________________________________________________________________
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
MAX4881–MAX4884/MAX4893B
Overvoltage Protection Controllers with
Current Limit in TDFN
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13
© 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
COMMON DIMENSIONS
SYMBOL MIN. MAX.
A 0.70 0.80
D 2.90 3.10
E 2.90 3.10
A1 0.00 0.05
L 0.20 0.40
PKG. CODE N D2 E2 eJEDEC SPEC b[(N/2)-1] x e
PACKAGE VARIATIONS
0.25 MIN.k
A2 0.20 REF.
2.30–0.101.50–0.106T633-1 0.95 BSC MO229 / WEEA 1.90 REF0.40–0.05
1.95 REF0.30–0.050.65 BSC2.30–0.108T833-1
2.00 REF0.25–0.050.50 BSC2.30–0.1010T1033-1
2.40 REF0.20–0.05- - - - 0.40 BSC1.70–0.10 2.30–0.1014T1433-1
1.50–0.10
1.50–0.10
MO229 / WEEC
MO229 / WEED-3
0.40 BSC - - - - 0.20–0.05 2.40 REFT1433-2 14 2.30–0.101.70–0.10
T633-2 6 1.50–0.10 2.30–0.10 0.95 BSC MO229 / WEEA 0.40–0.05 1.90 REF
T833-2 8 1.50–0.10 2.30–0.10 0.65 BSC MO229 / WEEC 0.30–0.05 1.95 REF
T833-3 8 1.50–0.10 2.30–0.10 0.65 BSC MO229 / WEEC 0.30–0.05 1.95 REF
-DRAWING NOT TO SCALE-
H
2
2
21-0137
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
2.30–0.10 MO229 / WEED-3 2.00 REF0.25–0.05
0.50 BSC
1.50–0.1010T1033-2
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MAX4881, MAX4882, MAX4883, MAX4884, MAX4893B
Overvoltage Protection Controllers with C urrent Limit in TDFN
Overvoltage trip level, saves space
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2.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data
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* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses.4.
Devices: 1-10 of 10
MAX4881
Free
Sam ple
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free?
Materials Analysis
MAX4881ETB
THIN QFN (Dual);10 pin;10 mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1033-1*
-40C to +85C
RoHS/Lead-Free: No
Materials Analysis
MAX4881ETB-T
THIN QFN (Dual);10 pin;10 mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1033-1*
-40C to +85C
RoHS/Lead-Free: No
Materials Analysis
MAX4882
Free
Sam ple
Buy
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free?
Materials Analysis
MAX4882ETB
THIN QFN (Dual);10 pin;10 mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1033-1*
-40C to +85C
RoHS/Lead-Free: No
Materials Analysis
MAX4882ETB-T
THIN QFN (Dual);10 pin;10 mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1033-1*
-40C to +85C
RoHS/Lead-Free: No
Materials Analysis
MAX4883
Free
Sam ple
Buy
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free?
Materials Analysis
MAX4883BETB
THIN QFN (Dual);10 pin;10 mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1033-1*
-40C to +85C
RoHS/Lead-Free: No
Materials Analysis
MAX4883CETB
THIN QFN (Dual);10 pin;10 mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1033-1*
-40C to +85C
RoHS/Lead-Free: See data sheet
Materials Analysis
MAX4883CETB-T
THIN QFN (Dual);10 pin;10 mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1033-1*
-40C to +85C
RoHS/Lead-Free: See data sheet
Materials Analysis
MAX4883BETB-T
THIN QFN (Dual);10 pin;10 mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1033-1*
-40C to +85C
RoHS/Lead-Free: No
Materials Analysis
MAX4893B
Free
Sam ple
Buy
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free?
Materials Analysis
MAX4893BETB+
THIN QFN (Dual);10 pin;10 mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1033+1*
-40C to +85C
RoHS/Lead-Free: Lead Free
Materials Analysis
MAX4893BETB+T
THIN QFN (Dual);10 pin;10 mm
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T1033+1*
-40C to +85C
RoHS/Lead-Free: Lead Free
Materials Analysis
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Document Ref.: 1 9 -3777; Rev 2; 2006-11-08
This page last modified: 200 7 -08-29
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