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 0.7Ωon-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
♦0.7ΩOn-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
MAX4826–MAX4831
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
()
TA = +25°C
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.
MAX4826–MAX4831
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
IN, ON, FFLG, NOLD, OUT to GND .........................-0.3V to +6V
OUT Short Circuit to GND .................................Internally Limited
Continuous Power Dissipation (TA= +70°C)
6-Pin µDFN (derate 2.1mW/°C above +70°C) .............168mW
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
ELECTRICAL CHARACTERISTICS
(VIN = +2.3V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VIN = +3.3V, TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage VIN 2.3 5.5 V
VIN = +2.3V to +5.0V 65 100
Quiescent Current IQVON = VIN, IOUT =
0, switch on VIN = +5.0V to +5.5V 120 µA
Latchoff Current (Note 2) ILATCH VON = VIN = 3.3V, after an overcurrent fault
(MAX4826/MAX4828/MAX4830) 815µA
Shutdown Current ISHDN VON = 0, IOUT = 0mA 0.01 1 µA
Shutdown Reverse Leakage ISHDNRV VON = 0, VIN = +2.3V, VOUT = +5.5V 0.01 1 µA
(MAX4826/MAX4827/MAX4830/MAX4831)
RL = 10Ω50 120
Forward-Current Limit IFWD
(MAX4828/MAX4829) RL = 5Ω100 240
mA
VOUT - VIN < 0.5V
(MAX4826/MAX4827/MAX4830/MAX4831) 120
Reverse-Current Limit IREV
VOUT - VIN < 0.5V (MAX4828/MAX4829) 240
mA
MAX4826–MAX4829 1.0 10.0
No-Load Threshold INLTH MAX4830/MAX4831 0.5 5.0 mA
ON Input Leakage IONLK VON = VIN or GND -1 +1 µA
Off-Switch Leakage ISWLK VIN = +5.5V, VON = 0, VOUT = 0 0.01 1 µA
Undervoltage Lockout UVLO Rising edge 1.8 2.2 V
Undervoltage Lockout Hysteresis UVLOHYS 100 mV
(MAX4826–MAX4829) 0.7 1.0
TA = +25°C, IOUT
= 20mA (MAX4830/MAX4831) 1.4 2.0
(MAX4826–MAX4829) 1.3
On-Resistance RON TA = -40°C to
+85°C,
IOUT = 20mA (MAX4830/MAX4831) 2.6
Ω
ON Input-Logic-High Voltage VIH 2.0 V
ON Input-Logic-Low Voltage VIL 0.8 V
FFLG, NOLD Output-Logic-Low
Voltage ISINK = 1mA 0.4 V
MAX4826–MAX4831
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +2.3V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VIN = +3.3V, TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
FFLG, NOLD Output-High
Leakage Current VIN = VFFLG = VNOLD = +5.5V 1 µA
Thermal Shutdown +150 °C
Thermal-Shutdown Hysterisis 15 °C
DYNAMIC
Turn-On Time ON from low to high; IOUT = 10mA,
CL = 0.1µF (Note 3) 50 µs
Turn-Off Time ON from high to low; IOUT =10mA,
CL = 0.1µF (Note 3) 30 ns
Blanking Time tBLANK Overcurrent fault 14 60 ms
Short-Circuit Current-Limit
Response Time
VON = VIN = +3.3V, short circuit applied to
OUT 5µs
No-Load-Detection Response
Time
IOUT falling step signal from 15mA to 0mA,
CL = 0.1µF 60 µs
Retry Time tRETRY Overcurrent fault (Figure 2) (Note 4) 196 840 ms
Note 1: All parts are 100% tested at TA= +25°C. Limits at TA= -40°C to +85°C are guaranteed by design.
Note 2: Latchoff current does not include the current flowing into FFLG and NOLD.
Note 3: Turn-on time is defined as the time taken for the current through the switch to go from 0mA to full load. Turn-off time is
defined as the time taken for the current through the switch to go from full load to 0mA.
Note 4: Retry time is typically 14x the blanking time.
Typical Operating Characteristics
(VIN = +3.3V, TA = +25°C, unless otherwise noted.)
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4826 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (μA)
5.14.73.9 4.33.1 3.52.7
10
20
30
40
50
60
70
80
90
0
2.3 5.5
VON = VIN
VIN = +2.3V TO +5.5V
TEMPERATURE (°C)
60
3510-15-40 85
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX4826 toc02
SUPPLY CURRENT (μA)
10
20
30
40
50
60
70
80
90
0
VON = VIN
VIN = 5V
VIN = 3.3V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
TEMPERATURE (°C)
603510-15-40 85
LATCHOFF CURRENT
vs. TEMPERATURE
MAX4826 toc03
LATCHOFF CURRENT (μA)
VIN = 5V
VIN = 3.3V
VON = VIN
MAX4826–MAX4831
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
4 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(VIN = +3.3V, TA = +25°C, unless otherwise noted.)
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX4826 toc04
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT (nA)
0.001
0.01
0.1
1
10
0.0001
VIN = 5V
VIN = 3.3V
603510-15-40 85
SHUTDOWN LEAKAGE CURRENT
vs. TEMPERATURE
MAX4826 toc05
TEMPERATURE (°C)
SHUTDOWN LEAKAGE CURRENT (nA)
0.001
0.01
0.1
1
10
0.0001
VIN = 5V
VIN = 3.3V
603510-15-40 85
SHUTDOWN REVERSE LEAKAGE CURRENT
vs. TEMPERATURE
MAX4826 toc06
TEMPERATURE (°C)
REVERSE LEAKAGE CURRENT (nA)
0.001
0.01
0.1
1
10
0.0001
603510-15-40 85
VON = VIN = OV
VOUT = 5V
LATCHOFF-LEAKAGE CURRENT
vs. TEMPERATURE
MAX4826 toc07
TEMPERATURE (°C)
LATCHOFF-LEAKAGE CURRENT (nA)
0.001
0.01
0.1
1
10
0.0001
VIN = 5V
VIN = 3.3V
603510-15-40 85
TEMPERATURE (°C)
60
3510-15-40 85
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
MAX4826 toc08
NORMALIZED RON
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
VON = VIN = 3.3V
0
100
50
200
150
250
300
0 0.6 0.9 1.20.3 1.5 1.8 2.1 2.4 2.7 3.0 3.3
OUTPUT CURRENT vs. OUTPUT VOLTAGE
MAX4826 toc09
VIN - VOUT (V)
OUTPUT CURRENT (mA)
MAX4828/MAX4829
MAX4826/MAX4827/MAX4830/MAX4831
SWITCH TURN-ON/OFF TIMES
vs. TEMPERATURE
MAX4826 toc10
TEMPERATURE (°C)
TURN-ON/OFF TIMES (μs)
0.01
0.1
1
10
100
0.001
603510-15-40 85
ILOAD = -10mA
ON
OFF
VIN = 3.3V VIN = 5V
FFLG-BLANKING TIMEOUT
vs. TEMPERATURE
FFLG-BLANKING TIME (ms)
15
20
25
30
35
40
10
MAX4826 toc11
TEMPERATURE (°C)
603510-15-40 85
MAX4826–MAX4831
Typical Operating Characteristics (continued)
(VIN = +3.3V, TA = +25°C, unless otherwise noted.)
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
_______________________________________________________________________________________
5
CURRENT-LIMIT RESPONSE
MAX4826 toc12
40μs/div
VON = 3.3V
VOUT = GND
CIN = 1μF
COUT = 1μF
VIN
2V/div
VON
2V/div
IOUT
100mA/div
CURRENT-LIMIT RESPONSE
(OUT SHORTED TO GND)
MAX4826 toc14
40μs/div
VIN
2V/div
VOUT
2V/div
IOUT
2A/div
CURRENT-LIMIT RESPONSE
MAX4826 toc13
20μs/div
VON = 3.3V
VOUT = GND
CIN = 1μF
COUT = 1μF
VIN = VON
1V/div
IOUT
100mA/div
SWITCH TURN-ON-TIME RESPONSE
MAX4826 toc15
100μs/div
VIN = 3.3V
ILOAD = 10mA
VON
2V/div
IOUT
100mA/div
SWITCH TURN-OFF-TIME RESPONSE
MAX4826 toc16
100ns/div
VON
2V/div
IOUT
10mA/div
VIN = 3.3V
ILOAD = 10mA
FFLG-BLANKING RESPONSE
MAX4826 toc17
4ms/div
VIN
2V/div
VON
2V/div
IOUT
100mA/div
FFLG
2V/div
MAX4826–MAX4831
Detailed Description
The MAX4826–MAX4831 are forward-/reverse-current-
limited switches that operate from a +2.3V to +5.5V
input voltage range and guarantee a 50mA and 100mA
minimum current-limit threshold for different options.
The voltage drop across an internal sense resistor is
compared to two reference voltages to indicate a for-
ward- or reverse-current-limit fault. When the load cur-
rent exceeds the preset current limit for greater than
the fault-blanking time, the switch opens.
The MAX4827/MAX4829/MAX4831 have an autoretry
function that turns on the switch again after an internal
retry time expires. If the faulty load condition is still pre-
sent after the blanking time, the switch turns off again
and the cycle is repeated. If the faulty load condition is
not present, the switch remains on.
The MAX4826/MAX4828/MAX4830 do not have the
autoretry option, and the switch remains in latchoff mode
until ON or the input power is cycled from high to low
and then high again.
The undervoltage lockout (UVLO) circuit prevents erro-
neous switch operation when the input voltage goes too
low during startup conditions.
Reverse-Current Protection
The MAX4826–MAX4831 limit the reverse current (VOUT
to VIN) from exceeding the maximum IREV value. The
switch is shut off and FFLG is asserted if the reverse-
current-limit condition persists for more than the blank-
ing time. This feature prevents excessive reverse cur-
rents from flowing through the device.
Switch-On/Off Control
Toggle ON high to enable the current-limited switches.
The switches are continuously on only if VIN exceeds
the UVLO threshold (typically 2V) and there is no fault.
When a forward-/reverse-current fault is present or the
die exceeds the thermal-shutdown temperature of
+150°C, OUT is internally disconnected from IN, and
the supply current decreases to 8µA (latchoff). The
switch is now operating in one of its off states. The
switch off state also occurs when driving ON low, thus
reducing the supply current (shutdown) to 0.01µA.
Table 1 illustrates the ON/OFF state of the MAX4826–
MAX4831 current-limit switches.
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
6 _______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1 IN Input. Bypass IN with a 0.1µF ceramic capacitor to ground.
2 GND Ground
3 OUT Switch Output. Bypass OUT with a 0.1µF capacitor to ground
4FFLG
Current-Limit Fault Output. FFLG is an open-drain output. FFLG goes low when the device stays in
forward- or reverse-current limit for more than the blanking time period. FFLG is high impedance
when a fault is not present or when ON is low.
5NOLD
No-Load Flag Output. NOLD is an open-drain output. NOLD goes low when a load of less than 10mA
(MAX4826–MAX4829) or 5mA (MAX4830/MAX4831) is delivered to the output. NOLD is high
impedance when a fault is not present or when ON is low.
6 ON Active-High Switch-On Input. Drive ON high to turn the switch on.
ON FAULT SWITCH ON/OFF SUPPLY CURRENT MODE
Low X OFF Shutdown
High Undervoltage lockout OFF Latchoff
High Thermal OFF immediately (tBLANK period does not apply). Latchoff
OFF after tBLANK period has elapsed. Latchoff
High Current limit
ON during tBLANK period, OFF during tRETRY period for the
MAX4827/MAX4829/MAX4831. Cycle repeats until fault is
removed.
See the Autoretry (MAX4827/
MAX4829/MAX4831) section
Table 1. MAX4826–MAX4831 Switch Truth Table
FFLG
Indicator
The MAX4826–MAX4831 feature a current-limit fault
output, FFLG. Whenever a current-limit fault is activat-
ed, FFLG goes low and the switch turns off. FFLG is an
open-drain output transistor and requires an external
pullup resistor from FFLG to IN. During shutdown (ON
is low), the pulldown on the FFLG output is released to
limit power dissipation. FFLG goes low when any of the
following conditions occur:
• The die temperature exceeds the thermal shut-
down temperature limit of +150°C.
• The device is in current limit for more than the
fault-blanking period.
• VIN is below the UVLO threshold.
NOLD
Indicator
The MAX4826–MAX4831 feature a no-load flag output,
NOLD (Figure 1). This output is pulled low every time
the current coming out of the switch is less than 10mA
(MAX4826–MAX4829), or 5mA (MAX4830/MAX4831).
NOLD is an open-drain output transistor and requires
an external pullup resistor from NOLD to a supply up to
+5.5V. Current through the switch is intended to be
positive (from IN to OUT), and for currents that are
large in magnitude but negative in sign (OUT to IN),
NOLD asserts low. For options with the autoretry fea-
ture (MAX4827/MAX4829/MAX4831), the NOLD output
is high impedance during the tRETRY period when a for-
ward-current-limit condition is present. However, NOLD
is pulled low if a reverse current-limit condition is pre-
sent during the tRETRY period. A constant time filter is
present at the output of NOLD that gives a 60µs delay
when a no-load condition is asserted. Deassertion of
NOLD is not delayed. During shutdown (ON is low), the
pulldown on NOLD is released to limit power dissipation.
Autoretry (MAX4827/MAX4829/MAX4831)
When the forward- or reverse-current-limit threshold is
exceeded, the tBLANK timer begins counting (Figure 2).
The timer resets if the overcurrent condition disappears
MAX4826–MAX4831
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
_______________________________________________________________________________________ 7
LOAD
CURRENT
SWITCH
STATUS
tBLANK tBLANK
OFF
ON
ON PIN
VOLTAGE
(a)
(b)
UVLO
FFLG
PIN STATUS
LOAD
CURRENT
SWITCH
STATUS OFF
ON
IN PIN
VOLTAGE
FFLG
PIN STATUS
tBLANK tBLANK
Figure 3. MAX4826/MAX4828/MAX4830 Latchoff Fault
Blanking
Figure 2. MAX4827/MAX4829/MAX4831 Autoretry Fault
Blanking Diagram
LOAD
CURRENT
SWITCH
STATUS
tBLANK
OFF
ON
tRETRY
CURRENT
LIMIT
SHORT
CONDITION
REMOVED
tBLANK tBLANK
VIN
VON
LOAD
CURRENT
NOLD
STATUS
NO-LOAD
THRESHOLD
CURRENT
LIMIT
60μs
60μs
Figure 1. MAX4826–MAX4831 No-Load Flag Response
MAX4826–MAX4831
before tBLANK has elapsed. A retry time delay, tRETRY,
is started immediately after tBLANK has elapsed, and
during that time the switch is latched off. At the end of
tRETRY, the switch is turned on again. If the fault still
exists, the cycle is repeated. If the fault has been
removed, the switch stays on.
The autoretry feature saves system power in the case of
an overcurrent or short-circuit condition. During tBLANK,
when the switch is on, the supply current is at the cur-
rent limit. During tRETRY, when the switch is off, no cur-
rent flows through the switch. Instead of observing the
full load current, the switch sees the equivalent load
current, multiplied by the duty cycle or ISUPPLY = ILOAD
x tBLANK / (tBLANK + tRETRY). With a typical tBLANK =
37ms and typical tRETRY = 518ms, the duty cycle is 6%
which results in a 94% power savings, as opposed to
the switch being on the entire time. The duty cycle is
consistent across the process and devices.
Latchoff (MAX4826/MAX4828/MAX4830)
When the forward- or reverse-current-limit threshold is
exceeded, the tBLANK timer begins counting. The timer
resets if the overcurrent condition disappears before
tBLANK has elapsed. The switch is shut off if the over-
current condition continues up to the end of the blank-
ing time. Reset the switch by either toggling ON (Figure
3a), or cycling the input voltage below UVLO, typically
2V (Figure 3b).
Fault Blanking
The MAX4826–MAX4831 feature 14ms (min) fault blank-
ing. Fault blanking allows current-limit faults, including
momentary short-circuit faults that occur when hot swap-
ping a capacitive load. Fault blanking also ensures that
no fault is issued during power-up. When a load transient
causes the device to enter the current limit, an internal
counter starts. If the load-transient fault persists beyond
the fault-blanking timeout, FFLG asserts low. Load-tran-
sient faults less than tBLANK do not cause FFLG asser-
tion. Only current-limit faults are blanked.
A thermal fault and input voltage drops below the UVLO
threshold cause FFLG to assert immediately. These
faults do not wait for the blanking time.
Thermal Shutdown
The MAX4826–MAX4831 have a thermal-shutdown fea-
ture to protect the devices from overheating. The switch
turns off and FFLG goes low immediately (no fault
blanking) when the junction temperature exceeds
+150°C. The switches with the autoretry feature turn
back on when the device temperature drops approxi-
mately 15°C. The switches with the latchoff feature
require ON cycling.
Applications Information
Input Capacitor
To limit the input voltage drop during momentary output
short-circuit conditions, connect a capacitor from IN to
GND. A 0.1µF ceramic capacitor is adequate for most
applications; however, higher capacitor values further
reduce the voltage drop at the input and are recom-
mended for lower voltage applications.
Output Capacitance
Connect a 0.1µF capacitor from OUT to GND. This
capacitor helps prevent inductive parasitics from pulling
OUT negative during turn-off, thus preventing the
MAX4826–MAX4831 from tripping erroneously. If the
load capacitance is too large, current may not have
enough time to charge the capacitance, and the device
assumes that there is a faulty load condition. The maxi-
mum capacitive load value that can be driven from OUT
is obtained by the following formula:
Layout and Thermal Dissipation
To optimize the switch response time to output short-
circuit conditions, it is very important to keep all traces
as short as possible to reduce the effect of undesirable
parasitic inductance. Place input and output capacitors
as close as possible to the device (no more than 5mm).
IN and OUT pins must be connected with short traces
to the power bus.
During normal operation, the power dissipation is small
and the package temperature change is minimal. If the
output is continuously shorted to ground at the maxi-
mum supply voltage, the operation of the switches with
the autoretry option does not cause problems because
the total power dissipated during the short is scaled by
the duty cycle:
where,
VIN_MAX = 5.5V, IOUT_MAX = 240mA, tBLANK = 37ms,
and tRETRY = 518ms.
Attention must be given to the MAX4826/MAX4828/
MAX4830 where the latchoff condition must be manually
reset by toggling ON from high to low. If the latchoff time
duration is not sufficiently high, it is possible for the
device to reach the thermal shutdown threshold and
never be able to turn the device on until it cools down.
PVI t
tt mW
MAX IN MAX OUT MAX BLANK
RETRY BLANK
<××
+=
__ 88
CIt
V
MAX FWD MIN BLANK MIN
IN
<×
__
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
8 _______________________________________________________________________________________
MAX4826–MAX4831
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
_______________________________________________________________________________________ 9
6
ON
5
NOLD
4
FFLG
12
GND
3
OUT
MAX4826–
MAX4831
IN
μDFN
TOP VIEW OF BOTTOM LEADS
Pin Configuration
+2.3V TO +5.5V
IN
FFLG
GND
ON
μP
TO EXTERNAL PORT
MAX4826–
MAX4831
OUT
NOLD
Typical Operating Circuit
N
BLANKING-TIME
CIRCUITRY
REVERSE-CURRENT
DETECTOR
FORWARD-CURRENT
DETECTOR
N
+2.0V
FFLG
OUT
IN
ON
GND
LOGIC
AUTO-
RETRY MAX4826–MAX4831
UNDERVOLTAGE
LOCKOUT
NOLD
GND
N
GND
CURRENT < 5mA DETECTOR (MAX4830/MAX4831)
CURRENT < 10mA DETECTOR (MAX4826–MAX4829)
Functional Diagram
MAX4826–MAX4831
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
10 ______________________________________________________________________________________
Chip Information
PROCESS: BiCMOS
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
6 µDFN L611+1 21-0147
Package Information
For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
MAX4826–MAX4831
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
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 ____________________
11
© 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 5/05 Initial release. —
1 8/09
•Added new automotive part MAX4830ELT/V+T to the Ordering Information/Selector
Guide table.
•Added “+T” to all the part numbers in the Ordering Information/Selector Guide table.
1
