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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX4829 Datasheet

(MAX4826 - MAX4831) 50mA/100mA Current-Limit Switches

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19-3672; Rev 1; 8/09
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
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 0.7Ω on-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
0.7Ω On-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
Ordering Information/Selector Guide
PART
PIN-PACKAGE
MIN FULL-LOAD
LIMIT
(mA)
MAX NO-LOAD
LIMIT
(mA)
MAX4826ELT+T 6 μDFN
50 10
MAX4827ELT+T* 6 μDFN
50 10
MAX4828ELT+T* 6 μDFN
100 10
MAX4829ELT+T 6 μDFN
100 10
MAX4830ELT+T 6 μDFN 50 5
MAX4830ELT/V+T 6 μDFN 50 5
MAX4831ELT+T* 6 μDFN 50 5
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.
ON-RESISTANCE
()
TA = +25°C
1
1
1
1
2
2
2
MODE
Latchoff
Autoretry
Latchoff
Autoretry
Latchoff
Latchoff
Autoretry
TOP
MARK
AK
AL
AM
AN
AO
OX
AP
________________________________________________________________ Maxim Integrated Products 1
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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX4829 Datasheet

(MAX4826 - MAX4831) 50mA/100mA Current-Limit Switches

No Preview Available !

50mA/100mA Current-Limit Switches with
NO-LOAD Flag in µDFN
ABSOLUTE MAXIMUM RATINGS
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
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.
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
Quiescent Current
VIN
IQ
VON = VIN, IOUT = VIN = +2.3V to +5.0V
0, switch on
VIN = +5.0V to +5.5V
2.3 5.5 V
65 100
120
µA
Latchoff Current (Note 2)
ILATCH
VON = VIN = 3.3V, after an overcurrent fault
(MAX4826/MAX4828/MAX4830)
8 15 µA
Shutdown Current
Shutdown Reverse Leakage
ISHDN VON = 0, IOUT = 0mA
ISHDNRV VON = 0, VIN = +2.3V, VOUT = +5.5V
0.01 1
0.01 1
µA
µA
Forward-Current Limit
IFWD
(MAX4826/MAX4827/MAX4830/MAX4831)
RL = 10Ω
(MAX4828/MAX4829) RL = 5Ω
50
100
120
mA
240
Reverse-Current Limit
No-Load Threshold
IREV
INLTH
VOUT - VIN < 0.5V
(MAX4826/MAX4827/MAX4830/MAX4831)
VOUT - VIN < 0.5V (MAX4828/MAX4829)
MAX4826–MAX4829
MAX4830/MAX4831
1.0
0.5
120
mA
240
10.0
mA
5.0
ON Input Leakage
Off-Switch Leakage
Undervoltage Lockout
IONLK
ISWLK
UVLO
VON = VIN or GND
VIN = +5.5V, VON = 0, VOUT = 0
Rising edge
-1 +1
0.01 1
1.8 2.2
µA
µA
V
Undervoltage Lockout Hysteresis
On-Resistance
UVLOHYS
RON
TA = +25°C, IOUT
= 20mA
TA = -40°C to
+85°C,
IOUT = 20mA
(MAX4826–MAX4829)
(MAX4830/MAX4831)
(MAX4826–MAX4829)
(MAX4830/MAX4831)
100
0.7 1.0
1.4 2.0
1.3
2.6
mV
Ω
ON Input-Logic-High Voltage
ON Input-Logic-Low Voltage
VIH
VIL
2.0 V
0.8 V
FFLG, NOLD Output-Logic-Low
Voltage
ISINK = 1mA
0.4 V
2 _______________________________________________________________________________________


Part Number MAX4829
Description (MAX4826 - MAX4831) 50mA/100mA Current-Limit Switches
Maker Maxim Integrated Products
PDF Download

MAX4829 Datasheet PDF






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