MAX4914B Datasheet, PDF (1/11 Pages) Maxim Integrated Products – 100mA/200mA/300mA Current-Limit Switches with Low Shutdown Reverse Current

19-0544; Rev 2; 6/08
100mA/200mA/300mA Current-Limit Switches
with Low Shutdown Reverse Current
General Description
The MAX4914B/MAX4915A/B/MAX4917A/B family of switch-
es feature internal current limiting to prevent damage to host
devices due to faulty load conditions. These analog switches
have a low 0.2Ω on-resistance and operate from a 2.3V
to 5.5V input voltage range. They are available with guaran-
teed 100mA, 200mA, and 300mA current limits, making
them ideal for SDIO and other load switching applications.
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 MAX4914B/MAX4915B/MAX4917B latchoff versions
enter a latchoff state where the switch is turned off and
FLAG is issued to the microprocessor. The switch can
be turned on again by cycling the power or the ON pin.
The MAX4915A/MAX4917A have an autoretry feature
where the switch turns off after the blanking time and
then continuously checks to see if the overload condi-
tion is present. The switch turns on and remains on after
the overload condition disappears and FLAG deasserts.
The MAX4914B is available in the tiny 6-pin µDFN
(2mm x 2mm) package, while the MAX4915A/B
and MAX4917A/B are available in both 6-pin µDFN
(2mm x 2mm) and space-saving 5-pin SOT23 pack-
ages. These devices operate over the -40°C to +85°C
extended temperature range.
Applications
Features
♦ Guaranteed Current Limit: 100mA, 200mA, 300mA
♦ Thermal-Shutdown Protection
♦ Reverse Current Protection
♦ 0.2Ω On-Resistance
♦ 14ms Guaranteed Blanking Time
♦ FLAG Function
♦ 80µA Supply Current
♦ 8µA Latchoff Current
(MAX4914B/MAX4915B/MAX4917B)
♦ Autoretry (MAX4915A/MAX4917A)
♦ 0.01µA Shutdown Current
♦ 2.3V to 5.5V Supply Range
♦ Undervoltage Lockout
♦ Fast Current-Limit Response Time (5µs)
♦ Low (0.1µA typ) Reverse Shutdown Current
♦ Tiny 6-Pin µDFN (2mm x 2mm) and 5-Pin SOT23
Packages
PDAs and Palmtop
Devices
Cell Phones
GPS Systems
Handheld Devices
SDIO
USB Ports
Notebook Computers
Ordering Information/Selector Guide
PART
PIN-PACKAGE
TOP MARK
CURRENT LIMIT (mA)
RETRY/LATCH-OFF
MAX4914BELT+T
6 µDFN
ABF
100
Latchoff
MAX4915AELT+T
6 µDFN
ABL
200
Autoretry
MAX4915AEUK+T*
5 SOT23
AEYN
200
Autoretry
MAX4915BELT+T
6 µDFN
ABG
200
Latchoff
MAX4915BEUK+T*
5 SOT23
AEYK
200
Latchoff
MAX4917AELT+T
6 µDFN
ABN
300
Autoretry
MAX4917AEUK+T*
5 SOT23
AEYP
300
Autoretry
MAX4917BELT+T
6 µDFN
ABI
300
Latchoff
MAX4917BEUK+T*
5 SOT23
AEYM
300
Latchoff
Note: All devices are specified over the -40°C to +85°C operating temperature range.
*Future product—contact factory for availability.
+Denotes a lead-free/RoHS-compliant package.
T = Tape-and-reel package.
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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