19-0544; Rev 2; 6/08
100mA/200mA/300mA Current-Limit Switches
with Low Shutdown Reverse Current
5MX4917A/B
General Description
Features
♦ Guaranteed Current Limit: 100mA, 200mA, 300mA
♦ Thermal-Shutdown Protection
♦ Reverse Current Protection
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.
♦ 0.2Ω On-Resistance
♦ 14ms Guaranteed Blanking Time
♦ FLAG Function
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.
♦ 80µA Supply Current
♦ 8µA Latchoff Current
(MAX4914B/MAX4915B/MAX4917B)
♦ Autoretry (MAX4915A/MAX4917A)
♦ 0.01µA Shutdown Current
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.
♦ 2.3V to 5.5V Supply Range
♦ Undervoltage Lockout
♦ Fast Current-Limit Response Time (5µs)
♦ Low (0.1µA typ) Reverse Shutdown Current
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.
♦ Tiny 6-Pin µDFN (2mm x 2mm) and 5-Pin SOT23
Packages
Applications
PDAs and Palmtop
Devices
Handheld Devices
SDIO
Cell Phones
USB Ports
GPS Systems
Notebook Computers
Ordering Information/Selector Guide
PART
PIN-PACKAGE
TOP MARK
ABF
CURRENT LIMIT (mA)
RETRY/LATCH-OFF
Latchoff
MAX4914BELT+T
MAX4915AELT+T
MAX4915AEUK+T*
MAX4915BELT+T
MAX4915BEUK+T*
MAX4917AELT+T
MAX4917AEUK+T*
MAX4917BELT+T
MAX4917BEUK+T*
6 µDFN
6 µDFN
5 SOT23
6 µDFN
5 SOT23
6 µDFN
5 SOT23
6 µDFN
5 SOT23
100
200
200
200
200
300
300
300
300
ABL
Autoretry
Autoretry
Latchoff
AEYN
ABG
AEYK
ABN
Latchoff
Autoretry
Autoretry
Latchoff
AEYP
ABI
AEYM
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
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.