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PDF MAX4915AELT Data sheet ( Hoja de datos )
| Número de pieza | MAX4915AELT | |
| Descripción | 100mA/200mA/300mA Current-Limit Switches | |
| Fabricantes | Maxim Integrated | |
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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
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.
1 page  
100mA/200mA/300mA Current-Limit Switches
with Low Shutdown Reverse Current
Typical Operating Characteristics (continued)
(VIN = 3.3V, TA = +25°C, unless otherwise noted.)
TURN-OFF RESPONSE
MAX4914A/B toc15
CIN = 0.1μF
COUT = 0.1μF
VON
1V/div
0V
IOUT
10mA/div
200ns/div
0mA
FLAG-BLANKING RESPONSE
MAX4914A/B toc16
VIN
2V/div
CIN = 0.1μF
COUT = 0.1μF
0V
VON
2V/div
0V
VFLAG
2V/div
0V
10ms/div
IOUT
200mA/div
0mA
PIN
MAX4915A/B/
MAX4917A/B
(SOT23)
MAX4914A/B/
MAX4915A/B/
MAX4917A/B
(µDFN)
12
25
36
44
53
—1
Pin Description
NAME
FUNCTION
IN
GND
ON
FLAG
OUT
N.C.
Input. Bypass with a 0.1µF ceramic capacitor to ground as close to the device
as possible.
Ground
Active-High, Switch-On Input. A logic-high turns the switch on.
Fault Output. This open-drain output goes low when the device stays in
forward or reverse current limit for more than the blanking time period. FLAG is
high impedance when a fault is not present or when ON is low.
Switch Output. Bypass with a 0.1µF ceramic capacitor to ground as close to
the device as possible.
No Connection. Not internally connected.
_______________________________________________________________________________________ 5
5 Page 
100mA/200mA/300mA Current-Limit Switches
with Low Shutdown Reverse Current
Revision History
REVISION
NUMBER
0
1
2
REVISION
DATE
5/06
12/06
6/08
DESCRIPTION
Initial release
Removed future product notes. Added new VIH and VIL EC table specs for the
MAX4915
Changed VIH and VIL EC table specs for the MAX4917A
PAGES CHANGED
—
—
2
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
© 2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
11 Page | ||
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