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MAX4790 Datasheet

  • MAX4790

  • 200mA/ 250mA/300mA Current-Limit Switches

  • Maxim   Maxim

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19-2663; Rev 0; 10/02
200mA/250mA/300mA Current-Limit Switches
General Description
The MAX4789鈥揗AX4794 family of switches feature
internal current limiting to prevent damage to host
devices due to faulty load conditions. These analog
switches have a low 0.2鈩?on-resistance and operate
from 2.3V to 5.5V input voltage range. They are avail-
able with guaranteed 200mA, 250mA, and 300mA cur-
rent 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 MAX4789, MAX4791, and MAX4793 enter a latch-
off 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 MAX4790, MAX4792, and MAX4794 have an
autoretry feature where the switch turns off after the
blanking time and then continuously checks to see if
the overload condition is present. The switch remains
on after the overload condition disappears.
The MAX4789鈥揗AX4794 are available in 6-pin thin QFN
and tiny space-saving 4-pin SOT143 packages. The
MAX4789/MAX4791/MAX4793 are also available in a
tiny 5-pin SOT23 package. For lower current current-limit-
ing switches, refer to the MAX4785鈥揗AX4788 data sheet.
o
Thermal-Shutdown Protection
o
Reverse Current Protection
o
0.2鈩?On-Resistance
o
14ms Guaranteed Blanking Time
o
FLAG
Function (MAX4789/MAX4791/MAX4793)
o
80碌A(chǔ) Supply Current
o
8碌A(chǔ) Latch-Off Current
(MAX4789/MAX4791/MAX4793)
o
0.01碌A(chǔ) Shutdown Current
o
2.3V to 5.5V Supply Range
o
Undervoltage Lockout
o
Fast Current-Limit Response Time (5碌s)
o
Tiny QFN and SOT23/SOT143 Packages
Features
o
Guaranteed Current Limit: 200mA, 250mA, 300mA
MAX4789鈥揗AX4794
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
TOP
MARK
KAFE
AEAC
ABO
KAFF
ABP
MAX4789EUS-T
-40擄C to +85擄C 4 SOT143-4
MAX4789EUK-T -40擄C to +85擄C 5 SOT23-5
MAX4789ETT
MAX4790ETT
-40擄C to +85擄C 3 x 3 Thin QFN-EP*
-40擄C to +85擄C 3 x 3 Thin QFN-EP
MAX4790EUS-T
-40擄C to +85擄C 4 SOT143-4
Applications
PDAs and Palmtop Devices
Cell Phones
GPS Systems
Hand-Held Devices
SDIO
*EP
= Exposed pad.
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
Typical Operating Circuit
2.3V TO 5.5V
Pin Configurations
TOP VIEW
IN
IN
1
GND
2
ON
3
5
OUT
OUT
1
4
IN
ON
碌P
MAX4789
MAX4791
MAX4793
MAX4789鈥?/div>
MAX4794
4
FLAG
GND
2
3
ON
MAX4789
MAX4791
MAX4793
GND
FLAG
TO SDIO PORT
OUT
SOT23
SOT143
Pin Configurations continued at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

MAX4790 PDF文件相關(guān)型號(hào)

MAX4791,MAX4792,MAX4793,MAX4794

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