參數(shù)資料
型號： MAX4789EUS-T
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 模擬信號調(diào)理
英文描述： 200mA/250mA/300mA Current-Limit Switches
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO4
封裝： SOT-143, 4 PIN
文件頁數(shù)： 1/13頁
文件大小： 326K
代理商： MAX4789EUS-T
General Description
The MAX4789–MAX4794 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
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–MAX4794 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–MAX4788 data sheet.
Applications
PDAs and Palmtop Devices
Cell Phones
GPS Systems
Hand-Held Devices
SDIO
Features
o
Guaranteed Current Limit: 200mA, 250mA, 300mA
o
Thermal-Shutdown Protection
o
Reverse Current Protection
o
0.2
On-Resistance
o
14ms Guaranteed Blanking Time
o
FLAG
Function (MAX4789/MAX4791/MAX4793)
o
80μA Supply Current
o
8μA Latch-Off Current
(MAX4789/MAX4791/MAX4793)
o
0.01μA Shutdown Current
o
2.3V to 5.5V Supply Range
o
Undervoltage Lockout
o
Fast Current-Limit Response Time (5μs)
o
Tiny QFN and SOT23/SOT143 Packages
M
200mA/250mA/300mA Current-Limit Switches
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
Ordering Information
2.3V TO 5.5V
IN
OUT
FLAG
GND
ON
μ
P
TO SDIO PORT
MAX4789
MAX4791
MAX4793
Typical Operating Circuit
19-2663; Rev 1; 8/03
*
EP = Exposed pad.
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
PART
TEMP RANGE
PIN-PACKAGE
TOP
MARK
MAX4789
EUS-T
MAX4789EUK-T
MAX4789ETT
MAX4790
EUS-T
MAX4790ETT
-40
°
C to +85
°
C 4 SOT143-4
-40
°
C to +85
°
C 5 SOT23-5
-40
°
C to +85
°
C 3 x 3 Thin QFN-EP*
-40
°
C to +85
°
C 4 SOT143-4
-40
°
C to +85
°
C 3 x 3 Thin QFN-EP
KAFE
AEAC
ABO
KAFF
ABP
GND
FLAG
Pin Configurations continued at end of data sheet.
1
5
OUT
IN
MAX4789
MAX4791
MAX4793
SOT23
TOP VIEW
2
3
4
ON
ON
1
4
IN
OUT
MAX4789–
MAX4794
SOT143
2
3
GND
Pin Configurations
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