參數(shù)資料
型號(hào)： MAX1823HEUB
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 電源管理
英文描述： Dual USB Switch with Fault Blanking and Autoreset
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10
封裝： MICRO, SOP-10
文件頁數(shù)： 1/13頁
文件大小： 302K
代理商： MAX1823HEUB
General Description
The MAX1823 is a dual, current-limited switch with
autoreset specifically made for USB applications. The
autoreset feature latches the switch off if the output is
shorted, saving system power. The switch reactivates
when the short circuit is removed. Each channel is guar-
anteed to supply 720mA and meet USB specifications.
Low quiescent supply current (50μA) and standby current
(3μA) conserve battery power in portable applications.
The MAX1823 has multiple safety features to ensure
that the USB port is protected. Built-in thermal-overload
protection limits power dissipation and junction temper-
ature. Accurate internal current-limiting circuitry pro-
tects the input supply against both overload and
short-circuit conditions. Independent fault signals
(
FAULTA
and
FAULTB
) notify the microprocessor (μP)
when a thermal-overload, current-limit, undervoltage-
lockout (UVLO), or short-circuit fault occurs. A 20ms
fault-blanking feature ignores momentary faults, such
as those caused when hot swapping a capacitive load,
preventing false alarms to the host system. The
MAX1823A/MAX1823B also block reverse current (cur-
rent from OUT_ to IN_) while in shutdown.
The MAX1823 is available in a space-saving 10-pin
μMAX package. The MAX1823/MAX1823A are enabled
with an active-low signal, and the MAX1823B/MAX1823H
are enabled with an active-high signal. For a single ver-
sion of this device, refer to the MAX1946 data sheet. For
a triple version, refer to the MAX1940 data sheet.
Applications
USB Ports and Hubs
Notebook and Desktop Computers
PDAs and Palmtop Computers
Docking Stations
Features
o
Dual USB Switch in Tiny 10-Pin μMAX Package
o
Autoreset Feature Saves Power
o
Guaranteed 720mA Load per Channel
o
Built-In 20ms Fault Blanking
o
Compliant to USB Specification
o
Blocks Reverse Current in Shutdown
(MAX1823A/MAX1823B)
o
4V to 5.5V Input Voltage Range
o
Independent Shutdown Control
(MAX1823/MAX1823A—Active Low)
(MAX1823B/MAX1823H—Active High)
o
Independent
FAULT
Indicator Outputs
o
Thermal-Overload Protection
o
50μA Quiescent Current (Both Switches On)
o
3μA Standby Current
o
UL Recognized
M
Dual USB Switch with Fault
Blanking and Autoreset
________________________________________________________________
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
Typical Operating Circuit
19-1903; Rev 3; 10/03
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 μMAX
10 μMAX
10 μMAX
10 μMAX
MAX1823
EUB
MAX1823A
EUB
MAX1823B
EUB
MAX1823H
EUB
Pin Configuration
ONB
ONB
ONA
ONA
GND
MAX1823
MAX1823A
FAULTB
FAULTA
IN
INA
INB
USB
PORT A
OUTA
USB
PORT B
OUTB
INPUT
4V TO 5.5V
1
2
3
4
5
10
9
8
7
6
OUTA
GND
OUTB
INB
IN
INA
MAX1823
MAX1823A
MAX1823B
MAX1823H
μ
MAX
TOP VIEW
*(ONA) ONA
*(ONB) ONB
*( ) ARE FOR MAX1823B/MAX1823H.
FAULTB
FAULTA
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參數(shù)描述
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