19-1903; Rev 3; 10/03
Dual USB Switch with Fault
Blanking and Autoreset
General Description
Features
ꢀ Dual USB Switch in Tiny 10-Pin µMAX Package
ꢀ Autoreset Feature Saves Power
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.
ꢀ Guaranteed 720mA Load per Channel
ꢀ Built-In 20ms Fault Blanking
ꢀ Compliant to USB Specification
ꢀ Blocks Reverse Current in Shutdown
(MAX1823A/MAX1823B)
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.
ꢀ 4V to 5.5V Input Voltage Range
ꢀ Independent Shutdown Control
(MAX1823/MAX1823A—Active Low)
(MAX1823B/MAX1823H—Active High)
ꢀ Independent FAULT Indicator Outputs
ꢀ Thermal-Overload Protection
ꢀ 50µA Quiescent Current (Both Switches On)
ꢀ 3µA Standby Current
ꢀ UL Recognized
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.
Ordering Information
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
MAX1823EUB
MAX1823AEUB
MAX1823BEUB
MAX1823HEUB
10 µMAX
10 µMAX
10 µMAX
Applications
USB Ports and Hubs
Notebook and Desktop Computers
PDAs and Palmtop Computers
Docking Stations
Typical Operating Circuit
USB
INA
IN
OUTA
PORT A
INPUT
4V TO 5.5V
INB
Pin Configuration
MAX1823
MAX1823A
TOP VIEW
*(ONA) ONA
1
2
3
4
5
10 FAULTA
USB
PORT B
FAULTA
FAULTB
OUTB
INA
IN
9
8
7
6
OUTA
GND
MAX1823
MAX1823A
MAX1823B
MAX1823H
INB
OUTB
FAULTB
ONA
ONB
ONA
ONB
*(ONB) ONB
GND
µMAX
*( ) ARE FOR MAX1823B/MAX1823H.
________________________________________________________________ Maxim Integrated Products
1
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.
5秒后页面跳转
STM32H743技术深度剖析与应用案例探索
LM321中文资料解析：引脚功能介绍、技术特点、技术特性分析
74HC14芯片资料介绍：性能特性分析、引脚介绍
LM1875芯片手册：功放参数分析、引脚说明、电路设计要点
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
