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参数资料
| 型号： | MAX1922ESA+C71073 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/9页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH CURRENT-LIMIT 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | USB 开关 |
| 输出数： | 1 |
| Rds（开）： | 100 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 1A |
| 输入电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
19-2254; Rev 3; 4/09
1A Current-Limited Switch for 2 USB Ports
General Description
The MAX1922 current-limited 70m Ω switch with built-in
fault blanking provides an accurate, preset 1.4A to 2.1A
current limit, making it ideal for dual USB applications.
Its low quiescent supply current (16μA) and standby
current (1μA) conserve battery power in portable appli-
cations. The MAX1922 operates with inputs from 2.7V
to 5.5V, making it ideal for both 3V and 5V systems.
An overcurrent signal ( OC ) notifies the microprocessor
that the internal current limit has been reached. A 10ms
overcurrent-blanking feature allows momentary faults
(such as those caused when hot-swapping into a
capacitive load) to be ignored, thus preventing false
alarms to the host system. This blanking also prevents
an OC signal from being issued when the device is
powering up.
The MAX1922 has several safety features to ensure that
the USB port is protected. Built-in thermal-overload pro-
tection limits power dissipation and junction tempera-
ture. The device also has accurate internal current-
limiting circuitry to protect the input supply against
overload.
Features
o Accurate Current Limit (1.4A min, 2.1A max)
o 10ms Internal OC Blanking Timeout
o OC Blanking During Power-Up
o 125m Ω (max) High-Side MOSFET
o Short-Circuit and Thermal Protection with
Overcurrent Logic Output
o Undervoltage Lockout
o 16μA Quiescent Supply Current
o 1μA (max) Standby Supply Current
o 2.7V to 5.5V Supply Range
o UL Recognized: UL# E211395
Ordering Information
The MAX1922 is offered in a space-saving 8-pin SO
package and a 10-pin TDFN package and operates over
the extended (-40°C to +85°C) temperature range.
PART
MAX1922ESA+
MAX1922ETB+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
8 SO
10 TDFN-EP*
TOP
MARK
—
AQQ
Applications
Notebook Computers
USB Ports
USB Hubs
Docking Stations
Pin Configurations
TOP VIEW
*EP = Exposed paddle.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Typical Operating Circuit
INPUT
2.7V TO 5.5V
IN
OUT
OUTPUT
GND
1
8
OUT
MAX1922
IN
2
7
OUT
MAX1922
IN
3
6
OUT
OC
EN 4
5
OC
OFF
SO
Pin Configurations continued at end of data sheet.
ON
EN
GND
________________________________________________________________ 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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1922ESA-T | 功能描述:电源开关 IC - USB 1A Crnt-Ltd Switch for 2 USB Ports RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1922ETB+ | 制造商:Maxim Integrated Products 功能描述:CURRENT LIMIT SW 1-IN 1-OUT 2.7V TO 5.5V 2.1A 10TDFN EP - Rail/Tube |
| MAX1922ETB+T | 功能描述:电源开关 IC - USB 1A Crnt-Ltd Switch for 2 USB Ports RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1922ETB+TC3B | 功能描述:电源开关 IC - USB 1A Crnt-Ltd Switch for 2 USB Ports RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1922ETB+W | 制造商:Maxim Integrated Products 功能描述:CURRENT LIMIT SW 1-IN 1-OUT 2.7V TO 5.5V 2.1A 10TDFN EP - Rail/Tube |
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