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參數資料
| 型號： | MAX1946 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Single USB Switch with Autoreset and Fault Blanking in Tiny QFN |
| 中文描述： | 單路USB開關，帶有自動復位和故障屏蔽，微型TQFN封裝 |
| 文件頁數： | 1/13頁 |
| 文件大?。?/td> | 441K |
| 代理商： | MAX1946 |
General Description
The MAX1946 single current-limited switch with auto-
reset supplies a guaranteed 500mA load in accordance
with USB specifications. The MAX1946 operates from a
2.7V to 5.5V input supply and consumes only 40μA of
quiescent current when operating and only 3μA in shut-
down. Selectable active-high/active-low control logic
and shutdown control provide additional flexibility. An
autoreset feature latches the switch off in the event of a
short circuit, saving system power. The switch reacti-
vates upon removal of the shorted condition.
The MAX1946 provides several safety features to pro-
tect the USB port. Built-in thermal-overload protection
turns off the switch when the die temperature exceeds
+160
°
C. Accurate internal current-limiting circuitry pro-
tects the input supply against both overload and short-
circuit conditions. An open-drain fault signal, (
FAULT
),
notifies the microprocessor (μP) when a thermal over-
load, current-limit, undervoltage lockout (UVLO), or
short-circuit fault occurs. A 20ms fault-blanking feature
enables the circuit to ignore momentary faults, such as
those caused when hot-swapping a capacitive load,
preventing false alarms to the host system. The fault-
blanking feature prevents fault signals from being
issued when the device powers up the load.
The MAX1946 is available in a space-saving 8-pin thin
QFN package and operates over the extended (-40
°
C
to +85
°
C) temperature range.
Applications
USB Ports and USB Hubs
Notebook and Desktop Computers
PDAs and Palmtop Computers
Digital Cameras
Docking Stations
Features
o
Single USB Switch in 3mm x 3mm Package
o
Autoreset Feature Saves System Power
o
Guaranteed 500mA Load Current
o
Built-In 20ms Fault-Blanking Circuitry
o
Active-High or Active-Low Control Logic
o
Fully Compliant to USB Specifications
o
2.7V to 5.5V Input Voltage Range
o
Fault-Indicator Output
o
Thermal-Overload Protection
o
UL Certification Pending
M
Single USB Switch with Autoreset and
Fault Blanking in Tiny QFN
________________________________________________________________
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
19-2550; Rev 1; 1/03
Ordering Information
PART
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 Thin QFN 3mm x 3mm
MAX1946ETA
8
SEL
7
ON
2
GND
QFN
TOP VIEW
OUT
3
OUT
4
IN
6
IN
5
MAX1946
1
FAULT
Pin Configuration
IN
IN
OUT
ACTIVE HIGH
ACTIVE LOW
SELECTABLE
OUT
ON
SEL
FAULT
INPUT
2.7V TO 5.5V
GND
MAX1946
Typical Operating Circuit
相關PDF資料 |
PDF描述 |
|---|---|
| MAX1946ETA | Single USB Switch with Autoreset and Fault Blanking in Tiny QFN |
| MAX1947 | Low Input/Output Voltage Step-Up DC-DC Converter with RESET |
| MAX1947ETAxy | Low Input/Output Voltage Step-Up DC-DC Converter with RESET |
| MAX1947ETA30 | Low Input/Output Voltage Step-Up DC-DC Converter with RESET |
| MAX1947ETA33 | Low Input/Output Voltage Step-Up DC-DC Converter with RESET |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1946ETA | 制造商:Maxim Integrated Products 功能描述:SINGLE USB SWITCH WITH AUTORESET AND FAULT BL - Rail/Tube |
| MAX1946ETA+ | 制造商:Maxim Integrated Products 功能描述:USB PWR SW HI SIDE/DIST SGL 2.7V TO 5.5V 1.1A 8TQFN - Rail/Tube |
| MAX1946ETA+T | 功能描述:電源開關 IC - USB Single USB Switch w/Autoreset RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX1946ETA-T | 功能描述:電源開關 IC - USB Single USB Switch w/Autoreset RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX1946EUA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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