|
MAX1922
1A Current-Limited Switch for 2 USB Ports
|
Status
Active: In Production.
Description
The MAX1922 current-limited 70mΩ 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 applications. The MAX1922 operates with inputs from 2.7V to 5.5V, making it ideal for both 3V and 5V systems.
An overcurrent signal (active-low 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 active-low 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 protection limits power dissipation and junction temperature. The device also has accurate internal current-limiting circuitry to protect the input supply against overload.
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°) temperature range.
|
|
Data Sheet
|
Key Features
- Accurate Current Limit (1.4A min, 2.1A max)
- 10ms Internal Active-Low OC Blanking Timeout
- Active-Low OC Blanking During Power-Up
- 125mΩ max High-Side MOSFET
- Short-Circuit and Thermal Protection with Overcurrent Logic Output
- Undervoltage Lockout
- 16µA Quiescent Supply Current
- 1µA (max) Standby Supply Current
- 2.7V to 5.5V Supply Range
- UL® Recognized: UL# E211395
|
|
Applications/Uses
- Docking Stations
- Notebook Computers
- USB Hubs
- USB Ports
|
|
|
|
Key Specifications:
| Current Limit and USB Power Switches |
| Part Number |
USB |
Power Switches |
Current Limit
(mA) |
Current Limit
(mA) |
Fault Indicator |
Current Limit Accuracy
(%) |
Current Limit Set By |
RON
(Ω) |
VSUPPLY
(V) |
VSUPPLY
(V) |
Oper. Temp.
(°C) |
Package/Pins |
Budgetary Price |
| ≥ |
≤ |
typ |
min |
max |
See Notes |
| MAX1922 |
Yes |
1 |
1400 |
1400 |
Yes |
20 |
Preset |
0.07 |
2.7 |
5.5 |
-40 to +85 |
|
$0.99 @1k |
|
See All Current Limit and USB Power Switches (77)
|
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
|
|
Diagram
 Typical Operating Circuit
Reliability Reports
Software/Models
Ordering Information
|
Part Number
|
Free
Sample |
Buy |
Status
|
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
|
Temp |
RoHS/Lead-Free?
Materials Analysis
|
| MAX1922ESA
|
|
|
Active |
SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-5*
|
-40°C to +85°C
|
RoHS/Lead-Free: No
Materials Analysis |
| MAX1922ESA+
|
|
|
Active |
SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
|
-40°C to +85°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1922ESA+C71073
|
|
|
Active |
SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
|
-40°C to +85°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1922ESA+T
|
|
|
Active |
SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+5*
|
-40°C to +85°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1922ESA-T
|
|
|
Active |
N.SO;8 pin
Land Pattern: Not Available
|
-40°C to +85°C
|
See data sheet
|
| MAX1922ETB+T
|
|
|
Active |
TDFN-EP;10 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0003 (PDF)
Use pkgcode/variation: T1033+1*
|
-40°C to +85°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1922ETB+TC3B
|
|
|
Active |
TDFN;
Land Pattern: Not Available
|
-40°C to +85°C
|
See data sheet
|
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
|
Similar Products by Function
Similar Products by Application
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-2254
Rev 3;
2010-01-19
This page last modified: 2010-01-19
|
Download
E-Mail