MAX1922：1A Current-Limited Switch for 2 USB Ports
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.
Key Features
| MAX1922: Typical Operating Circuit Applications/Uses
|
DataSheet
| title | Download file |
|---|---|
| MAX1922 Data Sheet | MAX1922.pdf |
Parametrics
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | typ | min | max | See Notes | ||||||||
| MAX1922 | Yes | 1 | 1400 | 1400 | Yes | 20 | Preset | 0.07 | 2.7 | 5.5 | -40 to +85 | SOIC(N)/8 TDFN-EP/10 | $0.99 @1k |
Quality and Environmental Data
Related Products
- MAX1607：USB Current-Limited Switch in Pin-Compatible Package
- MAX1694：USB Current-Limited Switches with Fault Blanking
- MAX1693：USB Current-Limited Switches with Fault Blanking
Ordering Information
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
|---|---|---|---|---|---|
| MAX1922ESA | No Longer Available | MAX1922ESA+ | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | No |
| MAX1922ESA+ | Active | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
| MAX1922ESA+C71073 | Active | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
| MAX1922ESA+T | Active | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
| MAX1922ESA-T | No Longer Available | MAX1922ESA+T | N.SO;8 pin | -40°C to +85°C | See data sheet |
| MAX1922ETB+ | Active | TDFN-EP,;10 pin;9.6 mm² | -40°C to +85°C | Lead Free | |
| MAX1922ETB+C3B | Active | TDFN-EP,;10 pin;9.6 mm² | -40°C to +85°C | Lead Free | |
| MAX1922ETB+T | Active | TDFN-EP,;10 pin;9.6 mm² | -40°C to +85°C | Lead Free | |
| MAX1922ETB+TC3B | No Longer Available | TDFN-EP,;10 pin;9.6 mm² | -40°C to +85°C | Lead Free |
- MAX1922.pdf MAX1922
- MAX1922.pdf MAX1922
- MAX1922.pdf MAX1922
- MAX1922.pdf MAX1922
- MAX1922.pdf MAX1922
