MAX1694:USB Current-Limited Switches with Fault Blanking

Single, USB Current Limited Switch with Fault Blanking in a µMAX Package

The MAX1693/(MAX1693H)/MAX1694 are current-limited, 60mΩ switches with built-in fault blanking. Their accurate preset current limit of 0.7A to 1.0A makes them ideally suited for USB applications. Their low quiescent supply current (14µA) and shutdown current (1µA) conserve battery power in portable applications. The MAX1693/(MAX1693H)/MAX1694 operate with inputs from +2.7V to +5.5V, making them ideal for both +3V and +5V systems. A fault signal notifies the microprocessor that the internal current limit has been reached. A 10ms fault-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 fault blanking also prevents a fault signal from being issued when the device is powering up. In the MAX1693/(MAX1693H), an output overcurrent condition causes the switch to current limit at 0.7A to 1.0A and active-low FAULT to go low after the 10ms blanking period. When the overcurrent condition is removed, active-low FAULT returns to its high-impedance state. In the MAX1694, any overcurrent longer than 10ms will latch the switch open and set active-low FAULT low. The latch is cleared by cycling the active-low ON input or by powering up the device again. This feature saves power by preventing the device from thermally cycling on and off in case of a persistent short-circuit condition. The MAX1693/(MAX1693H)/MAX1694 have several safety features to ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperatures. Both devices have accurate internal current-limiting circuitry to protect the input supply against overload. They are available in space-saving 10-pin µMAX® packages.

Key Features
  • Accurate Current Limit (0.7A min, 1.0A max)
  • Guaranteed 0.75A Short-Circuit Protection
  • 10ms Internal Fault-Blanking Timeout
  • No Fault Signal During Power-Up
  • Latched active-low FAULT Output Turns Off Power Switch (MAX1694)
  • Thermal Shutdown Protection
  • +2.7V to +5.5V Supply Range
  • 14µA Supply Current
  • Small 10-Pin µMAX Package
MAX1693, MAX1693H, MAX1694: Typical Operating Circuit
MAX1693, MAX1693H, MAX1694: Typical Operating Circuit
Applications/Uses
  • Battery Chargers
  • Docking Stations
  • Hot Plug-In Power Supplies
  • Notebook Computers
  • Portable Equipment
  • USB Ports and Hubs
DataSheet
titleDownload file
MAX1693-MAX1694 Data SheetMAX1693-MAX1694.pdf
Parametrics
Part NumberUSBPower SwitchesCurrent Limit
(mA)
Current Limit
(mA)
Fault IndicatorCurrent Limit Accuracy
(%)
Current Limit Set ByLowest Adj. Setting
(A)
RON
(Ω)
VSUPPLY
(V)
VSUPPLY
(V)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxtypminmaxSee Notes
MAX1693Yes17001000Yes18Preset0.70.062.75.5-40 to +85µMAX/10$0.79 @1k
MAX1693HµMAX/10
MAX1694µMAX/10
Related Products
  • MAX1607:USB Current-Limited Switch in Pin-Compatible Package
  • MAX869L:2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown
  • MAX890L:1.2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1694EUBLast Time BuyµMAX,;10 pin;15.4 mm²-40°C to +85°CNo
MAX1694EUB+ActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
MAX1694EUB+TActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
MAX1694EUB-TNo Longer AvailableMAX1694EUB+TµMAX,;10 pin;15.4 mm²-40°C to +85°CNo
MAX1693-MAX1694.pdf MAX1694
MAX1693-MAX1694.pdf MAX1693H