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MAX4914B, MAX4915A, MAX4915B, MAX4917A, MAX4917B

100mA/200mA/300mA Current-Limit Switches with Low Shutdown Reverse Current

Multiple Current-Limit Values (100mA/200mA/300mA) and Low Reverse Leakage Current in Shutdown Mode
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The MAX4914B/MAX4915A/B/MAX4917A/B family of switches feature internal current limiting to prevent damage to host devices due to faulty load conditions. These analog switches have a low 0.2Ω on-resistance and operate from a 2.3V to 5.5V input voltage range. They are available with guaranteed 100mA, 200mA, and 300mA current limits, making them ideal for SDIO and other load switching applications.

When the switch is on and a load is connected to the port, a guaranteed blanking time of 14ms ensures that the transient voltages settle down. If after this blanking time the load current is greater than the current limit, the MAX4914B/MAX4915B/MAX4917B latchoff versions enter a latchoff state where the switch is turned off and active-low FLAG is issued to the microprocessor. The switch can be turned on again by cycling the power or the ON pin.

The MAX4915A/MAX4917A have an autoretry feature where the switch turns off after the blanking time and then continuously checks to see if the overload condition is present. The switch turns on and remains on after the overload condition disappears and active-low FLAG deasserts.

The MAX4914B is available in the tiny 6-pin µDFN (2mm x 2mm) package, while the MAX4915A/B and MAX4917A/B are available in both 6-pin µDFN (2mm x 2mm) and space-saving 5-pin SOT23 packages. These devices operate over the -40°C to +85°C extended temperature range.

Data Sheet

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Key Features

  • Guaranteed Current Limit: 100mA, 200mA, 300mA
  • Thermal-Shutdown Protection
  • Reverse Current Protection
  • 0.2Ω On-Resistance
  • 14ms Guaranteed Blanking Time
  • Active-Low FLAG Function
  • 80µA Supply Current
  • 8µA Latchoff Current (MAX4914B/MAX4915B/MAX4917B)
  • Autoretry (MAX4915A/MAX4917A)
  • 0.01µA Shutdown Current
  • 2.3V to 5.5V Supply Range
  • Undervoltage Lockout
  • Fast Current-Limit Response Time (5µs)
  • Low (0.1µA typ) Reverse Shutdown Current
  • Tiny 6-Pin µDFN (2mm x 2mm) and 5-Pin SOT23 Packages


  • Cell Phones
  • GPS Systems
  • Handheld Devices
  • Notebook Computers
  • PDAs and Palmtop Devices
  • SDIO
  • USB Ports

Key Specifications:

Current Limit and USB Power Switches
Part Number Power Switches Current Limit
Current Limit
Fault Indicator Current Limit Accuracy
Current Limit Set By RON
Oper. Temp.
Min. Max. typ min max See Notes
MAX4914B  1 100 100 Yes 20 Preset 0.2 2.3 5.5 -40 to +85 $1.62 @1k
MAX4915A  200 200 $1.24 @1k
MAX4915B  200 200 $1.24 @1k
MAX4917A  300 300 $1.62 @1k
MAX4917B  300 300 $1.62 @1k
See All Current Limit and USB Power Switches (83)

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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX4914B, MAX4915A, MAX4915B, MAX4917A, MAX4917B: Typical Operating Circuit
Typical Operating Circuit

More Information

Topmark Coding MAX4914B
Topmark Coding MAX4915A
Topmark Coding MAX4915B
Topmark Coding MAX4917A
Topmark Coding MAX4917B

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Document Ref.: 19-0544 Rev 2; 2008-10-02
This page last modified: 2011-02-16