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50mA/100mA Current-Limit Switches with NO-LOAD Flag in µDFN

Product Details

Key Features

Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) 50
Current Limit (mA) (max) 50
# Power Switches 1
Fault Indicator Yes
Current Limit Accuracy (%) 41
Current Limit Set By Preset
RON (Ω) (typ) 0.7
VSUPPLY (V) (min) 2.3
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins UDFN/6
Budgetary
Price (See Notes)
0
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Simplified Block Diagram

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Parameters

Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) 50
Current Limit (mA) (max) 50
# Power Switches 1
Fault Indicator Yes
Current Limit Accuracy (%) 41
Current Limit Set By Preset
RON (Ω) (typ) 0.7
VSUPPLY (V) (min) 2.3
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins UDFN/6
Budgetary
Price (See Notes)
0

Key Features

  • Guaranteed Current Limit: 50mA, 100mA
  • Thermal Shutdown Protection
  • Reverse-Current Protection
  • 0.7Ω On-Resistance (MAX4826–MAX4831)
  • 14ms Guaranteed Blanking Time
  • Fault Flag (Active-Low FFLG)
  • No-Load Flag (Active-Low NOLD)
  • 65µA Supply Current
  • 8µA Latchoff Current
  • 0.01µA Shutdown Current
  • +2.3V to +5.5V Supply Range
  • Undervoltage Lockout
  • Fast Current-Limit Response Time
  • 6-Pin µDFN Package (1mm x 1.5mm)

Applications/Uses

  • Cell Phones
  • Digital Still Cameras
  • Global Positioning Systems (GPS)
  • MP3 Players
  • PDAs and Palmtop Devices

Description

The MAX4826–MAX4831 family of switches has internal current limiting to prevent host devices from being damaged due to faulty load conditions. These analog switches have a low 0.7Ω on-resistance and operate from a +2.3V to +5.5V input voltage range. These devices are available with guaranteed 50mA and 100mA current limits, making them ideal for load-switching applications. In addition to the current-limit fault flag (active-low FFLG), an open-drain no-load flag indicator (active-low NOLD) notifies the system when the current through the switch is less than 10mA (MAX4826–MAX4829), or 5mA (MAX4830/MAX4831).

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 MAX4826/MAX4828/MAX4830 enter a latchoff state where the switch is turned off, and FFLG is issued to the microprocessor. The switch can be turned on again by cycling the power or ON.

The MAX4827/MAX4829/MAX4831 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 current-limit fault flag (active-low FFLG) is issued and remains low until after the fault condition is removed. The switch remains on after the overload condition disappears.

The MAX4826–MAX4831 operate over the extended -40°C to +85°C temperature range, and are available in tiny space-saving, 1mm x 1.5mm, 6-pin µDFN package.

Simplified Block Diagram

MAX4826, MAX4827, MAX4828, MAX4829, MAX4830, MAX4831: Typical Operating Circuit MAX4826, MAX4827, MAX4828, MAX4829, MAX4830, MAX4831: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.