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AAT1138

SpecificationsVIN Range: 2.5V to 5.5 VVOUT Range: 0.6V to VPVIN System Current Limited Load SwitchProgrammable Over-Current Threshold< 1s Fast Transient Response to Short Current145mΩ Typical RDS(ON) Step-Down ConverterUp to 2A Output Current95% Peak Efficiency1.2MHz Switching Frequency135m&#...

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SeekIC No. : 004261008 Detail

AAT1138: SpecificationsVIN Range: 2.5V to 5.5 VVOUT Range: 0.6V to VPVIN System Current Limited Load SwitchProgrammable Over-Current Threshold< 1s Fast Transient Response to Short Current145mΩ Typical R...

AAT1138 Data Sheet

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Part Number:
AAT1138
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/24

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Product Details

Description



Specifications

  • VIN Range: 2.5V to 5.5 V
  • VOUT Range: 0.6V to VPVIN
  • System Current Limited Load Switch
    • Programmable Over-Current Threshold
    • < 1s Fast Transient Response to Short Current
    • 145mΩ Typical RDS(ON)
  • Step-Down Converter
    • Up to 2A Output Current
    • 95% Peak Efficiency
    • 1.2MHz Switching Frequency
    • 135mΩ Low RDS(ON) Internal Switches
    • 100% Duty Cycle Low Dropout Operation
    • Soft Start
  • Under-Voltage Lockout
  • Independent Enable Pins
  • <2A Shutdown Current
  • Over-Temperature and Current Limit Protection
  • Low Profile 16-pin 3mm x 4mm TDFN Package
  • -40C to 85C Temperature Range



Description

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The AAT1138 is a 2A synchronous step-down converter with an integrated current-limiting load switch designed for precise input current control applications. By guarding against excessive input current, the AAT1138 enables the system designer to maximize the output current from the step-down converter while protecting the input supply. It is designed for protection of 5V USB ports and 3.3V supplies from heavy load transient conditions commonly seen with high data rate modem applications.

The AAT1138 integrates a programmable current limited P-channel MOSFET load switch to protect the input supply against large currents which may cause the supply to fall out of regulation. Current limit threshold is programmed by an external resistor from SET to ground. It can be adopted to control loads of the input supply that requires up to 1.4A.

The AAT1138 internal step-down converter is a 2A, 1.2MHz constant frequency current mode PWM step-down converter. The step-down converter can run at 100% duty cycle for low dropout operation. The output voltage can be regulated as low as 0.6V.

The AAT1138 is available in a Pb-free, low profile, 16-pin 3mm x 4mm TDFN package. The product is rated over the -40C to 85C temperature range.


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