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RT9728B - 1.8A Power Switch

Description

The RT9728B is a cost effective, low voltage, single P-MOSFET power switch IC for USB application with a adjustable current limit feature.

Low switch-on resistance (typ.

120mΩ) and low supply current (typ.

Features

  • ±10% Current Limit Accuracy @ 1.3A.
  • Adjustable Current Limit : 75mA to 1.8A (typ. ).
  • Meet USB Current Limiting Requirements.
  • Operating Voltage Range : 2.5V to 5.5V.
  • Reverse Input.
  • Output Voltage Protection.
  • Built-in Soft-Start.
  • 120mΩ P-MOSFET.
  • 120μA Supply Current.
  • 15-kV ESD Protection per IEC 61000-4-2 (With External Capacitance).
  • Nemko Approved IEC62368-1.
  • RoHS Compliant and Halogen Free Ordering Information RT9728B Package Type E.

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Datasheet preview – RT9728B

Datasheet Details

Part number RT9728B
Manufacturer Richtek
File Size 211.39 KB
Description 1.8A Power Switch
Datasheet download datasheet RT9728B Datasheet
Additional preview pages of the RT9728B datasheet.

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Full PDF Text Transcription

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® RT9728B 120mΩ, 1.8A Power Switch with Adjustable Current Limit General Description The RT9728B is a cost effective, low voltage, single P-MOSFET power switch IC for USB application with a adjustable current limit feature. Low switch-on resistance (typ. 120mΩ) and low supply current (typ. 120μA) are realized in this IC. The RT9728B offers a adjustable current limit threshold between 75mA and 1.8A (typ.) via an external resistor. The ±10% current limit accuracy can be realized for all current limit settings. In addition, a flag output is available to indicate fault conditions to the local USB controller. Furthermore, the chip also integrates an embedded delay function to prevent mis-operation due to high inrush current.
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