AP2821KTR-G1 36V 2A Single-Channel Load Switch Ultra-Low 60mΩ Rds(on) 1.2V to 5.5V Logic Fast 20μs Startup True Reverse Current Blocking Thermal & Current Protection -40°C to +125°C

AP2821KTR-G1 36V 2A Single-Channel Load Switch Ultra-Low 60mΩ Rds(on) 1.2V to 5.5V Logic Fast 20μs Startup True Reverse Current Blocking Thermal & Current Protection -40°C to +125°C

Features

• Low MOSFET On-Resistance: 120mΩ@VIN = 5.0V

• Compliant to USB Specifications

• Operating Voltage Range: 2.7V to 5.5V

• Low Supply Current: 35µA (typ)

• Low Shutdown Current: < 1µA

• Current Limit with Foldback: 2A

• Undervoltage Lockout

• Soft Startup

• Overcurrent Protection

• Overtemperature Protection

• Load Short Protection with Foldback

• No Reverse Current when Power Off

• Pass System ESD: IEC61000-4-2 ±16kV (Air Discharge) and ±8kV (Contact Discharge) on USB Connector

Applications

• USB power management

• USB bus/self-powered hubs

• Hot-plug power supplies

• Battery-charger circuits

• Notebooks, motherboard PCs

Description

The AP2821 is an integrated high-side power switch that consists of TTL compatible enables input, a charge pump, and n-channel MOSFET. The switch’s low RDS(ON), 120mΩ, meets USB voltage drop requirements. It includes soft-start to limit inrush current, overcurrent protection with fold-back, and thermal shutdown to avoid switch failure during hot plug-in. Undervoltage lockout (UVLO) function is used to ensure the device remains off unless there is a valid input voltage present. And no reverse current when power off, with shutdown pull-low resistor to discharge the output capacitor when EN is disabled.

INFORMATION

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