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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
| Category | | |
| Mfr | | |
| Series | - | |
| Packaging | Tape & Reel (TR) Cut Tape (CT) Digi-Reel® | |
| Part Status | Obsolete | |
| Switch Type | | |
| Number of Outputs | 1 | |
| Ratio - Input:Output | 1:1 | |
| Output Configuration | High Side | |
| Output Type | N-Channel | |
| Interface | On/Off | |
| Voltage - Load | 2.7V ~ 5.5V | |
| Voltage - Supply (Vcc/Vdd) | Not Required | |
| Current - Output (Max) | 1.5A | |
| Rds On (Typ) | 120mOhm | |
| Input Type | Non-Inverting | |
| Features | Slew Rate Controlled | |
| Fault Protection | Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO | |
| Operating Temperature | -40°C ~ 85°C (TA) | |
| Mounting Type | Surface Mount | |
| Supplier Device Package | SOT-23-5 | |
| Package / Case | | |
| Base Product Number |
Drawing
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