Advance Datasheet High-side Power Distribution Switch with Enable AP2821 General Description Features The AP2821 is an integrated high-side power switch Low MOSFET on Resistance: 120m that consists of TTL compatible enables input, a V =5.0V IN charge pump, and N-Channel MOSFET. The switchs Compliant to USB Specifications low RDS (ON), 120m, meets USB voltage drop Operating Voltage Range: 2.7V to 5.5V requirements. It includes soft-start to limit inrush Low Supply Current: 35A (Typ.) current, over-current protection with fold-back, and Low Shutdown Current: <1A thermal shutdown to avoid switch failure during hot Current Limit with Fold-back: 2A plug-in. Under voltage lockout (UVLO) function is Under-voltage Lockout used to ensure the device remain off unless there is a Soft Start-up valid input voltage present. And no reverse current Over-current Protection when power off, with shutdown pull-low resistor to Over Temperature Protection discharge the output capacitor when EN is disable. Load Short Protection with Fold-back No Reverse Current when Power off The AP2821 is available in standard package of Pass System ESD: IEC61000-4-2 SOT-23-5. 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 SOT-23-5 Figure 1. Package Type of AP2821 Mar. 2013 Rev 2. 0 BCD Semiconductor Manufacturing Limited 1 Advance Datasheet High-side Power Distribution Switch with Enable AP2821 Pin Configuration K Package SOT-23-5 Figure 2. Pin Configuration of AP2821 (Top View) Pin Descriptions Pin No. Name Descriptions 1 VOUT Switch Output Voltage 2 GND Ground 3 EN Chip Enable Control Input, Active High 4, 5 VIN Supply Input Pin Mar. 2013 Rev 2. 0 BCD Semiconductor Manufacturing Limited 2