AP2821 Datasheet Text
Advance Datasheet
High-side Power Distribution Switch with Enable
AP2821
General Description
The AP2821 is an integrated high-side power switch that consists of TTL patible 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, over-current protection with fold-back, and thermal shutdown to avoid switch failure during hot plug-in. Under voltage lockout (UVLO) function is used to ensure the device remain 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 disable.
The AP2821 is available in standard package of SOT-23-5.
Features
- Low MOSFET on Resistance: 120mΩ @VIN=5.0V
- pliant to USB Specifications
- Operating Voltage Range: 2.7V to 5.5V
- Low Supply Current: 35μA (Typ.)
- Low Shutdown Current: <1μA
- Current Limit with Fold-back: 2A
- Under-voltage Lockout
- Soft Start-up
- Over-current Protection
- Over Temperature Protection
- Load Short Protection with Fold-back
- 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
Mar. 2013 Rev 2. 0
SOT-23-5
Figure 1. Package Type of AP2821 BCD Semiconductor Manufacturing Limited...