Diodes AP2821 - Manual

Advance Datasheet
High-side Power Distribution Switch with Enable AP2821
Mar. 2013 Rev 2. 0 BCD Semiconductor Manufacturing Limited
1
General 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), 120m
Ω, 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: 120m
Ω
@V
IN
=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 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
Figure 1. Package Type of AP2821
SOT-23-5