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Diodes Semiconductor Electronic Components Datasheet

AP2821 Datasheet

High-side Power Distribution Switch

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High-side Power Distribution Switch with Enable
AP2821
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), 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
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
Mar. 2013 Rev 2. 0
SOT-23-5
Figure 1. Package Type of AP2821
BCD Semiconductor Manufacturing Limited
1


Diodes Semiconductor Electronic Components Datasheet

AP2821 Datasheet

High-side Power Distribution Switch

No Preview Available !

High-side Power Distribution Switch with Enable
Pin Configuration
K Package
SOT-23-5
Advance Datasheet
AP2821
Figure 2. Pin Configuration of AP2821 (Top View)
Pin Descriptions
Pin No.
1
2
3
4, 5
Name
VOUT
GND
EN
VIN
Descriptions
Switch Output Voltage
Ground
Chip Enable Control Input, Active High
Supply Input Pin
Mar. 2013 Rev 2. 0
BCD Semiconductor Manufacturing Limited
2


Part Number AP2821
Description High-side Power Distribution Switch
Maker BCD
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AP2821 Datasheet PDF






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