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AP2821 (Obsolete)

High-Side Power Distribution Switch With Enable

Datasheet

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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.

Application(s)

USB Power Management

USB Bus/Self Powered Hubs

Hot-plug Power Supplies

Battery-charger Circuits

Notebooks, Motherboard PCs

Specifications & Technical Documents

Product Parameters

(MAX) Maximum Current Limit Fixed (A)	2.8
(TYP) Output Rise Time mS	1.9
Adjustable Current Limit	No
AEC Qualified	No
Channels	1
Compliance (Only Automotive Supports PPAP)	Standard
Enable Logic	Active High
Maximum Continuous Output Current	1.5
Maximum Continuous Output Current (A)	1.5
Maximum Current Limit	2.8
Maximum Operating Voltage	5.5
Maximum Operating Voltage (V)	5.5
Maximum Power Supply Voltage (V)	5.5
Minimum Operating Voltage (V)	2.7
Minimum Operating Voltage (V)	2.7
Minimum Power Supply Voltage (V)	2.7
NEMKO IEC 60950-1 CB	Pending
OCP Flag	No
OCP Output Latch Off	No
Operating Ambient Temperature Range (°C)	-40 to 85
Output Discharge	Yes
Overtemperature Protection	Yes
Power Good	No
Quiescent Current Typ (μA)	35
Quiescent Current Typ (μA)	35
R_DS(ON) (V_IN = 5V) Typ	120
RDS(ON) (VIN = 5V) Typ (mΩ)	120
Reverse Current Block	Yes
Type	OCP Switch
UL Certificate	No
UL Listed	Pending

Technical Documents

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

RoHSFile

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products
PCN-2672	2024-03-11	2024-09-07	Device End of Life (EOL)