Diodes Incorporated AP2820DMTR-G1

Overview

AP2820DMTR-G1 from BCD Semiconductor Manufacturing Limited is a high-side power distribution switch with active-low enable and open-drain fault flag, designed for USB-compliant hot-plug power control. It integrates an N-channel MOSFET with 60 mΩ R_DS(ON), over-current protection with fold-back, thermal shutdown, UVLO, and soft-start - delivering 2.0 A continuous load capability in SOIC-8 package at 2.7–5.5 V input.

For engineers reviewing the AP2820DMTR-G1 datasheet, AP2820DMTR-G1 pinout, AP2820DMTR-G1 application, or AP2820DMTR-G1 equivalent, this device supports precise current-limited USB port power switching, fault-aware system integration via FLAG signaling, and robust thermal/short-circuit protection in notebook and hub designs.

Technical Context

The AP2820DMTR-G1 implements a charge-pump-driven high-side N-MOSFET switch with programmable current limiting (2.2–3.2 A typical), fold-back short-circuit response, and deglitched open-drain FLAG output that asserts low within 5–15 ms of over-current or over-temperature events. Its UVLO threshold (2.2–2.7 V) ensures reliable turn-on only under valid supply conditions.

Soft-start limits inrush current during enable transition, while reverse-current blocking prevents backflow when disabled. The active-low EN pin directly interfaces with USB host controllers, and internal pull-low resistor on VOUT enables safe discharge after shutdown - specific to A/C/E/G versions including this D variant's SOIC-8 configuration.

Key Specifications

Pinout & Package

AP2820DMTR-G1 is housed in a RoHS-compliant SOIC-8 package (4.90 × 3.90 × 1.75 mm), optimized for surface-mount assembly and thermal dissipation in compact USB power domains.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side USB power switch applications.

Compared with TPS2051BDBVR and NIS5132MN, AP2820DMTR-G1 uniquely combines active-low EN, integrated deglitched FLAG, and USB-optimized 60 mΩ R_DS(ON) in a single SOIC-8 footprint - reducing BOM count and simplifying fault-handling firmware.

Availability

AP2820DMTR-G1 is available at Aetrix Electronics and suitable for USB power management, notebook motherboard designs, and hot-plug docking station development requiring stable component supply and long-term industrial lifecycle support.

Supply support for AP2820DMTR-G1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

BCD Semiconductor Manufacturing Limited is a Shanghai-based analog IC designer and foundry partner specializing in high-reliability power management and interface solutions for consumer and computing markets.

The AP2820 product line targets USB-compliant hot-plug power distribution, emphasizing low R_DS(ON), integrated protection, and direct host-controller interoperability - specifically engineered for notebook, hub, and docking applications.

FAQ

What is the function of the FLAG pin on AP2820DMTR-G1?

The FLAG pin is an open-drain output that pulls low (≤70 mV at 5 mA sink) within 5–15 ms of over-current or over-temperature events. It requires an external pull-up resistor and serves as a hardware interrupt signal to the USB host controller, enabling immediate port disable without software polling. Its deglitched design rejects sub-millisecond transients.

Does AP2820DMTR-G1 support reverse-current blocking?

Yes - the AP2820DMTR-G1 blocks reverse current (I_REVERSE ≤1.0 μA) when disabled and V_OUT > V_VIN. This prevents backfeed from downstream loads into the upstream supply, critical for safe hot-plug operation in USB hubs and docking stations where V_OUT may retain charge after disconnection.

What is the difference between AP2820DMTR-G1 and AP2820EMTR-G1?

AP2820DMTR-G1 is the active-low enable, 2.0 A continuous version without auto-discharge; AP2820EMTR-G1 is active-high enable, 2.5 A continuous with auto-discharge. Both use SOIC-8 packaging and share identical protection features, but differ in current rating, enable polarity, and presence of internal VOUT pull-down resistor (present only in A/C/E/G variants).

Is AP2820DMTR-G1 compliant with USB specifications?

Yes - its 60 mΩ R_DS(ON) ensures ≤120 mV voltage drop at 2.0 A, meeting USB 2.0 specification limits for bus-powered devices. Combined with soft-start, UVLO, and over-current fold-back, it satisfies USB compliance requirements for hot-plug power switching in hubs and peripherals.