Diodes Incorporated AP2820DM-G1

Overview

AP2820DM-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 features 60 mΩ R_DS(ON), 2.0 A continuous load rating, 2.7–5.5 V input range, and integrated protections including over-current fold-back, thermal shutdown, UVLO, and soft-start. It is used in notebook motherboard USB hub power rails to prevent inrush damage and enable fault reporting to host controllers.

For engineers reviewing the AP2820DM-G1 datasheet, AP2820DM-G1 pinout, AP2820DM-G1 application, or AP2820DM-G1 equivalent, key selection criteria include active-low enable logic, absence of auto-discharge, 2.0 A current limit at 5 V, SOIC-8 package thermal resistance (135 °C/W), and FLAG pin deglitching behavior under OCP/OTP conditions.

Technical Context

The AP2820DM-G1 implements an N-channel MOSFET high-side switch driven by an internal charge pump, enabling full enhancement from 2.7 V input without external gate drive. Its protection architecture includes current-sense-based fold-back limiting, temperature-triggered shutdown at 150 °C with 30 °C hysteresis, and UVLO activation at 2.5 V (±0.2 V).

It uses a deglitched open-drain FLAG output that asserts low after 5–15 ms delay upon over-current or over-temperature fault detection, requiring external pull-up. The device supports no reverse current flow when disabled and provides 100–200 Ω internal output pull-down only on A/C/E/G variants - not applicable to DM-G1 (D = active-low, no auto-discharge).

Key Specifications

Pinout & Package

AP2820DM-G1 is supplied in SOIC-8 package (4.9 × 3.9 × 1.75 mm), with θ_JA = 135 °C/W, suitable for compact USB power rail layouts on notebook motherboards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDBVR and NIS5130MN3T1G, AP2820DM-G1 uniquely combines active-low enable, integrated deglitched FLAG, and SOIC-8 thermal performance - making it optimal for EC-controlled USB port management where GPIO polarity and fault visibility are constrained.

Availability

AP2820DM-G1 is available at Aetrix Electronics and suitable for USB power management, notebook motherboard designs, and hot-plug power supplies requiring stable component supply, RoHS-compliant green packaging, and long-term industrial lifecycle support.

Supply support for AP2820DM-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 and power IC designer specializing in high-reliability, cost-optimized solutions for consumer, computing, and industrial markets.

The AP2820 product line targets USB-compliant power distribution with integrated protection, emphasizing low R_DS(ON), precise current limiting, and robust fault signaling for embedded host systems.

FAQ

What is the function of the FLAG pin on AP2820DM-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 fault detection. It remains asserted until the fault clears and the device resets automatically after VIN re-enters UVLO window. No external latch is required, and a pull-up resistor must be provided per application circuit.

Does AP2820DM-G1 include auto-discharge functionality?

No. AP2820DM-G1 is explicitly designated as "Active Low without Auto Discharge" per the ordering guide. Unlike versions A/C/E/G, it does not integrate an internal discharge resistor between VOUT and GND. External RC networks or dedicated discharge FETs must be added if rapid VOUT decay is required after disable.

What is the maximum allowable input voltage for AP2820DM-G1?

The absolute maximum input voltage is 6.0 V, but recommended operating range is 2.7–5.5 V. Operation above 5.5 V risks permanent damage, and UVLO ensures the device remains off below 2.2 V. For USB 2.0 applications, 4.75–5.25 V is the typical valid input window.

How does the AP2820DM-G1 handle short-circuit conditions?

Under output short-to-GND, the device enters fold-back current limiting, reducing load current to ~1.18 A while maintaining regulation. Thermal shutdown activates if junction temperature exceeds 150 °C. FLAG asserts low after 5–15 ms delay, allowing host controller to disable EN and isolate the fault before thermal damage occurs.