Diodes Incorporated AP2820GM-G1

Overview

AP2820GM-G1 from BCD Semiconductor is a high-side power distribution switch with active-low enable and open-drain FLAG output, designed for USB-compliant hot-plug power control. It integrates an N-channel MOSFET (R_DS(ON) = 60 mΩ), charge pump, over-current protection with fold-back, thermal shutdown, UVLO, and soft-start. It delivers 2.5 A continuous load current and operates from 2.7 V to 5.5 V, targeting USB bus/self-powered hubs and notebook motherboard power rails.

For engineers reviewing the AP2820GM-G1 datasheet, AP2820GM-G1 pinout, AP2820GM-G1 application, or AP2820GM-G1 equivalent, key selection criteria include guaranteed 2.5 A continuous current capability, active-low enable logic, absence of auto-discharge, SOIC-8 packaging, and deglitched FLAG signaling for OCP/OTP fault reporting to USB controllers.

Technical Context

The AP2820GM-G1 implements a charge-pump–driven high-side N-MOSFET architecture enabling rail-to-rail input operation down to 2.7 V while maintaining low R_DS(ON). Its current-limit threshold is fixed at 2.8–4.2 A (typ. 3.4 A) under V_OUT = 4.0 V, with fold-back short-circuit response limiting I_SHORT to 1.18 A.

It features a deglitched open-drain FLAG output with 5–15 ms delay to over-current or over-temperature events, and includes UVLO (2.2–2.7 V threshold, 0.2 V hysteresis) plus thermal shutdown at 150 °C (30 °C hysteresis). The device draws only 80 μA typical supply current and 1.0 μA max shutdown current.

Key Specifications

Pinout & Package

AP2820GM-G1 is supplied in SOIC-8 package (4.90 mm × 3.91 mm × 1.75 mm), RoHS-compliant and green (G1 suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDBVR and NIS5130MN3TXG, AP2820GM-G1 uniquely combines 2.5 A current capability, active-low enable, open-drain FLAG with deglitching, and no auto-discharge - making it optimal for USB host controllers needing precise fault timing and deterministic power sequencing.

Availability

AP2820GM-G1 is available at Aetrix Electronics and suitable for USB power management, notebook motherboard rail switching, and hot-plug peripheral power control requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AP2820GM-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 and foundry partner, specializing in high-reliability, cost-optimized power management solutions for consumer, computing, and industrial markets.

The AP2820 product line targets USB-compliant high-side power distribution with integrated protection, addressing demand for compact, certified, and feature-rich switches in space-constrained portable and embedded platforms.

FAQ

What is the function of the FLAG pin on AP2820GM-G1?

The FLAG pin is an open-drain, active-low fault indicator that asserts low within 5–15 ms of over-current or over-temperature events. It requires an external pull-up resistor to the host controller's logic rail and provides a hardware-level signal for immediate fault response without software polling. Its deglitched design prevents false triggering from transient noise.

Does AP2820GM-G1 include reverse current blocking?

Yes - AP2820GM-G1 blocks reverse current flow from VOUT to VIN when disabled, eliminating backfeed risk in multi-source systems. This is achieved through internal MOSFET body diode control and gate drive logic, ensuring isolation even when downstream loads remain powered.

How does the soft-start feature limit inrush current?

The internal soft-start circuit controls the MOSFET gate ramp rate, limiting output voltage slew to ~1 V/ms. This restricts peak inrush current to under 1 A during hot-plug events, preventing USB port over-current trips and reducing stress on input capacitors and upstream power sources.

Is AP2820GM-G1 compatible with both SOIC-8 and MSOP-8 footprints?

No - AP2820GM-G1 is specifically packaged in SOIC-8 (not MSOP-8). The "G" in the part number denotes active-low enable and 2.5 A rating, while "M" indicates SOIC-8 packaging. MSOP-8 variants carry "MM" in the part number (e.g., AP2820GMM-G1) and are mechanically incompatible with SOIC-8 land patterns.