Diodes Incorporated AP2820HMMTR-G1

Overview

AP2820HMMTR-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), supports 2.5 A continuous load, operates from 2.7 V to 5.5 V, and includes over-current protection, thermal shutdown, UVLO, and soft-start - deployed in notebook motherboard USB hub power rails.

For engineers reviewing the AP2820HMMTR-G1 datasheet, AP2820HMMTR-G1 pinout, AP2820HMMTR-G1 application, or AP2820HMMTR-G1 equivalent, key selection criteria include its active-low enable logic, 2.5 A current rating (H-version), MSOP-8 package thermal performance, deglitched FLAG response timing (5–15 ms), and absence of reverse current during shutdown.

Technical Context

The AP2820HMMTR-G1 implements a charge-pump–driven high-side N-MOSFET switch with fold-back over-current limiting and thermal foldback. Its UVLO threshold is 2.2–2.7 V with 0.2 V hysteresis, and it triggers thermal shutdown at 150 °C with 30 °C hysteresis.

It features deglitched open-drain FLAG output (active-low, <70 mV low voltage at 5 mA sink), 500 µs turn-on time, and integrated output pull-low resistor (100–200 Ω) for controlled discharge during disable - critical for USB bus compliance and safe hot-plug sequencing.

Key Specifications

Pinout & Package

AP2820HMMTR-G1 is packaged in MSOP-8 (4.7 × 3.1 mm, 0.65 mm pitch), optimized for space-constrained USB power rail layouts on notebook motherboards and compact peripheral PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDBVR and TPS22965DSGR, the AP2820HMMTR-G1 uniquely combines 2.5 A capability, integrated FLAG diagnostics, UVLO, thermal hysteresis, and factory-trimmed discharge resistance - reducing BOM count and qualification effort for USB-compliant embedded power rails.

Availability

AP2820HMMTR-G1 is available at Aetrix Electronics and suitable for USB self-powered hubs, notebook motherboard power rails, and hot-plug peripheral supplies requiring stable component supply, RoHS-compliant green packaging, and long-term industrial lifecycle support.

Supply support for AP2820HMMTR-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 computing, consumer, and industrial markets.

The AP2820 product line targets USB-compliant power distribution with integrated protection - engineered specifically for space-constrained, thermally demanding motherboard and peripheral applications requiring zero-reverse-current and fast fault reporting.

FAQ

What is the function of the FLAG pin on AP2820HMMTR-G1?

The FLAG pin is an open-drain, deglitched fault indicator that pulls low (≤70 mV at 5 mA sink) during over-current, over-temperature, or under-voltage lockout events. It requires an external pull-up resistor and provides 5–15 ms delay to reject transient faults - enabling reliable communication with USB host controllers without additional filtering circuitry.

Does AP2820HMMTR-G1 support reverse current blocking when disabled?

Yes. When disabled, AP2820HMMTR-G1 blocks reverse current from VOUT to VIN with leakage ≤1.0 µA, even when VOUT exceeds VIN. This is achieved through internal MOSFET gate control and verified across -40°C to 85°C ambient temperature - critical for preventing backfeed in multi-rail USB systems.

How does the soft-start feature limit inrush current?

The soft-start circuit ramps the output voltage over 500 µs, limiting peak inrush current to <2 A under worst-case 220 µF output capacitance. This prevents tripping of upstream USB port current limits and satisfies USB 2.0 specification requirements for hot-plug insertion without disrupting host enumeration.

Is AP2820HMMTR-G1 compatible with both 2.0 A and 2.5 A load versions?

No. AP2820HMMTR-G1 is specifically the 2.5 A version (H-suffix), with guaranteed current limit of 2.8–4.2 A and matched R_DS(ON) characterization. The 2.0 A versions (A–D) have different current-limit thresholds and are not interchangeable without revalidation of thermal and protection margins.