Diodes Incorporated AP2820CMM-G1

Overview

AP2820CMM-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 management. It integrates an N-channel MOSFET with 60 mΩ R_DS(ON), over-current protection with fold-back, thermal shutdown, under-voltage lockout (2.5 V threshold), and soft-start-enabling reliable 2.0 A continuous load switching in notebook and motherboard USB hub applications.

For engineers reviewing the AP2820CMM-G1 datasheet, AP2820CMM-G1 pinout, AP2820CMM-G1 application, or AP2820CMM-G1 equivalent, key selection criteria include active-low enable logic, 2.0 A guaranteed current rating, MSOP-8 package thermal performance, FLAG timing delay (5–15 ms), and output discharge resistor integration (100–200 Ω) for safe power-down sequencing.

Technical Context

The AP2820CMM-G1 implements a charge-pump–driven high-side N-MOSFET architecture to maintain low on-resistance across 2.7–5.5 V input range. Its fold-back over-current protection reduces short-circuit power dissipation, while deglitched open-drain FLAG output provides robust fault signaling to host controllers without external filtering.

Thermal shutdown activates at 150 °C with 30 °C hysteresis, and UVLO ensures turn-on only above 2.5 V with 0.2 V hysteresis. The integrated output pull-low resistor (100–200 Ω) discharges VOUT after shutdown-eliminating need for external discharge circuitry in A/C/E/G versions like this one.

Key Specifications

Pinout & Package

AP2820CMM-G1 is housed in a thermally enhanced MSOP-8 package (4.7 × 3.1 mm, 0.65 mm pitch), optimized for space-constrained USB port designs requiring efficient heat dissipation at 2.0 A load.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDBVR and NIS5132MN, AP2820CMM-G1 uniquely combines active-low enable, integrated discharge resistor, and deglitched FLAG in MSOP-8-reducing BOM count and enabling compact, self-contained USB port protection without external support components.

Availability

AP2820CMM-G1 is available at Aetrix Electronics and suitable for USB bus-powered hubs, notebook USB port management, and hot-plug power supplies requiring stable component supply, RoHS-compliant green packaging, and long-term industrial lifecycle support.

Supply support for AP2820CMM-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-designed specifically for space-constrained, thermally sensitive applications such as portable computing and peripheral docking systems.

FAQ

What is the function of the FLAG pin on AP2820CMM-G1?

The FLAG pin is an open-drain fault indicator that pulls low during over-current, over-temperature, or under-voltage lockout events. It features built-in deglitching (5–15 ms delay) to reject transient noise and requires an external pull-up resistor to the host controller's GPIO or interrupt pin for reliable fault detection and system-level response.

Does AP2820CMM-G1 require an external capacitor for stable operation?

Yes-per the datasheet, a minimum 2.2 μF ceramic input capacitor (CIN) is required between VIN and GND for stability. For applications with frequent VOUT short-to-ground events, a larger 22 μF input capacitor is recommended to maintain regulation and avoid false UVLO triggering during recovery.

How does the soft-start feature limit inrush current?

The AP2820CMM-G1 uses internal soft-start circuitry to ramp the gate voltage of its N-channel MOSFET over ~500 μs, limiting peak inrush current to safe levels during power-up. This prevents voltage droop on shared USB VBUS rails and avoids tripping upstream current-limiting circuits in host systems.

Is the output discharge resistor present in all AP2820 variants?

No-the 100–200 Ω internal output pull-low resistor is only included in A/C/E/G versions (active-high or active-low with auto-discharge). AP2820CMM-G1 belongs to the C-series (active-low with auto-discharge), so it includes this resistor-enabling automatic VOUT discharge after shutdown without external components.