Diodes Incorporated AP2820BMM-G1

Overview

AP2820BMM-G1 from BCD Semiconductor Manufacturing Limited 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 features 60 mΩ R_DS(ON), 2.0 A continuous load capability, under-voltage lockout (2.5 V typ.), and integrated thermal/over-current protection. Used in USB bus hubs and notebook motherboard power rails where controlled inrush current and fault reporting to host controllers are required.

For engineers reviewing the AP2820BMM-G1 datasheet, AP2820BMM-G1 pinout, AP2820BMM-G1 application, or AP2820BMM-G1 equivalent, this device supports precise USB voltage-drop compliance, logic-level enable interface, deglitched fault flag signaling, and MSOP-8 footprint compatibility with SOIC-8 alternatives.

Technical Context

The AP2820BMM-G1 integrates an N-channel MOSFET with charge-pump gate drive to achieve low on-resistance while operating from 2.7–5.5 V input. Its active-low enable pin directly interfaces with standard USB controller GPIOs without level-shifting.

Functional block includes soft-start circuitry limiting inrush current, fold-back over-current protection triggering at 2.7 A (typ.), and thermal shutdown at 150 °C with 30 °C hysteresis. The open-drain FLAG pin asserts low within 10 ms (typ.) of OCP/OTP events and requires external pull-up for USB controller monitoring.

Key Specifications

Pinout & Package

AP2820BMM-G1 is housed in an MSOP-8 package (4.7 mm × 3.1 mm, 0.65 mm pitch), optimized for space-constrained USB port and motherboard designs. Thermal resistance θ_JA is 150 °C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2036VFR and TPS2051BDBVR, AP2820BMM-G1 uniquely combines active-low enable, deglitched FLAG, fold-back short protection, and MSOP-8 footprint - making it optimal for USB-compliant discrete power rail control where fault visibility and robustness are prioritized over transceiver integration or lowest BOM count.

Availability

AP2820BMM-G1 is available at Aetrix Electronics and suitable for USB bus-powered hubs, notebook motherboard power rails, and battery-charger input switching requiring stable component supply, RoHS-compliant green packaging, and long-term industrial lifecycle support.

Supply support for AP2820BMM-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 mixed-signal IC designer and foundry partner, specializing in power management, USB interface, and high-reliability automotive-grade components.

The AP2820 product line targets USB-compliant power distribution with integrated protection - engineered specifically for hot-plug reliability in consumer and computing platforms where compact size, low R_DS(ON), and deterministic fault signaling are critical.

FAQ

What is the function of the FLAG pin on AP2820BMM-G1?

The FLAG pin is an open-drain output that pulls low during over-current, over-temperature, or under-voltage lockout events. It requires an external pull-up resistor (typically 4.7 kΩ to 3.3 V or 5 V) and delivers a deglitched 5–15 ms pulse to notify the host controller of fault conditions without false triggering from transient noise.

Does AP2820BMM-G1 include output discharge functionality?

No. AP2820BMM-G1 belongs to the "B" version (Active High without Auto Discharge), and unlike versions A/C/E/G, it does not integrate an internal VOUT pull-down resistor. External discharge circuitry must be added if rapid VOUT decay after shutdown is required.

Can AP2820BMM-G1 operate from a 3.3 V supply rail?

Yes. Its 2.7–5.5 V input range fully supports 3.3 V operation. At 3.3 V, R_DS(ON) remains ≤80 mΩ and current limit holds at 2.2–3.2 A, meeting USB voltage-drop requirements even with margin. Enable thresholds (VENL ≤1.0 V, VENH ≥1.6 V) ensure clean logic-level compatibility.

How does the soft-start feature limit inrush current?

The internal soft-start circuit controls gate ramp rate, resulting in a typical 500 μs output rise time. With a 2.2 μF input capacitor, peak inrush current is limited to under 1 A - preventing voltage droop on shared rails and avoiding false triggering of upstream over-current detectors.