Diodes Incorporated AP2820FM-G1

Overview

AP2820FM-G1 from BCD Semiconductor Manufacturing Limited is a high-side power distribution switch with active-high enable and open-drain FLAG output, designed for USB-compliant hot-plug power control. It features 60 mΩ R_DS(ON), 2.5 A continuous load capability, 2.7–5.5 V operating range, and integrated protections including over-current fold-back, thermal shutdown, UVLO, and soft-start. Used in notebook motherboard USB hubs to regulate bus power delivery under dynamic load conditions.

For engineers reviewing the AP2820FM-G1 datasheet, AP2820FM-G1 pinout, AP2820FM-G1 application, or AP2820FM-G1 equivalent, key selection criteria include logic-level enable polarity (active-high), absence of auto-discharge, 2.5 A current rating, SOIC-8 package compatibility, and FLAG fault signaling for USB controller coordination.

Technical Context

The AP2820FM-G1 integrates an N-channel MOSFET with charge pump gate drive to maintain low R_DS(ON) across its 2.7–5.5 V input range. Its active-high EN pin directly interfaces with 3.3 V or 5 V logic without level-shifting, and the deglitched open-drain FLAG pin asserts low within 5–15 ms of over-current or over-temperature events.

It implements fold-back current limiting that reduces short-circuit current to 1.18 A while maintaining thermal shutdown at 150 °C with 30 °C hysteresis. The device draws only 80 μA typical supply current and shuts down to ≤1.0 μA, with no reverse current flow when disabled.

Key Specifications

Pinout & Package

AP2820FM-G1 is housed in a green, RoHS-compliant SOIC-8 package (4.90 × 3.90 × 1.75 mm) with standard 1.27 mm pitch, suitable for automated assembly and IPC Class 2/3 reliability requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDBVR, AP2820FM-G1 delivers higher current capacity and integrated fault signaling; versus AP2820EM-G1, it omits auto-discharge to reduce quiescent leakage and simplify biasing in always-on configurations.

Availability

AP2820FM-G1 is available at Aetrix Electronics and suitable for USB power management, notebook motherboard PC designs, and hot-plug peripheral adapters requiring stable component supply, long-term lifecycle support, and green RoHS-compliant packaging.

Supply support for AP2820FM-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 fabless analog IC designer specializing in power management, LED drivers, and high-voltage process technologies since 2003.

The AP2820 product line targets USB-compliant power distribution in portable and embedded systems, emphasizing low R_DS(ON), robust fault protection, and qualification for consumer and industrial end-equipment certifications.

FAQ

What is the maximum continuous output current rating for AP2820FM-G1?

The AP2820FM-G1 is rated for 2.5 A continuous output current under recommended operating conditions (VIN = 2.7–5.5 V, TA = –40 to +85 °C). This rating applies specifically to E/F/G/H versions and is validated with thermal derating curves showing stable operation up to 85 °C ambient with adequate PCB copper area.

Does AP2820FM-G1 include auto-discharge functionality?

No. AP2820FM-G1 is the "Active High without Auto Discharge" variant (Condition F). It does not integrate an internal VOUT pull-down resistor. For auto-discharge capability, select AP2820EM-G1 (Condition E) or AP2820GM-G1 (Condition G), which feature 100–200 Ω internal discharge paths.

Can AP2820FM-G1 be used with 3.3 V logic control signals?

Yes. Its EN pin has a guaranteed V_ENH threshold of ≥1.6 V and V_ENL ≤1.0 V, making it fully compatible with 3.3 V CMOS logic. With 3.3 V applied to EN, the device reliably turns on; with 0 V, it remains off with ≤1.0 μA shutdown current.

What protection features are implemented in AP2820FM-G1?

AP2820FM-G1 integrates over-current protection with fold-back limiting (1.18 A short-circuit current), thermal shutdown at 150 °C, under-voltage lockout (2.2–2.7 V), soft-start to limit inrush, and reverse-current blocking. All protections trigger FLAG assertion and are fully autonomous-no external components required.