Diodes Incorporated AP2815BM-G1

Overview

AP2815BM-G1 from BCD Semiconductor is a 1.5A high-side power distribution switch with integrated N-channel MOSFET (R_DS(ON) = 60 mΩ @ 5V), enable control, and deglitched open-drain FLAG output for fault reporting. It operates from 2.7V to 5.5V, supports USB-compliant hot-plug power management in notebook motherboards and self-powered hubs, and includes over-current protection with fold-back, thermal shutdown, and under-voltage lockout.

For engineers reviewing the AP2815BM-G1 datasheet, AP2815BM-G1 pinout, AP2815BM-G1 application, or AP2815BM-G1 equivalent, this device is selected for USB power rail switching where low voltage drop (<250 mV at 1.5A), precise current limiting (1.65–2.8A), and reliable fault signaling via FLAG are required in SOIC-8 packaged solutions.

Technical Context

The AP2815BM-G1 implements a charge-pump–driven high-side N-MOSFET switch with soft-start to limit inrush current and fold-back current limiting during output short-to-ground events. Its logic-level enable input is active-high (Condition B), and it lacks auto-discharge functionality-unlike Condition A/C variants-so external discharge paths must be provided.

FLAG output is open-drain with deglitching (5–15 ms delay), asserting low on over-current or over-temperature faults. UVLO activates below 2.2–2.7 V with 0.2 V hysteresis, and reverse current is blocked (<1 µA) when disabled, eliminating backfeed from VOUT to VIN.

Key Specifications

Pinout & Package

AP2815BM-G1 is housed in an industry-standard SOIC-8 package (4.90 × 3.90 × 1.75 mm), RoHS-compliant and green (G1 suffix), suitable for reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDBVR and NIS5132MN3TXG, AP2815BM-G1 uniquely combines USB-optimized R_DS(ON), deglitched FLAG reporting, and SOIC-8 compatibility-making it optimal for cost-sensitive, fault-aware USB power rails requiring minimal external components.

Availability

AP2815BM-G1 is available at Aetrix Electronics and suitable for USB power management, notebook motherboard designs, and hot-plug power supplies requiring stable component supply across industrial temperature ranges (−40°C to +85°C).

Supply support for AP2815BM-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-efficiency, safety-certified power management solutions for consumer and computing markets.

The AP2815 product line targets USB-compliant power distribution with integrated protection, emphasizing low R_DS(ON), precise current limiting, and robust fault signaling for portable and host-system applications.

FAQ

What is the function of the FLAG pin on AP2815BM-G1?

The FLAG pin is an open-drain output that pulls low during over-current or over-temperature faults, with built-in deglitching (5–15 ms delay) to reject noise. It requires an external pull-up resistor and interfaces directly with microcontrollers or USB hub controllers for real-time fault reporting without software polling.

Does AP2815BM-G1 include auto-discharge functionality?

No. AP2815BM-G1 is Condition B (Active High without Auto Discharge), meaning it does not integrate an internal discharge path from VOUT to GND upon disable. An external resistor or FET must be added if rapid VOUT discharge is required after shutdown.

How does the UVLO feature behave during power-up?

UVLO holds the switch off until VIN rises above 2.2–2.7 V, then enables operation. When VIN falls, the switch remains on until VIN drops below the lower threshold (≈2.0–2.5 V due to 0.2 V hysteresis), preventing chattering near the trip point during brown-out conditions.

Can AP2815BM-G1 be used with 3.3V logic enable signals?

Yes. The EN pin accepts logic-high inputs from 1.6 V to 5.5 V, making it compatible with 3.3V GPIOs without level-shifting. Input current is ±1.0 µA, ensuring minimal loading on driving sources across temperature.