Diodes Incorporated AP2161DMPG-13

Overview

AP2161DMPG-13 from Diodes Incorporated is a single-channel, active-low enable, high-side USB power switch with integrated current limiting (1.5A typical), 90mΩ R_DS(ON) at 5V, and output discharge functionality. It operates from 2.7V–5.5V input, delivers controlled 0.6ms rise time, and provides over-current, thermal, short-circuit, and reverse-current protection - deployed in USB port power management for laptops and docking stations.

For engineers reviewing the AP2161DMPG-13 datasheet, AP2161DMPG-13 pinout, AP2161DMPG-13 application, or AP2161DMPG-13 equivalent, key selection criteria include enable polarity (active-low), 7ms FLG deglitch timing, 100Ω internal discharge resistance, thermal shutdown threshold (140°C), and package-specific thermal resistance (70°C/W for U-DFN2018-6).

Technical Context

The AP2161DMPG-13 implements a high-side NMOS power switch with slew-rate-controlled gate driver, UVLO activation at 1.9V (rising), and deglitched open-drain FLG reporting. Its current-limiting architecture uses an internal sense FET-not external resistors-enabling accurate 1.5A trip threshold without added path resistance.

Thermal protection activates at ~140°C junction temperature with 25°C hysteresis, forcing output cycling until fault removal. The discharge function engages on EN de-assertion via a dedicated 100Ω internal NMOS path to GND, enabling rapid V_OUT collapse (<0.6ms for 1µF load) without external components.

Key Specifications

Pinout & Package

AP2161DMPG-13 is packaged in U-DFN2018-6: 2.0mm × 1.8mm, 0.5mm pitch, exposed thermal pad (to be connected to GND plane). Pin 1 = FLG, Pin 2 = EN, Pin 3 = GND, Pin 4 = IN, Pin 5 = OUT, Pin 6 = OUT (dual OUT pins internally tied).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDBVR, AP2161DMPG-13 offers superior hot-plug safety via integrated discharge and reverse-current blocking; versus TUSB2036IRHBR, it delivers true power-switching capability rather than signal conditioning - making it the only direct fit for USB port power gating with protection.

Availability

AP2161DMPG-13 is available at Aetrix Electronics and suitable for USB 2.0 port management, laptop docking station power distribution, and set-top box peripheral interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AP2161DMPG-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for consumer, computing, and industrial markets.

The AP2161D/AP2171D product line targets USB-compliant hot-swap power switching - delivering integrated protection, precise current limiting, and compact packaging for space-constrained portable and embedded systems.

FAQ

What is the maximum continuous load current supported by AP2161DMPG-13?

The AP2161DMPG-13 is rated for 1A maximum continuous load current per the datasheet's Recommended Operating Conditions. Although its current limit is 1.5A typical, sustained operation above 1A requires careful thermal design due to package limitations - especially in U-DFN2018-6 where θ_JA is 70°C/W. Derating is advised above 60°C ambient.

Does AP2161DMPG-13 require external components for basic operation?

No external components are required for core switching functionality. A 0.1µF ceramic capacitor between IN and GND is recommended for stability, and a 10µF+ electrolytic capacitor on the output improves transient response. The 7ms FLG deglitch, 100Ω discharge path, and reverse-current blocking are fully internal - eliminating need for RC networks or external MOSFETs.

How does the FLG pin behave during a short-circuit event?

During a short circuit, the FLG pin goes low after a 7ms deglitch period and remains low as long as the over-current condition persists. If thermal shutdown activates (at ~140°C), FLG stays asserted until both over-current and over-temperature faults clear. Recovery is automatic once load impedance rises above the current-limit threshold and die temperature falls below 115°C (140°C – 25°C hysteresis).

Can AP2161DMPG-13 be used in dual-role USB ports (e.g., USB-C DRP)?

No - AP2161DMPG-13 is not recommended for dual-role ports such as USB-C DRP or MHL/HDMI hybrid ports. Its integrated discharge function actively drains the output when disabled, which would continuously discharge batteries in peripheral devices. For DRP applications, use dedicated USB-C power delivery controllers like FUSB302 or TUSB546 that support bidirectional VBUS control without forced discharge.