Diodes Incorporated AP2151MPG-13

Overview

AP2151MPG-13 from Diodes Incorporated is a single-channel, active-high enable, current-limited high-side power switch optimized for USB 2.0-compliant hot-swap applications. It delivers 0.5A continuous load current with 95mΩ typical R_DS(ON), 0.8A accurate current limiting, and integrated short-circuit/thermal protection. Used in USB ports of laptops, docking stations, and set-top boxes to control power delivery while preventing inrush surges and fault propagation.

For engineers reviewing the AP2151MPG-13 datasheet, AP2151MPG-13 pinout, AP2151MPG-13 application, or AP2151MPG-13 equivalent, key selection criteria include enable polarity (active-high), 7ms FLG deglitch timing, reverse current blocking capability, UVLO threshold at 1.9V, and thermal shutdown at +140°C - all critical for robust USB port power management design.

Technical Context

The AP2151MPG-13 implements a monolithic N-channel MOSFET high-side switch with integrated current-sense FET, thermal sensing circuitry, and UVLO comparator. Its internal deglitch logic on the open-drain FLG output ensures fault reporting only after ≥7ms sustained over-current or over-temperature condition, eliminating false triggers from capacitive load transients.

It features controlled 0.6ms typical rise time and reverse current blocking during disable state. The device operates across 2.7V–5.5V input range, supports ambient temperatures from –40°C to +85°C, and maintains stable current limiting (0.6–1.0A) across temperature and voltage variations without external components.

Key Specifications

Pinout & Package

AP2151MPG-13 is packaged in MSOP-8EP (exposed pad), offering enhanced thermal performance (θ_JA = 60°C/W) versus standard SO-8 or SOT25 variants. The exposed pad must be soldered to PCB ground plane for optimal thermal dissipation but is not an electrical ground path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2036IRHBR and TPS2051BDBVR, the AP2151MPG-13 uniquely combines active-high enable, reverse current blocking, and factory-trimmed 7ms FLG deglitch in a thermally enhanced MSOP-8EP package - making it optimal for space-constrained, single-port USB power control where reliability and minimal BOM count are critical.

Availability

AP2151MPG-13 is available at Aetrix Electronics and suitable for USB 2.0 host ports, laptop docking stations, and set-top box peripheral interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP2151MPG-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 high-reliability power management, signal integrity, and protection solutions for consumer, computing, and industrial markets.

The AP2151 belongs to Diodes' USB Power Switch product line, engineered specifically for robust, low-component-count hot-swap power control in USB 2.0-compliant systems - emphasizing fault resilience, thermal autonomy, and seamless integration with host controllers.

FAQ

What is the maximum continuous load current supported by AP2151MPG-13?

The AP2151MPG-13 is rated for 0.5A maximum continuous load current per its Recommended Operating Conditions table. Although its current-limit threshold is 0.8A typical, sustained operation above 0.5A risks exceeding thermal limits in the MSOP-8EP package without aggressive PCB copper area and thermal vias - hence the derated 0.5A rating ensures reliable operation across –40°C to +85°C ambient.

Does AP2151MPG-13 require external components for basic USB port protection?

No external components are required for core functionality: current limiting, thermal shutdown, UVLO, and FLG reporting operate autonomously. However, Diodes recommends a 0.01–0.1μF ceramic capacitor between IN and GND, plus ≥10μF electrolytic capacitance on the output, to suppress transients and ensure stable current-limit response during hot-plug events.

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

Upon detecting sustained over-current (≥7ms), the FLG pin pulls low via an internal 20–40Ω NMOS FET. It remains low until both over-current and over-temperature conditions clear. During recovery, FLG returns high only after the output current drops below the trip threshold and junction temperature falls below the hysteresis threshold (+115°C), ensuring stable re-enabling.

Can AP2151MPG-13 be used in dual-role USB ports (e.g., USB-C DRP)?

No - Diodes explicitly advises against using AP2151 in dual-purpose ports where the same connector handles both data communication and battery charging (e.g., HDMI/MHL shared ports). Back-voltage on the OUT pin while disabled, followed by VIN ramp-up, may overstress internal structures due to lack of bidirectional blocking or charge-pump-assisted gate drive.