Skyworks Solutions Inc. AAT4295IJS-T1

Overview

AAT4295IJS-T1 from Skyworks Solutions is a three-channel low-side N-channel MOSFET RGB LED controller IC designed for portable fashion lighting applications. It operates from 1.8V to 5.5V, delivers ≤6.0 Ω R_DS(ON) at 5V, consumes 3 μA quiescent current in active mode, and uses a single GPIO S2Cwire™ interface to configure all outputs - enabling compact, GPIO-efficient designs in space-constrained mobile devices.

For engineers reviewing the AAT4295IJS-T1 datasheet, AAT4295IJS-T1 pinout, AAT4295IJS-T1 application, or AAT4295IJS-T1 equivalent, key selection criteria include its SC70JW-8 package footprint, 3-channel low-side switching architecture, S2Cwire serial control timing (≤75 μs latch timeout), thermal dissipation limit of 440 mW at 25°C, and compatibility with common-anode RGB LEDs requiring ground-switched current paths.

Technical Context

The AAT4295IJS-T1 integrates three independent low-side N-channel MOSFETs with gate drive logic controlled exclusively via the EN/SET pin using Skyworks' proprietary S2Cwire™ serial interface - no external clock or data lines required. Each switch supports continuous load currents up to 271 mA per channel at 25°C ambient when all channels are active, limited by package thermal resistance (θ_JA = 225°C/W) and R_DS(ON) temperature coefficient (2800 ppm/°C).

It implements an 8-state internal counter decoded from rising edges on EN/SET, with default activation on first rising edge (all switches ON), and full shutdown (<1 μA supply current) when EN/SET is held low for ≥500 μs. The device requires no external components for basic operation and is rated for –40°C to +85°C industrial temperature range.

Key Specifications

Pinout & Package

Package: SC70JW-8 (8-pin, 2.1 mm × 2.0 mm, 0.5 mm height, Pb-free, moisture-sensitive level 1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side RGB LED switching applications.

Compared with TPS22965DSGR and AP22851W5-7, the AAT4295IJS-T1 uniquely combines three-channel integration, S2Cwire serial programming, and sub-2 Ω R_DS(ON) in an SC70JW-8 package - delivering superior GPIO efficiency and lighting flexibility without sacrificing thermal performance or voltage range.

Availability

AAT4295IJS-T1 is available at Aetrix Electronics and suitable for RGB fashion lighting, keypad backlighting, and indicator lamp control requiring stable component supply across consumer electronics production cycles.

Supply support for AAT4295IJS-T1 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

Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions for wireless, automotive, and industrial markets.

The AAT4295IJS-T1 belongs to Skyworks' Application Specific Power MOSFET (ASPM™) family, engineered to replace discrete MOSFET+driver combinations in portable LED lighting systems where space, power efficiency, and GPIO conservation are critical.

FAQ

What is the maximum continuous current per channel for the AAT4295IJS-T1?

The AAT4295IJS-T1 supports up to 271 mA per channel at 25°C ambient when all three switches are active, calculated from its 440 mW maximum package power dissipation and typical R_DS(ON) of 1.9 Ω at 5 V. At 85°C ambient, this drops to ~133 mA per channel due to thermal derating. The AAT4295IJS-T1 datasheet specifies absolute maximum drain current per switch as limited by package thermal capability, not intrinsic MOSFET rating.

Does the AAT4295IJS-T1 require external pull-up resistors on the EN/SET line?

No, the AAT4295IJS-T1 does not require external pull-up resistors on the EN/SET line. Its internal circuitry accepts direct GPIO connection, and the datasheet explicitly states that EN/SET "should not be left floating" - implying internal biasing exists. The S2Cwire interface relies on controlled rising-edge pulses, not steady-state logic levels, so external pull-ups would interfere with pulse timing integrity. The AAT4295IJS-T1 functions correctly with a standard CMOS GPIO driving EN/SET directly.

Can the AAT4295IJS-T1 drive common-cathode RGB LEDs?

No, the AAT4295IJS-T1 is designed exclusively for common-anode RGB LED configurations. As a low-side switch, it connects LED cathodes to ground - requiring the anodes to be tied to a positive supply. Driving common-cathode LEDs would require high-side switching, which the AAT4295IJS-T1 does not support. Attempting to use it with common-cathode LEDs results in no current flow. The AAT4295IJS-T1 application circuits and functional description in the Skyworks datasheet confirm its intended use with common-anode topologies.

What is the minimum pulse width required for reliable S2Cwire communication with the AAT4295IJS-T1?

The AAT4295IJS-T1 requires a minimum EN/SET high time (T_{EN/SET_HI_MIN}) of 50 ns and a maximum high time (T_{EN/SET_HI_MAX}) of 75 μs per pulse for valid S2Cwire decoding. Pulses shorter than 50 ns may not register as rising edges; pulses longer than 75 μs trigger the 500 μs latch timeout, causing premature state locking. The AAT4295IJS-T1 datasheet specifies these timing constraints in the Electrical Characteristics table and confirms reliable operation up to 1 MHz clock rates when adhering to these bounds.

Is the AAT4295IJS-T1 pin-compatible with the AAT4297?

No, the AAT4295IJS-T1 is not pin-compatible with the AAT4297. The AAT4295IJS-T1 uses an 8-pin SC70JW package with pins assigned to V_CC, two N/C, EN/SET, GND, and three switch drains (S1–S3). The AAT4297 uses a 12-pin TSOPJW package with six switch drains (S1–S6), additional N/C pins, and different pin spacing. Their pin configurations, counts, and footprints are mutually incompatible - PCB layout redesign is required to substitute one for the other. The AAT4295IJS-T1 datasheet explicitly lists separate pinouts and packages for each device.