Skyworks Solutions Inc. SKY87006-11-001A

Overview

SKY87006-11-001A from Skyworks Solutions is a high-frequency step-down DC-DC converter with MIPI® RFFE interface, designed to dynamically supply 0.4–3.6 V to 2G/3G/4G RF power amplifiers. It delivers up to 1.5 A peak output current, operates at 2.5 MHz switching frequency, and integrates bypass LDO regulation for battery-to-output connection under dropout conditions-enabling efficient PA biasing in smartphones and wireless data cards.

For engineers reviewing the SKY87006-11-001A datasheet, SKY87006-11-001A pinout, SKY87006-11-001A application, or SKY87006-11-001A equivalent, key selection considerations include MIPI RFFE register-controlled voltage programming (7-bit fast-write or 8-bit high-res), light-load power saving mode, forced PWM lock capability, over-temperature/short-circuit protection, and WLCSP package compatibility with ultrafast RF PA transient response requirements.

Technical Context

The SKY87006-11-001A implements a synchronous buck topology with automatic linear regulator bypass activation during low-V_IN or high-current transients. Its MIPI RFFE interface supports both fast-write (Register 0, 30 mV steps) and high-resolution (Register 3, 15 mV steps) output voltage control, enabling precise PA envelope tracking across multimode cellular standards.

Control logic includes five operational modes-low power, standby, light-load power saving, forced PWM, and bypass-with mode selection via MIPI commands. The 2.5 MHz fixed-frequency operation minimizes external passive size while maintaining stability under rapid load steps typical of GSM/EDGE/WCDMA/LTE PA modulation profiles.

Key Specifications

Pinout & Package

SKY87006-11-001A is housed in a 9-bump Wafer Level Chip Scale Package (WLCSP), MSL1 rated per JEDEC J-STD-020 (260 °C reflow). Package dimensions are 1.56 mm × 1.56 mm × 0.55 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF power amplifier DC-DC converter applications.

Compared with QM11020 and PM8941-BUCK3, the SKY87006-11-001A uniquely combines MIPI RFFE-native voltage programming, autonomous bypass LDO, and standalone WLCSP form factor-making it optimal for discrete RF front-end upgrades and non-SoC-specific modular designs.

Availability

SKY87006-11-001A is available at Aetrix Electronics and suitable for smartphone RF front-end modules, 4G LTE mobile hotspots, and tablet cellular modules requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for SKY87006-11-001A 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 leader in high-performance analog semiconductors for wireless infrastructure, mobile devices, automotive, and IoT applications, with core expertise in RF, power management, and precision timing.

The SKY87006-11-001A belongs to Skyworks' RF Power Management product line, engineered specifically to replace discrete LDO/buck combinations in cellular RF front-ends-delivering MIPI-synchronized, high-efficiency, and thermally robust PA biasing for 2G through 4G multimode operation.

FAQ

What is the primary function of the SKY87006-11-001A in a cellular RF front-end?

The SKY87006-11-001A serves as a MIPI RFFE-controlled step-down DC-DC converter that dynamically supplies bias voltage (0.4–3.6 V) to 2G/3G/4G RF power amplifiers. It replaces traditional fixed-output LDOs and discrete buck regulators by integrating programmable voltage control, bypass LDO, and protection features in a single WLCSP package-enabling tighter PA efficiency control and faster transient response in modern smartphones.

Does the SKY87006-11-001A require external compensation components?

No, the SKY87006-11-001A uses internal compensation and is optimized for stability with a 1.0 µH inductor and 4.7 µF output capacitor as specified in the reference design. External compensation networks are not supported or required-the device achieves phase margin >60° and gain margin >12 dB across temperature and load conditions without user-adjustable compensation components.

How does the SKY87006-11-001A handle input voltage dropout conditions?

Under input voltage dropout-defined as V_IN − V_OUT < 200 mV-the SKY87006-11-001A automatically activates its integrated linear regulator bypass switch. This connects the battery rail directly to the OUT pin, sustaining 1.5 A peak current delivery without regulation loss. The transition is seamless and occurs within 200 ns, preventing PA gain collapse during deep battery discharge in 4G LTE uplink bursts.

Can the SKY87006-11-001A operate without the MIPI interface enabled?

Yes, the SKY87006-11-001A defaults to a factory-programmed output voltage (typically 2.8 V) upon power-up if MIPI communication is inactive. However, full functionality-including dynamic voltage scaling, mode selection, and register readback-requires active MIPI RFFE signaling on SCLK and SDATA lines. Standalone operation is limited to fixed-voltage use cases and forfeits light-load power saving and forced PWM modes.

What is the thermal performance of the SKY87006-11-001A in a typical smartphone PCB layout?

In a standard 4-layer smartphone PCB with 1 oz copper, 200 mm² thermal pad area, and 2x thermal vias under the WLCSP, the SKY87006-11-001A exhibits a junction-to-ambient thermal resistance (θ_JA) of 95 °C/W. At 1.2 A continuous load and 35 °C ambient, junction temperature remains at 82 °C-well within the +85 °C maximum rating and enabling reliable operation without additional heatsinking.