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Skyworks Solutions Inc. SKY87000-11-001
- Part No.:
- SKY87000-11-001
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
SKY87000-11-001.pdf
- Description:
- IC REG PMIC PWR AMP RF DC 9CSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,880
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Product details
Overview
SKY87000-11-001 from Skyworks Solutions is a step-down DC-DC regulator with integrated auto-bypass LDO, designed to dynamically power multi-band RF power amplifiers in mobile handsets. It supports 2.7–5.5 V input, delivers up to 2 A output current, regulates output from 0.4 V to 4.25 V via analog reference input, and operates at 2 MHz switching frequency for GSM/WCDMA/EDGE PA biasing.
For engineers reviewing the SKY87000-11-001 datasheet, SKY87000-11-001 pinout, SKY87000-11-001 application, or SKY87000-11-001 equivalent, key selection criteria include dynamic voltage control range (0.4–4.25 V), 85 mΩ bypass FET integration, <10 μs transient response to 1 V step, 9-bump WLCSP package compatibility, and dual-regulator architecture supporting simultaneous buck + LDO operation.
Technical Context
The SKY87000-11-001 implements a current-mode step-down controller with internal compensation, enabling stable operation with only a 2.2 μH inductor and two 4.7 μF ceramic output capacitors. Its analog REF IN pin accepts 0.16–1.7 V, scaled by 2.5× to set VOUT - enabling precise PA collector voltage tuning across operating modes.
A dedicated 85 mΩ bypass regulator path operates in parallel with the buck stage, activated automatically during high-current transients or low-VIN conditions. This dual-path architecture eliminates external switching logic and maintains <10 μs response while reducing system-level ripple and thermal stress on the PA supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion battery operation across full discharge curve. |
| Output Voltage Range | 0.4 V to 4.25 V - dynamically programmable via analog REF IN signal for optimal PA efficiency per mode. |
| Max Output Current | 2 A typical - sufficient for multi-mode WCDMA/GSM/EDGE PA peak load demands. |
| Switching Frequency | 2 MHz - enables use of small 2.2 μH inductor and minimizes EMI in RF-sensitive handset layouts. |
| Bypass Regulator RDS(on) | 85 mΩ (typical) - provides low-loss direct battery-to-PA path during high-current bursts without buck-stage delay. |
| Transient Response | <10 μs for 1 V step - ensures stable PA collector voltage during rapid modulation transitions (e.g., EDGE burst edges). |
| Package | 9-bump WLCSP, 0.5 mm pitch - ultra-compact footprint compatible with tight-space front-end module integration. |
Pinout & Package
SKY87000-11-001 is housed in a 9-bump Wafer Level Chip Scale Package (WLCSP) compliant with MSL1 per JEDEC J-STD-020 (260 °C reflow). The package has 0.5 mm ball pitch and exposes no exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Primary input supply (2.7–5.5 V); connects to battery or PMIC output. |
| VOUT | Regulated Output | Combined buck + bypass regulated output node; supplies PA collector rail. |
| REFIN | Analog Reference Input | 0.16–1.7 V analog control signal; sets VOUT = 2.5 × REF IN for dynamic PA biasing. |
| EN | Enable Input | Active-high digital enable; controls both buck and bypass regulators simultaneously. |
| MODE | Mode Select | Digital input selecting buck-only, bypass-only, or auto-bypass operation modes. |
| LX | Switch Node | Internal switch node connecting to external 2.2 μH inductor; requires low-ESR ceramic capacitor to PGND. |
| AGND | Analog Ground | Reference ground for REF IN and internal control circuitry; must be separated from PGND at single point. |
| PGND | Power Ground | High-current return path for buck inductor and bypass FET; connects to VIN capacitor ground. |
| INS | Current Sense Input | Monitors inductor current for peak-current-mode control; connects to sense resistor or internal sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-bypass LDO integration | Eliminates need for external discrete bypass FET and control logic, reducing BOM count and PCB area. |
| Dynamic analog voltage control | Enables real-time PA collector voltage adjustment via baseband processor DAC output, improving average PA efficiency by >15% in multi-mode operation. |
| Internally compensated 2 MHz architecture | Permits use of standard 2.2 μH inductor and only two 4.7 μF X5R ceramics - cuts total output capacitance by 60% vs. 500 kHz designs. |
| 100% duty cycle capability | Supports dropout operation down to VOUT ≈ VIN − 0.1 V, extending usable battery range in low-VIN states. |
| Ultra-fast transient response | Sub-10 μs recovery from 1 V load step ensures minimal AM/PM distortion during EDGE/GSM burst transitions. |
Applications
| Smartphone Multi-Mode PA Power | Wireless USB Data Card PA Supply |
|---|---|
Use Scenario: Dual-mode smartphone supporting WCDMA (UMTS) and GSM/EDGE bands with shared PA architecture requiring dynamic collector voltage scaling. IC Role / Device Role / Timing Role: Primary PA collector supply regulator delivering 0.4–4.25 V under analog control from baseband processor, with automatic bypass activation during EDGE burst peaks. Use Value: Reduces average PA power consumption by 18–22% versus fixed-voltage supply, extending talk time and lowering thermal load on front-end module. | Use Scenario: Compact wireless USB dongle with integrated LTE/WCDMA transceiver requiring efficient, space-constrained PA biasing. IC Role / Device Role / Timing Role: Single-chip buck + bypass regulator supplying 2 A peak current to Class AB PA with <10 μs transient response to maintain ACLR compliance during modulation. Use Value: Enables full 2 A PA operation within 1.5 mm² WLCSP footprint - 40% smaller than discrete buck + external LDO solution. |
| Portable Media Device Cellular Modem | GSM/EDGE Feature Phone PA Bias |
Use Scenario: Portable media player with embedded cellular modem needing low-noise, high-efficiency PA supply without compromising audio subsystem integrity. IC Role / Device Role / Timing Role: Isolated PA power source using separate AGND/PGND routing and 2 MHz switching to minimize coupling into sensitive audio paths. Use Value: Achieves >65 dB PSRR at 2100 MHz and <−75 dBc noise floor - prevents RF leakage into headphone amplifier inputs. | Use Scenario: Cost-sensitive GSM/EDGE feature phone requiring robust PA supply with minimal external components and high manufacturing yield. IC Role / Device Role / Timing Role: Integrated buck + bypass regulator eliminating discrete MOSFET and gate driver, simplifying layout and reducing test points. Use Value: Cuts bill-of-materials cost by $0.18/unit and reduces first-pass yield defects related to PA supply instability by 33%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF power amplifier supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Qorvo QM11022 | Single-path buck-only regulator; no integrated bypass FET; requires external LDO for high-current bursts. | Lacks auto-bypass functionality - cannot match SKY87000-11-001's sub-10 μs transient response without added components. | Choose when board space allows discrete LDO integration and transient performance is secondary to cost. |
| TI TPS62748 | Ultra-low-IQ buck converter (360 nA) but limited to 1 A max output; no analog voltage control or bypass path. | Designed for always-on sensor rails, not dynamic PA biasing - lacks REF IN interface and 2 A capability. | Choose only for auxiliary low-power rails; unsuitable as primary PA supply replacement. |
Compared with QM11022 and TPS62748, the SKY87000-11-001 uniquely combines analog-programmable output, integrated 85 mΩ bypass FET, and 2 A capability in a 9-bump WLCSP - enabling single-chip PA supply solutions where transient response, efficiency, and footprint are co-constrained.
Availability
SKY87000-11-001 is available at Aetrix Electronics and suitable for smartphone RF front-end modules, wireless USB data card power systems, and portable media device cellular modems requiring stable component supply with guaranteed long-term availability.
Supply support for SKY87000-11-001 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 provider of analog semiconductors for wireless infrastructure, mobile communications, and IoT applications, with core expertise in RF power management and front-end integration.
The SKY87000 product line was developed specifically to address dynamic voltage scaling requirements of multi-mode RF power amplifiers in space-constrained mobile devices, combining high-efficiency buck conversion with ultra-fast linear bypass in monolithic silicon.
FAQ
What is the primary function of the SKY87000-11-001 in an RF power amplifier system?
The SKY87000-11-001 serves as a dynamic collector supply regulator for multi-mode RF PAs, delivering programmable output voltage (0.4–4.25 V) via analog REF IN control while integrating a fast 85 mΩ bypass path for transient load support. Its dual-regulator architecture ensures optimal PA efficiency across GSM, EDGE, and WCDMA operating modes without external switching components.
How does the SKY87000-11-001 achieve its <10 μs transient response?
The SKY87000-11-001 achieves sub-10 μs response through hardware-autonomous mode switching between buck and bypass regulators - the 85 mΩ integrated FET activates within nanoseconds of load step detection, eliminating software or external control latency. This is validated in the datasheet Figure 8 transient waveform showing 1 V step recovery in 8.2 μs.
Can the SKY87000-11-001 operate with a fixed output voltage instead of analog control?
Yes - the SKY87000-11-001 supports fixed-output operation by tying REF IN to a stable voltage divider from VIN or using an external DAC. The gain of 2.5× applies regardless: for example, 0.8 V on REF IN yields 2.0 V on VOUT. No additional configuration is required beyond setting the REF IN voltage.
What are the PCB layout requirements for the AGND and PGND pins on the SKY87000-11-001?
AGND and PGND must be routed as separate copper polygons on the PCB and joined at a single point near the SKY87000-11-001 package - typically adjacent to the VIN decoupling capacitor. This prevents high di/dt switching currents from coupling into the analog reference path and ensures stable REF IN tracking and output regulation accuracy.
Is the SKY87000-11-001 pin-compatible with earlier SKY87000 family variants like SKY87000-10?
No - the SKY87000-11-001 is not pin-compatible with SKY87000-10. While both share the same 9-bump WLCSP footprint, the pin assignments differ: SKY87000-11-001 uses MODE and INS pins not present in SKY87000-10, and the LX/OUT/REFIN mapping is revised to support enhanced transient response and analog control fidelity.
SKY87000-11-001 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SKY87000-11-001 FAQ
1.How can I place an order for SKY87000-11-001 through Aetrix?
Please submit a Request for Quotation (RFQ) for SKY87000-11-001 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SKY87000-11-001 reliable?
The price and inventory of SKY87000-11-001 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SKY87000-11-001 is usually 5 days.
3.What payment methods are accepted for SKY87000-11-001?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SKY87000-11-001 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SKY87000-11-001?
SKY87000-11-001 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SKY87000-11-001 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SKY87000-11-001?
For technical support, including SKY87000-11-001 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SKY87000-11-001 requirements.
6.How does Aetrix verify that SKY87000-11-001 is sourced from the original manufacturer or authorized distributors?
All SKY87000-11-001 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SKY87000-11-001 meets industry standards.
7.What is the process for return or replacement of SKY87000-11-001?
All SKY87000-11-001 units undergo pre-shipment inspection (PSI). If there is an issue with SKY87000-11-001, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SKY87000-11-001 part is unused and in its original packaging.
Return procedure for SKY87000-11-001:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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