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onsemi FAN25800AUCF27X
- Part No.:
- FAN25800AUCF27X
- Manufacturer:
- onsemi
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
FAN25800AUCF27X.pdf
- Description:
- IC REG LINEAR 2.7V 500MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,390
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Product details
Overview
FAN25800AUCF27X from ON Semiconductor is a 2.7 V, 500 mA low-noise, low-quiescent-current linear LDO regulator optimized for noise-sensitive portable applications. It operates from 2.3 V to 5.5 V input, delivers <70 mV dropout at 250 mA, achieves 19 nV/√Hz output noise density (10 kHz), and draws only 17 µA quiescent current in regulation - enabling extended battery life in WiFi modules and smartphones.
For engineers reviewing the FAN25800AUCF27X datasheet, pinout, applications, or equivalent options, key selection criteria include its 0.65 mm × 0.65 mm WLCSP package, 85 dB PSRR at 100 Hz, thermal shutdown protection, controlled soft-start, and stability with dual 1.5 µF 0201 ceramic capacitors.
Technical Context
The FAN25800AUCF27X implements a PMOS pass transistor architecture with internal voltage reference and error amplifier, enabling ultra-low dropout and high PSRR across low-to-mid frequencies. Its enable-controlled shutdown reduces supply current below 1 µA, and UVLO prevents operation below 2.1 V input.
Soft-start limits inrush current during turn-on by controlling output ramp rate, while short-circuit and thermal shutdown protections operate independently - the latter triggering at 150°C with 20°C hysteresis. The device is specified for –40°C to +85°C ambient operation and requires no external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 2.7 V output - eliminates external feedback network, simplifies layout for dedicated rail generation. |
| IOUT_MAX | 500 mA continuous output - supports moderate-power RF and baseband ICs in portable devices. |
| Dropout Voltage | <70 mV at 250 mA - enables regulation from 2.77 V input, critical for Li-ion battery discharge tail-end operation. |
| IQ | 17 µA typical in regulation - extends battery runtime in always-on subsystems like Bluetooth LE or sensor hubs. |
| Output Noise | 19 nV/√Hz at 10 kHz (8 µVRMS, 10 Hz–100 kHz) - meets stringent noise requirements of RF transceivers and ADCs. |
| PSRR | 85 dB at 100 Hz - suppresses switching noise from upstream DC-DC converters in post-regulation configurations. |
| Package | 4-ball WLCSP, 0.65 mm × 0.65 mm, 0.35 mm pitch - enables ultra-compact PCB footprints in space-constrained mobile designs. |
Pinout & Package
Package: 4-ball Wafer-Level Chip-Scale Package (WLCSP), 0.65 mm × 0.65 mm body, 0.35 mm ball pitch, plated solder, max thickness 330 µm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | VIN | Input power connection - must be decoupled with ≥0.4 µF effective capacitance close to the ball; accepts 2.3–5.5 V. |
| A2 | VOUT | Regulated 2.7 V output - drives load and requires dual 1.5 µF 0201 ceramic capacitors for stability. |
| B1 | EN | Active-high enable - logic-compatible (VIH ≥ 1.05 V); floating prohibited; internal pull-down absent. |
| B2 | GND | Power and signal reference ground - connects to PCB ground plane; critical for thermal and noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 8 µVRMS integrated noise (10 Hz–100 kHz) - preserves signal integrity in RF front-ends and precision analog circuits. |
| Ultra-low IQ | 17 µA operating current - minimizes standby power loss in battery-powered IoT endpoints. |
| Stable with 0201 ceramics | Validated with two 1.5 µF, 0201-case X5R MLCCs - reduces board area and BOM count vs. larger case sizes. |
| Controlled soft-start | 250–500 µs startup time - prevents input voltage sag and system reset during power-up sequencing. |
| Integrated protection | UVLO (2.1 V threshold), thermal shutdown (150°C), and short-circuit current limiting - eliminates need for external fault management circuitry. |
Applications
| WiFi Modules | Smartphones |
|---|---|
Use Scenario: Powering 2.4 GHz/5 GHz RF transceivers and baseband processors in compact wireless modules. IC Role / Device Role / Timing Role: Post-regulator cleaning switching noise from buck converters supplying RF sections. Use Value: 85 dB PSRR at 100 Hz and 19 nV/√Hz noise ensure clean VDD for sensitive RF PLLs and ADCs. | Use Scenario: Supplying camera ISP, audio codec, or sensor hub rails where battery efficiency and noise immunity are critical. IC Role / Device Role / Timing Role: Low-IQ LDO delivering stable 2.7 V to always-on subsystems during deep-sleep modes. Use Value: 17 µA quiescent current extends standby time without compromising wake-up responsiveness. |
| Tablets | Portable Medical Devices |
Use Scenario: Providing regulated 2.7 V to touch controller, display interface, or NFC transceiver in thin-form-factor tablets. IC Role / Device Role / Timing Role: Compact-area power solution leveraging 0.65 mm × 0.65 mm WLCSP footprint. Use Value: Dual 1.5 µF 0201 capacitor support enables minimal PCB real estate usage and simplified layout. | Use Scenario: Powering low-power biosignal acquisition circuits (e.g., ECG front-end, pulse oximeter ADC) requiring ultra-low noise. IC Role / Device Role / Timing Role: Precision analog supply rail generator with <8 µVRMS broadband noise. Use Value: Integrated 8 µVRMS noise (10 Hz–100 kHz) avoids additional filtering stages and maintains SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B272MR-G | 2.7 V fixed output, 500 mA, 25 µA IQ, 25 µVRMS noise, SOT-25 package (2.9 mm × 2.8 mm) | Larger footprint, higher noise, but offers wider VIN range (1.5–6.0 V) and better thermal dissipation | Select when board space allows larger package and higher input voltage flexibility is needed. |
| Richtek RT9080-27GJ5 | 2.7 V fixed output, 500 mA, 20 µA IQ, 20 µVRMS noise, DFN-6 (1.2 mm × 1.2 mm) | 6-pin DFN vs. 4-ball WLCSP; requires external EN pull-up; slightly higher noise than FAN25800AUCF27X | Choose when DFN handling is preferred over WLCSP reflow and marginally higher noise is acceptable. |
Compared with Torex XC6210B272MR-G and Richtek RT9080-27GJ5, the FAN25800AUCF27X delivers superior noise performance (8 µVRMS) and smallest footprint (0.42 mm²), making it optimal for ultra-portable, noise-critical designs where space and battery life are constrained.
Availability
FAN25800AUCF27X is available at Aetrix Electronics and suitable for WiFi modules, smartphones, and portable medical devices requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for FAN25800AUCF27X 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
ON Semiconductor is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and communications markets.
The FAN25800 series belongs to ON Semiconductor's high-performance analog power management portfolio, engineered specifically for ultra-low-noise, low-IQ regulation in space-constrained portable electronics.
FAQ
What is the output voltage tolerance of the FAN25800AUCF27X?
The FAN25800AUCF27X has a guaranteed output voltage accuracy of ±1.9% over temperature (–40°C to +85°C), load (5 mA to 500 mA), and input voltage (VOUT + 0.3 V to 4.2 V). This tight tolerance ensures reliable operation of downstream 2.7 V logic and analog circuits without requiring external trimming. The FAN25800AUCF27X maintains this specification under all recommended operating conditions.
Does the FAN25800AUCF27X require external compensation components?
No, the FAN25800AUCF27X is internally compensated and stable with standard ceramic output capacitors ranging from 0.4 µF to 15 µF. It is specifically validated for use with two 1.5 µF, 0201-case X5R MLCCs - eliminating the need for external resistors or capacitors in the feedback path. This simplifies design and reduces BOM cost for the FAN25800AUCF27X.
What is the minimum input voltage required for the FAN25800AUCF27X to regulate at full 500 mA?
The FAN25800AUCF27X requires VIN ≥ VOUT + 0.3 V (i.e., ≥ 3.0 V) to deliver 500 mA continuously. At lower input voltages, output current capability degrades per the dropout curve - for example, at VIN = 2.85 V, maximum sustainable output is ~250 mA. This relationship is defined in the Recommended Operating Conditions table for the FAN25800AUCF27X.
Can the FAN25800AUCF27X be used in parallel to increase output current?
No, the FAN25800AUCF27X is not designed for parallel operation. Its output voltage tolerance (±1.9%) and lack of current-sharing control make unbalanced loading likely, risking thermal overstress in one device. For higher current needs, select a single higher-current LDO or redesign the power architecture - do not parallel multiple FAN25800AUCF27X units.
Is the FAN25800AUCF27X RoHS-compliant and halogen-free?
Yes, the FAN25800AUCF27X is RoHS-compliant and halogen-free per ON Semiconductor's material declarations. It meets JEDEC J-STD-609 Category 1 for bromine and chlorine content (<900 ppm each) and adheres to EU Directive 2011/65/EU. Full compliance documentation is available through ON Semiconductor's website for the FAN25800AUCF27X.
FAN25800AUCF27X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-XFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.13V @ 250mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 25 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-WLCSP (0.65x0.65)
FAN25800AUCF27X FAQ
1.How can I place an order for FAN25800AUCF27X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN25800AUCF27X 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 FAN25800AUCF27X reliable?
The price and inventory of FAN25800AUCF27X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN25800AUCF27X is usually 5 days.
3.What payment methods are accepted for FAN25800AUCF27X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN25800AUCF27X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN25800AUCF27X?
FAN25800AUCF27X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN25800AUCF27X 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 FAN25800AUCF27X?
For technical support, including FAN25800AUCF27X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN25800AUCF27X requirements.
6.How does Aetrix verify that FAN25800AUCF27X is sourced from the original manufacturer or authorized distributors?
All FAN25800AUCF27X 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 FAN25800AUCF27X meets industry standards.
7.What is the process for return or replacement of FAN25800AUCF27X?
All FAN25800AUCF27X units undergo pre-shipment inspection (PSI). If there is an issue with FAN25800AUCF27X, 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 FAN25800AUCF27X part is unused and in its original packaging.
Return procedure for FAN25800AUCF27X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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