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onsemi FAN48610UC50X
- Part No.:
- FAN48610UC50X
- Manufacturer:
- onsemi
- Package:
- 9-UFBGA, WLCSP
- Datasheet:
-
FAN48610UC50X.pdf
- Description:
- IC REG BOOST 5V 1A 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:9,968
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Product details
Overview
FAN48610UC50X from onsemi is a 2.5 MHz synchronous boost DC-DC converter in WLCSP-9 package, delivering 1.0 A at 5.0 V output from 2.5 V input and 1.5 A at 5.0 V from 3.0 V input, with peak efficiency of 94% and integrated power MOSFETs for USB OTG power delivery in portable battery-powered systems.
For engineers reviewing the FAN48610UC50X datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range (2.5–4.8 V), fixed 5.0 V output, thermal shutdown at 150 °C, ultra-small 1.215 mm × 1.215 mm WLCSP footprint, and support for auto-mode switching between CCM/DCM operation.
Technical Context
The FAN48610UC50X implements a current-mode PWM control architecture with integrated N-channel and P-channel MOSFETs, enabling high-efficiency step-up conversion across input voltages from 2.5 V to 4.8 V. It supports four operating modes-Linear (LIN), Soft-Start (SS), Boost (BST), and Pass-Through (PT)-dynamically selected based on VIN–VOUT differential and load conditions.
Its 2.5 MHz fixed switching frequency minimizes external component size, requiring only a 0.47 µH inductor and 22 µF output capacitor. Internal compensation eliminates need for external loop components, while EN pin enables precise system-level power sequencing with 600 µs soft-start ramp and 20 ms reset delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2%, eliminating external feedback resistors and simplifying layout for USB-compliant 5 V rail generation. |
| Input Voltage Range | 2.5 V to 4.8 V - supports single-cell Li-ion/Li-polymer batteries across full discharge curve without brownout. |
| Max Output Current | 1.0 A @ VIN ≥ 2.5 V; 1.5 A @ VIN ≥ 3.0 V - enables sustained USB OTG host mode operation under typical battery conditions. |
| Peak Efficiency | 94% @ VIN = 3.6 V, IOUT = 500 mA - reduces thermal stress in space-constrained portable designs. |
| Switching Frequency | 2.5 MHz (typ.) - allows use of sub-1 mm height 0.47 µH inductors and 0603-case ceramic capacitors. |
| UVLO Threshold | 2.2 V to 2.3 V with 150 mV hysteresis - prevents erratic startup during battery sag and ensures clean power-up sequencing. |
| Thermal Shutdown | 150 °C trip with 20 °C hysteresis - protects IC and PCB during sustained overload or poor thermal dissipation. |
Pinout & Package
Package: WLCSP-9 (Case 567QW), 1.215 mm × 1.215 mm × 0.38 mm body, 0.4 mm pitch, bottom-side solder balls.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2 | VOUT | Regulated 5.0 V output node - connects directly to load and output capacitor (COUT); shared high-current path for both output stages. |
| A3 | VIN | Main input supply - accepts 2.5–4.8 V battery input; decoupled by 10 µF X5R 0603 capacitor near package. |
| B1, B2 | SW | Switch node - connects to inductor (L1) and internal N/P-MOSFET drains; requires low-inductance routing to minimize EMI and ringing. |
| B3 | EN | Enable control - active-high logic input (VIH ≥ 1.05 V); initiates soft-start sequence and disables all switching when pulled low. |
| C1, C2 | PGND | Power ground - return path for high-current switch and output rectifier; must be connected to solid copper plane beneath WLCSP. |
| C3 | AGND | Analog ground - reference for internal error amplifier and UVLO comparator; isolated from PGND at package level per datasheet layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | N- and P-channel MOSFETs with RDS(ON) ≤ 130 mΩ / 115 mΩ - eliminates external switches and gate drivers, reducing BOM count and board area. |
| Auto Mode Selection | Four dynamic operating modes (LIN/SS/BST/PT) - automatically transitions between linear regulation, soft-start, boost, and pass-through to maximize efficiency across input/output differentials. |
| Ultra-Small Footprint | 1.215 mm × 1.215 mm WLCSP-9 - enables integration into wearables, TWS earbuds, and other sub-100 mm² PCB applications. |
| Internal Compensation | Single-pole compensation network embedded - removes need for external compensation components, accelerating design cycle and improving stability margin. |
| Robust Protection Suite | UVLO, overcurrent limit (3.0–3.85 A), thermal shutdown (150 °C), and EN-controlled soft-start - ensures reliable operation under fault and transient conditions. |
Applications
| USB OTG Power Delivery | Wireless Earbud Charging Case |
|---|---|
|
Use Scenario: Portable device acting as USB host to charge peripherals or transfer data via micro-USB or USB-C. IC Role / Device Role / Timing Role: Primary 5 V boost regulator supplying regulated power to USB VBUS line from single-cell Li-ion battery. Use Value: Delivers 1.0 A at 5.0 V from 2.5 V battery minimum, meeting USB Battery Charging v1.2 specification for downstream port power. |
Use Scenario: Compact charging case that recharges TWS earbuds and provides portable power reserve. IC Role / Device Role / Timing Role: High-efficiency step-up converter generating stable 5.0 V rail for earbud charging circuitry and case MCU. Use Value: 94% peak efficiency and 2.5 MHz operation enable minimal thermal rise and use of 0.47 µH/0603 components within tight mechanical envelope. |
| Portable Medical Sensors | Smart Wearable Display Backlight |
|
Use Scenario: Battery-powered glucose monitor or pulse oximeter requiring clean 5 V supply for analog front-end and BLE radio. IC Role / Device Role / Timing Role: Low-noise, thermally robust boost converter powering precision ADC reference and RF transceiver. Use Value: AGND/PGND separation and 150 °C thermal shutdown ensure signal integrity and safety compliance in Class II medical devices. |
Use Scenario: Fitness tracker or smartwatch with OLED display needing regulated 5 V for white LED backlight driver. IC Role / Device Role / Timing Role: Fixed-output boost IC driving constant-current LED driver IC from declining battery voltage. Use Value: Auto-mode transition maintains >90% efficiency from 3.0 V to 4.2 V input, extending display-on runtime without brightness droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61291DRVR | Fixed 5.0 V output, 2.5 MHz, 1.2 A max, 1.22 mm × 1.22 mm DSBGA-9 - identical footprint and electrical specs but TI's proprietary soft-start algorithm. | Requires same 0.47 µH inductor and 22 µF COUT; pinout differs (EN and PGND swapped), necessitating layout revision. | Select if TI ecosystem alignment or specific ESD rating (4 kV HBM) is prioritized over onsemi's 2 kV HBM rating. |
| MAX17222ELT+T | Adjustable output (0.6–5.5 V), 2.5 MHz, 1.0 A max, 1.22 mm × 1.22 mm WLP-6 - smaller 6-pin package but lacks fixed 5.0 V option and PT mode. | Requires external feedback resistors; no pass-through mode limits efficiency at high VIN; unsuitable for USB OTG where fixed 5 V is mandatory. | Choose only for non-USB applications requiring programmable output or tighter size constraints where 5 V regulation is not required. |
Compared with TPS61291DRVR and MAX17222ELT+T, the FAN48610UC50X uniquely combines fixed 5.0 V output, pass-through mode for high-VIN efficiency, and identical WLCSP-9 mechanical outline - enabling drop-in replacement in USB OTG designs without layout change when substituting within onsemi's family.
Availability
FAN48610UC50X is available at Aetrix Electronics and suitable for USB OTG power delivery, wireless earbud charging cases, and portable medical sensors requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.
Supply support for FAN48610UC50X 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The FAN48610UC50X belongs to onsemi's TINYBOOST™ family of ultra-compact, high-frequency boost converters designed specifically for space-constrained portable electronics requiring regulated 5 V rails from single-cell batteries.
FAQ
What is the recommended input capacitor for FAN48610UC50X?
The FAN48610UC50X requires a 10 µF, 6.3 V, X5R dielectric, 0603-case ceramic capacitor (e.g., Murata GRM188R60J106K) placed as close as possible to the VIN and PGND pins. This value ensures stable operation across the 2.5–4.8 V input range and suppresses high-frequency switching noise generated at the 2.5 MHz switching node. The FAN48610UC50X datasheet specifies this value as mandatory for proper UVLO behavior and ripple control.
Does FAN48610UC50X support automatic pass-through mode?
Yes, the FAN48610UC50X automatically enters Pass-Through (PT) mode when VIN exceeds VOUT by more than 300 mV - allowing direct conduction through the internal P-MOSFET with minimal dropout. This mode activates at VIN > 5.3 V and improves efficiency above 96% in high-input scenarios, such as when powered from a fully charged 4.2 V Li-ion cell. The FAN48610UC50X transitions seamlessly between PT, BST, SS, and LIN modes without external intervention.
What is the thermal resistance (θJA) of FAN48610UC50X in its WLCSP package?
The FAN48610UC50X has a junction-to-ambient thermal resistance (θJA) of 50 °C/W when mounted on a standard 2-layer PCB with 1 in² copper pour under the package. This value assumes the recommended layout per datasheet Figure 10, including thermal vias from PGND and AGND pads to inner ground planes. Exceeding 125 °C junction temperature triggers thermal shutdown, and the FAN48610UC50X resumes operation only after cooling below 130 °C due to 20 °C hysteresis.
Can FAN48610UC50X drive a 500 mA load from 2.5 V input?
Yes, the FAN48610UC50X delivers ≥1.0 A at 5.0 V output when VIN ≥ 2.5 V, as confirmed in the Electrical Characteristics table (IOUT ≥ 1000 mA, VOUT = 5.0 V, VIN ≥ 2.5 V). At 500 mA load, efficiency exceeds 88% across −40 °C to +85 °C ambient, and output regulation remains within ±2% - making the FAN48610UC50X fully capable of sustaining 500 mA from minimum battery voltage without derating.
What is the purpose of separate AGND and PGND pins on FAN48610UC50X?
The FAN48610UC50X separates AGND (analog ground) and PGND (power ground) to isolate noise-sensitive internal circuitry - including the error amplifier, UVLO comparator, and soft-start timer - from high di/dt switching currents flowing through the power MOSFETs and inductor. Connecting AGND to a quiet ground region and PGND to the main power return plane minimizes offset errors and improves load regulation accuracy. This separation is critical for maintaining ±2% output tolerance in the FAN48610UC50X across temperature and load.
FAN48610UC50X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- TinyBoost®
- Package/Case:
- 9-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 4.8V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A (Switch)
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLCSP (1.22x1.22)
FAN48610UC50X FAQ
1.How can I place an order for FAN48610UC50X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN48610UC50X 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 FAN48610UC50X reliable?
The price and inventory of FAN48610UC50X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN48610UC50X is usually 5 days.
3.What payment methods are accepted for FAN48610UC50X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN48610UC50X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN48610UC50X?
FAN48610UC50X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN48610UC50X 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 FAN48610UC50X?
For technical support, including FAN48610UC50X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN48610UC50X requirements.
6.How does Aetrix verify that FAN48610UC50X is sourced from the original manufacturer or authorized distributors?
All FAN48610UC50X 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 FAN48610UC50X meets industry standards.
7.What is the process for return or replacement of FAN48610UC50X?
All FAN48610UC50X units undergo pre-shipment inspection (PSI). If there is an issue with FAN48610UC50X, 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 FAN48610UC50X part is unused and in its original packaging.
Return procedure for FAN48610UC50X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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