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onsemi FAN48610BUC33X
- Part No.:
- FAN48610BUC33X
- Manufacturer:
- onsemi
- Package:
- 9-UFBGA, WLCSP
- Datasheet:
-
FAN48610BUC33X.pdf
- Description:
- IC REG BOOST 3.3V 1A 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,594
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Product details
Overview
FAN48610BUC33X from onsemi is a 2.5 MHz synchronous boost DC-DC converter in WLCSP-9 package, delivering 1.0 A output current at 3.3 V output with input voltage as low as 2.5 V, featuring integrated N- and P-channel MOSFETs, 94% peak efficiency, and ultra-compact 1.215 mm × 1.215 mm footprint for portable USB OTG power rails.
For engineers reviewing the FAN48610BUC33X datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed operating ranges (VIN = 2.5–4.8 V, VOUT = 3.3 V fixed), real-world load capability (≥1.0 A @ 3.3 V), and direct alternatives for battery-powered embedded systems requiring high-density boost conversion.
Technical Context
The FAN48610BUC33X implements a constant-frequency, current-mode control architecture with automatic mode switching between linear (LIN), soft-start (SS), boost (BST), and pass-through (PT) based on VIN–VOUT differential and load conditions. It uses internal N- and P-channel synchronous rectifiers to eliminate external diode losses.
Its 2.5 MHz switching frequency enables use of sub-1 µH inductors (e.g., 0.47 µH) and small ceramic capacitors (10 µF CIN, 22 µF COUT), while integrated thermal shutdown (150 °C trip, 20 °C hysteresis) and overcurrent protection (3.0–3.85 A current limit) ensure robust operation in space-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V - eliminates external feedback resistors and ensures stable USB OTG VBUS compliance. |
| Input Voltage Range | 2.5 V to 4.8 V - supports single-cell Li-ion (2.7–4.2 V), Li-polymer, and NiMH battery inputs without pre-regulation. |
| Max Output Current | ≥1.0 A @ VOUT = 3.3 V, VIN ≥ 2.5 V - sufficient to power USB 2.0 host peripherals directly from battery. |
| Switching Frequency | 2.0–3.0 MHz (typ. 2.5 MHz) - enables ultra-small passive components and reduces EMI fundamental frequency above sensitive bands. |
| Peak Efficiency | 94% @ VIN = 3.6 V, IOUT = 500 mA - minimizes thermal rise in sealed handheld enclosures. |
| UVLO Threshold | 2.2–2.3 V with 150 mV hysteresis - prevents erratic startup during battery brownout and ensures clean enable sequencing. |
| Package | WLCSP-9, 1.215 mm × 1.215 mm × 0.38 mm, 0.4 mm pitch - compatible with fine-pitch PCB assembly and <11 mm² total solution area. |
Pinout & Package
Package: WLCSP-9 (Case 567QW), 1.215 mm × 1.215 mm, 0.4 mm pitch, bottom-side solder balls. Thermal pad not present; thermal path relies on ball-to-PCB conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2 | VOUT | Regulated 3.3 V output - connects directly to USB VBUS rail or system 3.3 V domain; requires 22 µF ceramic output capacitor. |
| B1, B2 | SW | Switch node - connects to 0.47 µH inductor; high dv/dt node requiring tight layout and minimal trace length. |
| C1, C2 | PGND | Power ground - return path for inductor current and output capacitor; must be connected to solid ground plane under IC. |
| A3 | VIN | Input supply - accepts 2.5–4.8 V battery input; requires 10 µF ceramic decoupling capacitor placed within 2 mm. |
| B3 | EN | Enable input - active-high logic control (VIH ≥ 1.05 V); 100 nA shutdown current enables battery-conscious always-on monitoring. |
| C3 | AGND | Analog ground - reference for internal error amplifier and UVLO comparator; must be tied to PGND at single point near IC. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Synchronous Rectification | N- and P-channel MOSFETs replace external Schottky diode, eliminating 300–400 mV forward drop and enabling >94% efficiency at light loads. |
| Auto Mode Switching (LIN/SS/BST/PT) | Seamlessly transitions between linear regulation, soft-start, boost, and pass-through based on VIN–VOUT differential-no external mode control required. |
| Ultra-Small Solution Size | Total footprint <11 mm² using 0.47 µH inductor (2016 case) and 0603 capacitors-fits within tight USB-C accessory PCB constraints. |
| Robust Protection Suite | Includes thermal shutdown (150 °C), hiccup-mode overcurrent (3.0–3.85 A), input UVLO (2.2–2.3 V), and EN-controlled shutdown (100 nA IQ). |
| USB OTG Ready | Fixed 3.3 V output meets USB On-The-Go host VBUS specification; supports 1.0 A sustained load per USB 2.0 requirements. |
Applications
| Portable Medical Sensors | Wireless Headset Charging |
|---|---|
|
Use Scenario: Compact wearable blood oxygen sensor powered by coin-cell or thin-film battery requiring regulated 3.3 V for BLE SoC and analog front-end. IC Role / Device Role / Timing Role: Primary boost regulator supplying stable 3.3 V from 2.5–3.0 V battery; operates in LIN mode at light load and BST mode during BLE transmission bursts. Use Value: 94% peak efficiency extends battery life beyond 7 days; 1.215 mm × 1.215 mm WLCSP enables integration into sub-10 cm² PCBs. |
Use Scenario: True wireless stereo (TWS) earbud charging case providing 3.3 V auxiliary power to charging management IC during case-to-earbud energy transfer. IC Role / Device Role / Timing Role: Secondary boost stage generating 3.3 V from partially discharged Li-ion (2.8–4.0 V) in charging case; enters PT mode when VIN > 3.3 V to minimize dropout loss. Use Value: Auto mode switching eliminates need for external mode-select logic; 2.5 MHz operation avoids interference with 2.4 GHz Bluetooth band. |
| USB OTG Power Bank | Industrial Handheld Scanner |
|
Use Scenario: Credit card-sized power bank supporting USB OTG host functionality for connecting peripherals like keyboards or flash drives to smartphones. IC Role / Device Role / Timing Role: Dedicated 3.3 V VBUS generator compliant with USB OTG specification; delivers ≥1.0 A continuously with <2% output regulation across temperature. Use Value: Fixed 3.3 V output removes feedback resistor network, reducing BOM count and layout sensitivity; WLCSP package allows double-sided component placement. |
Use Scenario: Ruggedized barcode scanner with integrated imager and wireless module, powered by removable 3.7 V Li-ion battery with wide discharge curve. IC Role / Device Role / Timing Role: System-level boost converter powering 3.3 V digital core and 3.3 V analog imaging chain; maintains regulation down to 2.5 V battery voltage via SS and BST modes. Use Value: 150 °C thermal shutdown prevents field failure in hot industrial environments; 2016-size inductor support simplifies sourcing and reliability validation. |
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 3.3 V output, 2.5 MHz, 1.2 A max, 1.22 mm × 1.22 mm DSBGA-9 - identical footprint and electrical specs but higher 1.2 A rating and lower 25 µA quiescent current. | Supports higher peak loads (e.g., camera flash LED burst) but lacks auto mode switching; requires external soft-start capacitor for controlled ramp. | Select when >1.0 A peak current or lower IQ is critical; verify layout compatibility with same 0.4 mm pitch and 1.22 mm dimensions. |
| MAX17222ELT+T | Adjustable 2.0–5.25 V output, 2.5 MHz, 1.0 A, 1.60 mm × 1.60 mm WLP-6 - larger package, no fixed 3.3 V option, and no PT/LIN mode support. | Suitable only where output voltage flexibility is needed; requires external feedback resistors and cannot replace FAN48610BUC33X without redesign. | Choose only if adjustable output is mandatory; avoid for drop-in 3.3 V USB OTG replacement due to pinout mismatch and missing pass-through mode. |
Compared with TPS61291DRVR and MAX17222ELT+T, the FAN48610BUC33X uniquely combines fixed 3.3 V output, auto mode switching (LIN/SS/BST/PT), and 1.215 mm × 1.215 mm WLCSP in a single device-enabling smaller PCB area, simpler BOM, and seamless battery-voltage tracking without external components.
Availability
FAN48610BUC33X is available at Aetrix Electronics and suitable for portable medical sensors, USB OTG power banks, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and RoHS-compliant WLCSP packaging.
Supply support for FAN48610BUC33X 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, serving automotive, industrial, cloud, and IoT markets with silicon and SiC solutions.
The FAN48610BUC33X belongs to onsemi's TINYBOOST™ family of ultra-compact, high-frequency boost converters designed specifically for space-constrained battery-powered devices requiring fast transient response and minimal external components.
FAQ
What is the maximum continuous output current of the FAN48610BUC33X at 3.3 V output?
The FAN48610BUC33X delivers ≥1.0 A continuous output current at 3.3 V when input voltage is ≥2.5 V, and ≥1.5 A when input voltage is ≥3.0 V. These values are measured under recommended operating conditions (TA = –40 °C to +85 °C, proper PCB layout, and specified 0.47 µH inductor and 22 µF COUT). Derating applies above +85 °C ambient.
Does the FAN48610BUC33X require external feedback resistors to set its output voltage?
No, the FAN48610BUC33X has a factory-trimmed fixed 3.3 V output and does not require external feedback resistors. This eliminates resistor tolerance errors, saves PCB area, and improves long-term stability-making it ideal for USB OTG and other applications where precise, maintenance-free 3.3 V regulation is required.
How does the FAN48610BUC33X handle input voltages higher than 3.3 V?
When VIN exceeds VOUT (3.3 V) by more than 300 mV, the FAN48610BUC33X automatically enters Pass-Through (PT) mode, routing input directly to output with minimal dropout (typically <100 mV). This mode reduces power loss and heat generation during high-battery states, extending runtime and improving thermal performance in single-cell Li-ion applications.
What is the purpose of the AGND pin on the FAN48610BUC33X, and how should it be connected?
The AGND pin on the FAN48610BUC33X serves as the analog reference ground for internal error amplifiers, UVLO comparators, and soft-start circuitry. It must be connected to the power ground (PGND) at a single point near the IC-never routed separately or through vias-to prevent noise coupling and ensure stable regulation and accurate enable threshold behavior.
Can the FAN48610BUC33X operate from a 2.5 V input and still regulate 3.3 V output reliably?
Yes, the FAN48610BUC33X is fully specified to deliver ≥1.0 A at 3.3 V output with input as low as 2.5 V. Its 2.5 MHz switching frequency, low RDS(ON) MOSFETs (80–130 mΩ N-channel, 65–115 mΩ P-channel), and optimized control loop ensure stable regulation and >88% efficiency even at minimum VIN, making it suitable for deeply discharged battery scenarios.
FAN48610BUC33X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- TinyBoost®
- Package/Case:
- 9-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- 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):
- 3.3V
- 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)
FAN48610BUC33X FAQ
1.How can I place an order for FAN48610BUC33X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN48610BUC33X 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 FAN48610BUC33X reliable?
The price and inventory of FAN48610BUC33X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN48610BUC33X is usually 5 days.
3.What payment methods are accepted for FAN48610BUC33X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN48610BUC33X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN48610BUC33X?
FAN48610BUC33X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN48610BUC33X 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 FAN48610BUC33X?
For technical support, including FAN48610BUC33X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN48610BUC33X requirements.
6.How does Aetrix verify that FAN48610BUC33X is sourced from the original manufacturer or authorized distributors?
All FAN48610BUC33X 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 FAN48610BUC33X meets industry standards.
7.What is the process for return or replacement of FAN48610BUC33X?
All FAN48610BUC33X units undergo pre-shipment inspection (PSI). If there is an issue with FAN48610BUC33X, 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 FAN48610BUC33X part is unused and in its original packaging.
Return procedure for FAN48610BUC33X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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