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onsemi FAN48630BUC33X
- Part No.:
- FAN48630BUC33X
- Manufacturer:
- onsemi
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
FAN48630BUC33X.pdf
- Description:
- IC REG BOOST PROG 1.5A 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,966
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Product details
Overview
FAN48630BUC33X from onsemi is a synchronous boost regulator with integrated power switches and true bypass mode, delivering fixed 3.30 V / 3.49 V output from 2.35–5.5 V input, supporting up to 1500 mA load at VIN ≥ 2.35 V, and operating at 2.5 MHz switching frequency for compact Li-ion battery-powered systems such as smartphones and USB OTG.
For engineers reviewing the FAN48630BUC33X datasheet, pinout, applications, or equivalent options, key selection considerations include its forced bypass mode (≤10 µA IQ), WLCSP-16 package (1.78×1.78 mm), valley-current limiting (2.9 A typ), ±2% output voltage accuracy, and thermal shutdown at 120 °C/150 °C thresholds.
Technical Context
The FAN48630BUC33X implements current-mode control in Continuous Conduction Mode (CCM) at ~2.5 MHz, transitioning to Discontinuous Conduction Mode (DCM) at light loads to maintain efficiency. Its modulator logic manages seamless transitions between Linear Startup (LIN), Soft-Start (SS), Boost Operating (BST), and Automatic Bypass (BPS) states based on VIN vs. VOUT_TARGET comparison and load conditions.
Bypass operation uses internal P-channel switches (RDS(ON)P_BYP = 65–85 mΩ) to establish low-impedance VIN-to-VOUT path when VIN exceeds target output; forced bypass is activated via BYP pin and disables most circuitry for ultra-low quiescent current (4–10 µA). VSEL pin enables dynamic output voltage adjustment to mitigate transient undershoot while optimizing system headroom.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.30 V / 3.49 V - precise dual-setpoint regulation for flexible system rail requirements |
| Input Voltage Range | 2.35 V to 5.5 V - supports single-cell Li-ion down to brownout, including USB 5 V sources |
| Max Load Current | 1500 mA at VIN ≥ 2.35 V - sufficient for RF power amplifiers and audio codecs in portable devices |
| Switching Frequency | 2.5 MHz typ - enables use of tiny 0.33 µH inductor and small ceramic capacitors |
| Quiescent Current | 4–10 µA in Forced Bypass Mode - extends battery runtime during system sleep states |
| Output Accuracy | ±2% - ensures stable supply to sensitive analog and RF circuits without external trimming |
| Thermal Protection | 120 °C trip / 100 °C release (T120A/T120R) and 150 °C hard shutdown - prevents damage under sustained overload |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP), 16-bump, 0.4 mm pitch, 1.78 × 1.78 × 0.586 mm, case 567SY, with backside lamination (per Note 2 in Table 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | EN | Enable control input - logic-high (>1.2 V) activates regulator; must be driven by 1.8 V logic, not VIN |
| A2 | PG | Open-drain Power Good - pulled low on fault, overload, or die temperature >120 °C |
| A3–A4 | VIN | Main input power - connects directly to Li-ion battery or DC source; dual pins reduce IR drop |
| B1 | VSEL | Output voltage select - raises VOUT_TARGET in fixed steps to improve transient response |
| B2, C2, D1 | AGND | Analog ground reference - provides signal return for internal comparators and control logic |
| B3–B4 | VOUT | Regulated output - requires low-ESR ceramic capacitor placed adjacent to PGND pins |
| C1 | BYP | Bypass mode control - logic-low forces true bypass with minimal IQ and disabled protections |
| C3–C4 | SW | Switching node - connects to inductor; high dv/dt demands tight layout and short trace routing |
| D2–D4 | PGND | Power ground - return path for inductor current and output capacitor; must be low-inductance plane |
Key Features
| Feature | Design Value |
|---|---|
| True Bypass Operation | Enables direct VIN-to-VOUT conduction when VIN > VOUT_TARGET, reducing losses and heat generation |
| Synchronous Rectification | Integrated N- and P-channel MOSFETs (RDS(ON)N = 85–120 mΩ, RDS(ON)P = 65–85 mΩ) eliminate external diode |
| Soft-Start with Load Disconnect | Prevents inrush current during startup and isolates load until regulation is achieved |
| Forced Bypass Mode | Reduces IQ to ≤10 µA by disabling bias circuits - critical for ultra-low-power standby applications |
| Short-Circuit Protection | Active in Boost and OCP-On Bypass modes via 200 mV VIN–VOUT voltage-drop comparator |
Applications
| Smartphone Power Management | USB OTG Host Supply |
|---|---|
Use Scenario: Maintaining stable 3.3 V rail for baseband processor and RF transceiver during Li-ion battery discharge from 4.2 V to 2.8 V. IC Role / Device Role / Timing Role: Synchronous boost regulator with automatic bypass - supplies regulated output while minimizing conversion loss near battery full charge. Use Value: Extends usable battery capacity by enabling system operation below 3.0 V input, with <10 µA IQ in forced bypass extending standby time. | Use Scenario: Providing 5 V power from a 3.3 V smartphone battery to enable USB peripheral enumeration and data transfer. IC Role / Device Role / Timing Role: High-efficiency boost converter with fast soft-start - delivers regulated 5 V within 600 µs to meet USB enumeration timing. Use Value: Achieves >92% efficiency at 500 mA load and 3.6 V input, eliminating need for discrete boost + LDO solutions. |
| Portable Audio Amplifier Supply | LTE/3G RF Power Boost |
Use Scenario: Generating clean 3.5 V supply for Class-D audio amplifier in wireless earbuds, where battery voltage drops below required rail. IC Role / Device Role / Timing Role: Low-noise boost regulator with <50 mVpp ripple at 1 A - powers amplifier without audible switching artifacts. Use Value: Uses 0.33 µH inductor and 20 µF total COUT to achieve <3% load regulation across 0–1500 mA, preserving audio fidelity. | Use Scenario: Delivering burst-mode 3.5 V power to LTE PA during uplink transmission, where instantaneous current demand exceeds battery capability. IC Role / Device Role / Timing Role: Valley-current-limited boost with VSEL-triggered voltage step - pre-empts undershoot during 100 ns load transients. Use Value: Limits peak inductor current to 2.9 A (typ), preventing saturation and maintaining regulation during 1250 mA load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61236RTER | Fixed 3.3 V output, 2.5 MHz, 1.5 A max, but no forced bypass mode; IQ = 20 µA in shutdown only | Lacks true bypass functionality - less suitable for systems requiring ultra-low-IQ sleep states | Choose when bypass mode is unnecessary and TI ecosystem integration is preferred |
| MAX17222ETA+T | 3.3 V output, 2.5 MHz, 1.2 A max, includes automatic bypass but no forced bypass pin; IQ = 1.5 µA in shutdown | No dedicated BYP pin - bypass activation relies solely on VIN–VOUT differential, limiting control flexibility | Choose when deterministic forced bypass control is not required and smaller footprint is critical |
Compared with TPS61236RTER and MAX17222ETA+T, the FAN48630BUC33X uniquely combines programmable forced bypass (≤10 µA IQ), dual-setpoint VOUT (3.30/3.49 V), and valley-current limiting for robust RF PA support - making it optimal for battery-constrained mobile designs demanding both efficiency and precise power-state control.
Availability
FAN48630BUC33X is available at Aetrix Electronics and suitable for smartphone power management, USB OTG host supply, portable audio amplifier supply, and LTE/3G RF power boost applications requiring stable component supply across high-volume production cycles.
Supply support for FAN48630BUC33X 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and portable electronics.
The FAN48630BUC33X belongs to the TINYBOOST® family of high-frequency synchronous boost regulators, designed specifically to extend runtime and enable new battery chemistries in space-constrained, battery-powered consumer devices.
FAQ
What is the exact output voltage setting of the FAN48630BUC33X?
The FAN48630BUC33X is factory-configured for dual-output voltage options: 3.30 V and 3.49 V, as specified in Table 1 of the datasheet. This dual-setpoint design allows system designers to select the optimal rail voltage for noise margin, efficiency, or compatibility with downstream ICs without changing the BOM. The actual regulated output remains within ±2% accuracy across load, line, and temperature conditions per the Electrical Characteristics table.
Does the FAN48630BUC33X support forced bypass mode, and how is it activated?
Yes, the FAN48630BUC33X supports forced bypass mode, activated by pulling the BYP pin (C1) logic-low. When asserted, the device disables most internal circuitry-including switching, regulation, and protection features-reducing quiescent current to 4–10 µA depending on configuration (Low IQ or OCP On). This mode establishes a low-impedance path from VIN to VOUT using internal P-channel switches, making it ideal for ultra-low-power standby states in portable electronics.
What inductor value is recommended for the FAN48630BUC33X, and why is 0.33 µH specified?
The FAN48630BUC33X datasheet recommends a 0.33 µH inductor specifically for the FAN48630UC33X and FAN48630BUC33X variants to improve transient response over the standard 0.47 µH option. This lower inductance reduces current slew rate, enabling faster recovery from load steps while maintaining stability with the 2.5 MHz switching frequency. It is validated for use with the device's valley-current limit architecture and does not compromise thermal performance under 1500 mA continuous load.
How does the FAN48630BUC33X handle thermal protection, and what are the trip thresholds?
The FAN48630BUC33X implements two-tier thermal protection: a warning threshold at 120 °C (T120A) that pulls the PG pin low and releases at 100 °C (T120R), and a hard shutdown at 150 °C (T150T) with 20 °C hysteresis (T150H). These thresholds are measured at the die junction and are independent of ambient conditions. The device resumes normal operation only after cooling below the release point, ensuring reliable protection during sustained overload or poor PCB thermal design.
Is the FAN48630BUC33X RoHS compliant and lead-free?
Yes, the FAN48630BUC33X is Pb-free, halogen-free/BFR-free, and fully RoHS compliant per the manufacturer's declaration in the Features section of the datasheet. It meets EU Directive 2011/65/EU and subsequent amendments, with all homogeneous materials verified to contain ≤0.1 wt% lead and ≤0.1 wt% each of mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), and polybrominated diphenyl ethers (PBDE).
FAN48630BUC33X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- TinyBoost®
- Package/Case:
- 16-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.35V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V, 3.49V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLCSP (1.78x1.78)
FAN48630BUC33X FAQ
1.How can I place an order for FAN48630BUC33X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN48630BUC33X 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 FAN48630BUC33X reliable?
The price and inventory of FAN48630BUC33X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN48630BUC33X is usually 5 days.
3.What payment methods are accepted for FAN48630BUC33X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN48630BUC33X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN48630BUC33X?
FAN48630BUC33X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN48630BUC33X 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 FAN48630BUC33X?
For technical support, including FAN48630BUC33X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN48630BUC33X requirements.
6.How does Aetrix verify that FAN48630BUC33X is sourced from the original manufacturer or authorized distributors?
All FAN48630BUC33X 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 FAN48630BUC33X meets industry standards.
7.What is the process for return or replacement of FAN48630BUC33X?
All FAN48630BUC33X units undergo pre-shipment inspection (PSI). If there is an issue with FAN48630BUC33X, 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 FAN48630BUC33X part is unused and in its original packaging.
Return procedure for FAN48630BUC33X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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