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onsemi FAN48630UC315X
- Part No.:
- FAN48630UC315X
- Manufacturer:
- onsemi
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
FAN48630UC315X.pdf
- Description:
- IC REG BOOST 3.15V/3.33V 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
FAN48630UC315X from onsemi is a synchronous boost regulator with integrated power switches and true bypass mode, designed for single-cell Li-ion battery systems requiring 3.15 V / 3.33 V fixed output at up to 1500 mA load current, 2.5 MHz switching frequency, and ultra-low 4–10 µA forced bypass quiescent current. It enables brownout prevention and USB OTG power in space-constrained portable electronics.
For engineers reviewing the FAN48630UC315X datasheet, pinout, applications, or equivalent options, key selection criteria include its WLCSP-16 package, dual-output-voltage option (3.15 V / 3.33 V), fast soft-start (600 µs), low-IQ forced bypass mode, and guaranteed regulation down to VIN = 2.35 V at 1500 mA.
Technical Context
The FAN48630UC315X operates in current-mode control with valley-current limiting and supports seamless transitions between boost (CCM/DCM) and automatic bypass modes based on VIN vs. VOUT_TARGET comparison. Its modulator logic includes linear startup (LIN1/LIN2), soft-start ramping, and fault recovery with 20 ms restart timer.
Bypass entry requires VIN > VOUT_TARGET + 25 mV hysteresis and no switching for 5 s; exit occurs when VOUT reaches target voltage. Forced bypass disables most internal circuitry except bypass switches Q1 and Q3, enabling <10 µA IQ while maintaining VIN-to-VOUT conduction path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.15 V / 3.33 V fixed dual-option; sets regulated output level for system rail generation |
| Max Load Current | 1500 mA at VIN ≥ 2.35 V; supports high-current peripherals like RF power amplifiers |
| Switching Frequency | 2.5 MHz typical; enables use of small 0.47 µH inductor and compact 0603 capacitors |
| Forced Bypass IQ | 4–10 µA (Low IQ variant); extends battery life during standby by disabling bias circuits |
| Input Voltage Range | 2.35 V to 5.5 V; accommodates full discharge curve of single-cell Li-ion (2.7–4.2 V) |
| Efficiency | Up to 96% at mid-load; minimizes thermal stress and extends runtime in portable devices |
| Package | 16-bump WLCSP, 1.78 × 1.78 × 0.586 mm; enables ultra-thin PCB designs with minimal footprint |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP), 16-bump, 0.4 mm pitch, 1.78 mm × 1.78 mm × 0.586 mm, case 567SY.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (EN) | Enable control input | Logic-level enable (VIH ≥ 1.2 V, VIL ≤ 0.4 V); must be driven by 1.8 V logic, not VIN |
| A2 (PG) | Power Good open-drain output | Asserts HIGH after successful soft-start; pulled LOW during overload or die temp >120°C |
| A3–A4 (VIN) | Main power input | Connects directly to Li-ion battery; supports UVLO threshold of 2.35 V with 200 mV hysteresis |
| B1 (VSEL) | Output voltage select | Selects between 3.15 V and 3.33 V targets; used to pre-boost before load transients |
| B2, C2, D1 (AGND) | Analog ground reference | Signal return for internal references and error amplifier; separate from PGND |
| B3–B4 (VOUT) | Regulated output | Delivers stable 3.15/3.33 V; requires COUT placed adjacent to PGND/VOUT pins |
| C1 (BYP) | Forced bypass control | Pull LOW to activate ultra-low-IQ bypass mode; reverse current blocked until VOUT < VIN |
| C3–C4 (SW) | Switching node | Connects to inductor; carries high di/dt; requires short, low-inductance trace |
| D2–D4 (PGND) | Power ground return | High-current return path for boost switch and sync rectifier; shortest possible path to COUT |
Key Features
| Feature | Design Value |
|---|---|
| True bypass operation | VIN-to-VOUT conduction path with RDS(ON)P_BYP ≤ 85 mΩ; eliminates switching losses when VIN > VOUT_TARGET |
| Soft-start with load disconnect | 600 µs EN-to-regulation time (FAST); prevents inrush current and ensures controlled VOUT ramp |
| Internal synchronous rectifier | Integrated P-channel sync rectifier (RDS(ON)P ≤ 85 mΩ); eliminates external Schottky loss and improves efficiency |
| VSEL-controlled output optimization | VSEL pin adjusts VOUT_TARGET in fixed steps; mitigates undershoot during line/load transients |
| Short-circuit protection | Active in auto-bypass and OCP-On variants; triggers FAULT if VIN–VOUT drop exceeds 200 mV |
Applications
| Cell Phone Power Management | USB OTG Host Supply |
|---|---|
Use Scenario: Single-cell Li-ion battery powers baseband processor and display backlight under varying load conditions including burst transmission. IC Role / Device Role / Timing Role: Boost regulator maintains stable 3.33 V rail during battery voltage sag below 3.0 V; bypass mode engages when battery recovers above 3.33 V. Use Value: Prevents brownout resets and extends usable battery capacity by supporting full discharge down to 2.35 V. | Use Scenario: Smartphone acts as USB host to charge accessories or connect peripherals while operating on battery. IC Role / Device Role / Timing Role: Provides regulated 5 V (via external LDO or secondary boost) or direct 3.15 V supply to USB VBUS or data-line power; forced bypass reduces standby drain. Use Value: Enables USB OTG functionality without compromising battery life-quiescent current drops to 4 µA in forced bypass. |
| Portable Audio Amplifier Boost | LTE/3G RF Power Supply |
Use Scenario: Class-D audio amplifier requires clean, stable 3.33 V rail to drive speakers at peak volume without clipping. IC Role / Device Role / Timing Role: Synchronous boost delivers low-noise, high-current 3.33 V output; VSEL dynamically raises VOUT_TARGET before transient peaks. Use Value: Reduces output ripple (<50 mVpp at 1500 mA) and improves THD+N by minimizing supply sag during dynamic loads. | Use Scenario: LTE power amplifier demands fast transient response and tight voltage regulation during high-Power-class transmission bursts. IC Role / Device Role / Timing Role: Regulates 3.15 V rail with <±4% load transient response; bypass mode sustains rail during receive intervals to minimize IQ. Use Value: Ensures PA linearity and EVM compliance across battery voltage range while reducing average system IQ by >50%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610995YFFR | Fixed 3.3 V output, 1.2 MHz switching, 1200 mA max load, 0.8 µA shutdown IQ | No bypass mode; lower efficiency at light load due to lack of DCM optimization | Choose for ultra-low shutdown IQ where bypass functionality is unnecessary |
| MAX17222ETA+T | Adjustable output (0.4–5.25 V), 2.5 MHz, 1000 mA max load, 2.5 µA shutdown IQ | No forced bypass; lacks VSEL and PG pins; smaller WLP-12 package | Choose for design flexibility with adjustable VOUT where dual fixed outputs and PG monitoring are not required |
Compared with TPS610995YFFR and MAX17222ETA+T, the FAN48630UC315X uniquely combines dual fixed outputs (3.15 V / 3.33 V), true bypass mode with sub-10 µA IQ, and integrated PG monitoring-making it optimal for battery-powered systems requiring both high efficiency and robust brownout immunity.
Availability
FAN48630UC315X is available at Aetrix Electronics and suitable for cell phone power management, USB OTG host supply, and portable audio amplifier boost applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant WLCSP packaging.
Supply support for FAN48630UC315X 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and edge applications.
The FAN48630UC315X belongs to the TINYBOOST® family of high-frequency synchronous boost regulators, engineered specifically for ultra-compact, battery-powered portable electronics demanding high efficiency, low quiescent current, and seamless bypass operation.
FAQ
What is the exact output voltage configuration of the FAN48630UC315X?
The FAN48630UC315X provides two factory-trimmed output voltage options: 3.15 V and 3.33 V. These values are fixed and non-adjustable; the specific pair is selected at manufacture and marked as "J5" on the top of the WLCSP package. The device does not support external resistor programming or dynamic adjustment beyond VSEL-triggered step-up during transients.
How does forced bypass mode function in the FAN48630UC315X?
In forced bypass mode, the FAN48630UC315X disables its boost switching circuitry and fully enhances internal P-channel bypass switches (Q1 and Q3), creating a low-impedance VIN-to-VOUT path with RDS(ON)P_BYP ≤ 85 mΩ. This reduces quiescent current to 4–10 µA. The device waits for VOUT to fall below VIN before engaging bypass to prevent reverse current flow into the battery.
What is the minimum input voltage required for full 1500 mA output at 3.15 V with the FAN48630UC315X?
The FAN48630UC315X guarantees 1500 mA continuous output current at 3.15 V with a minimum input voltage of 2.35 V, provided junction temperature remains below 120°C. This specification is validated per Table 7's VMIN_1.5A parameter and enables operation across the full discharged state of a single-cell Li-ion battery.
Does the FAN48630UC315X support automatic transition between boost and bypass modes?
Yes, the FAN48630UC315X automatically transitions from boost mode to bypass mode when VIN exceeds VOUT_TARGET + 25 mV and no switching activity has occurred for 5 seconds. Exit from bypass occurs when VOUT falls below the target voltage. This hysteresis prevents oscillation and ensures stable rail delivery during battery voltage fluctuations.
What package type and dimensions does the FAN48630UC315X use?
The FAN48630UC315X uses a 16-bump Wafer-Level Chip-Scale Package (WLCSP) with 0.4 mm pitch, measuring 1.78 mm × 1.78 mm × 0.586 mm (case 567SY). It features a 4×4 bump array with defined AGND, PGND, and signal pin placements per Figure 3 and Table 3 of the datasheet.
FAN48630UC315X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.35V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.15V, 3.33V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.5A
- 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)
FAN48630UC315X FAQ
1.How can I place an order for FAN48630UC315X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN48630UC315X 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 FAN48630UC315X reliable?
The price and inventory of FAN48630UC315X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN48630UC315X is usually 5 days.
3.What payment methods are accepted for FAN48630UC315X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN48630UC315X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN48630UC315X?
FAN48630UC315X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN48630UC315X 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 FAN48630UC315X?
For technical support, including FAN48630UC315X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN48630UC315X requirements.
6.How does Aetrix verify that FAN48630UC315X is sourced from the original manufacturer or authorized distributors?
All FAN48630UC315X 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 FAN48630UC315X meets industry standards.
7.What is the process for return or replacement of FAN48630UC315X?
All FAN48630UC315X units undergo pre-shipment inspection (PSI). If there is an issue with FAN48630UC315X, 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 FAN48630UC315X part is unused and in its original packaging.
Return procedure for FAN48630UC315X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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