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onsemi FAN48630UC33X
- Part No.:
- FAN48630UC33X
- Manufacturer:
- onsemi
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
FAN48630UC33X.pdf
- Description:
- IC REG BOOST PROG 1.5A 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
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Product details
Overview
FAN48630UC33X from onsemi is a synchronous boost regulator with integrated power switches, designed for single-cell Li-ion battery systems requiring 3.30 V to 3.49 V fixed output voltage, 1500 mA continuous load capability at VIN ≥ 2.35 V, and true bypass operation when VIN exceeds VOUT target. It enables brownout prevention and USB OTG power in space-constrained portable electronics.
For engineers reviewing the FAN48630UC33X datasheet, pinout, applications, or equivalent options, key selection considerations include its 2.5 MHz switching frequency, forced bypass mode with <10 µA quiescent current, WLCSP-16 package (1.78 × 1.78 mm), internal synchronous rectifier, and ±2% output voltage accuracy under DC conditions.
Technical Context
The FAN48630UC33X implements valley-current-mode control with automatic transition between Continuous Conduction Mode (CCM) at 2.5 MHz and Discontinuous Conduction Mode (DCM) at light loads. Its modulator logic manages four operating states: Linear Startup (LIN), Soft-Start (SS), Boost (BST), and Bypass (BPS), triggered by VIN–VOUT relationship and load demand.
Bypass entry occurs when VIN > VOUT_TARGET + 25 mV (25 mV hysteresis), engaging low-RDS(ON) P-channel switches (RDS(ON)P_BYP = 65–85 mΩ) to deliver VIN directly to VOUT. Forced Bypass mode disables most internal circuitry except critical protection comparators, achieving ≤10 µA IQ in Low IQ variants like FAN48630UC33X.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.30 V / 3.49 V dual-option setting; ensures stable system rail for 3.3 V logic without external feedback resistors. |
| Max Load Current | 1500 mA at VIN = 2.6 V boosting to 3.5 V; supports high-pulse LTE/RF PA and audio amplifiers. |
| Switching Frequency | 2.5 MHz typical; enables use of ultra-small 0.33 µH inductor and 0603 capacitors for minimal PCB footprint. |
| Quiescent Current | ≤10 µA in Forced Bypass (Low IQ mode); extends battery life during standby in always-on sensor nodes. |
| Efficiency | Up to 96% at 500 mA; minimizes thermal rise in sealed handheld enclosures. |
| Package | WLCSP-16 (1.78 × 1.78 × 0.586 mm, 0.4 mm pitch); compatible with fine-pitch SMT assembly and high-density mobile PCBs. |
| Protection Features | Short-circuit detection via 200 mV VIN–VOUT drop threshold, thermal shutdown at 150°C, and UVLO with 200 mV hysteresis. |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP), 16-bump, 0.4 mm pitch, 1.78 mm × 1.78 mm body, 0.586 mm height (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 connected to VIN. |
| A2 (PG) | Power Good open-drain output | Signals regulation status (HIGH = OK); pulled LOW during overload, thermal fault (>120°C), or FAULT condition. |
| A3–A4 (VIN) | Main input power connection | Accepts 2.35–5.5 V; connects directly to Li-ion battery anode; requires local 4.7 µF ceramic decoupling. |
| B1 (VSEL) | Output voltage select | Adjusts VOUT_TARGET upward in fixed steps to mitigate transient undershoot or prepare for load surge. |
| B2, C2, D1 (AGND) | Analog ground reference | Signal return for internal references and comparators; must be tied to PGND at single point near device. |
| B3–B4 (VOUT) | Regulated output node | Delivers 3.30/3.49 V; requires low-ESR ceramic capacitors (≥20 µF total) placed adjacent to PGND pins. |
| C1 (BYP) | Forced Bypass mode control | Pull LOW to activate ultra-low-IQ bypass; internal weak pull-down (300 kΩ) ensures safe default state. |
| C3–C4 (SW) | Switching node | Connects to 0.33 µH inductor; carries high di/dt; requires shortest possible trace to minimize EMI and ringing. |
| D2–D4 (PGND) | Power ground return | High-current return path for inductor and output capacitor; must use multiple vias to inner ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| True Bypass Operation | Enables direct VIN-to-VOUT conduction with RDS(ON)P_BYP ≤ 85 mΩ when VIN > VOUT_TARGET + 25 mV, eliminating switching losses. |
| Synchronous Rectification | Integrates N-channel boost switch (RDS(ON)N = 85–120 mΩ) and P-channel sync rectifier (RDS(ON)P = 65–85 mΩ), removing external Schottky diode. |
| Soft-Start with Load Disconnect | Prevents inrush current via controlled reference ramp; disconnects load during startup until regulation is achieved. |
| VSEL-Controlled Output Adjustment | Allows dynamic VOUT_TARGET increase in 20 s steps to counteract line/load transients without changing hardware. |
| Short-Circuit Protection | Detects overcurrent via 200 mV VIN–VOUT differential during bypass; asserts FAULT and disables output within 2 ms. |
Applications
| Cell Phone Power Management | USB OTG Host Supply |
|---|---|
Use Scenario: Maintaining 3.3 V system rail as single-cell Li-ion discharges from 4.2 V to 2.8 V while powering baseband processor and display backlight. IC Role / Device Role / Timing Role: Primary boost converter with auto-bypass transition; regulates VOUT during battery sag and delivers full 1500 mA peak current during call transmission bursts. Use Value: Prevents brownout resets by sustaining regulated output down to 2.35 V input, leveraging 96% efficiency to extend talk time. |
Use Scenario: Providing 5 V/500 mA to USB peripherals (keyboard, flash drive) from a smartphone's 3.3 V rail using charge-pump or boost topology. IC Role / Device Role / Timing Role: High-efficiency boost stage enabling OTG functionality without external inductor or diode; enters forced bypass when host VBUS is present. Use Value: Reduces bill-of-materials count and PCB area by integrating power switches and bypass logic in 1.78 mm² WLCSP. |
| Portable Audio Amplifier Supply | LTE/3G RF Power Boost |
Use Scenario: Generating clean 3.3 V supply for Class-D audio amplifier ICs in Bluetooth speakers, where battery voltage drops below required rail during playback. IC Role / Device Role / Timing Role: Low-noise boost regulator with <50 mVpp ripple at 1 A; uses fast soft-start (600 µs) to avoid pop/click during power-on. Use Value: Eliminates audible artifacts via tight output regulation (±2%) and rapid transient response (<4% deviation at 500–1250 mA step). |
Use Scenario: Delivering pulsed 3.5 V/1.5 A to power amplifier stages in cellular modems during LTE uplink transmission bursts. IC Role / Device Role / Timing Role: High-current boost controller with valley-current limiting (2.9 A typ.) and thermal foldback to sustain RF output without thermal shutdown. Use Value: Supports 1500 mA continuous and short-term 1950 mA overload per Figure 23, enabling reliable high-data-rate transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610995YFFR | 3.3 V fixed output, 1.2 A max, 1.2 MHz switching, 0.7 µH inductor required | Lacks true bypass mode; higher IQ (0.6 µA shutdown vs. 5 µA for FAN48630UC33X) | Choose for lower cost where 1.2 A load suffices and bypass is unnecessary. |
| MAX17222ETA+T | 3.3 V fixed output, 1.0 A max, 2.5 MHz, 0.47 µH inductor, no forced bypass pin | Auto-bypass only; no BYP pin for deterministic ultra-low-IQ mode activation | Choose when board space allows 0.47 µH inductor and forced bypass control is not required. |
Compared with TPS610995YFFR and MAX17222ETA+T, the FAN48630UC33X uniquely combines 1500 mA capability, 2.5 MHz operation with 0.33 µH inductor support, and a dedicated BYP pin for guaranteed sub-10 µA forced bypass - making it optimal for high-pulse, battery-sensitive designs where both performance and standby longevity are critical.
Availability
FAN48630UC33X is available at Aetrix Electronics and suitable for cell phone power management, USB OTG host supply, and portable audio amplifier supply requiring stable component supply across high-mix, low-volume production runs.
Supply support for FAN48630UC33X 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 electronics, delivering silicon solutions for automotive, industrial, cloud, and portable applications.
The FAN48630UC33X belongs to the TINYBOOST® family of ultra-compact synchronous boost regulators, engineered specifically for space- and power-constrained Li-ion-powered portable devices demanding high efficiency and seamless bypass functionality.
FAQ
What is the exact output voltage range of the FAN48630UC33X?
The FAN48630UC33X provides a factory-set dual-output voltage option of 3.30 V / 3.49 V, as confirmed in Table 1 of the datasheet. This fixed setting eliminates external resistor networks and ensures ±2% DC output voltage accuracy across temperature and load, making it ideal for 3.3 V system rails where precision and simplicity are required. The FAN48630UC33X does not support adjustable output via feedback pins.
Does the FAN48630UC33X support true bypass mode, and how is it activated?
Yes, the FAN48630UC33X supports true bypass mode in two ways: automatically when VIN exceeds VOUT_TARGET + 25 mV (with 25 mV hysteresis), and forcibly via the BYP pin. Pulling BYP LOW activates Forced Bypass Mode, disabling switching and enabling low-RDS(ON) P-channel paths (≤85 mΩ) between VIN and VOUT. In this mode, the FAN48630UC33X draws ≤10 µA quiescent current, significantly extending battery life during idle periods.
What inductor value is recommended for the FAN48630UC33X, and why is 0.33 µH specified?
The FAN48630UC33X datasheet explicitly recommends a 0.33 µH inductor for FAN48630UC33X and FAN48630BUC33X variants to improve transient response, as stated in the "Startup" section on page 12. This value is lower than the standard 0.47 µH used for other variants, enabling faster current slew rates and tighter regulation during sudden load steps - critical for RF PA and audio burst applications where the FAN48630UC33X is deployed.
How does the FAN48630UC33X handle thermal protection, and what are the thresholds?
The FAN48630UC33X features dual thermal thresholds: T120A (120°C activation) triggers PG de-assertion to warn the system, while T150T (150°C) initiates full thermal shutdown. After shutdown, restart occurs only after cooling to T150H (130°C, 20°C hysteresis). These thresholds are fixed and non-adjustable. The FAN48630UC33X also provides junction-to-board thermal resistance (θJB = 42°C/W) to aid PCB thermal design for sustained 1500 mA operation.
Can the FAN48630UC33X be used with input voltages below 2.35 V?
No - the FAN48630UC33X has a guaranteed minimum input voltage of 2.35 V, defined by its UVLO threshold (VUVLO = 2.20–2.35 V, with 200 mV hysteresis). Operation below 2.35 V is outside the recommended operating conditions and may result in unstable regulation, failure to start, or undefined behavior. For sub-2.35 V battery chemistries, alternative regulators with lower UVLO must be selected; the FAN48630UC33X is strictly validated for 2.35–5.5 V input range.
FAN48630UC33X 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)
FAN48630UC33X FAQ
1.How can I place an order for FAN48630UC33X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN48630UC33X 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 FAN48630UC33X reliable?
The price and inventory of FAN48630UC33X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN48630UC33X is usually 5 days.
3.What payment methods are accepted for FAN48630UC33X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN48630UC33X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN48630UC33X?
FAN48630UC33X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN48630UC33X 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 FAN48630UC33X?
For technical support, including FAN48630UC33X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN48630UC33X requirements.
6.How does Aetrix verify that FAN48630UC33X is sourced from the original manufacturer or authorized distributors?
All FAN48630UC33X 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 FAN48630UC33X meets industry standards.
7.What is the process for return or replacement of FAN48630UC33X?
All FAN48630UC33X units undergo pre-shipment inspection (PSI). If there is an issue with FAN48630UC33X, 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 FAN48630UC33X part is unused and in its original packaging.
Return procedure for FAN48630UC33X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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