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onsemi FAN48617UC50X
- Part No.:
- FAN48617UC50X
- Manufacturer:
- onsemi
- Package:
- 9-UFBGA, WLCSP
- Datasheet:
-
FAN48617UC50X.pdf
- Description:
- IC REG BOOST 5V 1A 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:5,421
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Product details
Overview
FAN48617UC50X from onsemi is a fixed-output, synchronous PWM-only boost regulator in WLCSP9 package, delivering 5.0 V at up to 1000 mA from 2.7–4.5 V Li-ion input. It features forced pass-through mode via EN pin, true load disconnect, and maintains regulation even below minimum system battery voltage. Used in Class-D audio amplifiers and NFC modules where compact size and high efficiency are critical.
For engineers reviewing the FAN48617UC50X datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.3 MHz typical switching frequency, 97% peak efficiency, 63 mΩ N-channel switch RDS(ON), integrated synchronous rectification, and support for 0402 capacitors and 2016 inductors in space-constrained portable designs.
Technical Context
The FAN48617UC50X uses current-mode PWM control with soft-start sequencing (LIN1/LIN2/SS/BST/PT modes) and valley-current limiting for overload protection. Its modulator supports automatic transition between linear startup, boost regulation, and forced pass-through operation based on VIN vs. VOUT and EN state.
It integrates dual power MOSFETs - an N-channel boost switch and P-channel synchronous rectifier - with dedicated AGND and PGND pins for noise isolation. Thermal shutdown activates at 150°C junction temperature, with automatic restart after ~20°C cooldown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% DC accuracy across 0–1000 mA load and 2.7–4.5 V input. |
| Max Output Current | 1000 mA continuous; limited by thermal resistance (θJA = 50°C/W) and internal current protection. |
| Switching Frequency | 2.3 MHz typical; enables use of small 1 µH 2016 inductors and 0402 ceramic capacitors. |
| Quiescent Current | 95 µA in no-switching standby; drops to 3.5 µA in forced pass-through mode. |
| UVLO Threshold | 2.20 V with 150 mV hysteresis; prevents erratic startup during battery sag. |
| Efficiency | Up to 97% at mid-load; enabled by synchronous rectification and low RDS(ON) (63 mΩ / 52 mΩ). |
| Operating Temp | −40°C to +85°C ambient; junction limited to +125°C under recommended conditions. |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP9), 1.215 mm × 1.215 mm × 0.581 mm, 0.4 mm pitch, case 567QW. Marking: K2 prefix with lot/date/assembly codes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (A1, A2) | Regulated output node | Direct connection point for output capacitor; must be routed with shortest possible path to PGND pins. |
| VIN (A3) | Main input supply | Connects to Li-ion battery and input capacitor; powers internal circuitry and boost switch. |
| SW (B1, B2) | Switching node | Drives external 1 µH inductor; high dv/dt node requiring tight layout and minimal trace length. |
| EN (B3) | Enable & mode control | Pull HIGH to enable boost; pull LOW after startup to force pass-through mode; no shutdown capability. |
| PGND (C1, C2) | Power ground return | Low-impedance return path for output capacitor and power stage; requires direct, low-inductance connection. |
| AGND (C3) | Analog reference ground | Signal reference for feedback and control circuits; tie to PGND at single point only to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Forced Pass-Through Mode | EN pin pulls device into direct conduction when VIN > VOUT, bypassing switching losses and reducing IQ to 3.5 µA. |
| True Load Disconnect | Internal switches isolate VOUT from VIN during fault or disable, preventing backfeed and enabling clean system power sequencing. |
| Synchronous Rectification | Integrated P-channel MOSFET replaces diode, eliminating forward voltage drop and improving light-load efficiency. |
| Short-Circuit Protection | Valley-current limiting triggers within BST mode; halved during soft-start to prevent inrush damage. |
| Compact External Components | Supports standard 0402-case capacitors and 2016-size 1 µH inductors - ideal for <10 mm² PCB area budgets. |
Applications
| Class-D Audio Amplifier Power Supply | Smartphone NFC Module Boost |
|---|---|
Use Scenario: Powers Class-D amplifier ICs requiring stable 5 V rail from declining single-cell Li-ion battery (2.8–4.2 V). IC Role / Device Role / Timing Role: Fixed-output synchronous boost regulator with fast transient response and low output ripple. Use Value: Maintains 5 V regulation down to 2.7 V input and delivers 1000 mA peak current without external compensation. | Use Scenario: Supplies 5 V to NFC transceivers in smartphones and wearables during active communication bursts. IC Role / Device Role / Timing Role: High-efficiency, low-noise boost converter with forced pass-through for battery-saver mode. Use Value: Achieves 97% efficiency at 300 mA and enables seamless transition between boost and direct-conduction modes. |
| Portable Medical Sensor Hub | Bluetooth LE Audio Earbud Charging Circuit |
Use Scenario: Powers multi-sensor fusion modules (ECG, SpO₂, motion) in compact wearable health monitors. IC Role / Device Role / Timing Role: Compact, thermally robust boost regulator supporting intermittent 500 mA loads with low quiescent current. Use Value: Delivers regulated 5 V using only 0402 caps and 2016 inductor - fits within 4×4 mm board footprint. | Use Scenario: Generates 5 V for charging management ICs in true wireless stereo (TWS) earbuds from shared battery rail. IC Role / Device Role / Timing Role: Synchronous boost with true load disconnect ensures no reverse current during battery balancing or firmware updates. Use Value: Prevents backfeed into main battery during charging sequence, enhancing safety and BMS reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610995RTER | Higher 5.2 V output; 1.2 MHz switching; lower 1.2 µA shutdown IQ but no forced pass-through mode. | Lacks EN-controlled pass-through; better for always-on ultra-low-power sensors than dynamic load scenarios. | Select when lowest shutdown IQ is critical and pass-through functionality is unnecessary. |
| MAX17222ATA+T | 5.0 V output; 1.2 MHz; 2.5 µA IQ in shutdown; includes power-good flag but no true load disconnect. | No load isolation during fault; requires external circuitry for clean power sequencing in multi-rail systems. | Choose when power-good signaling is required and board space allows larger 2×2 mm QFN package. |
Compared with TPS610995RTER and MAX17222ATA+T, the FAN48617UC50X uniquely combines forced pass-through mode, true load disconnect, and WLCSP9 footprint - making it optimal for space-constrained portable devices needing dynamic rail control and fault-safe isolation.
Availability
FAN48617UC50X is available at Aetrix Electronics and suitable for Class-D audio amplifiers, smartphone NFC modules, portable medical sensor hubs, and Bluetooth LE audio earbud charging circuits requiring stable component supply, consistent WLCSP9 packaging, and guaranteed 5.0 V ±2% regulation.
Supply support for FAN48617UC50X 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier focused on energy-efficient electronics for automotive, industrial, cloud, and portable applications.
The FAN48617UC50X belongs to onsemi's TINYBOOST family - designed specifically for ultra-compact, high-efficiency boost conversion in battery-powered portable devices with stringent size and thermal constraints.
FAQ
What is the input voltage range supported by the FAN48617UC50X?
The FAN48617UC50X supports an input voltage range of 2.7 V to 4.5 V, optimized for single-cell Li-ion and advanced battery chemistries. Its under-voltage lockout activates at 2.20 V with 150 mV hysteresis to ensure reliable startup and prevent brownout operation. This range allows the FAN48617UC50X to maintain regulated 5.0 V output even as the battery discharges below typical system cutoff voltages.
Does the FAN48617UC50X support forced pass-through mode, and how is it activated?
Yes, the FAN48617UC50X supports forced pass-through mode via the EN pin. After initial startup in boost mode, pulling EN LOW forces the device into direct conduction - bypassing switching losses and reducing quiescent current to 3.5 µA. The FAN48617UC50X cannot start in pass-through mode; EN must be held HIGH for ≥350 µs before being pulled LOW to ensure reliable entry. This feature is unique to the FAN48617UC50X within its class.
What package type and dimensions does the FAN48617UC50X use?
The FAN48617UC50X uses a Wafer-Level Chip-Scale Package (WLCSP9) measuring 1.215 mm × 1.215 mm × 0.581 mm with 0.4 mm pitch and case number 567QW. It has nine solder bumps arranged in a 3×3 grid, with specific pin assignments defined in the datasheet (e.g., VOUT on A1/A2, EN on B3). This ultra-compact package enables placement in tight spaces typical of smartphones and wearables where the FAN48617UC50X is commonly deployed.
How does the FAN48617UC50X handle overcurrent and fault conditions?
The FAN48617UC50X implements valley-current limiting during boost operation and halves the limit during soft-start to prevent inrush damage. Fault conditions - including failure to reach regulation, sustained current limit, or VIN − VOUT > 300 mV - trigger a 20 ms automatic restart timer. During fault, the FAN48617UC50X presents high impedance between VIN and VOUT, ensuring safe isolation. Thermal shutdown engages at 150°C junction temperature with auto-restart after ~20°C cooldown.
Can the FAN48617UC50X be used with standard 0402 capacitors and 2016 inductors?
Yes, the FAN48617UC50X is explicitly designed for use with standard 0402-case ceramic capacitors (e.g., 10 µF X5R, 6.3 V) and 2016-size 1 µH inductors (e.g., DFE201610E-1R0M). The datasheet specifies minimum effective capacitance (CEFF) requirements - 4.2 µF for ≤500 mA and 6.3 µF for ≤1000 mA loads - and validates stability with these components. This compatibility simplifies BOM sourcing and reduces layout complexity for the FAN48617UC50X in high-volume portable designs.
FAN48617UC50X 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):
- 2.7V
- Voltage - Input (Max):
- 4.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLCSP (1.22x1.22)
FAN48617UC50X FAQ
1.How can I place an order for FAN48617UC50X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN48617UC50X 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 FAN48617UC50X reliable?
The price and inventory of FAN48617UC50X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN48617UC50X is usually 5 days.
3.What payment methods are accepted for FAN48617UC50X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN48617UC50X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN48617UC50X?
FAN48617UC50X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN48617UC50X 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 FAN48617UC50X?
For technical support, including FAN48617UC50X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN48617UC50X requirements.
6.How does Aetrix verify that FAN48617UC50X is sourced from the original manufacturer or authorized distributors?
All FAN48617UC50X 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 FAN48617UC50X meets industry standards.
7.What is the process for return or replacement of FAN48617UC50X?
All FAN48617UC50X units undergo pre-shipment inspection (PSI). If there is an issue with FAN48617UC50X, 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 FAN48617UC50X part is unused and in its original packaging.
Return procedure for FAN48617UC50X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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