My Inquiry
My Account
onsemi FAN48610BUC45X
- Part No.:
- FAN48610BUC45X
- Manufacturer:
- onsemi
- Package:
- 9-UFBGA, WLCSP
- Datasheet:
-
FAN48610BUC45X.pdf
- Description:
- IC REG BOOST 4.5V 1A 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,947
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FAN48610BUC45X from onsemi is a 2.5 MHz synchronous boost DC-DC converter in WLCSP-9 package, delivering up to 1.0 A output current at 4.5 V output with input as low as 2.5 V, featuring integrated 80 mΩ/65 mΩ N/P-channel MOSFETs, 94% peak efficiency, and ultra-small 1.215 mm × 1.215 mm footprint - used in USB OTG power delivery and portable battery-powered systems.
For engineers reviewing the FAN48610BUC45X datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range (2.5–4.8 V), output regulation accuracy (±2%), thermal shutdown at 150 °C, EN pin logic thresholds (VIH = 1.05 V, VIL = 0.4 V), and WLCSP-9 mechanical compatibility with 0.4 mm pitch.
Technical Context
The FAN48610BUC45X implements a fixed-frequency, current-mode PWM controller operating at 2.5 MHz nominal switching frequency, supporting four operational modes: Linear (LIN), Soft-Start (SS), Boost (BST), and Pass-Through (PT). It integrates dual MOSFETs with RDS(ON) of 80 mΩ (N-ch) and 65 mΩ (P-ch) at VIN = 3.6 V, enabling high-efficiency conversion across input voltages from 2.5 V to 4.8 V.
Its control architecture includes internal soft-start (600 µs), 20 ms reset delay, UVLO with 2.25 V threshold and 150 mV hysteresis, and overtemperature protection with 150 °C trip and 20 °C hysteresis. The device uses AGND and PGND separation for noise isolation and supports ceramic output capacitors ≥22 µF for stable 5.0 V output regulation under 1 A load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.5 V - no external feedback required; tight ±2% regulation over load/temperature. |
| Switching Frequency | 2.5 MHz nominal - enables use of ultra-small 0.47 µH inductor and compact 0603 MLCCs. |
| Max Output Current | 1.0 A at VOUT = 4.5 V, VIN ≥ 2.5 V - sufficient for USB OTG host mode and single-cell Li-ion applications. |
| Peak Efficiency | 94% at 500 mA, VIN = 3.6 V - minimizes thermal rise in space-constrained WLCSP package. |
| UVLO Threshold | 2.25 V with 150 mV hysteresis - prevents erratic startup during battery brownout conditions. |
| Thermal Shutdown | 150 °C with 20 °C hysteresis - protects IC and PCB during sustained overload or poor heatsinking. |
| EN Pin Logic | VIH = 1.05 V, VIL = 0.4 V - compatible with 1.8 V/3.3 V GPIO without level-shifting. |
Pinout & Package
Package: WLCSP-9 (Case 567QW), 1.215 mm × 1.215 mm × 0.38 mm, 0.4 mm pitch, bottom-side solder balls.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2 | VOUT | Regulated 4.5 V output - connects directly to load and output capacitor (COUT ≥ 22 µF). |
| A3 | VIN | Input supply (2.5–4.8 V) - feeds internal power rails and high-side switch; requires 10 µF ceramic input cap. |
| B1, B2 | SW | Switch node - connects to inductor (0.47 µH); carries high di/dt; must be routed short and wide. |
| B3 | EN | Enable control - active-high; <100 nA shutdown current; 200–400 kΩ pull-down resistance when disabled. |
| C1, C2 | PGND | Power ground - return path for inductor and output capacitor; separate from AGND to reduce noise coupling. |
| C3 | AGND | Analog ground - reference for internal error amplifier and UVLO circuitry; tied to PGND at single point. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Dual MOSFETs | 80 mΩ N-ch + 65 mΩ P-ch - eliminates external switches, reduces BOM count and layout area. |
| Ultra-Small Footprint | 1.215 mm × 1.215 mm WLCSP - fits within 11 mm² total board area, ideal for wearables and TWS earbuds. |
| Multi-Mode Operation | LIN/SS/BST/PT modes - automatically transitions between linear, boost, and pass-through based on VIN–VOUT delta. |
| Low Quiescent Current | 85 µA typical - extends battery life in always-on or standby applications. |
| Robust Protection Suite | UVLO, OTP (150 °C), overcurrent limit (3.0–3.85 A), and soft-start - ensures reliable cold-start and fault recovery. |
Applications
| USB OTG Power Delivery | Single-Cell Li-ion Systems |
|---|---|
|
Use Scenario: Providing regulated 4.5 V power from a 3.0–4.2 V Li-ion battery to enable USB On-The-Go host functionality in smartphones and tablets. IC Role / Device Role / Timing Role: Primary boost regulator managing dynamic load steps up to 1 A while maintaining ±2% output accuracy and low ripple. Use Value: Enables direct peripheral connection without external adapter; 2.5 MHz operation avoids AM radio band interference. |
Use Scenario: Supplying stable 4.5 V rail to PMICs or RF front-ends in compact IoT sensors powered by single-cell batteries. IC Role / Device Role / Timing Role: High-efficiency voltage booster operating down to 2.5 V input, supporting deep discharge battery usage. Use Value: Extends usable battery capacity by >15% versus lower-frequency boosters due to 94% peak efficiency at light loads. |
| Portable Medical Devices | Wireless Earbuds |
|
Use Scenario: Powering low-noise analog signal chains (ECG, pulse oximetry) requiring clean, stable 4.5 V from coin-cell or small Li-ion sources. IC Role / Device Role / Timing Role: Low-ripple boost converter with separated AGND/PGND and 2.5 MHz switching to minimize conducted EMI. Use Value: Meets IEC 60601-1 EMI limits without added filtering; thermal shutdown prevents overheating in sealed enclosures. |
Use Scenario: Generating 4.5 V for Bluetooth SoC and charging circuitry in true wireless stereo earbuds with sub-100 mm³ form factor. IC Role / Device Role / Timing Role: Ultra-compact WLCSP-9 boost IC enabling minimal PCB real estate usage and fast transient response. Use Value: 1.215 mm × 1.215 mm footprint allows placement under battery or speaker driver; 600 µs soft-start prevents pop-noise. |
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 4.5 V output, 2.5 MHz, 1.2 A max, 1.2 mm × 1.2 mm DSBGA-9 - slightly higher IQ (100 µA), same WLCSP footprint. | Supports wider input (1.8–5.5 V); lacks pass-through mode - less efficient at VIN > VOUT. | Choose for broader input range where pass-through is unnecessary; verify thermal performance at 1.2 A continuous. |
| MAX17222ELT+T | Adjustable output (0.6–5.25 V), 2.5 MHz, 1.0 A, 1.6 mm × 1.6 mm WLP-6 - smaller pin count, no PGND/AGND separation. | Requires external feedback resistors; lower integration - needs external MOSFETs and compensation components. | Choose when output voltage flexibility is required and board space permits larger package and extra passives. |
Compared with TPS61291DRVR and MAX17222ELT+T, the FAN48610BUC45X offers unique pass-through mode for VIN > VOUT scenarios, tighter output tolerance (±2% vs ±3%), and dedicated PGND/AGND pins for improved noise immunity - critical in sensitive analog or RF subsystems.
Availability
FAN48610BUC45X is available at Aetrix Electronics and suitable for USB OTG power delivery, single-cell Li-ion systems, and portable medical devices requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for FAN48610BUC45X 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The FAN48610BUC45X belongs to onsemi's TINYBOOST family of ultra-compact, high-frequency boost converters designed specifically for space-constrained portable electronics with stringent size and efficiency requirements.
FAQ
What is the output voltage setting of the FAN48610BUC45X?
The FAN48610BUC45X is a fixed-output boost converter with a factory-trimmed 4.5 V output voltage. It does not support external feedback adjustment. Output regulation remains within ±2% over temperature (−40 °C to +85 °C) and load (0–1.0 A), as specified in the datasheet's Electrical Characteristics table.
Does the FAN48610BUC45X require an external inductor and capacitor?
Yes, the FAN48610BUC45X requires an external 0.47 µH shielded inductor (e.g., Toko DFE201612C) and two ceramic capacitors: a 10 µF input capacitor (X5R, 0603, 6.3 V) and a minimum 22 µF output capacitor (X5R, 0603, 6.3 V, such as TDK C1608X5R0J226M). These values are validated in the datasheet's application circuit and layout guidelines.
What protection features are built into the FAN48610BUC45X?
The FAN48610BUC45X integrates UVLO (2.25 V threshold with 150 mV hysteresis), overtemperature protection (150 °C trip with 20 °C hysteresis), cycle-by-cycle overcurrent limiting (3.0–3.85 A), and soft-start (600 µs). It also features automatic mode switching (LIN/SS/BST/PT) to prevent damage during input voltage transients or reverse polarity events.
Can the FAN48610BUC45X operate with input voltage higher than its output voltage?
Yes, the FAN48610BUC45X supports Pass-Through (PT) mode when VIN exceeds VOUT by more than 300 mV. In PT mode, the P-channel MOSFET conducts directly, bypassing the boost function to achieve near-zero dropout and minimal power loss - a key advantage over standard boost-only regulators like the FAN48610BUC45X's fixed 4.5 V output.
Is the FAN48610BUC45X pin-compatible with other variants in the FAN48610 family?
No, the FAN48610BUC45X shares the same WLCSP-9 package and pinout as FAN48610UC50X and FAN48610BUC33X, but output voltage is fixed per variant (4.5 V, 5.0 V, 3.3 V respectively). All share identical pin assignments, thermal pad configuration, and electrical interface - enabling drop-in replacement only when output voltage matches system requirements.
FAN48610BUC45X 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):
- 4.5V
- 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)
FAN48610BUC45X FAQ
1.How can I place an order for FAN48610BUC45X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN48610BUC45X 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 FAN48610BUC45X reliable?
The price and inventory of FAN48610BUC45X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN48610BUC45X is usually 5 days.
3.What payment methods are accepted for FAN48610BUC45X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN48610BUC45X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN48610BUC45X?
FAN48610BUC45X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN48610BUC45X 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 FAN48610BUC45X?
For technical support, including FAN48610BUC45X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN48610BUC45X requirements.
6.How does Aetrix verify that FAN48610BUC45X is sourced from the original manufacturer or authorized distributors?
All FAN48610BUC45X 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 FAN48610BUC45X meets industry standards.
7.What is the process for return or replacement of FAN48610BUC45X?
All FAN48610BUC45X units undergo pre-shipment inspection (PSI). If there is an issue with FAN48610BUC45X, 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 FAN48610BUC45X part is unused and in its original packaging.
Return procedure for FAN48610BUC45X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FAN48610BUC45X Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
