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onsemi FAN53610AUC29X
- Part No.:
- FAN53610AUC29X
- Manufacturer:
- onsemi
- Package:
- 6-UFBGA, WLCSP
- Datasheet:
-
FAN53610AUC29X.pdf
- Description:
- IC REG BUCK 2.9V 1A 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,148
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Product details
Overview
FAN53610AUC29X from ON Semiconductor is a 3 MHz, 1 A synchronous step-down DC-DC regulator in WLCSP-6 package, delivering fixed 2.9 V output from 2.3–5.5 V input. It features 26 µA typical quiescent current, internal soft-start, and selectable PFM/PWM operation via MODE pin-designed for power management in compact portable electronics.
For engineers reviewing the FAN53610AUC29X datasheet, pinout, applications, or equivalent options, key selection criteria include its 1 A output capability at 2.9 V, 3 MHz switching frequency enabling ultra-small 1 µH inductor use, low-noise PFM mode for battery-sensitive designs, and integrated thermal/overcurrent protection.
Technical Context
FAN53610AUC29X employs a proprietary non-linear fixed-frequency PWM modulator with seamless PFM-to-PWM transition, maintaining stable 3 MHz operation across wide VIN (2.3–5.5 V) and load (0–1 A) ranges. Its architecture eliminates ESR dependency, supporting ceramic output capacitors.
The device integrates high-side PMOS (175 mΩ RDS(on)) and low-side NMOS (165 mΩ RDS(on)) synchronous switches, with peak current limiting set to 1.5–2.0 A and thermal shutdown triggered at 150°C (15°C hysteresis). MODE pin enables external clock synchronization up to 1.7 MHz (doubling to 3.4 MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9 V ±3.5% over 0–1 A load and 2.3–5.5 V input-ensures stable core voltage for 2.8–3.0 V logic rails. |
| Max Output Current | 1 A continuous-supports high-efficiency power delivery to application processors or RF modules in mobile devices. |
| Switching Frequency | 3 MHz nominal (2.7–3.3 MHz)-enables use of 1 µH inductors and reduces solution footprint by >40% vs. 1 MHz regulators. |
| Quiescent Current | 26 µA typical in PFM mode-extends battery life in always-on subsystems like GPS or Bluetooth LE receivers. |
| Input Voltage Range | 2.3 V to 5.5 V-compatible with single-cell Li-ion (2.7–4.2 V), USB 5 V, and boosted 3.3 V rails. |
| Efficiency Peak | 97% at 500 mA, 3.6 VIN/2.9 VOUT-minimizes thermal dissipation in thermally constrained WLCSP packages. |
| Thermal Protection | 150°C shutdown with 15°C hysteresis-prevents die damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
Package: WLCSP-6, 0.4 mm pitch, 1.16 mm × 0.86 mm footprint, 586 µm typical height-optimized for space-constrained mobile PCBs with minimal thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Logic-controlled mode select: high = forced PWM (fixed 3 MHz), low = auto PFM/PWM; also accepts sync clock up to 1.7 MHz. |
| B1 | SW | Switch node connecting to external inductor-carries high di/dt; requires tight layout to minimize EMI and voltage spikes. |
| C1 | FB | Feedback input for output regulation-internally connected to 2.9 V reference; no external resistor divider needed. |
| C2 | GND | Power and signal ground reference-must be low-impedance connection to PCB ground plane beneath IC. |
| B2 | EN | Enable input: <0.4 V = shutdown (<1 µA IQ), >1.2 V = active; supports sequencing and system-level power control. |
| A2 | VIN | Main power input (2.3–5.5 V)-requires local 2.2 µF ceramic capacitor placed within 2 mm of pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ PFM mode | 26 µA typical quiescent current enables >100-hour standby in coin-cell-powered IoT sensors. |
| Integrated soft-start | 300 µs typical ramp time prevents inrush current and output overshoot during power-up. |
| Active output discharge | 230 Ω internal discharge path when EN = GND-ensures fast, controlled VOUT decay for system safety and sequencing. |
| Robust protection suite | Includes UVLO (2.27 V threshold), overcurrent limiting (1.75 A typ), and thermal shutdown (150°C). |
| Small-solution optimization | Supports 1 µH inductor and 10 µF ceramic output capacitor-reduces total BOM count and board area vs. legacy 1 MHz designs. |
Applications
| Smartphone Application Processor Core Rail | Wi-Fi/Bluetooth Combo Module Power |
|---|---|
Use Scenario: Powers ARM Cortex-A series CPU cores requiring tightly regulated 2.9 V at up to 1 A during burst processing. IC Role / Device Role / Timing Role: Primary buck regulator providing dynamic voltage scaling (DVS) support with fast transient response to handle 10–800 mA load steps. Use Value: 97% peak efficiency and 3 MHz switching reduce heat generation and enable thinner smartphone chassis without thermal throttling. | Use Scenario: Supplies clean 2.9 V power to dual-band Wi-Fi 5 + Bluetooth 5.0 combo ICs in ultraportable laptops. IC Role / Device Role / Timing Role: Dedicated point-of-load regulator with low-noise PFM mode during idle and forced PWM during data transmission bursts. Use Value: 26 µA IQ extends battery runtime in sleep mode; 3 MHz operation avoids interference with 2.4 GHz ISM band. |
| Portable Medical Sensor Hub | Industrial Handheld Scanner |
Use Scenario: Powers multi-sensor fusion hub (ECG, SpO₂, temperature) in FDA-cleared wearable monitors. IC Role / Device Role / Timing Role: Safety-critical power stage with thermal shutdown and undervoltage lockout ensuring reliable operation under varying battery conditions. Use Value: Active discharge on EN deassertion guarantees rapid power-down for patient safety compliance and data integrity. | Use Scenario: Delivers 2.9 V to barcode imaging engine and UHF RFID reader in ruggedized handheld scanners. IC Role / Device Role / Timing Role: High-reliability DC-DC converter supporting wide input range (2.3–5.5 V) to accommodate both Li-ion and alkaline battery configurations. Use Value: 150°C thermal shutdown protects against overheating in sealed enclosures; WLCSP package withstands mechanical shock per MIL-STD-883. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62260DRVR | 2.25 V–6.5 V input; 2.5 V–6.0 V adjustable output; 600 mA max; 2.25 MHz switching. | Requires external feedback resistors; lacks integrated 2.9 V option and active discharge. | Choose for adjustable-output systems needing wider VIN range and lower cost; not drop-in for fixed 2.9 V designs. |
| RT8059ZSP | 2.5 V–5.5 V input; fixed 2.8 V output; 1 A max; 3 MHz switching; no MODE pin for sync. | Fixed 2.8 V (100 mV lower); no external clock synchronization; no active discharge. | Choose when 2.8 V is acceptable and clock sync is unnecessary; smaller solution size but less flexible control. |
Compared with TPS62260DRVR and RT8059ZSP, FAN53610AUC29X provides exact 2.9 V regulation with integrated active discharge and MODE-pin synchronizability-making it optimal for space-constrained, battery-powered systems requiring precise voltage, fast transient response, and robust sequencing control.
Availability
FAN53610AUC29X is available at Aetrix Electronics and suitable for smartphone power management, portable medical sensor hubs, industrial handheld scanners, and Wi-Fi/Bluetooth combo module applications requiring stable component supply and long-term lifecycle support.
Supply support for FAN53610AUC29X 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
ON Semiconductor is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud computing, and portable electronics markets.
FAN53610AUC29X belongs to the Fairchild-legacy high-frequency buck regulator product line, engineered specifically for ultra-compact, high-efficiency power delivery in battery-powered mobile and IoT devices.
FAQ
What is the output voltage tolerance of FAN53610AUC29X across full load and temperature?
FAN53610AUC29X delivers 2.9 V output with ±3.5% tolerance (2.797–3.003 V) over 0–1 A load and –40°C to +85°C ambient temperature, verified at both 3.8 V and 5.0 V input. This specification ensures compatibility with 2.8–3.0 V logic families without requiring external trimming, and is guaranteed by internal precision feedback circuitry-not dependent on external components.
Does FAN53610AUC29X support external clock synchronization, and what is the valid frequency range?
Yes, FAN53610AUC29X supports external clock synchronization via the MODE pin, accepting square-wave inputs from 1.3 MHz to 1.7 MHz. The internal oscillator locks to twice the MODE pin frequency-enabling synchronized operation at 2.6–3.4 MHz. This feature allows noise-sensitive systems to avoid beat frequencies with other clock domains, and is confirmed in the Electrical Characteristics table under fSYNC parameter.
What is the minimum recommended output capacitance for stable operation of FAN53610AUC29X?
The minimum recommended output capacitance for FAN53610AUC29X is 10 µF ceramic (X5R/X7R, 0603 case), as specified in the Recommended Operating Conditions table. Using less than 10 µF risks degraded transient response and increased output ripple beyond datasheet limits-particularly during 200–800 mA load steps shown in Figure 21. Larger values improve ripple suppression but do not affect loop stability.
How does the active output discharge function operate in FAN53610AUC29X, and what is its resistance value?
FAN53610AUC29X provides active output discharge only when the EN pin is driven low (≤0.4 V). During shutdown, an internal 230 Ω switch connects the FB pin to GND, discharging the output capacitor through the feedback network. This ensures VOUT falls rapidly and predictably-critical for safe power sequencing in multi-rail systems-and is validated in the Electrical Characteristics table under RDIS parameter.
What is the thermal performance of FAN53610AUC29X in standard PCB layouts, and how is junction temperature calculated?
FAN53610AUC29X has a typical θJA of 125°C/W on a 2s2p four-layer JEDEC-standard board. Junction temperature is calculated as TJ = TA + (PDISS × θJA), where PDISS = (VIN − VOUT) × IOUT × (1 − Efficiency). At 1 A, 3.6 VIN/2.9 VOUT, peak dissipation is ~350 mW, yielding TJ ≈ 85°C above ambient-well below the 125°C max operating junction temperature specified in the Recommended Operating Conditions.
FAN53610AUC29X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.9V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLCSP (1.23x0.88)
FAN53610AUC29X FAQ
1.How can I place an order for FAN53610AUC29X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN53610AUC29X 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 FAN53610AUC29X reliable?
The price and inventory of FAN53610AUC29X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN53610AUC29X is usually 5 days.
3.What payment methods are accepted for FAN53610AUC29X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN53610AUC29X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN53610AUC29X?
FAN53610AUC29X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN53610AUC29X 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 FAN53610AUC29X?
For technical support, including FAN53610AUC29X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN53610AUC29X requirements.
6.How does Aetrix verify that FAN53610AUC29X is sourced from the original manufacturer or authorized distributors?
All FAN53610AUC29X 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 FAN53610AUC29X meets industry standards.
7.What is the process for return or replacement of FAN53610AUC29X?
All FAN53610AUC29X units undergo pre-shipment inspection (PSI). If there is an issue with FAN53610AUC29X, 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 FAN53610AUC29X part is unused and in its original packaging.
Return procedure for FAN53610AUC29X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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