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onsemi FAN5362UC29X
- Part No.:
- FAN5362UC29X
- Manufacturer:
- onsemi
- Package:
- 6-UFBGA, WLCSP
- Datasheet:
-
FAN5362UC29X.pdf
- Description:
- IC REG BUCK 2.9V 500MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,660
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Product details
Overview
FAN5362UC29X from ON Semiconductor is a 2.9V fixed-output, 500mA synchronous buck regulator operating at 3MHz switching frequency with 45µA quiescent current and 2.7V–5.5V input range. It delivers peak efficiency of 96% and supports seamless 100% duty-cycle operation for low-dropout regulation in space-constrained mobile power rails.
For engineers reviewing the FAN5362UC29X datasheet, pinout, applications, or equivalent options, key selection criteria include its WLCSP-6 package footprint, PFM/PWM mode control via MODE pin, ±3% output voltage accuracy at 500mA load, thermal shutdown at 150°C, and compatibility with 1µH inductors and 4.7µF ceramic output capacitors.
Technical Context
The FAN5362UC29X employs a proprietary non-linear fixed-frequency PWM modulator that maintains 3MHz operation across wide VIN and ILOAD ranges while enabling fast load transient response independent of output capacitor ESR. Its synchronous rectification architecture uses integrated PMOS/NMOS switches with 330mΩ/300mΩ RDS(on) to achieve high efficiency down to 1mA load.
Operation includes automatic PFM mode below ~100mA for ultra-low quiescent current (45µA), forced PWM mode via MODE pin, and smooth transitions between PWM, PFM, and 100% duty cycle-enabling stable regulation even as VIN approaches VOUT = 2.9V. Input UVLO triggers at 2.6V with 175mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9V ±3% at 0–500mA load; ensures precise rail generation for RF transceivers and memory interfaces. |
| Switching Frequency | 3.0MHz nominal; enables use of compact 1µH inductor and 4.7µF ceramic output capacitor. |
| Quiescent Current | 45µA typical in PFM mode; extends battery life in always-on mobile subsystems. |
| Input Voltage Range | 2.7V to 5.5V; supports direct connection to single-cell Li-ion (3.0–4.2V) or dual-cell alkaline supplies. |
| Peak Efficiency | 96% at full load; minimizes thermal dissipation in thermally constrained handheld PCBs. |
| Thermal Shutdown | Activates at 150°C with 20°C hysteresis; protects die during sustained overload or poor heatsinking. |
| Current Limit | 800–1150mA peak PMOS limit; provides robust short-circuit protection without external sensing. |
Pinout & Package
Package: 6-bump Wafer-Level Chip-Scale Package (WLCSP), 0.4mm pitch, 2×3 array, 547–625µm height, bottom-side solder bumps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Configures PFM auto-switching (LOW) or forced PWM (HIGH); also accepts external sync clock at 1.5MHz. |
| B1 | SW | Switching node connecting internal high-side PMOS and low-side NMOS to external inductor. |
| C1 | FB | Feedback input tied directly to VOUT; no external resistor divider required for fixed 2.9V output. |
| C2 | GND | Power and signal ground reference; must be connected to low-impedance PCB plane under IC. |
| B2 | EN | Enable input with 1.2V threshold; pulls FB to GND during shutdown to discharge output capacitance. |
| A2 | VIN | Main input supply (2.7–5.5V); requires local 2.2µF ceramic decoupling capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless 100% duty cycle | Enables dropout operation when VIN drops to ≤2.9V + VDROPOUT (≈150mV at 500mA), avoiding brownout in battery sag conditions. |
| Best-in-class load transient response | Delivers <18mV output glitch during PWM↔PFM transitions and rapid recovery from 0→500mA load steps. |
| Internal soft-start | Exponential ramp limits inrush current; prevents current-limit shutdown during startup into pre-charged loads. |
| Forced PWM and sync capability | Disables PFM noise for EMI-sensitive applications and allows synchronization to system clock to avoid beat frequencies. |
| Ultra-thin WLCSP packaging | 0.625mm × 0.960mm footprint with 586µm height enables integration beneath displays or in stacked-die modules. |
Applications
| SD Flash Memory Power Supply | RF Transceiver Power |
|---|---|
Use Scenario: Powers NAND flash interface logic and I/O buffers in smartphones and tablets during active read/write cycles. IC Role / Device Role / Timing Role: Primary 2.9V LDO-replacement DC/DC regulator delivering clean, regulated power with minimal ripple. Use Value: 96% peak efficiency reduces heat generation near flash packages, while 3MHz switching avoids interference with flash timing margins. | Use Scenario: Supplies bias voltage to LTE/WiFi RF front-end modules requiring stable 2.9V with low noise and fast dynamic response. IC Role / Device Role / Timing Role: Dedicated point-of-load regulator with PFM disabled to eliminate switching noise in sensitive analog RF paths. Use Value: Forced PWM mode eliminates PFM frequency variation, ensuring predictable EMI profile and preventing desense in adjacent receivers. |
| Smartphone Application Processor Core Rail | Mobile Camera Module Power |
Use Scenario: Provides auxiliary 2.9V supply for application processor subsystems such as GPU voltage tracking or display interface logic. IC Role / Device Role / Timing Role: Secondary buck regulator supporting dynamic voltage scaling alongside main core rail. Use Value: 45µA quiescent current extends standby time; 100% duty cycle operation sustains regulation during deep discharge of Li-ion battery. | Use Scenario: Powers image sensor analog front-end and autofocus motor drivers in smartphone rear cameras. IC Role / Device Role / Timing Role: Low-noise, fast-transient regulator responding to burst-mode sensor activation and LED flash pulses. Use Value: Best-in-class load transient response prevents image corruption during rapid sensor wake-up; WLCSP footprint saves board area near camera module. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 2.9V fixed output, 600mA rating, 3.6MHz switching, 22µA IQ, 1.8–6.5V input range. | Higher switching frequency enables smaller inductors but increases EMI risk in noise-sensitive RF sections. | Select when lower IQ and wider VIN range outweigh need for seamless 100% duty cycle operation. |
| RT8059GJ6 | 2.9V fixed output, 500mA rating, 3MHz switching, 40µA IQ, 2.5–5.5V input, WLCSP-6 package. | Lacks external clock sync and has no MODE pin for PWM forcing; thermal shutdown at 145°C. | Choose for cost-sensitive designs where sync capability and extended thermal margin are not required. |
Compared with TPS62231DRVR and RT8059GJ6, the FAN5362UC29X uniquely combines 100% duty cycle support, external sync capability, and best-in-class transient response-making it optimal for battery-powered systems demanding both efficiency and regulation stability during voltage sag.
Availability
FAN5362UC29X is available at Aetrix Electronics and suitable for smartphone power management, RF transceiver biasing, and SD flash memory supply applications requiring stable component supply, long-term lifecycle support, and consistent WLCSP-6 packaging.
Supply support for FAN5362UC29X 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 manufacturer specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and portable electronics.
The FAN5362UC29X belongs to ON Semiconductor's high-frequency synchronous buck regulator product line, designed specifically for space- and efficiency-critical mobile applications including smartphones, tablets, and wireless data cards.
FAQ
What is the maximum output current supported by the FAN5362UC29X?
The FAN5362UC29X supports a continuous output current of 500mA at its fixed 2.9V output. This rating assumes proper thermal management using the WLCSP-6 package on a 4-layer PCB per JEDEC JESD51, with junction temperature maintained below 125°C. Peak current limit is 800–1150mA depending on input voltage and temperature.
Does the FAN5362UC29X require external feedback resistors to set the output voltage?
No, the FAN5362UC29X does not require external feedback resistors. It is a fixed-output device with an internally trimmed 2.9V regulator, and the FB pin is connected directly to the output capacitor. The part number suffix "UC29X" explicitly denotes the 2.9V variant, eliminating the need for external resistor networks.
How does the MODE pin function on the FAN5362UC29X?
The MODE pin on the FAN5362UC29X controls operating mode: pulling it LOW enables automatic PFM/PWM transition for light-load efficiency, while pulling it HIGH forces continuous PWM operation to suppress frequency variation. When toggled with a square wave, it synchronizes the FAN5362UC29X to four times the input frequency, supporting system-level clock alignment.
What package type is used for the FAN5362UC29X?
The FAN5362UC29X uses a 6-bump Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch, 2×3 bump array, and dimensions of 0.625mm × 0.960mm. Its height is 586µm ±39µm, making it suitable for ultra-thin mobile devices. The package features bottom-side solder bumps and requires NSMD land pattern per Fairchild drawing UC006ACrev4.
Can the FAN5362UC29X operate with input voltage below the output voltage?
Yes, the FAN5362UC29X supports seamless 100% duty cycle operation when input voltage drops to or below the 2.9V output level. In this mode, it functions as a low-dropout linear regulator with dropout voltage determined by PMOS RDS(on) and inductor DCR-typically ≈150mV at 500mA-allowing continued regulation during battery voltage sag.
FAN5362UC29X 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):
- 3.1V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.9V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- 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)
FAN5362UC29X FAQ
1.How can I place an order for FAN5362UC29X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN5362UC29X 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 FAN5362UC29X reliable?
The price and inventory of FAN5362UC29X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN5362UC29X is usually 5 days.
3.What payment methods are accepted for FAN5362UC29X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN5362UC29X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN5362UC29X?
FAN5362UC29X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN5362UC29X 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 FAN5362UC29X?
For technical support, including FAN5362UC29X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN5362UC29X requirements.
6.How does Aetrix verify that FAN5362UC29X is sourced from the original manufacturer or authorized distributors?
All FAN5362UC29X 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 FAN5362UC29X meets industry standards.
7.What is the process for return or replacement of FAN5362UC29X?
All FAN5362UC29X units undergo pre-shipment inspection (PSI). If there is an issue with FAN5362UC29X, 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 FAN5362UC29X part is unused and in its original packaging.
Return procedure for FAN5362UC29X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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