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onsemi FAN53601AUC30X
- Part No.:
- FAN53601AUC30X
- Manufacturer:
- onsemi
- Package:
- 6-UFBGA, WLCSP
- Datasheet:
-
FAN53601AUC30X.pdf
- Description:
- IC REG BUCK 3V 600MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,745
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Product details
Overview
FAN53601AUC30X from onsemi is a 6 MHz, 600 mA synchronous buck regulator in WLCSP-6 package delivering fixed 3.0 V output from 2.3–5.5 V input; features 24 µA quiescent current, internal soft-start, UVLO, thermal shutdown, and optional active output discharge-designed for power management in space-constrained portable electronics.
For engineers reviewing the FAN53601AUC30X datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The FAN53601AUC30X employs a proprietary non-linear fixed-frequency PWM modulator with synchronous rectification, enabling 92% peak efficiency and stable 6 MHz operation across 2.3–5.5 V input and 0–600 mA load. Its architecture supports seamless auto-transition between PFM (24 µA IQ) and PWM modes, independent of output capacitor ESR.
It integrates internal soft-start (300 µs typical), input UVLO (2.27 V threshold, 200 mV hysteresis), thermal shutdown (150°C trip, 15°C hysteresis), and over-current protection with hiccup-mode restart. The MODE pin enables forced PWM, external clock synchronization (1.3–1.7 MHz input → 5.2–6.8 MHz sync), or automatic PFM/PWM mode selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.000 V ±4.7% (0–600 mA load, PWM mode) |
| Max Output Current | 600 mA continuous - defines maximum sustained load without thermal derating or current-limit foldback |
| Switching Frequency | 6.0 MHz nominal - enables ultra-small 470 nH inductor and 4.7 µF ceramic output capacitor |
| Quiescent Current | 24 µA typical in PFM mode - sustains >80% efficiency down to 1 mA load for battery longevity |
| Input Voltage Range | 2.3 V to 5.5 V - compatible with single-cell Li-ion (3.0–4.2 V), USB 5 V, and 3.3 V rail inputs |
| Package | WLCSP-6, 0.4 mm pitch, 1.16 × 0.86 mm footprint - optimized for thin mobile PCBs with minimal board area |
| Thermal Shutdown | 150°C junction trip with 15°C hysteresis - protects against sustained overload or poor heatsinking |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP-6), 0.4 mm pitch, 1.16 mm × 0.86 mm body, 547–625 µm height, bumps facing down in standard mounting orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Mode control: logic high forces PWM; logic low enables auto PFM/PWM transition; also accepts sync clock (1.3–1.7 MHz) for 4× frequency multiplication |
| B1 | SW | Switching node: connects directly to inductor; carries high di/dt pulsed current - requires short, low-inductance layout |
| C1 | FB | Feedback input: senses regulated output voltage; internal resistor divider sets 3.0 V - no external resistors needed |
| C2 | GND | Power and signal ground: primary return path for SW, VIN, and FB - must connect to solid ground plane under IC |
| B2 | EN | Enable input: active-high (≥1.2 V); <0.4 V disables regulator and drops supply current to ≤1 µA |
| A2 | VIN | Input power supply: accepts 2.3–5.5 V; requires local 2.2 µF ceramic capacitor placed within 2 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Low-Ripple Light-Load PFM Mode | 24 µA IQ with <15 mVpp output ripple at 10 mA - eliminates audible noise while preserving transient response |
| Forced PWM & External Sync | MODE pin supports deterministic 6 MHz operation or synchronization to host SoC clock - critical for EMI control in RF-sensitive designs |
| Internal Soft-Start | 300 µs typical ramp time with exponential reference shaping - prevents inrush current and output overshoot into large COUT |
| Active Output Discharge | 230 Ω internal discharge path when EN = LOW - ensures rapid VOUT collapse for sequencing-critical systems (e.g., multi-rail processors) |
| Best-in-Class Load Transient Response | ≤20 mV deviation for 10–200–10 mA step (100 ns edge) - maintains core voltage stability during CPU burst activity |
Applications
| Mobile Baseband Power | Wi-Fi/Bluetooth Coexistence |
|---|---|
|
Use Scenario: Powers baseband processor core rail in LTE/5G data cards where input varies from 3.3–4.2 V and load swings from idle (5 mA) to transmit burst (450 mA). IC Role / Device Role / Timing Role: Primary DC-DC converter providing tightly regulated 3.0 V at up to 600 mA with sub-300 µs startup and <25 mV load transient deviation. Use Value: Enables use of compact 470 nH inductor and 4.7 µF 0402 capacitor - reduces total solution size by >40% vs. 2 MHz alternatives. |
Use Scenario: Supplies 3.0 V to dual-band Wi-Fi + Bluetooth combo module in tablets, requiring low-noise operation near sensitive RF receivers. IC Role / Device Role / Timing Role: Synchronous buck regulator operating in forced PWM mode (via MODE pin) to eliminate PFM frequency modulation interference. Use Value: 6 MHz switching pushes noise spectrum beyond 2.4 GHz ISM band - avoids desensitization of adjacent 2.45 GHz receivers. |
| Ultra-Mobile PC Core Logic | DSC/DVC Image Sensor Bias |
|
Use Scenario: Powers FPGA or microcontroller I/O bank in netbooks where ambient temperature ranges from –40°C to +85°C and input is shared 3.3 V rail. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator maintaining >85% efficiency from 10 mA to 600 mA across full temperature range. Use Value: 92% peak efficiency and 125°C/W θJA enable full 600 mA load without heatsink - simplifies thermal design in fanless enclosures. |
Use Scenario: Provides clean 3.0 V bias to CMOS image sensor analog front-end in digital still/video cameras, where PSRR >60 dB at 100 kHz is required. IC Role / Device Role / Timing Role: Low-noise DC-DC source with integrated soft-start and UVLO - prevents sensor reset glitches during power-up. Use Value: 70 dB PSRR at 100 kHz (36 mA load) and <15 mVpp ripple suppress noise coupling into analog pixel readout paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 3.0 V fixed, 600 mA, 3.5 MHz, 22 µA IQ, WSON-6 (2.0 × 2.0 mm) | Larger footprint (2.0 × 2.0 mm vs. 1.16 × 0.86 mm); lower switching frequency increases inductor size requirement | Select when board layout allows larger package and 3.5 MHz operation suffices for EMI targets. |
| RT8059ZSP | 3.0 V fixed, 600 mA, 2 MHz, 30 µA IQ, WDFN-6 (2.0 × 2.0 mm) | Half the switching frequency → requires ≥1 µH inductor; higher IQ reduces light-load efficiency | Choose only if cost sensitivity outweighs size and efficiency requirements; not suitable for space-constrained mobile designs. |
Compared with TPS62231DRYR and RT8059ZSP, the FAN53601AUC30X delivers superior power density via its 1.16 × 0.86 mm WLCSP-6 package and 6 MHz operation, enabling smallest possible passive components - critical for modern ultra-thin portable devices where board area is at premium.
Availability
FAN53601AUC30X is available at Aetrix Electronics and suitable for mobile baseband power, Wi-Fi/Bluetooth coexistence, ultra-mobile PC core logic, and DSC/DVC image sensor bias applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for FAN53601AUC30X 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, with leadership in power management, analog, sensors, and connectivity solutions.
The FAN53601AUC30X belongs to onsemi's high-frequency synchronous buck regulator product line, engineered specifically for space- and efficiency-critical portable applications including smartphones, tablets, and wireless data cards.
FAQ
What is the output voltage tolerance of the FAN53601AUC30X under full load?
The FAN53601AUC30X delivers 3.000 V output with ±4.7% accuracy (2.859–3.141 V) across 0–600 mA load in PWM mode at TA = 25°C. At full 600 mA load and 3.6 V input, measured deviation is typically ±1.1% - tighter than datasheet min/max due to closed-loop regulation stability.
Does the FAN53601AUC30X require external feedback resistors?
No. The FAN53601AUC30X has an internally trimmed 3.000 V feedback reference - the FB pin connects directly to the output capacitor without external resistors. This eliminates resistor tolerance errors and saves PCB area versus adjustable regulators.
How does the MODE pin affect FAN53601AUC30X operation in PFM vs. PWM modes?
When MODE is pulled low (<0.4 V), FAN53601AUC30X automatically switches between PFM (light loads, 24 µA IQ) and PWM (moderate/heavy loads, 6 MHz). When MODE is high (>1.2 V), it forces continuous PWM mode - eliminating frequency modulation for EMI-sensitive applications.
What is the minimum input voltage required for the FAN53601AUC30X to maintain 6 MHz operation at 3.0 V output?
The FAN53601AUC30X maintains 6 MHz fixed-frequency PWM operation down to VIN = 2.7 V at 3.0 V output and high load. Below 2.7 V, switching frequency drops due to tOFF(MIN) limitation - confirmed by Figure 34 in the datasheet showing frequency collapse at VIN = 2.3 V.
Is active output discharge enabled by default on the FAN53601AUC30X?
Yes. The "A" in FAN53601AUC30X denotes active discharge capability. When EN is driven low, FAN53601AUC30X engages an internal 230 Ω discharge path from FB to GND, discharging the output capacitor in <1 ms - essential for precise power sequencing in multi-rail systems.
FAN53601AUC30X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLCSP (1.16x0.86)
FAN53601AUC30X FAQ
1.How can I place an order for FAN53601AUC30X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN53601AUC30X 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 FAN53601AUC30X reliable?
The price and inventory of FAN53601AUC30X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN53601AUC30X is usually 5 days.
3.What payment methods are accepted for FAN53601AUC30X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN53601AUC30X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN53601AUC30X?
FAN53601AUC30X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN53601AUC30X 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 FAN53601AUC30X?
For technical support, including FAN53601AUC30X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN53601AUC30X requirements.
6.How does Aetrix verify that FAN53601AUC30X is sourced from the original manufacturer or authorized distributors?
All FAN53601AUC30X 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 FAN53601AUC30X meets industry standards.
7.What is the process for return or replacement of FAN53601AUC30X?
All FAN53601AUC30X units undergo pre-shipment inspection (PSI). If there is an issue with FAN53601AUC30X, 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 FAN53601AUC30X part is unused and in its original packaging.
Return procedure for FAN53601AUC30X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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