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onsemi FAN53601AUC10X
- Part No.:
- FAN53601AUC10X
- Manufacturer:
- onsemi
- Package:
- 6-UFBGA, WLCSP
- Datasheet:
-
FAN53601AUC10X.pdf
- Description:
- IC REG BUCK 1V 600MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,933
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Product details
Overview
FAN53601AUC10X from onsemi is a 6 MHz, 600 mA synchronous buck regulator delivering a fixed 1.000 V output from 2.3 V–5.5 V input. It features 24 µA quiescent current in PFM mode, internal soft-start, active output discharge, and operates in WLCSP-6 (0.4 mm pitch) for space-constrained mobile power rails.
For engineers reviewing the FAN53601AUC10X datasheet, pinout, applications, or equivalent options, this device supports high-efficiency, low-noise point-of-load conversion in battery-powered portable electronics where compact size, fast transient response, and light-load efficiency are critical.
Technical Context
The FAN53601AUC10X uses a proprietary non-linear fixed-frequency PWM modulator with seamless auto-switching between PWM and PFM modes. Its 6 MHz switching frequency enables ultra-small external components - down to 470 nH inductors and 4.7 µF ceramic output capacitors - while maintaining stable regulation across 1 mA to 600 mA loads.
It integrates synchronous rectification with 175 mΩ PMOS and 165 mΩ NMOS on-resistance, supports external clock synchronization via the MODE pin (1.3–1.7 MHz input), and includes under-voltage lockout (2.27 V threshold), thermal shutdown (150°C), and cycle-by-cycle over-current protection with hiccup-mode restart.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.000 V ±4.7% (0–600 mA load, -40°C to +85°C) |
| Max Output Current | 600 mA continuous; peak current limit 900–1250 mA (open-loop) |
| Switching Frequency | 6.0 MHz nominal (±10%); synchronizable to 1.3–1.7 MHz external clock ×4 |
| Quiescent Current | 24 µA typical in PFM mode; <1 µA in shutdown |
| Input Voltage Range | 2.3 V to 5.5 V; UVLO rising threshold 2.27 V with 200 mV hysteresis |
| Efficiency | Peak 92% at mid-load; >80% maintained down to 1 mA load |
| Package | WLCSP-6, 0.4 mm pitch, 1.16 mm × 0.86 mm footprint, 586 µm typical height |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP-6), 0.4 mm pitch, bumps facing down in standard mounting. Dimensions: 1.160 mm × 0.860 mm × 0.586 mm (typ). Requires NSMD land pattern per Figure 36 in datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Configures operation mode: logic HIGH forces PWM; logic LOW enables auto PFM/PWM switching; also accepts sync clock (×4 multiplication) |
| B1 | SW | Switching node - connects directly to inductor; carries high di/dt pulsed current; requires low-inductance layout |
| C1 | FB | Feedback input - senses regulated output voltage; internally connected to 1.000 V reference; enables active discharge when EN = LOW |
| C2 | GND | Power and signal ground - all references tied here; must be low-impedance, thermally coupled to PCB copper pour |
| B2 | EN | Enable control - active HIGH (>1.2 V); shutdown draws <1 µA; internal pull-down prevents floating |
| A2 | VIN | Main input supply - accepts 2.3–5.5 V; requires local 2.2 µF ceramic capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 24 µA typical in PFM mode preserves battery life in always-on subsystems without sacrificing transient response |
| 6 MHz fixed-frequency operation | Enables use of sub-500 nH inductors and 4.7 µF ceramic capacitors - reduces solution size by >40% vs. 1–2 MHz converters |
| Internal soft-start | Controlled 180–300 µs ramp with exponential reference prevents inrush current and output overshoot during startup |
| Active output discharge | 230 Ω internal path discharges FB to GND when EN = LOW - ensures clean power-down sequencing in multi-rail systems |
| Best-in-class load transient response | Maintains <±2% output deviation during 10–200–10 mA load steps (100 ns edge), critical for CPU/GPU core rail stability |
Applications
| Mobile Baseband Power | Wi-Fi/Bluetooth SoC Core Rail |
|---|---|
|
Use Scenario: Powers baseband processor core in LTE/4G data cards requiring tight voltage tolerance and rapid load changes during burst transmission. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 1.000 V at up to 600 mA with <300 µs soft-start and hiccup-mode fault recovery. Use Value: 92% peak efficiency and 24 µA quiescent current extend battery runtime; 6 MHz switching minimizes EMI in RF-sensitive layouts. |
Use Scenario: Supplies core voltage to dual-band Wi-Fi 5/6 and Bluetooth 5.0 SoCs in tablets and netbooks with dynamic DVFS scaling. IC Role / Device Role / Timing Role: Fixed-output buck converter supporting PFM/PWM auto-transition to maintain regulation across 1 mA idle to 600 mA TX peaks. Use Value: Seamless mode switching eliminates audible noise; active discharge ensures safe power-down before RF reset sequences. |
| DSC/DVC Image Sensor Bias | Ultra-Mobile PC Memory I/O Rail |
|
Use Scenario: Provides clean, low-noise 1.000 V bias to CMOS image sensor analog front-end in digital still/video cameras. IC Role / Device Role / Timing Role: Low-ripple PFM mode (<15 mVpp ripple at 100 mA) with PSRR >60 dB at 100 kHz suppresses switching noise coupling into analog pixel signals. Use Value: Internal synchronous MOSFETs eliminate external diode losses; 0.4 mm pitch WLCSP fits beneath sensor modules with minimal board area. |
Use Scenario: Generates memory I/O voltage (e.g., LPDDR4 VDDQ) in fanless ultra-mobile PCs where thermal headroom is constrained. IC Role / Device Role / Timing Role: High-efficiency buck regulator operating at 6 MHz to avoid interference with DDR timing margins and reduce inductor heat dissipation. Use Value: 125 °C/W θJA enables full 600 mA output at +85°C ambient without derating; thermal shutdown protects against sustained overload. |
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 | Fixed 1.0 V output, 600 mA, 3.5 MHz switching, 22 µA IQ, no MODE pin sync capability | Lacks external clock synchronization and active output discharge; lower switching frequency increases inductor size | Choose if system lacks clock sync requirement and board space allows larger passive components |
| RT8059GJ6 | Adjustable 0.6–3.3 V output, 600 mA, 6 MHz, 25 µA IQ, no integrated discharge path | Requires external feedback resistors; no built-in discharge resistor - needs external MOSFET circuit for safe discharge | Prefer when output voltage flexibility is needed and discharge can be implemented externally |
Compared with TPS62231DRVR and RT8059GJ6, the FAN53601AUC10X uniquely combines fixed 1.000 V accuracy, MODE-pin clock sync, and integrated 230 Ω discharge in a 0.4 mm pitch WLCSP - enabling smaller, more robust, and timing-synchronized power solutions for high-density mobile designs.
Availability
FAN53601AUC10X is available at Aetrix Electronics and suitable for mobile baseband, Wi-Fi SoC, image sensor, and ultra-mobile PC power applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for FAN53601AUC10X 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 power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and mobile markets.
The FAN53601AUC10X belongs to onsemi's high-frequency synchronous buck regulator product line, engineered specifically for ultra-compact, high-efficiency point-of-load conversion in battery-powered portable electronics with stringent size and thermal constraints.
FAQ
What is the output voltage tolerance of the FAN53601AUC10X over temperature and load?
The FAN53601AUC10X delivers a fixed 1.000 V output with ±4.7% accuracy (0.953 V to 1.048 V) across 0–600 mA load and -40°C to +85°C ambient temperature. In PWM mode only, tolerance tightens to ±3.3% (0.967 V to 1.034 V). This is confirmed in the Electrical Characteristics table under VO parameter for the FAN53601AUC10X variant.
Does the FAN53601AUC10X support external clock synchronization, and what is the required input frequency range?
Yes, the FAN53601AUC10X supports external clock synchronization via its MODE pin. When a square wave is applied to MODE, the device locks its 6 MHz switching frequency to four times the input frequency - requiring an input range of 1.3 MHz to 1.7 MHz. This is specified in the Electrical Characteristics table under fSYNC parameter.
How does the active output discharge function work on the FAN53601AUC10X, and what is its resistance value?
When the EN pin is driven LOW, the FAN53601AUC10X activates an internal 230 Ω discharge path between FB and GND to actively pull down the output voltage. This ensures controlled power-down sequencing in multi-rail systems. The value is measured and specified in the Electrical Characteristics table under RDIS parameter.
What is the minimum recommended output capacitor for stable operation of the FAN53601AUC10X?
The FAN53601AUC10X is designed for stable operation with a minimum 4.7 µF X5R ceramic capacitor in 0402 case size. The datasheet confirms stability down to 1.6 µF (min) and up to 12.0 µF (max), with higher values improving transient response and reducing ripple - no additional compensation is required.
Can the FAN53601AUC10X operate with an input voltage below 2.3 V, and what happens near the UVLO threshold?
No - the FAN53601AUC10X has a guaranteed operating input range of 2.3 V to 5.5 V. Its under-voltage lockout (UVLO) rising threshold is 2.27 V ±0.12 V, with 200 mV hysteresis. Below 2.15 V, the device remains disabled; operation below 2.3 V is outside recommended conditions and may result in unstable regulation or failure to start.
FAN53601AUC10X 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):
- 1V
- 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 (1.23x0.88)
FAN53601AUC10X FAQ
1.How can I place an order for FAN53601AUC10X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN53601AUC10X 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 FAN53601AUC10X reliable?
The price and inventory of FAN53601AUC10X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN53601AUC10X is usually 5 days.
3.What payment methods are accepted for FAN53601AUC10X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN53601AUC10X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN53601AUC10X?
FAN53601AUC10X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN53601AUC10X 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 FAN53601AUC10X?
For technical support, including FAN53601AUC10X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN53601AUC10X requirements.
6.How does Aetrix verify that FAN53601AUC10X is sourced from the original manufacturer or authorized distributors?
All FAN53601AUC10X 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 FAN53601AUC10X meets industry standards.
7.What is the process for return or replacement of FAN53601AUC10X?
All FAN53601AUC10X units undergo pre-shipment inspection (PSI). If there is an issue with FAN53601AUC10X, 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 FAN53601AUC10X part is unused and in its original packaging.
Return procedure for FAN53601AUC10X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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