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onsemi FAN2360MPX
- Part No.:
- FAN2360MPX
- Manufacturer:
- onsemi
- Package:
- 34-PowerTFQFN
- Datasheet:
-
FAN2360MPX.pdf
- Description:
- IC REG BUCK ADJ 10A 34PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,016
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Product details
Overview
FAN2360MPX from ON Semiconductor (formerly Fairchild) is a 10 A synchronous buck regulator IC designed for high-efficiency DC-DC conversion in power management subsystems. It operates from 4.5 V to 24 V input, delivers 0.6–5.5 V output with ±1% reference accuracy, supports programmable 200 kHz–1.5 MHz switching frequency, and integrates PFM mode for light-load efficiency - used in notebook CPU core voltage regulation.
For engineers reviewing the FAN2360MPX datasheet, pinout, applications, or equivalent options, key selection considerations include its constant on-time control architecture, valley-current limiting via ILIM pin, thermal shutdown with 155°C trip point, and 34-lead PQFN (5.5 mm × 5.0 mm) package with multi-PVIN/SW/PGND pads for low-impedance power delivery.
Technical Context
The FAN2360MPX employs Fairchild's constant on-time (COT) modulation with VIN feed-forward, enabling fixed-frequency operation in CCM and variable-frequency PFM in DCM - ensuring excellent line/load transient response without loop compensation. Its modulator uses internal 2.2 pF capacitor and frequency-setting resistor (RFREQ) to generate tON proportional to VOUT/VIN.
Protection logic includes dual-level over-voltage detection (108–115% and 118–125% of VREF), under-voltage lockout on VCC (4.4 V turn-on with 160 mV hysteresis), valley-current limiting via ILIM pin with ±10% accuracy at 12 A, and thermal shutdown with 15°C hysteresis (155°C off, 140°C restart).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5 V to 24 V - supports wide-input industrial and computing rails including 12 V and 19 V adapter inputs. |
| Continuous Output Current | 10 A - rated for sustained load in CPU/GPU core supplies without derating at TJ ≤ 125°C on 4-layer PCB. |
| Output Voltage Accuracy | ±1% over temperature - ensures tight regulation for sensitive digital loads like SoCs and FPGAs. |
| Switching Frequency Range | 200 kHz to 1.5 MHz - programmable via resistor on FREQ pin; enables EMI optimization and inductor size trade-offs. |
| Efficiency Peak | Over 96% - achieved at mid-load with 12 V input/1.2 V output, reducing thermal load in space-constrained notebooks. |
| Soft-Start Time | Programmable (e.g., 1 ms with 15 nF CSS) - prevents inrush current and enables controlled power-up sequencing. |
| Thermal Resistance θJA | 35 °C/W - measured on 7 cm × 7 cm, 4-layer PCB with 1 oz copper; informs heatsink/no-airflow design margin. |
Pinout & Package
Package: 34-lead PQFN, 5.5 mm × 5.0 mm, exposed thermal pad (P1 = AGND, P2 = PVIN, P3 = SW). High-current paths use multiple parallel pins: 7× PVIN, 12× SW, 4× PGND, 2× PVCC, 2× AGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (Pins 5–11, P2) | Power input for high-side MOSFET and power stage | Low-inductance connection point for bulk input capacitors; multiple pins reduce IR drop and thermal stress. |
| SW (Pins 2, 12–17, 22, P3) | Switching node between HS and LS MOSFETs | High-dI/dt node requiring short, wide traces; 12 parallel pins minimize parasitic inductance for clean switching. |
| PGND (Pins 18–21) | Power ground return for LS MOSFET and gate driver | Direct path for high-frequency return current; isolated from AGND to prevent noise coupling into analog circuitry. |
| AGND (Pins 4, 23, P1) | Analog ground reference for FB, EN, SS, FREQ, ILIM | Star-ground point for precision feedback and control signals; must be connected to thermal pad for optimal noise immunity. |
| FB (Pin 27) | Output voltage feedback input | Connects to resistor divider; 596 mV nominal trip point enables accurate 0.6–5.5 V output programming. |
| ILIM (Pin 24) | Valley current limit set-point | Resistor-to-SW sets threshold; ±10% accuracy at 12 A enables reliable over-current protection without external sense resistor. |
| BOOT (Pin 3) | High-side gate driver supply | Requires 0.1 µF ceramic capacitor to SW; internal boot diode eliminates external component count. |
| EN (Pin 29) | Enable/disable control input | TTL-compatible (0.8 V/2.0 V thresholds); 10 µA shutdown current supports battery-backed systems. |
Key Features
| Feature | Design Value |
|---|---|
| Constant on-time (COT) control with VIN feed-forward | Enables stable operation across 4.5–24 V input without external compensation components. |
| PFM mode with ultrasonic minimum frequency clamp | Maintains >18 kHz switching at light load to avoid audible noise while maximizing efficiency down to µA loads. |
| Dual-level over-voltage protection (OVP) | First level (108–115% VREF) disables both MOSFETs; second level (118–125% VREF) forces LS on until power cycle - protects downstream ICs from catastrophic failure. |
| Programmable soft-start with overload recovery | SS clamp drops from 400 mV to 40 mV during overload, enabling automatic recovery once fault clears. |
| Integrated boot diode and thermal shutdown with hysteresis | Eliminates external diode; 15°C hysteresis (155°C off / 140°C restart) prevents thermal oscillation in high-power density layouts. |
Applications
| Server VR12 Core Regulator | Notebook CPU Core Supply |
|---|---|
Use Scenario: Provides dynamic 0.7–1.3 V core voltage to Intel/AMD server CPUs with rapid load transients up to 10 A/µs. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing power state transitions (C-states) and DVFS scaling. Use Value: Constant on-time architecture delivers <100 µs load-step response; PFM mode maintains >85% efficiency at 100 mA idle current. |
Use Scenario: Powers mobile processor cores in thin-and-light notebooks with 12 V or 19 V adapter input. IC Role / Device Role / Timing Role: Main system PMIC buck stage delivering tightly regulated VDDQ/VDDIO with pre-bias startup capability. Use Value: Startup on pre-biased output prevents output discharge; 34-lead PQFN package enables compact layout with low thermal resistance (35 °C/W). |
| Telecom Baseband Power | Industrial FPGA I/O Bank Supply |
Use Scenario: Supplies 1.8 V or 2.5 V to LTE/5G baseband processors in fanless outdoor cabinets. IC Role / Device Role / Timing Role: High-reliability DC-DC converter operating continuously at -40°C to +125°C junction temperature. Use Value: Thermal shutdown with 15°C hysteresis prevents latch-up; RoHS-compliant halogen-free package meets telecom environmental standards. |
Use Scenario: Powers configurable I/O banks on Xilinx/Intel FPGAs requiring precise 1.2–3.3 V outputs with fast transient response. IC Role / Device Role / Timing Role: Programmable buck regulator supporting multiple voltage domains via FB resistor networks. Use Value: 0.6–5.5 V output range and ±1% reference accuracy ensure signal integrity; PGOOD flag synchronizes FPGA configuration sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | 6 A rated, 4.5–26 V input, fixed 500 kHz frequency, no PFM mode, smaller 8-pin SOIC-EP package | Suitable for lower-current, cost-sensitive designs where light-load efficiency is secondary | Select when board space is constrained and peak load ≤6 A; not drop-in due to different pinout and lack of frequency programming. |
| TPS546B24ARVFT | 15 A rated, 4–18 V input, PMBus interface, integrated MOSFETs, 3.5 mm × 4.5 mm QFN | Targeted at digitally controlled power systems requiring telemetry and dynamic voltage scaling | Choose for systems needing real-time current/voltage monitoring; requires firmware integration and differs in control architecture (current-mode vs COT). |
Compared with MP2315DJ-LF-Z and TPS546B24ARVFT, the FAN2360MPX offers higher current capacity (10 A), programmable frequency for EMI tuning, and PFM mode for ultra-low quiescent current - making it optimal for thermally demanding, analog-controlled computing power rails where flexibility and efficiency across load range are critical.
Availability
FAN2360MPX is available at Aetrix Electronics and suitable for server VR12 core regulators, notebook CPU core supplies, and telecom base station power modules requiring stable component supply across extended temperature ranges (-40°C to +125°C).
Supply support for FAN2360MPX 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 (formerly Fairchild Semiconductor) is a global semiconductor supplier specializing in power management, analog, sensor, and discrete devices for automotive, industrial, and computing markets.
The FAN2360MPX belongs to ON Semiconductor's high-current synchronous buck regulator product line, engineered specifically for high-efficiency, high-transient-response power delivery in mainstream computing platforms including notebooks, servers, and game consoles.
FAQ
What is the maximum continuous output current rating for the FAN2360MPX?
The FAN2360MPX is rated for 10 A continuous output current under recommended operating conditions (TJ ≤ 125°C on a 4-layer PCB with 1 oz copper). This rating is validated per the datasheet's Recommended Operating Conditions table and confirmed by thermal characterization (θJA = 35 °C/W). The FAN2360MPX achieves this with integrated high-side/low-side drivers and multi-pin power routing in its 34-lead PQFN package.
Does the FAN2360MPX support startup on a pre-biased output voltage?
Yes, the FAN2360MPX supports startup on a pre-biased output. During pre-bias startup, the low-side MOSFET is disabled until the first positive PWM edge, preventing reverse current flow that could discharge the output. The device also forces PFM mode during soft-start to maintain positive inductor current - a feature explicitly documented in the "Startup on Pre-Bias" section of the FAN2360MPX datasheet Rev. 1.9.
How is the switching frequency programmed on the FAN2360MPX?
The switching frequency of the FAN2360MPX is programmed using an external resistor connected between the FREQ pin (Pin 32) and AGND. The resistor value sets the on-time (tON) generator current, enabling adjustment across 200 kHz to 1.5 MHz. For example, a 56.2 kΩ resistor yields ~500 kHz operation. The FREQ pin also includes open-circuit detection - if left floating, switching is disabled to prevent uncontrolled on-time.
What protection features are integrated into the FAN2360MPX?
The FAN2360MPX integrates over-current protection (valley-current limiting via ILIM pin), dual-level over-voltage protection (108–115% and 118–125% of VREF), under-voltage protection (86–92% of VREF), thermal shutdown (155°C trip with 15°C hysteresis), and PGOOD fault indication. These protections are implemented in hardware with dedicated comparators and latches - no firmware or external supervision required.
Is the FAN2360MPX pin-compatible with other members of the FAN23xx family?
No, the FAN2360MPX is not pin-compatible with other FAN23xx variants such as FAN2356 or FAN2348. While sharing the same 34-lead PQFN package footprint, pin assignments differ significantly - for example, FAN2356 uses different FB reference voltage (600 mV vs 596 mV) and lacks PGOOD, and its ILIM functionality is implemented differently. Substitution requires full schematic and layout review per each device's datasheet.
FAN2360MPX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- TinyBuck®
- Package/Case:
- 34-PowerTFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 10A
- Frequency - Switching:
- 200kHz ~ 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 34-PQFN (5.5x5)
FAN2360MPX FAQ
1.How can I place an order for FAN2360MPX through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN2360MPX 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 FAN2360MPX reliable?
The price and inventory of FAN2360MPX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN2360MPX is usually 5 days.
3.What payment methods are accepted for FAN2360MPX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN2360MPX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN2360MPX?
FAN2360MPX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN2360MPX 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 FAN2360MPX?
For technical support, including FAN2360MPX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN2360MPX requirements.
6.How does Aetrix verify that FAN2360MPX is sourced from the original manufacturer or authorized distributors?
All FAN2360MPX 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 FAN2360MPX meets industry standards.
7.What is the process for return or replacement of FAN2360MPX?
All FAN2360MPX units undergo pre-shipment inspection (PSI). If there is an issue with FAN2360MPX, 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 FAN2360MPX part is unused and in its original packaging.
Return procedure for FAN2360MPX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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