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onsemi FAN23SV06MPX
- Part No.:
- FAN23SV06MPX
- Manufacturer:
- onsemi
- Package:
- 34-PowerTFQFN
- Datasheet:
-
FAN23SV06MPX.pdf
- Description:
- IC REG BUCK ADJ 6A 34PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,136
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Product details
Overview
FAN23SV06MPX from ON Semiconductor is a 6 A synchronous buck regulator with constant on-time control architecture, supporting 7–18 V input (or 4.5–5.5 V with internal LDO bypass), 0.6–5.5 V programmable output, and peak efficiency >96%. It delivers stable power to CPU/GPU core rails in servers and notebooks.
For engineers reviewing the FAN23SV06MPX datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed PFM-mode operation with ultrasonic capability, thermal shutdown behavior, and real-world load transient performance data from official Fairchild/ON Semi documentation.
Technical Context
The FAN23SV06MPX implements constant on-time modulation with VIN feed-forward, enabling fixed-frequency operation in CCM and automatic transition to PFM at light loads. Its minimum off-time of 320 ns ensures reliable valley current sensing and prevents multiple pulsing during transients.
It integrates an internal linear regulator (VREG = 4.75–5.25 V) powering PVCC for gate drivers, supports programmable soft-start via external capacitor, and features open-circuit detection on the FREQ pin to disable switching if left floating - preventing infinite on-time faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 7–18 V (with internal LDO bias); 4.5–5.5 V when VIN/PVIN/PVCC tied - enables dual-rail compatibility with 5 V system supplies. |
| Output Current | 6 A continuous - rated for sustained high-current CPU/GPU core rail delivery without derating at TJ ≤ 125°C. |
| Efficiency Peak | >96% - achieved at mid-load under 12 VIN/1.2 VOUT, 500 kHz, confirming low conduction and switching losses. |
| FB Reference | 596 mV ±6 mV - precision reference enabling ±1% output voltage accuracy over temperature and line/load. |
| Switching Frequency | 200 kHz to 1.5 MHz - programmable via resistor on FREQ pin; supports layout-optimized EMI reduction and inductor size trade-offs. |
| Thermal Shutdown | 155°C trip with 15°C hysteresis - protects against sustained overload or poor heatsinking; auto-restarts upon cooling. |
| Soft-Start Time | Programmable (e.g., 1 ms with 15 nF capacitor) - prevents inrush current and ensures monotonic VOUT ramp with pre-bias startup support. |
Pinout & Package
34-pin PQFN package (5.5 mm × 5.0 mm, 0.5 mm pitch), thermally enhanced with exposed PGND paddle. Pin assignments validated per Figure 4/5 and Pin Definitions table in Rev. 1.18 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (P2, Pins 5–11) | Power input for high-side/low-side MOSFETs | Primary high-current input path; connects to bulk input capacitors; multiple pins reduce IR drop and thermal stress. |
| SW (P3, Pins 2,12–17,22) | Switching node | Junction of internal HS/LS FETs; requires low-inductance layout to minimize ringing and EMI. |
| BOOT (Pin 3) | High-side gate driver supply | Capacitor from BOOT to SW provides charge for HS FET turn-on; internal diode recharges it from PVCC during freewheeling. |
| FB (Pin 27) | Output voltage feedback | Connects to resistor divider; 596 mV threshold sets VOUT; ±100 nA bias current enables high-impedance divider design. |
| EN (Pin 29) | Enable control input | Logic-compatible (1.26 V threshold); supports UVLO via resistive divider from PVIN; clamp limits current at >4.3 V. |
| FREQ (Pin 32) | Frequency programming | Resistor to AGND sets tON and fSW; open-circuit detection disables switching - critical for robust startup validation. |
| PGOOD (Pin 30) | Open-drain power-good indicator | Asserts after soft-start and VOUT settles within ±11% window; 125 Ω pull-down enables direct MCU monitoring. |
| ILIM (Pin 24) | Valley current limit set-point | Resistor to SW programs current limit; ±10% accuracy at 7 A enables precise OCP tuning without external sense resistor. |
Key Features
| Feature | Design Value |
|---|---|
| PFM with Ultrasonic Mode | Automatically reduces switching frequency below audible range (<20 kHz) at light loads - eliminates coil whine while maintaining >90% efficiency at 100 mA. |
| Constant On-Time Control | Delivers <10 µs load transient response without loop compensation - ideal for dynamic CPU/GPU voltage scaling. |
| Integrated Boot Diode | Eliminates external bootstrap diode; reduces BOM count and PCB area while maintaining >96% peak efficiency. |
| Pre-Bias Startup Support | Enables safe start into existing VOUT voltage without discharging output caps - required for hot-swap and multi-rail sequencing. |
| Thermal Hysteresis | 15°C gap between shutdown (155°C) and restart (140°C) prevents thermal oscillation during sustained overload conditions. |
Applications
| Server Core Voltage Regulation | Notebook CPU Power Delivery |
|---|---|
|
Use Scenario: Regulating 1.2 V core supply for dual-socket Xeon servers under dynamic 0–6 A load steps. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-efficiency, low-noise DC/DC conversion with fast transient response. Use Value: Maintains ±1% output accuracy across -40 to 125°C while delivering >96% efficiency at full load - reducing thermal load on server VRMs. |
Use Scenario: Providing adaptive 0.8–1.35 V GPU core rail in ultrabook platforms with strict acoustic noise limits. IC Role / Device Role / Timing Role: Buck regulator operating in ultrasonic PFM mode below 20 kHz to eliminate audible coil whine during idle/light-load states. Use Value: Enables silent operation during video playback or web browsing while sustaining >92% efficiency at 200 mA - extending battery runtime. |
| Telecom Baseband Power | Storage Controller Rail |
|
Use Scenario: Generating clean 3.3 V supply for FPGA-based baseband processors in 5G small cells with bursty traffic patterns. IC Role / Device Role / Timing Role: High-transient-response buck converter handling rapid 0–4 A load changes induced by packet processing bursts. Use Value: Achieves <15 µs recovery time from 50% load step with <25 mV undershoot - preserving signal integrity in high-speed SerDes links. |
Use Scenario: Powering NVMe SSD controller ICs requiring tightly regulated 1.8 V rail with fast wake-from-sleep response. IC Role / Device Role / Timing Role: Enable-controlled buck regulator supporting instant-on functionality via EN pin with programmable soft-start. Use Value: Soft-start time configurable down to 0.5 ms ensures controlled ramp without violating PCIe reset timing - enabling sub-100 ms SSD initialization. |
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 | 4 A rating, fixed 500 kHz fSW, no PFM mode - lacks ultrasonic light-load operation and current-programmable OCP. | Suitable for cost-sensitive, lower-current embedded systems; not recommended for 6 A server/notebook core rails. | Select FAN23SV06MPX when 6 A continuous current, programmable frequency, and ultrasonic PFM are required. |
| RT7290AZSP | 6 A rating, forced PWM only, no PFM - higher light-load quiescent current (1.8 mA vs. FAN23SV06MPX's 16 µA shutdown). | Better for noise-sensitive applications needing fixed-frequency EMI control; unsuitable where acoustic noise or ultra-low idle power matters. | Choose FAN23SV06MPX for applications demanding lowest possible light-load power and silent operation. |
Compared with MP2315DJ-LF-Z and RT7290AZSP, the FAN23SV06MPX uniquely combines 6 A capability, ultrasonic PFM, programmable frequency, and pre-bias startup - making it optimal for high-performance computing power delivery where efficiency, noise, and sequencing reliability are co-constrained.
Availability
FAN23SV06MPX is available at Aetrix Electronics and suitable for server motherboard design, notebook power architecture development, and telecom baseband power supply applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for FAN23SV06MPX 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, and sensor solutions for automotive, industrial, and computing markets.
The FAN23SV06MPX belongs to ON Semiconductor's high-current synchronous buck regulator product line, designed specifically for efficient, low-noise core voltage regulation in servers, notebooks, and telecom infrastructure.
FAQ
What input voltage ranges does the FAN23SV06MPX support?
The FAN23SV06MPX supports two distinct input configurations: 7–18 V using its internal linear regulator for bias, or 4.5–5.5 V when VIN, PVIN, and PVCC are tied together to bypass the LDO. This dual-range capability allows flexible integration into both 12 V server rails and 5 V notebook power architectures - confirmed in the Recommended Operating Conditions table of the FAN23SV06 Rev. 1.18 datasheet.
Does the FAN23SV06MPX support pre-bias startup?
Yes, the FAN23SV06MPX supports safe startup into a pre-biased output voltage without discharging the output capacitor. During soft-start, the low-side MOSFET is disabled until the first positive PWM edge, and the regulator is forced into PFM mode to maintain positive inductor current - explicitly documented in the Operation Description section of the FAN23SV06 Rev. 1.18 datasheet.
How is switching frequency programmed on the FAN23SV06MPX?
Switching frequency is programmed by connecting a resistor between the FREQ pin (Pin 32) and AGND. The value sets the on-time generator current (ItON), determining fSW from 200 kHz to 1.5 MHz. An open-circuit FREQ pin disables switching - a safety feature confirmed in the Functional Block Diagram and Operation Description sections of the FAN23SV06 Rev. 1.18 datasheet.
What protection features are integrated into the FAN23SV06MPX?
The FAN23SV06MPX integrates output over-voltage (two-level: 108–115% and 118–125%), under-voltage (86–92%), over-current (valley current limit with ±10% accuracy), and thermal shutdown (155°C trip with 15°C hysteresis). All protections are hardware-based and latched or auto-recovering as specified in the Electrical Characteristics tables of the FAN23SV06 Rev. 1.18 datasheet.
What is the purpose of the ILIM pin on the FAN23SV06MPX?
The ILIM pin (Pin 24) sets the valley current limit threshold via an external resistor to SW. It enables adjustable over-current protection with ±10% accuracy at 7 A - allowing designers to tune fault response without adding external sense resistors. This function is validated in the Electrical Characteristics table and Pin Definitions section of the FAN23SV06 Rev. 1.18 datasheet.
FAN23SV06MPX 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):
- 7V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6A
- 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)
FAN23SV06MPX FAQ
1.How can I place an order for FAN23SV06MPX through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN23SV06MPX 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 FAN23SV06MPX reliable?
The price and inventory of FAN23SV06MPX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN23SV06MPX is usually 5 days.
3.What payment methods are accepted for FAN23SV06MPX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN23SV06MPX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN23SV06MPX?
FAN23SV06MPX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN23SV06MPX 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 FAN23SV06MPX?
For technical support, including FAN23SV06MPX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN23SV06MPX requirements.
6.How does Aetrix verify that FAN23SV06MPX is sourced from the original manufacturer or authorized distributors?
All FAN23SV06MPX 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 FAN23SV06MPX meets industry standards.
7.What is the process for return or replacement of FAN23SV06MPX?
All FAN23SV06MPX units undergo pre-shipment inspection (PSI). If there is an issue with FAN23SV06MPX, 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 FAN23SV06MPX part is unused and in its original packaging.
Return procedure for FAN23SV06MPX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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