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onsemi FAN23SV10MMPX
- Part No.:
- FAN23SV10MMPX
- Manufacturer:
- onsemi
- Package:
- 34-PowerTFQFN
- Datasheet:
-
FAN23SV10MMPX.pdf
- Description:
- IC REG BUCK ADJ 10A 34PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,458
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Product details
Overview
FAN23SV10MMPX from ON Semiconductor is a 10 A synchronous buck regulator with PFM light-load mode and no ultrasonic operation, designed for high-efficiency DC-DC conversion in server and telecom power rails. It supports 7–18 V input (or 4.5–5.5 V bypassed), delivers 0.6–5.5 V output, achieves >96% peak efficiency, and operates across –40°C to +125°C.
For engineers reviewing the FAN23SV10MMPX datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed thermal and transient performance, and two rigorously cross-checked alternative parts for 10 A buck regulation in industrial and computing systems.
Technical Context
The FAN23SV10MMPX employs constant on-time (COT) control with VIN feed-forward to maintain stable switching frequency in CCM and enable seamless transition into PFM mode at light loads. Its modulator uses internal 2.2 pF timing capacitance and programmable RFREQ to set tON between 250 ns (typ.) and scalable values across 200 kHz–1.5 MHz.
It integrates an internal linear bias regulator (VREG = 4.75–5.25 V), dual-level over-voltage protection (108–115% and 118–125% of VREF), valley-current limiting via ILIM resistor programming, and thermal shutdown at 155°C with 15°C hysteresis - all implemented without external loop compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 7–18 V (with internal LDO bias) or 4.5–5.5 V (bypassed via VIN/PVIN/PVCC tie); enables flexible rail selection in multi-rail systems. |
| Output Current | 10 A continuous; supports high-density CPU/GPU core power delivery with thermal derating per θJA = 35°C/W. |
| Switching Frequency | 200 kHz–1.5 MHz, programmable via FREQ pin resistor; allows optimization of size vs. EMI in space-constrained designs. |
| Feedback Accuracy | ±1% over temperature (VFB = 596 mV ±6 mV); ensures tight output regulation under load/line transients. |
| Light-Load Efficiency | PFM mode enabled (no ultrasonic operation); reduces switching losses by lowering fSW proportionally to load current. |
| Protection Features | Valley-current OCP, dual-level OVP (108%/118% VREF), UVP (89% VREF), thermal shutdown (155°C), and PGOOD open-drain flag. |
| Package | 34-lead PQFN, 5.5 mm × 5.0 mm; exposes thermal pad for direct PCB heatsinking and low-inductance power routing. |
Pinout & Package
34-lead PQFN package (5.5 mm × 5.0 mm) with exposed thermal pad; optimized for high-current power delivery and thermal dissipation on 4-layer PCBs (θJA = 35°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (P2, Pins 5–11) | Power input for high-side/low-side MOSFETs | Primary high-current input path; multiple parallel pins reduce IR drop and improve thermal spreading. |
| SW (P3, Pins 2, 12–17, 22) | Switching node | High-dI/dt connection point between HS and LS MOSFETs; requires minimized loop area to suppress EMI. |
| BOOT (Pin 3) | High-side gate driver supply | Charged via internal diode from PVCC during freewheeling; requires 0.1 µF ceramic capacitor to SW. |
| ILIM (Pin 24) | Current limit threshold setting | Resistor from ILIM to SW programs valley-current limit; KILIM = 142, TC = 4000 ppm/°C. |
| FB (Pin 27) | Output voltage feedback | Monitors resistive divider output; reference = 596 mV ±6 mV; supports 0.6–5.5 V output range. |
| EN (Pin 29) | Enable control with UVLO | Rising threshold = 1.26 V ±150 mV; hysteresis = 122 mV; supports external resistor-divider for rail-based startup. |
| FREQ (Pin 32) | On-time and frequency programming | Resistor to AGND sets tON and fSW; open-circuit detection disables switching to prevent runaway. |
| PGOOD (Pin 30) | Power-good status flag | Open-drain output asserting when VOUT is within ±11% of target; pull-up required externally. |
Key Features
| Feature | Design Value |
|---|---|
| Constant on-time (COT) control | Enables fixed-frequency CCM operation and automatic PFM entry without loop compensation or external components. |
| Internal linear bias regulator | Generates 5.05 V ±2.5% PVCC from VIN; eliminates need for external bias rail while supporting 5 V bypass operation. |
| Programmable soft-start | ISS = 10 µA charges external CSS; startup time tSS = CSS × 60 V/s; clamps SS to 400 mV above FB during normal ramp. |
| Dual-level over-voltage protection | First level (108–115% VREF) latches off both MOSFETs; second level (118–125% VREF) forces LS-on until power cycle - prevents catastrophic load damage. |
| Thermal shutdown with hysteresis | Shuts down at TJ = 155°C; restarts at 140°C; prevents thermal runaway in sustained overload or poor airflow conditions. |
Applications
| Server VR12/VR13 Core Power | Telecom Base Station DC-DC |
|---|---|
Use Scenario: Regulating 1.2 V/10 A CPU core supply from 12 V intermediate bus in dual-socket servers. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-current, fast-transient load steps with <100 µs recovery. Use Value: >96% peak efficiency at full load and PFM mode at idle reduce system power loss and thermal load in dense rack environments. |
Use Scenario: Generating 3.3 V/10 A supply for FPGA and DSP subsystems in 48 V-powered telecom equipment. IC Role / Device Role / Timing Role: High-reliability buck regulator with dual-OVP and thermal shutdown protecting sensitive baseband ICs. Use Value: 155°C thermal shutdown and 125°C max operating junction temperature ensure robustness in uncooled outdoor enclosures. |
| Industrial GPU Accelerator Board | Enterprise SSD Controller Rail |
Use Scenario: Delivering 0.85 V/10 A to AI inference accelerators requiring sub-20 mV ripple and monotonic startup. IC Role / Device Role / Timing Role: Precision-regulated buck stage with ±1% FB accuracy and programmable soft-start for ratiometric tracking. Use Value: 596 mV ±6 mV reference and 0.82–2.03 ms PGOOD delay ensure clean power sequencing and reliable firmware boot. |
Use Scenario: Providing 1.8 V/10 A to NAND flash controller ICs in NVMe SSDs with strict EMI and transient requirements. IC Role / Device Role / Timing Role: Low-noise, high-PWM-frequency buck regulator using 1.5 MHz switching to shift noise above audio band. Use Value: No ultrasonic mode eliminates audible coil whine; PFM mode maintains >85% efficiency at 100 mA standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10 A synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | Fixed 500 kHz fSW, no PFM mode, lower IOUT rating (6 A), smaller 8-pin SOIC package. | Lacks light-load efficiency optimization and thermal headroom for sustained 10 A operation. | Select only for cost-sensitive, lower-power applications where 6 A suffices and PFM is unnecessary. |
| TPS54A20RVL | 10 A rating, 2.2 V–18 V VIN, integrated MOSFETs, but requires external compensation and lacks dual-OVP. | No second-level OVP or thermal hysteresis; less fault coverage for mission-critical telecom loads. | Prefer when board space is constrained and integrated FETs justify trade-offs in protection depth. |
Compared with MP2451DT-LF-Z and TPS54A20RVL, the FAN23SV10MMPX uniquely combines 10 A capability, PFM light-load mode, dual-level OVP, and thermal hysteresis in a thermally optimized PQFN - making it the only option among the three qualified for sustained 10 A operation with full fault coverage in server and telecom infrastructure.
Availability
FAN23SV10MMPX is available at Aetrix Electronics and suitable for server VR12/VR13 core power, telecom base station DC-DC, industrial GPU accelerator boards, and enterprise SSD controller rails requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for FAN23SV10MMPX 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 leader in intelligent power and sensing solutions, serving automotive, industrial, cloud computing, and communications markets with energy-efficient semiconductor technologies.
The FAN23SV10MMPX belongs to ON Semiconductor's high-current synchronous buck regulator product line, engineered specifically for high-efficiency, high-reliability DC-DC conversion in datacenter and telecom infrastructure where thermal resilience and comprehensive fault protection are mandatory.
FAQ
What is the maximum continuous output current supported by the FAN23SV10MMPX?
The FAN23SV10MMPX supports 10 A continuous output current under recommended operating conditions (TJ ≤ +125°C, 4-layer PCB, 1 oz copper). At 15 A, operation is limited to short-duration transients per datasheet testing; sustained 10 A requires proper thermal design using the exposed thermal pad and θJA = 35°C/W layout guidance. The FAN23SV10MMPX must not be operated beyond its absolute maximum ratings, including VPVIN ≤ 25 V and TJ ≤ +150°C.
Does the FAN23SV10MMPX support 5 V input operation, and how is it configured?
Yes, the FAN23SV10MMPX supports 4.5–5.5 V input operation by connecting VIN, PVIN, and PVCC together to bypass the internal linear regulator. This configuration eliminates reliance on the internal LDO and allows direct 5 V rail powering - critical for NVDC notebook and low-voltage telecom applications. When used this way, the PVCC pin becomes an input rather than an output, and the 2.2 µF bypass capacitor remains required on PVCC.
How does the PFM mode in the FAN23SV10MMPX improve light-load efficiency?
The FAN23SV10MMPX enters PFM mode automatically when inductor current drops to discontinuous conduction mode, reducing switching frequency proportionally to load current - thereby minimizing gate drive and switching losses. Unlike forced PWM controllers, this behavior is intrinsic to its constant on-time architecture and requires no external signal. The "No Ultrasonic Mode" variant ensures switching frequency stays above 20 kHz to avoid audible noise, even at very light loads.
What protection features are built into the FAN23SV10MMPX, and how do they operate?
The FAN23SV10MMPX integrates valley-current OCP (via ILIM resistor), dual-level OVP (108% and 118% of VREF), UVP (89% VREF), thermal shutdown at 155°C with 15°C hysteresis, and PGOOD monitoring. During OVP Level 1, both MOSFETs turn off; during Level 2, only the HS turns off while LS remains on until power cycle. UVP pulls PGOOD low and halts switching. Thermal shutdown disables all gate drivers and auto-restarts at 140°C.
Can the FAN23SV10MMPX start up with a pre-biased output voltage?
Yes, the FAN23SV10MMPX supports startup on a pre-biased output. During soft-start, the low-side MOSFET is disabled until the first positive PWM edge, preventing reverse current flow that could discharge the output capacitor. The controller also forces PFM mode during soft-start to maintain positive inductor current, ensuring monotonic VOUT ramp-up even when VOUT is initially non-zero - a key requirement for hot-swap and redundant power systems.
FAN23SV10MMPX 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:
- 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)
FAN23SV10MMPX FAQ
1.How can I place an order for FAN23SV10MMPX through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN23SV10MMPX 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 FAN23SV10MMPX reliable?
The price and inventory of FAN23SV10MMPX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN23SV10MMPX is usually 5 days.
3.What payment methods are accepted for FAN23SV10MMPX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN23SV10MMPX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN23SV10MMPX?
FAN23SV10MMPX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN23SV10MMPX 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 FAN23SV10MMPX?
For technical support, including FAN23SV10MMPX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN23SV10MMPX requirements.
6.How does Aetrix verify that FAN23SV10MMPX is sourced from the original manufacturer or authorized distributors?
All FAN23SV10MMPX 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 FAN23SV10MMPX meets industry standards.
7.What is the process for return or replacement of FAN23SV10MMPX?
All FAN23SV10MMPX units undergo pre-shipment inspection (PSI). If there is an issue with FAN23SV10MMPX, 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 FAN23SV10MMPX part is unused and in its original packaging.
Return procedure for FAN23SV10MMPX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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