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onsemi FAN23SV60MPX
- Part No.:
- FAN23SV60MPX
- Manufacturer:
- onsemi
- Package:
- 34-PowerTFQFN
- Datasheet:
-
FAN23SV60MPX.pdf
- Description:
- IC REG BUCK ADJ 10A 34PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
FAN23SV60MPX from Fairchild Semiconductor is a 10 A integrated synchronous buck regulator with constant on-time control, supporting 7–24 V input (or 4.5–5.5 V with internal regulator bypass), 0.6–5.5 V programmable output, and up to 96% peak efficiency. It delivers precise regulation for CPU/GPU core supplies in notebooks and servers.
For engineers reviewing the FAN23SV60MPX datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed protection features (OVP/UVP/OTP/OC), and real-world design constraints including PFM ultrasonic mode, soft-start programmability, and thermal resistance (ΘJA = 35 °C/W).
Technical Context
The FAN23SV60MPX uses constant on-time modulation with VIN feed-forward to maintain stable switching frequency in CCM and enable seamless PFM transitions at light loads. Its architecture eliminates loop compensation and provides cycle-by-cycle valley current limiting via the ILIM pin.
It integrates dual over-voltage protection (11% and 22% thresholds), thermal shutdown at 155 °C with 15 °C hysteresis, and an internal boot diode. The device supports programmable frequency (200 kHz–1.5 MHz) via external resistor and offers adjustable sourcing current limit with ±10% accuracy at 7 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 7–24 V (bias via internal LDO); or 4.5–5.5 V when VIN/PVIN/PVCC tied to bypass LDO - enables dual-rail compatibility |
| Output Current | 10 A continuous - sufficient for high-performance CPU/GPU core rails |
| Efficiency | Up to 96% peak - reduces thermal load and improves system power density |
| MOSFET RDS(on) | HS: 12.2 mΩ, LS: 2.88 mΩ (TA = 25°C) - low conduction loss enables high-current operation without external heatsink |
| Reference Accuracy | ±1% over –40 to +125°C - ensures tight output regulation across industrial temperature range |
| Switching Frequency | Programmable 200 kHz–1.5 MHz - allows optimization of size (inductor/capacitor) vs. EMI/noise |
| Thermal Resistance | ΘJA = 35 °C/W (4-layer PCB, 7 cm × 7 cm) - defines maximum power dissipation before thermal shutdown |
Pinout & Package
34-lead PQFN package (5.5 mm × 5.0 mm, 0.5 mm pitch), thermally enhanced with exposed PGND pads and multiple PVIN/SW/AGND connections for low-inductance power routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (P2, pins 5–11) | Power input for high-side/low-side MOSFETs | Dedicated high-current input path; multiple parallel pins reduce IR drop and thermal stress |
| SW (P3, pins 2, 12–17, 22) | Switching node between HS and LS MOSFETs | High dv/dt node requiring short, low-inductance layout; 7 pins minimize parasitic inductance |
| PGND (pins 18–21) | Power ground return for LS MOSFET and gate driver | Direct thermal and electrical connection to exposed pad; critical for EMI and transient response |
| AGND (P1, pins 4, 23) | Analog reference ground for feedback and control circuitry | Must be separated from PGND at single-point to avoid noise coupling into FB/EN/SS |
| FB (pin 27) | Output voltage feedback input | Connects to resistor divider; 596 mV nominal trip point enables 0.6–5.5 V output programming |
| ILIM (pin 24) | Valley current limit threshold setting | Resistor to SW sets OC threshold with ±10% accuracy; open-detection prevents uncontrolled operation |
| FREQ (pin 32) | On-time and frequency programming | Resistor to AGND sets fSW; open-circuit detection disables switching to prevent infinite on-time |
| BOOT (pin 3) | High-side gate driver supply | Capacitor from BOOT to SW provides charge for HS turn-on; internal diode recharges capacitor during freewheeling |
Key Features
| Feature | Design Value |
|---|---|
| PFM with ultrasonic minimum frequency clamp | Maintains fSW >18 kHz under light load to avoid audible noise while maximizing efficiency |
| Programmable soft-start | Internal 10 µA current source charges external capacitor; enables monotonic startup and pre-bias operation |
| Dual-level over-voltage protection | First level (11%) disables both MOSFETs; second level (22%) forces LS on until power cycle - protects downstream ICs |
| Accurate enable with UVLO functionality | Rising threshold 1.26 V ±122 mV hysteresis - allows precise input-rail sequencing using resistive divider |
| Integrated linear bias regulator | 5.0 V ±2.5% output (PVCC) powers LS gate driver and boot diode - enables single-supply 7–24 V operation |
Applications
| Server Core Voltage Regulation | Notebook CPU Power Delivery |
|---|---|
Use Scenario: Regulating 1.2 V @ 10 A for multi-core Xeon processors in 1U rack servers with limited airflow. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing dynamic load transients and thermal throttling signals. Use Value: 96% peak efficiency and 35 °C/W ΘJA reduce board-level heat density; PFM mode maintains >85% efficiency at 100 mA load. | Use Scenario: Providing adaptive core voltage to Intel Core i7 processors in thin-and-light notebooks with battery and adapter inputs. IC Role / Device Role / Timing Role: Main DC-DC converter with programmable frequency (500 kHz) to balance EMI compliance and component size. Use Value: Pre-bias startup and monotonic soft-start prevent output glitches during hot-plug events; 0.6–5.5 V output range supports VID-based scaling. |
| Telecom Baseband Power | Gaming Console SoC Supply |
Use Scenario: Delivering 1.8 V @ 8 A to FPGA-based baseband processing units in LTE macro base stations. IC Role / Device Role / Timing Role: High-reliability power stage with dual OVP and thermal shutdown protecting expensive RF front-end components. Use Value: 155 °C thermal shutdown with 15 °C hysteresis ensures graceful recovery after sustained overload; ±1% reference holds regulation across –40 to +85 °C ambient. | Use Scenario: Supplying 1.05 V @ 10 A to AMD RDNA GPU cores in next-gen gaming consoles with aggressive thermal envelopes. IC Role / Device Role / Timing Role: Compact, high-current buck regulator mounted directly beneath SoC package for minimal power delivery impedance. Use Value: 34-pin PQFN (5.5 × 5.0 mm) enables dense placement; multiple SW/PGND pins reduce layout-induced voltage spikes during 10 A load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3.5–36 V input, 0.8–25 V output, 0.6 A max - lower current rating, no integrated power stage | Suitable for auxiliary rails only; cannot replace FAN23SV60MPX in main core supply | Select only for <1 A non-critical rails where footprint and cost outweigh performance needs. |
| TPS54620RGYT | 4.5–17 V input, 0.6–15 V output, 6 A max, external MOSFETs - higher design complexity, no integrated FETs | Requires external HS/LS MOSFETs and gate drivers; better for custom thermal management | Choose when board space allows discrete power stage and thermal requirements exceed integrated solution limits. |
Compared with MP2451DT-LF-Z and TPS54620RGYT, the FAN23SV60MPX delivers 10 A with integrated 12.2/2.88 mΩ MOSFETs in a compact 5.5 × 5.0 mm package, eliminating external power components and simplifying layout - making it optimal for space-constrained, high-current core rail designs.
Availability
FAN23SV60MPX is available at Aetrix Electronics and suitable for server motherboard development, notebook power subsystems, telecom base station power modules, and gaming console SoC power delivery requiring stable component supply and long-term lifecycle support.
Supply support for FAN23SV60MPX 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
Fairchild Semiconductor (now part of ON Semiconductor) is a global leader in power management and analog ICs, specializing in high-efficiency, thermally robust solutions for computing and communications infrastructure.
The FAN23SV60MPX belongs to the TinyBuck™ family of integrated synchronous buck regulators, designed specifically for high-current, low-voltage core power applications in space-constrained systems where thermal performance and transient response are critical.
FAQ
What input voltage ranges does the FAN23SV60MPX support, and how do they affect biasing?
The FAN23SV60MPX supports two distinct input configurations: 7–24 V operation using its internal linear regulator for bias (via VIN → VCC), or 4.5–5.5 V operation when VIN, PVIN, and PVCC are tied together to bypass the internal regulator. In the latter case, the device draws bias directly from the 5 V rail, eliminating LDO dropout and improving light-load efficiency. This dual-mode capability makes FAN23SV60MPX suitable for systems with mixed input rails, such as notebooks that switch between battery (12–19 V) and USB-C PD (5 V) sources.
How does the FAN23SV60MPX implement over-current protection, and what is the role of the ILIM pin?
The FAN23SV60MPX implements valley-current limiting by sensing low-side MOSFET conduction time through the ILIM pin. A resistor between ILIM and SW sets the current threshold with ±10% accuracy at 7 A. During over-current, the high-side MOSFET is disabled and the low-side remains on until current falls below the set point. An open-circuit detection on ILIM prevents uncontrolled operation if the resistor is omitted. This architecture ensures fast, accurate current limiting without external sense resistors - a key advantage of FAN23SV60MPX in high-efficiency, high-density designs.
Can the FAN23SV60MPX start up with a pre-biased output, and how is output discharge prevented?
Yes, the FAN23SV60MPX supports startup on a pre-biased output. To prevent discharging the existing VOUT voltage during soft-start, the low-side MOSFET is disabled until the first positive-going edge of the PWM signal. Additionally, the device is forced into PFM mode during soft-start to ensure inductor current remains positive. These mechanisms - combined with the SS pin's 400 mV clamp above FB voltage - guarantee monotonic ramp-up without output glitches, making FAN23SV60MPX ideal for hot-swap and multi-rail sequencing applications.
What are the thermal characteristics of the FAN23SV60MPX, and how do they impact PCB layout?
The FAN23SV60MPX has a junction-to-ambient thermal resistance (ΘJA) of 35 °C/W on a standard 4-layer PCB (7 cm × 7 cm, 1 oz copper). Its junction-to-PCB parameter (ψJPCB) is 2.3 °C/W, indicating strong thermal coupling to the board. Effective layout requires direct connection of the exposed PGND pad to internal ground planes, use of multiple thermal vias under the package, and separation of AGND and PGND except at a single point near the IC. These practices are essential to maintain safe junction temperatures below 125 °C under 10 A continuous load - a critical design requirement for FAN23SV60MPX reliability.
How does the constant on-time control architecture of the FAN23SV60MPX improve transient response compared to voltage-mode controllers?
The FAN23SV60MPX's constant on-time architecture provides inherent line and load transient response advantages: because tON is inversely proportional to VIN and directly proportional to VOUT, the controller responds within one switching cycle to input or load changes - no error amplifier compensation required. This eliminates phase-margin concerns and enables stable operation with ceramic-only output capacitors. As shown in datasheet Figures 20–23, FAN23SV60MPX achieves <50 µs recovery from 0%→50% load steps, outperforming traditional voltage-mode controllers that rely on slower loop bandwidths - a decisive benefit for CPU/GPU core rail applications demanding nanosecond-scale regulation.
FAN23SV60MPX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 34-PowerTFQFN
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7V
- 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)
FAN23SV60MPX FAQ
1.How can I place an order for FAN23SV60MPX through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN23SV60MPX 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 FAN23SV60MPX reliable?
The price and inventory of FAN23SV60MPX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN23SV60MPX is usually 5 days.
3.What payment methods are accepted for FAN23SV60MPX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN23SV60MPX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN23SV60MPX?
FAN23SV60MPX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN23SV60MPX 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 FAN23SV60MPX?
For technical support, including FAN23SV60MPX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN23SV60MPX requirements.
6.How does Aetrix verify that FAN23SV60MPX is sourced from the original manufacturer or authorized distributors?
All FAN23SV60MPX 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 FAN23SV60MPX meets industry standards.
7.What is the process for return or replacement of FAN23SV60MPX?
All FAN23SV60MPX units undergo pre-shipment inspection (PSI). If there is an issue with FAN23SV60MPX, 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 FAN23SV60MPX part is unused and in its original packaging.
Return procedure for FAN23SV60MPX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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