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onsemi FAN65004C
- Part No.:
- FAN65004C
- Manufacturer:
- onsemi
- Package:
- 35-PowerWFQFN
- Datasheet:
-
FAN65004C.pdf
- Description:
- IC REG BUCK 5V 6A 35PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,441
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Product details
Overview
FAN65004C from onsemi is a synchronous buck regulator IC integrating controller, gate drivers, and high-side/low-side PowerTrench® MOSFETs in a single 6 × 6 mm PQFN package. It delivers up to 6 A continuous output current across a 4.5 V–65 V input range, employs fixed-frequency voltage-mode PWM control with input voltage feed-forward, and achieves ±0.67% reference accuracy (0.6 V) for tight regulation in telecom POL and industrial DC/DC applications.
For engineers reviewing the FAN65004C datasheet, pinout, applications, or equivalent options, key selection considerations include its programmable 100 kHz–1 MHz switching frequency, dual-LDO bias architecture, cycle-by-cycle current limiting via ILIM pin, PFM/CCM mode selection, and comprehensive protection suite including OVP, UVP, SCP, OTP, and hiccup-mode fault recovery.
Technical Context
The FAN65004C implements a voltage-mode PWM architecture with input voltage feed-forward compensation to maintain stable loop gain across its 4.5 V–65 V VIN range. Its error amplifier features 10 MHz unity-gain bandwidth and 80 dB DC gain, supporting external compensation for wide operating conditions.
It integrates two LDOs-LDO1 (HVBIAS-fed) and LDO2 (EXTBIAS-fed)-with automatic switchover at ~4.7 V and dual-mode operation (LDO or switch-mode) depending on input voltage level. Protection logic includes 1024-cycle OCP hiccup, single-cycle SCP, thermal shutdown at 150°C with 20°C hysteresis, and dual-level FB-based OVP (115%/130% VREF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V - supports wide-range industrial, telecom, and battery-derived supplies without pre-regulation. |
| Output Current | 6 A continuous - enables compact high-power-density point-of-load conversion in space-constrained designs. |
| Reference Voltage | 0.6 V ±0.67% - ensures ±6 mV absolute output voltage tolerance over temperature and line, critical for precision rails. |
| Switching Frequency | 100 kHz to 1 MHz - adjustable via RT resistor or external SYNC signal, balancing efficiency, size, and EMI. |
| Protection Features | OCP, SCP, OTP, OVP1/OVP2, UVP, UVLO, PGOOD - full fault coverage with hiccup or latch-off behavior per condition. |
| Package | 6 mm × 6 mm PQFN-35 - thermally enhanced with RJA = 21.1°C/W (6-layer board), enabling high power dissipation in minimal footprint. |
| LDO Outputs | PVCC = 5.0 V ±5%, dual-input (HVBIAS/EXTBIAS), auto-switchover at 4.7 V - reduces system bias loss and improves efficiency vs. discrete LDOs. |
Pinout & Package
Package: 6 mm × 6 mm, 35-pin PQFN (Case 483BE), thermally enhanced with exposed PGND pad for optimal heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1–3, 31–35 + VIN Pad) | Main power input to high-side MOSFET and HVBIAS LDO | Accepts 4.5–65 V; multiple pads reduce IR drop and improve thermal conduction. |
| PGND (Pins 4–6 + PGND Pad) | Power ground return for MOSFETs and PVCC | Low-inductance path essential for switching stability and EMI control; tied to exposed thermal pad. |
| SW (Pins 7–10) | Switch node connecting high-side and low-side MOSFETs | High dv/dt node requiring short, low-inductance layout; connects directly to inductor and output capacitor. |
| PH (Pin 30) | High-side source connection for bootstrap capacitor | Provides return path for BOOT capacitor; must be routed with minimal loop area to suppress ringing. |
| BOOT (Pin 29) | Bootstrap supply for high-side gate driver | Requires ceramic capacitor (e.g., 0.1 µF) between BOOT and PH; enables N-channel high-side drive. |
| ILIM (Pin 14) | Peak current limit set point | Resistor-to-GND sets high-side MOSFET current limit via 30 µA current source and 206 A/Ω scaling factor. |
| FB (Pin 15) | Feedback input for output voltage regulation | Monitors resistive divider; 0.6 V reference enables precise output setting (e.g., 5 V with 10 k/12.5 k divider). |
| COMP (Pin 16) | Error amplifier output for external compensation | Connects to Type II/III network; allows loop optimization for load step response and phase margin >67°. |
| EN/UVLO (Pin 22) | Enable and input UVLO threshold control | 1.22 V threshold enables startup at defined VIN; resistor divider configures system-level UVLO (e.g., 35 V). |
| PGOOD (Pin 20) | Open-drain power-good indicator | Asserts HIGH when FB is within 94–110% VREF; used for sequencing and fault monitoring in multi-rail systems. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM with VIN feed-forward | Maintains consistent loop dynamics across 4.5–65 V input, eliminating need for adaptive compensation. |
| Adjustable soft-start via SS pin | Capacitor-to-PGND sets ramp time; prevents inrush current and output overshoot during startup. |
| Dual LDO architecture (HVBIAS/EXTBIAS) | Reduces total bias power loss by selecting optimal LDO based on available input voltages; supports single- or dual-supply biasing. |
| Programmable CCM/PFM light-load mode | Extends efficiency below 10% load via pulse-skipping while maintaining regulation; avoids audible noise. |
| Integrated current sense and cycle-by-cycle OCP | Eliminates external sense resistor; 1024-cycle hiccup on moderate overload, immediate shutdown on short-circuit. |
| Thermally robust PQFN-35 package | RJB = 3.4°C/W enables >5 W power dissipation on standard PCBs without heatsink, simplifying thermal design. |
Applications
| Telecom Base Station POL | Industrial Automation Power Supply |
|---|---|
|
Use Scenario: Converting 48 V backplane to 5 V/6 A for FPGA I/O banks and transceivers in 5G remote radio units. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated rail with fast transient response and low output ripple. Use Value: Integrated MOSFETs and 65 V rating eliminate external high-voltage switches; 0.67% VREF ensures compliance with strict SerDes voltage tolerances. |
Use Scenario: Generating 24 V/6 A from 36–60 V battery or rectified AC in PLC I/O modules and motor drives. IC Role / Device Role / Timing Role: High-reliability DC/DC converter with robust protection against load dumps, reverse polarity, and overtemperature. Use Value: Dual OVP levels (115%/130% VREF) and hiccup-mode recovery prevent latch-up during field faults; 125°C ambient rating supports sealed enclosures. |
| USB-C PD Sink Converter | Networking Equipment Mid-Rail Supply |
|
Use Scenario: Stepping down variable 9–20 V USB-C PD input to stable 5 V/6 A for high-power peripherals like docking stations. IC Role / Device Role / Timing Role: Adaptive-input buck regulator supporting dynamic voltage negotiation while maintaining regulation under load steps. Use Value: 100 kHz–1 MHz frequency tuning allows EMI spread-spectrum alignment with USB-C timing; PFM mode extends standby battery life. |
Use Scenario: Providing 3.3 V/6 A from 12 V intermediate bus in enterprise switches and routers with dense ASIC power requirements. IC Role / Device Role / Timing Role: Compact, high-efficiency POL solution minimizing board area and thermal hotspots near data-path ICs. Use Value: 6 × 6 mm PQFN footprint saves >40% area vs. discrete controller+MOSFET solutions; integrated LDOs reduce component count by 4–6 parts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4316-AEC1 | Automotive-grade (AEC-Q100), 60 V max input, 6 A, but uses current-mode control and lacks dual-LDO architecture. | Targeted for automotive infotainment and ADAS; no EXTBIAS switchover or HVBIAS feed-forward. | Choose MPQ4316-AEC1 only if AEC-Q100 qualification is mandatory and feed-forward compensation is not required. |
| LM5164QDPRTQ1 | 4.5–65 V input, 6 A, but external MOSFETs required; no integrated LDOs or PFM mode; current-mode control only. | Suitable for high-temp industrial environments where external FETs enable custom thermal management. | Select LM5164QDPRTQ1 when discrete FET selection (e.g., SiC/GaN) or higher junction temperature (>150°C) is needed. |
Compared with MPQ4316-AEC1 and LM5164QDPRTQ1, the FAN65004C provides superior integration (MOSFETs + dual LDOs + feed-forward), tighter reference accuracy (±0.67% vs. ±1%), and flexible light-load operation-making it optimal for space-constrained, high-precision non-automotive POL designs.
Availability
FAN65004C is available at Aetrix Electronics and suitable for telecom base station power supplies, industrial automation equipment, and USB-C PD sink converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for FAN65004C 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The FAN65004C belongs to onsemi's high-voltage synchronous buck regulator product line, designed specifically for compact, high-efficiency point-of-load conversion in demanding 48 V and battery-derived systems.
FAQ
What is the maximum input voltage rating for the FAN65004C?
The FAN65004C has an absolute maximum VIN rating of 70 V, with recommended continuous operation up to 65 V. This allows safe use in 48 V telecom systems with transient surges and 60 V industrial battery inputs. Exceeding 65 V may trigger the internal input overvoltage protection at 66.7–69.3 V, causing hiccup-mode recovery.
How does the FAN65004C achieve 0.67% reference voltage accuracy?
The FAN65004C achieves ±0.67% reference voltage accuracy (0.6 V) through laser-trimmed bandgap circuitry and on-die calibration across −40°C to +125°C. This specification is guaranteed over full temperature and line range-not just at 25°C-enabling precise output regulation without external trimming in mission-critical rails.
Can the FAN65004C operate without an external compensation network?
No, the FAN65004C requires an external Type II or Type III compensation network connected to the COMP pin. The internal error amplifier is unbuffered and relies on external RC components to stabilize the voltage-mode control loop. Omitting compensation will cause instability, oscillation, or poor transient response-verified in typical application Figure 1 and Table 1 design examples.
What is the purpose of the EXTBIAS pin on the FAN65004C?
The EXTBIAS pin on the FAN65004C provides a secondary input to the internal LDO2, enabling automatic switchover from HVBIAS-fed LDO1 when EXTBIAS exceeds 4.7 V. This reduces power loss by biasing the gate driver from a lower-voltage rail (e.g., 5 V or 12 V output), improving overall system efficiency-especially in multi-output converters.
Does the FAN65004C support synchronization to an external clock?
Yes, the FAN65004C supports frequency synchronization via the SYNC pin. In non-master mode, it locks to an external clock (70–130% of RT-set frequency); in master mode, it outputs a 50% duty-cycle clock. Synchronization eliminates beat frequencies in multi-phase systems and aids EMI compliance-detailed in Table 5 and Figures 24–25 of the datasheet.
FAN65004C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 35-PowerWFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 6A
- Frequency - Switching:
- 100kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 35-PQFN (6x6)
FAN65004C FAQ
1.How can I place an order for FAN65004C through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN65004C 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 FAN65004C reliable?
The price and inventory of FAN65004C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN65004C is usually 5 days.
3.What payment methods are accepted for FAN65004C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN65004C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN65004C?
FAN65004C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN65004C 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 FAN65004C?
For technical support, including FAN65004C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN65004C requirements.
6.How does Aetrix verify that FAN65004C is sourced from the original manufacturer or authorized distributors?
All FAN65004C 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 FAN65004C meets industry standards.
7.What is the process for return or replacement of FAN65004C?
All FAN65004C units undergo pre-shipment inspection (PSI). If there is an issue with FAN65004C, 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 FAN65004C part is unused and in its original packaging.
Return procedure for FAN65004C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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