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onsemi FAN2002MPX
- Part No.:
- FAN2002MPX
- Manufacturer:
- onsemi
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
FAN2002MPX.pdf
- Description:
- IC REG BUCK ADJ 1A 6MLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,995
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Product details
Overview
FAN2002MPX from onsemi is a synchronous step-down DC-DC converter delivering up to 1 A output current with adjustable output voltage (0.8 V to 5.5 V) across a 2.5 V–5.5 V input range. It operates in dual-mode PWM (1.3 MHz fixed frequency) and pulse-skipping Power Save mode, features dynamic voltage positioning, soft-start, over-voltage protection, and thermal shutdown - deployed in battery-powered portable electronics requiring high efficiency and low quiescent current.
For engineers reviewing the FAN2002MPX datasheet, pinout, applications, or equivalent options, key selection criteria include its 25 µA quiescent current in Power Save mode, 1.3 MHz switching frequency, WDFN6 3×3 mm package with verified 6-pin terminal mapping, and support for 100% duty-cycle low-dropout operation under light-load or near-VIN conditions.
Technical Context
The FAN2002MPX implements a current-mode PFM/PWM hybrid control architecture: at light loads (<150 mA typical), it enters pulse-skipping Power Save mode to maintain >90% efficiency; above that threshold, it transitions seamlessly to fixed-frequency 1.3 MHz PWM control with cycle-by-cycle current limiting (1500 mA typical) and slope compensation.
Its internal analog block includes a 0.8 V reference, error amplifier, dual comparators (PWM, PFM, over-voltage), digital soft-start logic, UVLO (2.1 V typ., 150 mV hysteresis), and MOSFET drivers for integrated P/N-channel synchronous switches - all optimized for fast transient response (<10 µs recovery from 100 mA→1 A load step) and stable regulation across −40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 1 A continuous - supports single-core processors, memory rails, and RF modules in portable devices. |
| Input Voltage Range | 2.5 V to 5.5 V - compatible with Li-ion (3.0–4.2 V), USB (5 V), and multi-cell alkaline/battery stacks. |
| Adjustable Output Voltage | 0.8 V to 5.5 V via external resistor divider - enables precise core voltage tuning for SoCs, FPGAs, and sensors. |
| Switching Frequency | 1.3 MHz (typ.) - allows use of compact 3.3 µH inductors and ceramic capacitors without audible noise. |
| Quiescent Current | 25 µA in Power Save mode - extends battery runtime in standby/sleep states of handheld devices. |
| Efficiency | Up to 96% at 500 mA - minimizes thermal dissipation in space-constrained PCB layouts. |
| Thermal Protection | 150°C trip with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
Package: WDFN6 (3×3 mm, 0.95 mm pitch, Case 511CP), thermally enhanced MLP with exposed thermal pad (P1/AGND soldered to PCB ground plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1 (AGND) | Analog Ground | Reference node for feedback and internal circuitry; must be low-impedance connection to PCB ground plane. |
| Pin 1 (FB) | Feedback Input | Connects to resistor divider; regulates output by comparing divided voltage against 0.8 V internal reference. |
| Pin 2 (PGND) | Power Ground | Return path for high-current MOSFET switches; requires separate low-inductance trace to AGND. |
| Pin 3 (SW) | Switching Node | Drives external inductor; carries high di/dt pulses - critical for EMI control and layout routing. |
| Pin 4 (PVIN) | Power Input | Supplies internal N-channel MOSFET; connects directly to input capacitor for low-ESR path. |
| Pin 5 (VIN) | Analog Input Supply | Provides bias to control circuitry; decoupled separately from PVIN to reduce noise coupling. |
| Pin 6 (EN) | Enable Input | Active-high logic control (VENH ≥ 1.3 V); pulls supply current <1 µA when low - enables system-level power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated P/N-channel MOSFETs eliminate external diode losses - improves efficiency by 5–10% vs. asynchronous designs. |
| Dynamic Voltage Positioning | Output shifted +0.8% above nominal during transients - provides headroom to prevent brownout during sudden load steps. |
| 100% Duty-Cycle Operation | Enables dropout-free regulation when VIN ≈ VOUT - maintains rail stability during battery voltage sag. |
| Dual-Mode Control Logic | Automatic transition between PWM and PFM modes - sustains >85% efficiency from 1 mA to 1 A load range. |
| Integrated Protection | Over-voltage, thermal shutdown, cycle-by-cycle current limit, and UVLO - eliminates need for external fault management circuitry. |
Applications
| Smartphone Core Rail | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powers application processor core (e.g., ARM Cortex-A series) in smartphones during active and sleep cycles. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering dynamically scaled 0.8–1.2 V at up to 1 A with fast transient response. Use Value: 25 µA quiescent current extends standby time; 1.3 MHz switching enables small 3.3 µH inductor and 2×10 µF ceramic output capacitance. |
Use Scenario: Supplies clean, low-noise bias to CMOS image sensor analog front-end in compact digital cameras. IC Role / Device Role / Timing Role: Low-ripple, adjustable voltage source with dynamic voltage positioning to handle sensor readout current spikes. Use Value: 96% peak efficiency reduces self-heating; soft-start prevents sensor reset glitches during power-up. |
| Portable HDD Preamp | Set-Top Box Tuner Module |
Use Scenario: Regulates 3.3 V rail for hard disk drive preamplifier ICs in ultra-thin notebooks and external storage. IC Role / Device Role / Timing Role: High PSRR, low-noise buck converter supporting sensitive analog signal paths. Use Value: Synchronous operation and ceramic capacitor compatibility minimize output ripple (<20 mVpp) at 1 A load. |
Use Scenario: Provides stable 1.8 V or 3.3 V supply to QAM demodulator and tuner ICs in energy-efficient set-top boxes. IC Role / Device Role / Timing Role: Efficient mid-power POL regulator with enable control for channel power gating. Use Value: EN pin allows firmware-controlled rail shutdown; thermal shutdown prevents overheating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | Fixed 1.8 V output (non-adjustable); 2.05 V–6.5 V input; 1.7 MHz switching; 17 µA IQ | Lacks FB pin and output adjustability - suitable only for fixed-voltage rails | Select when board space is constrained and output voltage is invariant across product variants. |
| RT8059GJ6 | Adjustable 0.6 V–5.5 V output; 2.5 V–5.5 V input; 1.5 MHz switching; 30 µA IQ; no dynamic voltage positioning | Missing DVP and lower efficiency (94% max) - less robust under fast load transients | Prefer where cost sensitivity outweighs transient performance requirements in consumer audio accessories. |
Compared with FAN2002MPX, TPS62231DRVR trades adjustability for lower quiescent current and higher frequency, while RT8059GJ6 offers similar adjustability but lacks dynamic voltage positioning and delivers marginally lower efficiency - making FAN2002MPX optimal for battery-powered systems demanding both precision regulation and transient resilience.
Availability
FAN2002MPX is available at Aetrix Electronics and suitable for smartphone core rails, digital camera sensor bias, portable HDD preamps, set-top box tuner modules, and other battery-powered portable electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for FAN2002MPX 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 (formerly Fairchild Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The FAN2002MPX belongs to onsemi's high-efficiency DC-DC converter product line, engineered specifically for battery-powered portable devices where extended runtime, small solution size, and robust transient performance are critical design constraints.
FAQ
What is the recommended inductor value for FAN2002MPX?
The FAN2002MPX is optimized for a 3.3 µH inductor, such as Panasonic ELL6PM3R3N or Murata LQS66C3R3M04. This value balances ripple current, efficiency, and transient response across the full 1 A load range. Lower inductance increases ripple and EMI; higher inductance slows load-step recovery. The datasheet specifies saturation current >1.5 A and low DCR for best thermal performance.
Does FAN2002MPX support 100% duty-cycle operation, and under what conditions?
Yes, the FAN2002MPX supports 100% duty-cycle operation when the input voltage approaches the output voltage - enabling dropout-free regulation during battery voltage sag. This occurs automatically when the required duty cycle exceeds ~95%, turning the P-channel MOSFET fully on. The output then equals VIN minus ILOAD × RDS(on), preserving functionality down to VIN = VOUT + (ILOAD × RDS(on)).
How does the dynamic voltage positioning feature work in FAN2002MPX?
In FAN2002MPX, dynamic voltage positioning shifts the regulated output voltage +0.8% above nominal during load transients - providing extra headroom to prevent brownout when current demand surges. This is implemented in the feedback loop and active in both PWM and Power Save modes. Once the transient settles, the output returns precisely to the programmed value, ensuring long-term accuracy while improving system robustness.
What are the critical PCB layout requirements for FAN2002MPX?
Key PCB layout practices for FAN2002MPX include: (1) short, wide traces for SW, PGND, and PVIN to minimize inductance; (2) separate AGND and PGND pours tied at a single point near P1; (3) input capacitor placed directly between PVIN and PGND; (4) feedback resistors routed away from SW and inductor to avoid noise coupling; and (5) thermal pad (P1) soldered to a solid copper ground plane with ≥4 thermal vias. These reduce EMI, improve thermal performance, and ensure stable regulation.
Can FAN2002MPX be used with an output voltage below 0.8 V?
No - the FAN2002MPX has a fixed 0.8 V internal reference, and its feedback architecture requires VOUT ≥ 0.8 V for proper regulation. Attempting to set output below this threshold results in loss of regulation and unpredictable behavior. For sub-0.8 V rails, a different converter with a lower reference (e.g., 0.6 V) or an external reference solution is required. The datasheet explicitly specifies 0.8 V as the minimum adjustable output voltage for FAN2002MPX.
FAN2002MPX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- 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):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- 1.3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-MLP (3x3)
FAN2002MPX FAQ
1.How can I place an order for FAN2002MPX through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN2002MPX 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 FAN2002MPX reliable?
The price and inventory of FAN2002MPX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN2002MPX is usually 5 days.
3.What payment methods are accepted for FAN2002MPX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN2002MPX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN2002MPX?
FAN2002MPX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN2002MPX 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 FAN2002MPX?
For technical support, including FAN2002MPX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN2002MPX requirements.
6.How does Aetrix verify that FAN2002MPX is sourced from the original manufacturer or authorized distributors?
All FAN2002MPX 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 FAN2002MPX meets industry standards.
7.What is the process for return or replacement of FAN2002MPX?
All FAN2002MPX units undergo pre-shipment inspection (PSI). If there is an issue with FAN2002MPX, 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 FAN2002MPX part is unused and in its original packaging.
Return procedure for FAN2002MPX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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