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onsemi FAN2001MPX
- Part No.:
- FAN2001MPX
- Manufacturer:
- onsemi
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
FAN2001MPX.pdf
- Description:
- IC REG BUCK ADJ 1A 6MLP
- Quantity:
- Payment:
- Shipping:
Inventory:14,722
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Product details
Overview
FAN2001MPX from onsemi is a high-efficiency synchronous step-down DC-DC converter delivering up to 1 A output current, operating from 2.5 V to 5.5 V input, with adjustable output voltage from 0.8 V to VIN, and fixed 1.3 MHz PWM switching frequency - deployed in battery-powered portable devices requiring compact, low-quiescent-current power regulation.
For engineers reviewing the FAN2001MPX datasheet, pinout, applications, or equivalent options, key selection criteria include its 25 µA quiescent current in Power Save mode, dynamic voltage positioning for load transient headroom, thermal shutdown at 150°C, 96% peak efficiency, and WDFN6 3×3 mm package compatibility with space-constrained PCB layouts.
Technical Context
The FAN2001MPX implements a current-mode PFM/PWM hybrid control architecture: it operates in fixed-frequency 1.3 MHz PWM mode under moderate-to-heavy loads (≥150 mA typical), and transitions to pulse-skipping Power Save mode at light loads to maintain high efficiency. Its internal error amplifier compares FB voltage against a precise 0.8 V reference to regulate output.
It integrates dual MOSFET drivers with 250–350 mΩ PMOS and 200–300 mΩ NMOS RDS(on), supports 100% duty-cycle low-dropout operation near VIN ≈ VOUT, and features cycle-by-cycle current limiting (1500 mA typical), undervoltage lockout (2.1 V typ.), and digital soft-start with four-step current ramp-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single-cell Li-ion, Li-polymer, and multi-cell alkaline/NiMH battery inputs without external LDO pre-regulation. |
| Output Current | Up to 1 A - sufficient for powering core logic, memory, or RF subsystems in portable electronics. |
| Switching Frequency | 1.3 MHz (typ.) - enables use of small 3.3 µH inductors and ceramic capacitors, minimizing solution footprint. |
| Quiescent Current | 25 µA in Power Save mode - extends battery runtime during standby or low-activity states. |
| Reference Voltage | 0.8 V (typ.) - sets output voltage accuracy via external resistor divider (VOUT = 0.8 × (1 + R1/R2)). |
| Efficiency | 96% peak - achieved via synchronous rectification and low RDS(on) MOSFETs, reducing conduction losses. |
| Thermal Shutdown | 150°C activation with 20°C hysteresis - protects die integrity during sustained overload or poor heatsinking. |
Pinout & Package
Package: WDFN6 (3 mm × 3 mm, 0.95 mm pitch, exposed thermal pad), case 511CP - provides low thermal resistance (θJC = 8°C/W) and compact footprint for portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1 (AGND) | Analog Ground | Mandatory solder connection to PCB ground plane; separates noise-sensitive analog reference circuitry from power return paths. |
| 1 - VIN | Main Supply Input | Primary input rail connection; powers internal bias circuits and gate drivers - requires local 10 µF ceramic bypass capacitor. |
| 2 - PGND | Power Ground | High-current return path for internal MOSFET switches; must be externally tied to AGND with low-inductance trace or plane. |
| 3 - EN | Enable Control | Active-high logic input; pulls supply current below 1 µA when low - prevents floating by tying to VIN or GND via resistor. |
| 4 - FB | Feedback Sense | Connects to resistor divider midpoint; regulates output by comparing divided VOUT to 0.8 V internal reference. |
| 5 - NC | No Connection | Unbonded pin - must remain unconnected; no routing or copper fill allowed beneath this pad. |
| 6 - SW | Switching Node | Drives external inductor; carries high di/dt square wave - requires short, wide trace and adjacent ground pour for EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Eliminates external Schottky diode, reducing conduction loss and improving efficiency across full load range. |
| Dynamic Voltage Positioning | Shifts regulated output +0.8% above nominal during light load to provide headroom for fast load transients without undershoot. |
| 100% Duty-Cycle Operation | Enables dropout-free regulation when input voltage approaches output - critical for battery end-of-discharge operation. |
| Output Over-Voltage Protection | Hardware-based comparator clamps output if FB exceeds threshold, preventing damage to downstream ICs during feedback fault. |
| Digital Soft-Start | Four-step current ramp limits inrush into output capacitor, avoiding input rail collapse and output overshoot at startup. |
Applications
| Mobile Processors & SoCs | Digital Cameras |
|---|---|
|
Use Scenario: Powering ARM Cortex-A series application processors in smartphones and tablets with dynamically scaling core voltages. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated 1.0–1.2 V core supply with fast transient response. Use Value: Dynamic voltage positioning ensures ≥50 mV headroom during CPU burst loads, preventing logic errors or brownouts. |
Use Scenario: Supplying image sensor and ISP cores in compact digital cameras with limited battery capacity. IC Role / Device Role / Timing Role: Efficient 1.8 V or 2.8 V bias rail generator with ultra-low quiescent current during standby imaging modes. Use Value: 25 µA Power Save mode current extends standby time beyond 72 hours on a single CR2 lithium cell. |
| Hard Disk Drive Controllers | Set-Top Box SoC Cores |
|
Use Scenario: Regulating 1.2 V/1.5 V supplies for HDD controller ASICs in portable storage enclosures. IC Role / Device Role / Timing Role: High-current, low-noise buck converter interfacing directly with 3.3 V or 5 V USB bus input. Use Value: 96% peak efficiency minimizes heat generation inside thermally constrained metal enclosures. |
Use Scenario: Providing stable 1.1 V core voltage to MPEG decoder SoCs in low-power set-top boxes. IC Role / Device Role / Timing Role: Secondary regulated rail derived from main 3.3 V supply, supporting deep-sleep wake-up sequences. Use Value: Shutdown current <1 µA enables true zero-power standby while retaining fast (<1 ms) wake-up capability. |
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 |
|---|---|---|---|
| TPS62231DRYR | Fixed 1.8 V output (non-adjustable); 2.05 V to 6.5 V input; 3.6 µA quiescent current in DCS-Control™ mode. | Lacks adjustable output and dynamic voltage positioning; better suited for fixed-voltage, ultra-low-IQ always-on rails. | Select when output voltage is static and minimum quiescent current dominates over transient performance. |
| RT8059GJ6 | 1.5 MHz switching frequency; 2.5 V to 5.5 V input; 1 A rating; includes integrated soft-start but no PFM mode. | Higher 60 µA quiescent current in light-load mode; lacks dynamic voltage positioning and 100% duty-cycle capability. | Choose where predictable fixed-frequency operation is prioritized over battery life optimization in variable-load systems. |
Compared with TPS62231DRYR and RT8059GJ6, the FAN2001MPX uniquely combines adjustable output, dynamic voltage positioning, 25 µA Power Save quiescent current, and 100% duty-cycle operation - making it optimal for battery-powered systems requiring both wide VOUT flexibility and extended runtime under dynamic load profiles.
Availability
FAN2001MPX is available at Aetrix Electronics and suitable for mobile processors & SoCs, digital cameras, hard disk drive controllers, set-top box SoC cores, and other applications requiring stable component supply with tight parametric consistency and long-term lifecycle support.
Supply support for FAN2001MPX 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 focused on energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The FAN2001MPX belongs to onsemi's high-efficiency DC-DC converter product line, designed specifically for battery-powered portable electronics demanding minimal board area, low quiescent current, and robust transient performance.
FAQ
What is the maximum output current supported by the FAN2001MPX?
The FAN2001MPX supports up to 1 A of continuous output current across its specified input voltage range (2.5 V to 5.5 V) and operating temperature range (−40°C to +85°C ambient). This rating assumes proper PCB layout with adequate copper area for thermal dissipation and use of recommended external components - including a 3.3 µH inductor and 2 × 10 µF output capacitance - as defined in the official onsemi datasheet for FAN2001MPX.
Does the FAN2001MPX support adjustable output voltage, and how is it configured?
Yes, the FAN2001MPX supports fully adjustable output voltage from 0.8 V to VIN using an external resistor divider connected to the FB pin. The output is set by VOUT = 0.8 V × (1 + R1/R2), where R1 connects between VOUT and FB, and R2 connects between FB and AGND. The datasheet specifies R1 + R2 ≤ 800 kΩ, and recommends R2 = 10 kΩ or 100 kΩ depending on quiescent current trade-offs - confirming this configuration method applies directly to the FAN2001MPX.
What protection features are integrated into the FAN2001MPX?
The FAN2001MPX integrates multiple hardware-level protections: cycle-by-cycle overcurrent limiting (1500 mA typical), thermal shutdown at 150°C with 20°C hysteresis, output over-voltage protection triggered by FB pin monitoring, undervoltage lockout (UVLO) with 2.1 V threshold and 150 mV hysteresis, and short-circuit protection that reduces average input current to ~200 mA during fault. All these functions operate autonomously without external components - verified in the FAN2001MPX datasheet's Electrical Characteristics and Detailed Operation sections.
How does the FAN2001MPX manage efficiency at light loads?
The FAN2001MPX maintains high efficiency at light loads by automatically entering Pulse Frequency Modulation (PFM) power-save mode, where it skips switching cycles instead of reducing duty cycle. In this mode, quiescent current drops to 25 µA (typ.), and regulation is maintained by activating bursts only when output voltage drifts beyond ±0.8% of nominal. This behavior - confirmed in the FAN2001MPX datasheet's Applications Information and Typical Performance Characteristics - avoids the efficiency collapse seen in fixed-frequency PWM-only converters below ~150 mA load.
What is the package type and thermal performance of the FAN2001MPX?
The FAN2001MPX uses a WDFN6 (3 mm × 3 mm, 0.95 mm pitch) package with exposed thermal pad (case 511CP), offering a junction-to-case thermal resistance (θJC) of 8°C/W. This package enables efficient heat transfer to the PCB ground plane when soldered per onsemi's layout guidelines - a specification explicitly documented for the FAN2001MPX in the Mechanical Case Outline and Absolute Maximum Ratings sections of its datasheet.
FAN2001MPX 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)
FAN2001MPX FAQ
1.How can I place an order for FAN2001MPX through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN2001MPX 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 FAN2001MPX reliable?
The price and inventory of FAN2001MPX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN2001MPX is usually 5 days.
3.What payment methods are accepted for FAN2001MPX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN2001MPX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN2001MPX?
FAN2001MPX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN2001MPX 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 FAN2001MPX?
For technical support, including FAN2001MPX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN2001MPX requirements.
6.How does Aetrix verify that FAN2001MPX is sourced from the original manufacturer or authorized distributors?
All FAN2001MPX 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 FAN2001MPX meets industry standards.
7.What is the process for return or replacement of FAN2001MPX?
All FAN2001MPX units undergo pre-shipment inspection (PSI). If there is an issue with FAN2001MPX, 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 FAN2001MPX part is unused and in its original packaging.
Return procedure for FAN2001MPX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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