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Monolithic Power Systems Inc. MP2209DL-LF-P
- Part No.:
- MP2209DL-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
MP2209DL-LF-P.pdf
- Description:
- IC REG BUCK ADJ 2A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,623
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Product details
Overview
MP2209DL-LF-P from Monolithic Power Systems is a 600kHz fixed-frequency synchronous step-down DC/DC converter delivering up to 2A output current from a 3V–16V input, with adjustable output voltage (0.8V to 0.9×VIN), integrated 80mΩ high- and low-side MOSFETs, and power-good monitoring-designed for point-of-load regulation in FPGA I/O supplies and network equipment.
For engineers reviewing the MP2209DL-LF-P datasheet, MP2209DL-LF-P pinout, MP2209DL-LF-P application, or MP2209DL-LF-P equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and synchronization behavior, and real-world design constraints including soft-start timing, bootstrap capacitor requirements, and ±10% POK window tolerance.
Technical Context
The MP2209 employs peak-current-mode PWM control with internal Type II compensation, enabling stable operation using only ceramic output capacitors and small inductors (1–4.7μH). Its transconductance gain of 11.25A/V links COMP voltage directly to inductor peak current, simplifying loop design.
It features dual UVLO detection on both IN and VCC pins (2.85V/2.95V rising threshold, 300mV/200mV hysteresis), cycle-by-cycle current limiting (4A high-side / 2A low-side), and hiccup-mode short-circuit protection that discharges the soft-start capacitor before retrying.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 16V - supports wide industrial and telecom input rails without external pre-regulation. |
| Output Current | Up to 2A continuous - sufficient for FPGA core/I/O, ASIC bias, and mid-power PoL applications. |
| Switching Frequency | 600kHz fixed (±25%) - enables compact magnetics; synchronizable to 0.5–2MHz external clock via EN/SYNC pin. |
| Feedback Reference | 0.794V typical (±1.7% over temp) - sets output accuracy; used with external resistor divider for adjustable VOUT. |
| Thermal Shutdown | 150°C threshold with 20°C hysteresis - protects die during overload or poor PCB thermal design. |
| Power Good Window | ±10% of regulated VOUT - open-drain POK pin asserts LOW outside this band with 30μs deglitch. |
| Soft-Start Time | Configurable via SS-to-GND capacitor (tSS ≈ 0.8V × CSS/5μA) - prevents inrush into pre-biased outputs. |
Pinout & Package
MP2209DL-LF-P is housed in a thermally enhanced 3mm × 4mm, 14-lead QFN package with exposed thermal pad (connected to PGND/AGND). The package supports high-density PCB layouts and requires ≥4-layer board construction for optimal thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 12, Exposed Pad | PGND / AGND / Thermal Pad | Common ground return for power and analog sections; exposed pad must be soldered to GND plane for thermal dissipation (θJA = 48°C/W). |
| 2 | SS | Soft-start control node; internal 5μA current source charges external capacitor to ramp FB reference and limit inrush. |
| 4, 11 | SW | Switch node connecting internal high-/low-side MOSFETs to external inductor; all SW pins must be shorted externally. |
| 5, 10 | IN | Main power input (3–16V); requires local 10–22μF ceramic decoupling per pin to suppress switching noise. |
| 6 | N/C | No internal connection - must remain unconnected and unrouted. |
| 7 | BS | Bootstrap supply for high-side gate driver; requires 0.1μF ceramic capacitor between BS and SW. |
| 8 | VCC | Bias supply (3–6V) for control circuitry and gate drivers; requires local RC filter (10Ω + 1μF) for noise immunity. |
| 9 | POK | Open-drain power-good output; pulled LOW when VOUT deviates >±10%; requires external pull-up to VCC. |
| 13 | EN/SYNC | Dual-function pin: logic-level enable (0.4V/1.6V thresholds) or external clock sync input (0.5–2MHz). |
| 14 | FB | Feedback input referenced to 0.794V internal bandgap; connects to resistor divider to set output voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 80mΩ high-side + 80mΩ synchronous rectifier MOSFETs eliminate need for external Schottky diode and reduce conduction loss. |
| Ceramic-Capacitor Stability | Internally compensated peak-current-mode architecture ensures stability with low-ESR ceramic output caps - no electrolytic required. |
| Pre-Biased Output Startup | Disables switching until soft-start voltage exceeds sensed FB voltage - avoids reverse current flow into pre-charged loads. |
| Robust Fault Protection | Combines cycle-by-cycle current limiting, thermal shutdown, and hiccup-mode short-circuit recovery to prevent damage under fault. |
| Flexible Synchronization | EN/SYNC pin accepts external clock (0.5–2MHz) with automatic fallback to internal 600kHz if sync signal stalls beyond 4μs. |
Applications
| FPGA I/O Supply | Network Equipment PoL |
|---|---|
Use Scenario: Providing clean, tightly regulated 1.2V–3.3V I/O rail for Xilinx or Intel FPGAs in reconfigurable computing platforms. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering up to 2A with fast transient response and ±10% POK monitoring. Use Value: Internal compensation and ceramic-cap compatibility reduce BOM count by eliminating external compensation components and bulk output capacitors. |
Use Scenario: Generating 5V or 3.3V intermediate bus for Ethernet PHYs, switch controllers, and management microcontrollers in 1U rack gear. IC Role / Device Role / Timing Role: Point-of-load regulator with 600kHz switching and sync capability to avoid beat frequencies with system clocks. Use Value: 3mm×4mm QFN footprint and thermal pad enable high-power density on space-constrained telecom PCBs without heatsinks. |
| ASIC Core Bias | Industrial LCD Display Power |
Use Scenario: Delivering 1.0V–1.8V core voltage to ASICs in programmable logic controllers and motor drive MCUs. IC Role / Device Role / Timing Role: Adjustable-output buck converter with precise 0.794V reference and tight load regulation (<±1.5% over line/load/temp). Use Value: Soft-start and pre-bias startup prevent voltage overshoot or reverse current when powering ASICs with large decoupling banks. |
Use Scenario: Powering backlight drivers and TCON (timing controller) ICs in industrial-grade LCD panels requiring stable 5V/12V rails. IC Role / Device Role / Timing Role: Main DC/DC stage converting 12V or 24V system input to regulated display subsystem voltages. Use Value: Wide 3–16V input range accommodates fluctuating 12V automotive or 24V industrial supplies without additional front-end conversion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1474S | Successor device: 600kHz, 2A, improved efficiency (up to 95%), lower quiescent current (750μA → 350μA), same QFN14 package. | Drop-in replacement with identical pinout and layout compatibility; supports same input/output ranges and feedback topology. | Select MP1474S for new designs requiring longer battery life, lower thermal stress, or extended product lifecycle support. |
| MP2315GJ-Z | Higher integration: includes enable, POK, and thermal shutdown in 8-pin TSOT23; lower current rating (1.5A), 2.5–36V input range. | Smaller footprint but reduced current capacity; suited for space-constrained, lower-power applications where 2A is not required. | Choose MP2315GJ-Z only when board area is critical and load current remains ≤1.5A - not a functional substitute for full 2A operation. |
Compared with MP2209DL-LF-P, MP1474S offers measurable improvements in efficiency and thermal performance while maintaining pin-for-pin compatibility, whereas MP2315GJ-Z trades current capability and package size for integration density - making it unsuitable for full 2A FPGA or ASIC loads.
Availability
MP2209DL-LF-P is available at Aetrix Electronics and suitable for FPGA I/O supplies, network equipment point-of-load regulation, and industrial LCD display power systems requiring stable component supply and legacy design continuity.
Supply support for MP2209DL-LF-P 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
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers across Asia and North America and global manufacturing partnerships.
The MP2209 belongs to MPS's legacy synchronous buck regulator product line, engineered for cost-sensitive, medium-power DC/DC conversion in consumer, industrial, and networking applications where simplicity, reliability, and ceramic-cap stability are prioritized.
FAQ
What is the recommended soft-start capacitor value for a 1.8V output?
For a 1.8V output, use a 100nF capacitor from SS to AGND. This yields ~16ms soft-start time (tSS = 0.8V × 100nF / 5μA), providing controlled ramp-up without excessive delay. Larger values increase start time linearly but improve inrush suppression; values below 47nF may cause instability during pre-biased startup.
Can MP2209DL-LF-P operate with an input voltage below 3V?
No - the absolute minimum input voltage is 3V per the Recommended Operating Conditions table. Below 3V, the internal UVLO circuit holds the device in shutdown. Input must exceed 2.85V (rising edge) and remain above that threshold with 300mV hysteresis to sustain regulation.
Is the EN/SYNC pin compatible with 3.3V logic levels?
Yes - EN/SYNC recognizes logic HIGH at ≥1.6V and logic LOW at ≤0.4V, making it fully compatible with standard 3.3V CMOS outputs. When used for synchronization, the applied clock must be AC-coupled or level-shifted to avoid exceeding VCC voltage on the pin.
Does MP2209DL-LF-P support forced PWM mode at light load?
No - MP2209 operates exclusively in PWM mode across all load conditions. It does not feature pulse-skipping or burst-mode operation. Light-load efficiency is maintained via low quiescent current (750μA) and low RDS(on) MOSFETs, not variable frequency modulation.
What is the maximum allowable voltage on the FB pin?
The FB pin must not be driven above VCC, as stated in the Absolute Maximum Ratings and Operation section. Exceeding VCC risks damaging the internal error amplifier. The pin draws only ±50nA, so external resistive dividers must ensure no transient or ESD event pushes FB above the applied VCC voltage.
How does the bootstrap capacitor affect high-side gate drive?
A 0.1μF ceramic capacitor between BS and SW provides the floating supply for the high-side gate driver. If undersized or poorly placed, insufficient bootstrap voltage causes high-side MOSFET turn-on failure, leading to dropout or thermal runaway. Layout must minimize inductance in the BS-SW loop.
Why is MP2209 marked "Not Recommended for New Designs"?
MPS officially deprecated MP2209 in favor of MP1474S, which improves efficiency, reduces quiescent current, and extends product lifecycle support. While MP2209DL-LF-P remains available for legacy production, new designs should adopt MP1474S for better long-term supply assurance and performance.
MP2209DL-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 14.4V
- Current - Output:
- 2A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x4)
MP2209DL-LF-P FAQ
1.How can I place an order for MP2209DL-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2209DL-LF-P 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 MP2209DL-LF-P reliable?
The price and inventory of MP2209DL-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2209DL-LF-P is usually 5 days.
3.What payment methods are accepted for MP2209DL-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2209DL-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2209DL-LF-P?
MP2209DL-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2209DL-LF-P 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 MP2209DL-LF-P?
For technical support, including MP2209DL-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2209DL-LF-P requirements.
6.How does Aetrix verify that MP2209DL-LF-P is sourced from the original manufacturer or authorized distributors?
All MP2209DL-LF-P 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 MP2209DL-LF-P meets industry standards.
7.What is the process for return or replacement of MP2209DL-LF-P?
All MP2209DL-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2209DL-LF-P, 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 MP2209DL-LF-P part is unused and in its original packaging.
Return procedure for MP2209DL-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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