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Monolithic Power Systems Inc. MP2565DQ-LF-Z
- Part No.:
- MP2565DQ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP2565DQ-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 2.5A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,358
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Product details
Overview
MP2565DQ-LF-Z from Monolithic Power Systems is a 2.5A, 4MHz, 50V non-synchronous step-down DC/DC converter with integrated 220mΩ high-side MOSFET, current-mode control, and programmable switching frequency (up to 4MHz). It operates from 4.5V–50V input, delivers adjustable output from 0.8V–47V, and achieves up to 95% efficiency in automotive and industrial power systems.
For engineers reviewing the MP2565DQ-LF-Z datasheet, MP2565DQ-LF-Z pinout, MP2565DQ-LF-Z application, or MP2565DQ-LF-Z equivalent, key selection criteria include its 4MHz operation for EMI-sensitive AM/ADSL designs, 12µA shutdown current for battery-powered use, internal soft-start, and thermal shutdown with 150°C trip point.
Technical Context
The MP2565DQ-LF-Z employs peak-current-mode control with an internal error amplifier (200 V/V gain, 60 µA/V transconductance), COMP pin-based loop compensation, and a programmable oscillator set via external resistor (RFREQ) from FREQ pin to GND. Its current limit is internally set at 2.9–3.5A without external sensing.
It integrates a bootstrap driver for the high-side MOSFET (BST pin), supports frequency foldback at light load to prevent inductor current runaway, and features UVLO (3.0V rising threshold, 0.4V hysteresis) plus thermal shutdown (150°C activation, 15°C hysteresis) for fault-tolerant operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 50V - supports wide-range industrial and automotive battery inputs including 12V, 24V, and 48V systems. |
| Output Current | 2.5A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in embedded systems. |
| Switching Frequency | Up to 4MHz - enables compact magnetics and avoids AM radio/ADSL interference bands. |
| Feedback Reference | 0.8V ±2.4% - sets precise output voltage using standard resistive divider; enables 0.8V–47V adjustment range. |
| Quiescent Current | 120µA - ensures low standby power draw in always-on battery applications. |
| Shutdown Current | 12µA - extends battery life during system sleep modes. |
| Internal MOSFET RDS(ON) | 220mΩ - reduces conduction loss and simplifies layout by eliminating external high-side switch. |
Pinout & Package
MP2565DQ-LF-Z is housed in a thermally enhanced 3mm × 3mm QFN-10 package with exposed pad (connected to GND). The package supports high-power density designs and efficient heat dissipation in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch Node | Drives external Schottky diode; requires low-inductance layout to minimize switching spikes and EMI. |
| EN (Pin 3) | Enable Input | Positive logic control: >1.5V enables, <1.3V disables; internal 1µA pull-up allows floating-enable operation. |
| COMP (Pin 4) | Compensation Node | Error amplifier output; connects to RC network for loop stability tuning and transient response optimization. |
| FB (Pin 5) | Feedback Input | Senses scaled output voltage; compares to 0.8V reference to regulate VOUT with ±2.4% accuracy. |
| GND / Exposed Pad (Pin 6) | Power & Signal Ground | Primary return path for high-switching-current loops; exposed pad must be soldered to PCB ground plane for thermal and EMI performance. |
| FREQ (Pin 7) | Frequency Programming | Connects to ground via resistor to set oscillator frequency (e.g., 18kΩ → 4MHz); enables EMI tailoring. |
| VIN (Pins 8,9) | Input Supply | Powers internal regulators and high-side driver; requires local 10µF ceramic decoupling capacitor. |
| BST (Pin 10) | Bootstrap Supply | Charges external BST capacitor (VIN–SW); enables gate drive for integrated high-side MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 4MHz switching | Enables ultra-small inductors and capacitors while avoiding critical EMI bands (e.g., AM radio 530–1710 kHz). |
| Internal soft-start (1.3ms) | Prevents output overshoot during power-up; eliminates need for external timing components. |
| Stable with ceramic output capacitors | Reduces BOM count and footprint; eliminates reliance on higher-ESR tantalum or electrolytic types. |
| Thermal shutdown with 15°C hysteresis | Ensures self-recovery after overtemperature events without requiring system-level reset logic. |
| No external current-sense resistor | Reduces component count, board area, and power loss; improves accuracy via integrated current-sense MOSFET. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Powering 3.3V/5V logic rails in head-unit display controllers under 12V–42V battery input with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary step-down regulator providing regulated supply to MCU, CAN transceiver, and touch controller. Use Value: 50V absolute max rating and 4.5V–50V operating range withstand automotive load-dump and cold-crank transients without external protection. |
Use Scenario: Generating isolated 5V/12V rails for analog sensor front-ends and digital I/O in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter delivering stable output across wide ambient temperature (–40°C to +85°C). Use Value: 95% peak efficiency and 120µA quiescent current reduce thermal load and enable fanless enclosure design. |
| AM Radio EMI-Sensitive Power | Portable Test Equipment Supply |
|
Use Scenario: Powering RF receiver stages and audio amplifiers in handheld spectrum analyzers where switching noise must avoid 530–1710 kHz band. IC Role / Device Role / Timing Role: Fixed-frequency 4MHz buck converter whose harmonics fall outside AM broadcast band. Use Value: 4MHz fundamental places 1st harmonic at 4MHz and 2nd at 8MHz-well above AM band-eliminating filtering requirements. |
Use Scenario: Providing main 3.3V rail for battery-operated oscilloscope front-end ASICs with strict standby power budget. IC Role / Device Role / Timing Role: Low-quiescent, enable-controlled power stage enabling deep-sleep mode between measurements. Use Value: 12µA shutdown current extends Li-ion battery runtime beyond 100 hours in standby without compromising wake-up speed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DJ-LF-Z | Lower 36V max input, 0.6A output, fixed 2MHz frequency, smaller SOT23-6 package. | Suitable only for low-power, space-constrained consumer electronics-not automotive or industrial high-voltage use. | Select when input ≤36V and load <0.6A; not drop-in for MP2565DQ-LF-Z due to pinout and capability mismatch. |
| LM5164QPWPRQ1 | 42V max input, 1A output, 1MHz–2.2MHz programmable frequency, integrated high-side FET, AEC-Q100 qualified. | Designed specifically for automotive grade-1 (–40°C to +125°C) but lacks 50V rating and 2.5A capability. | Choose for automotive safety-critical systems requiring AEC-Q100; otherwise insufficient for 48V industrial or load-dump robustness. |
Compared with MP2451DJ-LF-Z and LM5164QPWPRQ1, MP2565DQ-LF-Z uniquely combines 50V input rating, 2.5A output, and 4MHz operation-enabling compact, high-voltage, high-current power delivery where alternatives fall short in voltage headroom, current capacity, or EMI performance.
Availability
MP2565DQ-LF-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and portable test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2565DQ-LF-Z 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 mixed-signal ICs for power management, motion control, and interface applications.
The MP2565 belongs to MPS's high-voltage DC/DC converter product line, engineered for rugged industrial and automotive environments demanding wide input range, high efficiency, and EMI resilience.
FAQ
What is the maximum recommended output voltage for MP2565DQ-LF-Z?
The MP2565DQ-LF-Z supports output voltages up to 47V, set by the FB resistive divider. This is limited by the internal 0.8V reference and the absolute maximum ratings of external components-not by the IC itself. Output stability requires proper compensation and low-ESR output capacitance.
Can MP2565DQ-LF-Z operate with a 3.3V input supply?
No. MP2565DQ-LF-Z has a minimum operating input voltage of 4.5V per its Recommended Operating Conditions. At 3.3V, the internal UVLO (rising threshold 3.0V) may allow initial startup, but regulation fails due to insufficient headroom for the internal 2.6V regulator and BST charging.
Is an external bootstrap diode required for reliable operation?
No external bootstrap diode is required-the MP2565DQ-LF-Z uses a charge-pump assisted bootstrap circuit that self-charges the BST capacitor from VIN to SW. However, a low-ESR ceramic capacitor (e.g., 0.1µF X7R) must be placed directly between BST and SW pins for stable high-side gate drive.
How does frequency foldback improve light-load efficiency?
At light loads, MP2565DQ-LF-Z reduces switching frequency to lower gate-driving and switching losses. This pulse-frequency modulation (PFM)-like behavior maintains >85% efficiency down to 10mA load-critical for battery longevity-without requiring external mode-control circuitry.
What is the thermal resistance (θJA) of the QFN-10 package?
The MP2565DQ-LF-Z in 3×3 QFN-10 has θJA = 50°C/W on a standard 4-layer JEDEC PCB (JESD51-7). With full exposed-pad soldering to a 2-in² copper pour, practical θJA can reach ~35°C/W, allowing 2.5A continuous operation at +85°C ambient without forced air.
Does MP2565DQ-LF-Z support synchronous rectification?
No. MP2565DQ-LF-Z is a non-synchronous buck converter and requires an external Schottky diode (e.g., B380-13-F) connected from SW to GND. It lacks a low-side MOSFET driver or synchronous control logic-unlike MPS's MP2459 or MPQ4420 families.
What is the minimum off-time specification, and why does it matter?
The MP2565DQ-LF-Z guarantees a minimum off-time of 100ns. This limits the maximum achievable duty cycle and thus constrains the lowest possible output voltage at high input voltages (e.g., VOUT ≥ 2.5V at VIN = 50V), preventing sub-harmonic instability in current-mode control.
MP2565DQ-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 50V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 47V
- Current - Output:
- 2.5A
- Frequency - Switching:
- Up to 4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP2565DQ-LF-Z FAQ
1.How can I place an order for MP2565DQ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2565DQ-LF-Z 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 MP2565DQ-LF-Z reliable?
The price and inventory of MP2565DQ-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2565DQ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2565DQ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2565DQ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2565DQ-LF-Z?
MP2565DQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2565DQ-LF-Z 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 MP2565DQ-LF-Z?
For technical support, including MP2565DQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2565DQ-LF-Z requirements.
6.How does Aetrix verify that MP2565DQ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2565DQ-LF-Z 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 MP2565DQ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2565DQ-LF-Z?
All MP2565DQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2565DQ-LF-Z, 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 MP2565DQ-LF-Z part is unused and in its original packaging.
Return procedure for MP2565DQ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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