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Monolithic Power Systems Inc. MP4560DN-LF-Z
- Part No.:
- MP4560DN-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP4560DN-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,353
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Product details
Overview
MP4560DN-LF-Z from Monolithic Power Systems is a non-synchronous step-down DC/DC converter with integrated 250mΩ high-side 55V MOSFET, delivering up to 2A output current at up to 2MHz switching frequency across a 3.8V–55V input range. It features 140μA quiescent current, internal soft-start, and ceramic-capacitor-stable operation-designed for automotive power rails, industrial distributed supplies, and battery-powered systems requiring high-voltage step-down.
For engineers reviewing the MP4560DN-LF-Z datasheet, MP4560DN-LF-Z pinout, MP4560DN-LF-Z application, or MP4560DN-LF-Z equivalent, this device supports fast transient response via current-mode control, programmable frequency (up to 2MHz), precision 0.8V feedback reference, thermal shutdown, and UVLO with hysteresis-critical for robust high-input-voltage buck design.
Technical Context
The MP4560DN-LF-Z implements peak current-mode PWM control with cycle-by-cycle current limiting and frequency foldback during startup or short-circuit events. Its error amplifier delivers 400V/V gain and 120µA/V transconductance, with COMP pin clamped between 0.9V and 2.0V for stable loop compensation.
It uses an external bootstrap capacitor (BST–SW) charged via internal regulator to drive the high-side MOSFET, with dedicated UVLO (2.2V rising threshold, 150mV hysteresis) on the floating driver. The FREQ pin accepts a resistor to ground for precise oscillator tuning from ~500kHz to 2MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 55V - supports direct connection to automotive batteries (12V/24V/48V systems) and industrial HV rails without pre-regulation. |
| Output Current | 2A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in compact embedded systems. |
| Switching Frequency | Up to 2MHz - enables use of small inductors (e.g., 4.7µH–10µH) and avoids AM radio/ADSL EMI bands. |
| Feedback Reference | 0.800V ±20mV - sets output voltage accuracy; allows adjustable VOUT from 0.8V to 52V using external resistor divider. |
| Quiescent Current | 140µA - ensures low standby power draw in always-on battery applications such as telematics or remote sensors. |
| High-Side RDS(on) | 250mΩ typ - reduces conduction loss at 2A load; junction temperature rise limited by θJA = 50°C/W (SOIC8E). |
| Shutdown Current | 12µA typ - enables ultra-low-power disable mode for system-level energy management. |
Pinout & Package
MP4560DN-LF-Z is housed in an SOIC-8 package with exposed thermal pad (SOIC8E), optimized for PCB heat dissipation and manufacturability in high-volume production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 7,8) | Input supply rail | Primary power input for internal circuitry and high-side switch; requires local 4.7µF ceramic decoupling to suppress switching noise. |
| SW (Pin 1) | Switch node | Drain of internal high-side MOSFET; connects to external Schottky diode cathode and inductor; critical for EMI layout. |
| EN (Pin 2) | Enable control | Positive-logic enable with 1.55V rising threshold; internal 1µA pull-up allows floating-enable; supports system-level power sequencing. |
| FB (Pin 4) | Feedback input | Compares output voltage (via resistive divider) against 0.8V internal reference; determines regulation setpoint and loop stability. |
| COMP (Pin 3) | Error amplifier output | Provides current-source output for external RC compensation network; clamped 0.9V–2.0V to prevent saturation and ensure phase margin. |
| GND (Pin 5 + Exposed Pad) | Power and signal ground | Must be connected to solid GND plane; exposed pad improves thermal performance and reduces EMI coupling paths. |
| FREQ (Pin 6) | Frequency programming | Accepts resistor-to-ground (e.g., 95kΩ for 1MHz); enables precise EMI mitigation and inductor size optimization. |
| BST (Pin 8) | Bootstrap supply | Charges external BST capacitor (typically 0.1µF) from VIN through internal PMOS; powers floating gate driver for high-side switch. |
Key Features
| Feature | Design Value |
|---|---|
| Ceramic capacitor stable | Eliminates need for tantalum or electrolytic output capacitors-reduces board area, improves reliability, and lowers ESR-related ripple. |
| Internal soft-start | 0.5ms ramp time prevents output overshoot and inrush current during power-up or fault recovery in sensitive loads. |
| Frequency foldback | Reduces switching frequency under light load or short-circuit to limit inductor current runaway and improve safety margin. |
| Thermal shutdown | Activates at 150°C with 20°C hysteresis-protects die during overload or poor heatsinking; resumes operation only after cooling below 130°C. |
| UVLO with hysteresis | 3.0V turn-on / 2.6V turn-off threshold prevents oscillation near brown-out conditions in automotive or unregulated supplies. |
Applications
| Automotive Infotainment Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powers display controller, audio codec, and CAN transceiver from 12V/24V vehicle battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing clean 3.3V/5V rail with fast load transient response. Use Value: 55V max input withstands load-dump spikes (ISO 7637-2 Pulse 5a); 2MHz operation avoids interference with AM/FM receivers. |
Use Scenario: Supplies isolated sensor interface and fieldbus communication ICs in factory automation cabinets. IC Role / Device Role / Timing Role: High-efficiency intermediate converter stepping down 48V backplane to 5V/3.3V logic rails. Use Value: 3.8V–55V input range accommodates wide industrial supply tolerances; 140µA quiescent current extends uptime during standby. |
| Battery-Powered Telematics Unit | Distributed Telecom Power System |
Use Scenario: Powers GPS module, cellular modem, and MCU in fleet-tracking devices operating from Li-ion or lead-acid packs. IC Role / Device Role / Timing Role: Main system regulator with enable-controlled sleep mode and low-noise output for RF-sensitive circuits. Use Value: 12µA shutdown current minimizes battery drain during GPS-inactive periods; ceramic-capacitor compatibility enhances long-term reliability. |
Use Scenario: Provides point-of-load conversion in 48V telecom equipment where space and thermal density are constrained. IC Role / Device Role / Timing Role: Compact 2A buck stage replacing discrete controllers + MOSFETs in distributed power architecture. Use Value: SOIC8E package with exposed pad achieves 2.5W power dissipation at TA=25°C-enables higher power density than standard SOIC8. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP4572DN-LF-Z | Successor with improved efficiency (96% vs 95%), lower RDS(on) (180mΩ), and enhanced thermal performance (θJA = 45°C/W). | Recommended for new designs requiring longer lifetime, tighter thermal margins, or higher efficiency at full load. | Select MP4572DN-LF-Z when designing new products-MP4560DN-LF-Z is not recommended for new designs per MPS documentation. |
| LM5164QDGQRQ1 | Automotive-grade (AEC-Q100), wider temp range (–40°C to +150°C), but fixed 2.1MHz frequency and no FREQ pin adjustment. | Suitable for safety-critical automotive ECUs where qualification and extended temperature operation are mandatory. | Choose LM5164QDGQRQ1 only if AEC-Q100 compliance and extended junction temperature are required; not drop-in compatible. |
Compared with MP4560DN-LF-Z, MP4572DN-LF-Z offers measurable improvements in conduction loss and thermal resistance while maintaining pin-to-pin compatibility, whereas LM5164QDGQRQ1 trades programmability and cost for automotive qualification and higher temperature capability-making it suitable only for specific qualified environments.
Availability
MP4560DN-LF-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC modules, and battery-powered telematics requiring stable component supply despite its "not recommended for new designs" status for legacy support and repair scenarios.
Supply support for MP4560DN-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 power ICs, with core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP4560 belongs to MPS's high-voltage buck converter product line, engineered for ruggedized operation in automotive, industrial, and telecom applications where wide input range and integrated power stages reduce bill-of-materials and layout complexity.
FAQ
Is MP4560DN-LF-Z pin-compatible with MP4572DN-LF-Z?
Yes-MP4572DN-LF-Z is a direct pin-to-pin and functionally compatible successor. Both use the same SOIC8E package, identical pinout, and share identical EN, FB, COMP, FREQ, and BST functionality. Layout reuse is supported, though minor compensation adjustments may optimize performance with the lower RDS(on).
What is the minimum off-time specification, and why does it matter?
The MP4560DN-LF-Z has a guaranteed minimum off-time of 100ns. This limits the maximum duty cycle achievable at high input voltages-for example, at VIN = 55V and VOUT = 5V, the theoretical max duty is ~9%, so minimum off-time constrains practical operation above ~10MHz-equivalent effective frequency. It also affects light-load pulse-skipping behavior and startup reliability.
Can MP4560DN-LF-Z operate with 100% duty cycle?
No-it cannot achieve true 100% duty cycle due to internal timing constraints and bootstrap capacitor recharge requirements. The minimum off-time (100ns) and need to refresh the BST capacitor during each switching cycle inherently enforce a maximum duty cycle less than 100%, typically ~95% depending on input/output voltage ratio and layout parasitics.
Why is an external Schottky diode required, and what specs are critical?
The MP4560DN-LF-Z is non-synchronous, so an external Schottky diode completes the power path during high-side switch off-time. Critical specs include reverse voltage rating > VINMAX (≥60V), average forward current ≥2A, and low forward voltage (<0.5V at 2A) to minimize conduction loss and thermal stress-e.g., Diodes Inc. B290-13-F (90V/2A) or CMSH2-100M (100V/2A).
How does the FREQ pin resistor value affect stability and EMI?
The FREQ pin resistor sets oscillator frequency linearly: fSW ≈ 100kHz × (100kΩ / RFREQ). Lower frequencies (e.g., 500kHz) improve light-load efficiency and ease EMI filtering but require larger magnetics; higher frequencies (e.g., 2MHz) shrink inductor/capacitor size but increase switching losses and demand stricter layout for BST capacitor placement and SW node routing.
Does MP4560DN-LF-Z support output voltages below 0.8V?
No-the internal feedback reference is fixed at 0.800V ±20mV, and the error amplifier is not designed for sub-0.8V regulation. Attempting to set VOUT < 0.8V violates the FB input common-mode range and results in loss of regulation. For sub-0.8V outputs, a different converter with adjustable reference or external reference injection is required.
What is the role of the exposed pad in the SOIC8E package?
The exposed pad on MP4560DN-LF-Z is electrically and thermally connected to GND. It must be soldered to a large PCB copper pour to achieve the specified θJA = 50°C/W and sustain 2.5W continuous power dissipation. Omitting thermal vias or isolating the pad degrades thermal performance and risks premature thermal shutdown under sustained 2A load.
MP4560DN-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) 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):
- 3.8V
- Voltage - Input (Max):
- 55V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 52V
- Current - Output:
- 2A
- Frequency - Switching:
- Up to 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MP4560DN-LF-Z FAQ
1.How can I place an order for MP4560DN-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4560DN-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 MP4560DN-LF-Z reliable?
The price and inventory of MP4560DN-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 MP4560DN-LF-Z is usually 5 days.
3.What payment methods are accepted for MP4560DN-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4560DN-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4560DN-LF-Z?
MP4560DN-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4560DN-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 MP4560DN-LF-Z?
For technical support, including MP4560DN-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4560DN-LF-Z requirements.
6.How does Aetrix verify that MP4560DN-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP4560DN-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 MP4560DN-LF-Z meets industry standards.
7.What is the process for return or replacement of MP4560DN-LF-Z?
All MP4560DN-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4560DN-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 MP4560DN-LF-Z part is unused and in its original packaging.
Return procedure for MP4560DN-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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