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Monolithic Power Systems Inc. MP2560DN-LF-Z
- Part No.:
- MP2560DN-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2560DN-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 2.5A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:4,933
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Product details
Overview
MP2560DN-LF-Z from Monolithic Power Systems is a 2.5A, 4MHz, 42V 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–42V input, delivers adjustable output from 0.8V–39V, and achieves up to 93% efficiency in automotive and industrial power systems.
For engineers reviewing the MP2560DN-LF-Z datasheet, MP2560DN-LF-Z pinout, MP2560DN-LF-Z application, or MP2560DN-LF-Z equivalent, key selection criteria include its 120µA quiescent current for battery-powered operation, internal soft-start, frequency foldback for startup safety, thermal shutdown protection, and compatibility with ceramic output capacitors without external current-sense resistors.
Technical Context
The MP2560DN-LF-Z implements peak current-mode control with an internal error amplifier (200 V/V gain, 60 µA/V transconductance), enabling fast transient response and simplified loop compensation via the COMP pin. Its oscillator frequency is resistor-programmable (1.6–4.8 MHz) using the FREQ pin, with frequency foldback active during light-load and startup conditions to prevent inductor current runaway.
It integrates a bootstrap driver for the high-side MOSFET, requiring an external BST-to-SW capacitor; the floating driver features UVLO (2.2V threshold, 150mV hysteresis) and draws ~20µA quiescent current. The device uses internal soft-start (1.3 ms typical ramp time) and precision enable logic (1.5V rising threshold, 300mV hysteresis) for controlled power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 42V - supports wide-range industrial and automotive battery inputs including 12V, 24V, and 36V nominal systems. |
| Output Current | 2.5A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in compact embedded systems. |
| Switching Frequency | Up to 4MHz - enables use of small inductors and ceramic capacitors while avoiding AM radio and ADSL EMI bands. |
| Feedback Reference | 0.8V ±2.4% - allows precise output regulation down to 0.8V and up to 39V using standard resistor dividers. |
| Quiescent Current | 120µA - ensures minimal battery drain in always-on or low-power wake-up applications. |
| Internal MOSFET RDS(ON) | 220mΩ - reduces conduction losses and simplifies layout by eliminating external high-side switch. |
| Thermal Shutdown | 150°C with 15°C hysteresis - provides fault-tolerant operation under overload or poor heatsinking conditions. |
Pinout & Package
MP2560DN-LF-Z is housed in a thermally enhanced SOIC-8 package with exposed pad (pin 5), optimized for high-power density and efficient heat dissipation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch Node | Drives external Schottky diode; requires low-inductance routing to minimize voltage spikes and EMI. |
| 2 (EN) | Enable Input | Positive-logic control: >1.5V enables regulator; <1.2V disables with 12µA shutdown current. |
| 3 (COMP) | Compensation Node | Output of error amplifier; connects to RC network for loop stability tuning and transient response optimization. |
| 4 (FB) | Feedback Input | Senses output voltage via resistor divider; referenced to internal 0.8V bandgap for accurate regulation. |
| 5 (GND + Exposed Pad) | Power & Signal Ground | Primary return path for high-current switching; exposed pad must be soldered to large ground plane for thermal performance. |
| 6 (FREQ) | Frequency Programming | Connects to ground via resistor (e.g., 18kΩ for 4MHz); sets oscillator frequency with ±20% tolerance. |
| 7,8 (VIN) | Input Supply | Dual-pin configuration reduces trace inductance; requires local 10µF ceramic decoupling close to pins. |
| 8 (BST) | Bootstrap Supply | Supplies floating gate driver; requires 0.1µF ceramic capacitor between BST and SW for reliable high-side turn-on. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High-Side MOSFET | 220mΩ RDS(ON) eliminates external switch and associated gate drive complexity. |
| Programmable Switching Frequency | 1.6–4.8 MHz range enables optimization for size (high-freq) or efficiency (lower-freq at light load). |
| Internal Soft-Start | 1.3 ms typical ramp time prevents output overshoot and inrush current during power-up. |
| No External Current-Sense Resistor | Internally set current limit (2.9–3.5A) removes sensing resistor, saving board space and BOM cost. |
| Ceramic-Capacitor Compatible | Stable with low-ESR ceramic output caps - avoids bulkier tantalum/electrolytic solutions and improves reliability. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering 3.3V/5V logic rails in head-unit mainboards exposed to 12V–36V battery transients. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 3.3V to MCU, CAN transceivers, and display drivers. Use Value: 42V absolute max input rating and thermal shutdown withstand automotive load-dump events without latch-off. |
Use Scenario: Generating isolated 5V/12V rails for analog sensor front-ends and digital isolators in modular PLC backplanes. IC Role / Device Role / Timing Role: Non-isolated buck stage supplying auxiliary power to ADCs, DACs, and opto-coupled communication interfaces. Use Value: 4MHz operation minimizes inductor size (<10µH) while maintaining >90% efficiency across 10mA–2A load range. |
| Battery-Powered Telematics | Rail-to-Rail Industrial Sensor Hub |
Use Scenario: Long-life GPS/GSM tracking units powered by 3.6V Li-ion or 12V vehicle battery with sleep-mode requirements. IC Role / Device Role / Timing Role: Main system regulator enabling ultra-low-quiescent operation and fast wake-up from deep-sleep states. Use Value: 12µA shutdown current and 120µA operating IQ extend battery runtime beyond 5 years in periodic-reporting mode. |
Use Scenario: Multi-rail power management in distributed sensor nodes requiring 1.8V, 3.3V, and 5V from a single 24V field bus. IC Role / Device Role / Timing Role: First-stage buck converter stepping 24V down to 5V, feeding secondary LDOs or point-of-load converters. Use Value: Wide 4.5V–42V input range accommodates brownouts and surges on industrial 24V lines without external pre-regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | Lower 0.5A output current, fixed 2MHz frequency, no FREQ pin; smaller SOIC6 package. | Suitable only for low-power peripherals (e.g., UART buffers), not main system rails. | Select when footprint and cost are critical and load stays below 400mA. |
| LM5164QDDARQ1 | Automotive-grade (AEC-Q100), 1A output, 50V max input, integrated boot diode, higher 2.1mΩ RDS(ON). | Requires external boot diode; lacks programmable frequency but offers wider temp range (–40°C to +150°C). | Prefer for automotive safety-critical modules needing AEC-Q100 qualification and extended junction temperature. |
Compared with MP2560DN-LF-Z, MP2451DT-LF-Z trades output capability for size and cost, while LM5164QDDARQ1 adds automotive reliability at the expense of programmability and peak current capacity - making MP2560DN-LF-Z optimal for high-efficiency, high-current industrial and telematics designs where flexibility and thermal margin are prioritized.
Availability
MP2560DN-LF-Z is available at Aetrix Electronics and suitable for automotive infotainment power, industrial PLC I/O modules, and battery-powered telematics requiring stable component supply across extended temperature and voltage ranges.
Supply support for MP2560DN-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, LED drivers, and motor control.
The MP2560 belongs to MPS's high-voltage buck converter product line, designed specifically for robust, compact, and efficient power delivery in automotive, industrial, and battery-operated systems where wide VIN range and low IQ are essential.
FAQ
What is the minimum recommended output capacitor value for stable operation?
The MP2560DN-LF-Z is stable with ceramic capacitors as low as 10µF, provided they have adequate RMS current rating and low ESR. For 3.3V/2.5A operation, a 22µF X5R 1206 ceramic capacitor (e.g., TDK C3216X5R1E226M160AC) meets ripple and stability requirements per the datasheet's compensation guidelines.
Can MP2560DN-LF-Z operate with an input voltage below 4.5V?
No - the absolute minimum operating input voltage is 4.5V per the Recommended Operating Conditions table. Below this, UVLO prevents startup; the falling UVLO threshold is 2.6V, but functional regulation is not guaranteed below 4.5V due to insufficient headroom for internal regulators and gate drive.
How does frequency foldback improve startup reliability?
During startup, frequency foldback reduces switching frequency when inductor current approaches the current limit, preventing peak current runaway and excessive voltage overshoot. This avoids false triggering of overcurrent protection and ensures monotonic VOUT ramp-up even with undersized output capacitance.
Is the exposed pad on the SOIC8 package electrically connected to GND?
Yes - the exposed pad (pin 5) is internally tied to GND and must be soldered to a PCB ground plane. It serves both thermal dissipation (θJC = 10°C/W) and electrical grounding; leaving it unconnected degrades thermal performance and may cause instability or premature thermal shutdown.
What is the maximum allowable BST-to-SW voltage difference?
The BST-to-SW voltage must remain between –0.3V and +6V at all times. During normal operation, the bootstrap capacitor maintains ~5V across BST–SW. Exceeding +6V risks damaging the internal floating driver; exceeding –0.3V violates absolute maximum ratings and may cause erratic high-side switching.
Does MP2560DN-LF-Z require an external bootstrap diode?
No - the MP2560DN-LF-Z integrates a bootstrap regulator that charges the BST capacitor from VIN through an internal PMOS pass transistor. An external bootstrap diode is only needed in high-duty-cycle (>90%) applications where internal charging time is insufficient, per Application Note AN105.
How is the current limit threshold determined in practice?
The current limit is internally set and not user-adjustable; typical cycle-by-cycle limit is 3.2A (min 2.9A, max 3.5A) at room temperature. It is derived from the internal current-sense MOSFET and comparator threshold, and remains stable across input voltage and temperature per Electrical Characteristics Table.
MP2560DN-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):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 39V
- 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:
- 8-SOICE
MP2560DN-LF-Z FAQ
1.How can I place an order for MP2560DN-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2560DN-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 MP2560DN-LF-Z reliable?
The price and inventory of MP2560DN-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 MP2560DN-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2560DN-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2560DN-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2560DN-LF-Z?
MP2560DN-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2560DN-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 MP2560DN-LF-Z?
For technical support, including MP2560DN-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2560DN-LF-Z requirements.
6.How does Aetrix verify that MP2560DN-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2560DN-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 MP2560DN-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2560DN-LF-Z?
All MP2560DN-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2560DN-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 MP2560DN-LF-Z part is unused and in its original packaging.
Return procedure for MP2560DN-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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