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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MP4560DN-LF-P

Name: MP4560DN-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MP4560DN-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP4560DN-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Datasheet:: MP4560DN-LF-P.pdf

Description:: IC REG BUCK ADJ 2A 8SOIC

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Product details

Overview

MP4560DN-LF-P 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 and adjustable 0.8V–52V output. It features current-mode control, internal soft-start, and 140μA quiescent current-designed for automotive power rails and industrial high-voltage point-of-load conversion.

For engineers reviewing the MP4560DN-LF-P datasheet, MP4560DN-LF-P pinout, MP4560DN-LF-P application, or MP4560DN-LF-P equivalent, key selection criteria include its 2MHz programmable oscillator, bootstrap capacitor charging constraints at high duty cycles, thermal shutdown threshold of 150°C, and SOIC8E package thermal resistance (θJA = 50°C/W).

Technical Context

The MP4560DN-LF-P 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 voltage clamped between 0.9V and 2.0V for loop stability.

It uses an external resistor on the FREQ pin to set switching frequency (e.g., 95kΩ → 1MHz typ), supports pulse-skipping mode under light load to reduce gate-driving loss, and relies on an external bootstrap capacitor between BST and SW pins-requiring ≥100ns minimum off time and careful PCB layout to maintain driver UVLO margin (>2.2V).

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.8V to 55V - supports direct connection to automotive battery (cold crank down to ~4V) and industrial 48V rails.
Output Current	2A continuous - limited by internal MOSFET R_DS(ON) (250mΩ typ) and package thermal dissipation (2.5W @ T_A=25°C).
Switching Frequency	Up to 2MHz - programmable via FREQ pin resistor; enables compact magnetics but requires attention to minimum on/off time (100ns each).
Feedback Reference	0.800V ±20mV - sets output voltage accuracy; used with external resistive divider for precise regulation from 0.8V to 52V.
Quiescent Current	140μA - enables >1-year battery life in always-on systems with low-duty-cycle wake-up (e.g., telematics ECU standby).
Shutdown Current	12–20μA - achieved by pulling EN < 0.3V; critical for energy harvesting and ultra-low-power sensor nodes.
Thermal Shutdown	150°C with 20°C hysteresis - protects against sustained overload or poor heatsinking in enclosed enclosures.

Pinout & Package

MP4560DN-LF-P is housed in an SOIC-8 with exposed pad (SOIC8E), providing enhanced thermal performance over standard SOIC8. The exposed pad must be soldered to a dedicated GND plane for optimal θ_JA (50°C/W) and θ_JC (10°C/W) performance.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 7)	Input supply rail	Supplies internal regulators and high-side switch; requires local 4.7μF ceramic decoupling to suppress switching noise.
SW (Pin 1)	Switch node	Drives external Schottky diode; high dv/dt demands tight layout to minimize EMI and bootstrap charging disruption.
EN (Pin 2)	Enable control	Positive logic input with 1.55V rising threshold; internal 1μA pull-up allows floating-enable operation.
FB (Pin 4)	Feedback input	Compares output voltage (via resistive divider) to 0.8V reference; high-impedance node sensitive to noise coupling.
COMP (Pin 3)	Error amplifier output	Drives external RC compensation network; voltage clamped 0.9–2.0V; determines loop bandwidth and phase margin.
FREQ (Pin 6)	Oscillator programming	Connects to ground via resistor (e.g., 95kΩ for 1MHz); tolerance directly impacts frequency accuracy and EMI profile.
BST (Pin 8)	Bootstrap supply	Charged from VIN through internal PMOS when SW is low; requires 0.1μF ceramic capacitor to SW for stable high-side gate drive.
GND (Pin 5)	Power and signal ground	Exposed pad must be connected to solid GND plane; separates noisy power return from sensitive analog ground paths.

Key Features

Feature	Design Value
Wide input range (3.8–55V)	Eliminates need for pre-regulator in 24V/48V industrial systems and 12V automotive applications with load dump tolerance.
Internal 250mΩ MOSFET	Reduces BOM count and layout area vs. external switch solutions; limits max output current to 2A without external heatsink.
Programmable 2MHz switching	Enables use of ≤10μH inductors and small ceramic capacitors-critical for space-constrained infotainment modules.
Ceramic capacitor stable	Supports low-ESR MLCCs without requiring tantalum or electrolytic bulk caps-improves reliability and temperature stability.
Internal soft-start (0.5ms)	Prevents output overshoot and inrush current during power-up; avoids tripping upstream fuses or causing bus droop.

Applications

Automotive Body Control Module

Industrial PLC I/O Power

Use Scenario: Powering microcontrollers, CAN transceivers, and sensor interfaces in door modules and lighting controllers.

IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator converting 12V battery rail; handles cold-crank (4.5V) and load-dump (60V transient) conditions.

Use Value: 55V absolute max input rating and UVLO hysteresis (0.35V) ensure uninterrupted operation during automotive transients without external protection.

Use Scenario: Generating isolated 15V and 5V rails for analog input conditioning and digital logic in modular I/O cards.

IC Role / Device Role / Timing Role: High-efficiency intermediate converter stepping down 48V backplane to 15V, feeding downstream LDOs or isolated DC/DCs.

Use Value: 2MHz operation reduces magnetic size and weight while maintaining >90% efficiency at 1A load-critical for dense DIN-rail mounted PLCs.

Distributed Telecom Power

Battery-Powered Test Equipment

Use Scenario: Local 3.3V/1.2V conversion for FPGA I/O banks and SerDes power in remote radio units (RRUs).

IC Role / Device Role / Timing Role: Point-of-load regulator powered from 48V telecom supply; operates in pulse-skipping mode during low-traffic sleep states.

Use Value: 140μA quiescent current extends standby time; frequency foldback prevents inductor saturation during startup into heavy capacitive loads.

Use Scenario: Portable oscilloscope front-end power management, where battery runtime and EMI sensitivity are critical.

IC Role / Device Role / Timing Role: Main 3.3V system rail converter from Li-ion (3.0–4.2V) or 9V alkaline stack; enabled only during active measurement.

Use Value: 12μA shutdown current and internal soft-start prevent battery voltage sag during turn-on-preserving ADC reference stability.

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 1.2A current limit accuracy (±6% vs ±15%), lower 85μA IQ, and enhanced bootstrap robustness at 2MHz.	Drop-in replacement for new designs; supports same SOIC8E footprint but requires updated compensation due to higher gm error amp.	Select for production ramp or long-term availability; not suitable for legacy MP4560 layout without validation.
LM5164QDGQRQ1	Automotive-grade (AEC-Q100), 1.5A, 65V input, integrated boot diode, and spread-spectrum EMI reduction.	Required for ASIL-B systems; adds functional safety diagnostics and wider temp range (–40°C to +150°C).	Select when automotive qualification or EMI certification (CISPR 25 Class 5) is mandatory.

Compared with MP4560DN-LF-P, MP4572DN-LF-Z offers tighter regulation and longer battery life in portable gear, while LM5164QDGQRQ1 adds automotive compliance and EMI hardening-making it preferable for vehicle-mounted instrumentation but over-specified for industrial bench equipment.

Availability

MP4560DN-LF-P is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, distributed telecom systems, and battery-powered test equipment requiring stable component supply and known-lifecycle support.

Supply support for MP4560DN-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 in the US, China, and Taiwan, and global distribution through authorized partners.

The MP4560 belongs to MPS's high-voltage buck converter product line, engineered for ruggedized power conversion in automotive, industrial, and telecom infrastructure where wide input range and thermal resilience are essential.

FAQ

What is the maximum recommended output current for MP4560DN-LF-P in SOIC8E package at 85°C ambient?

At T_A = 85°C, the SOIC8E package's thermal resistance (θ_JA = 50°C/W) limits continuous output current to approximately 1.3A. This assumes 12V input, 3.3V output, and adequate PCB copper area for the exposed pad. Exceeding this risks thermal shutdown activation above 125°C junction temperature.

Can MP4560DN-LF-P operate with 100% duty cycle?

No. The MP4560DN-LF-P requires minimum off-time (100ns) for bootstrap capacitor recharge. At input-to-output ratios near unity (e.g., 5V_IN/4.8V_OUT), the duty cycle approaches 96%, leaving insufficient time for BST capacitor replenishment-causing gate drive collapse and regulation failure.

Why does the datasheet specify "NOT RECOMMENDED FOR NEW DESIGNS"?

This designation reflects MPS's formal obsolescence path: MP4572 offers superior current limit accuracy, lower quiescent current, and improved bootstrap reliability at 2MHz. While MP4560DN-LF-P remains fully functional and supported, new designs should adopt MP4572DN-LF-Z for extended longevity and performance consistency.

Is an external bootstrap diode required for reliable 2MHz operation?

Yes-especially at high duty cycles (>75%) or elevated temperatures. The internal bootstrap charging path has limited current drive; adding a discrete Schottky diode (e.g., B290-13-F) from VIN to BST improves charge delivery and prevents UVLO dropout during sustained high-frequency switching.

How does frequency foldback improve light-load efficiency?

Frequency foldback reduces switching frequency proportionally to load current, lowering both switching losses (proportional to f_SW) and gate-driving losses (proportional to f_SW × V_GS²). At 10mA load, frequency drops to ~50kHz, cutting total loss by >60% versus fixed 2MHz operation-extending battery life in always-on sensors.

What is the minimum output capacitor ESR needed for stable operation?

The MP4560DN-LF-P is stable with zero-ESR ceramic capacitors. Unlike voltage-mode controllers, its current-mode architecture eliminates the need for intentional ESR to provide phase boost. However, output capacitance must meet ripple and transient response requirements-e.g., ≥22μF for 3.3V/2A operation per typical application guidelines.

MP4560DN-LF-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: MP

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:: 1MHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC-EP

MP4560DN-LF-P FAQ

1.How can I place an order for MP4560DN-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP4560DN-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 MP4560DN-LF-P reliable?

The price and inventory of MP4560DN-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 MP4560DN-LF-P is usually 5 days.

3.What payment methods are accepted for MP4560DN-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4560DN-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP4560DN-LF-P?

MP4560DN-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP4560DN-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 MP4560DN-LF-P?

For technical support, including MP4560DN-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4560DN-LF-P requirements.

6.How does Aetrix verify that MP4560DN-LF-P is sourced from the original manufacturer or authorized distributors?

All MP4560DN-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 MP4560DN-LF-P meets industry standards.

7.What is the process for return or replacement of MP4560DN-LF-P?

All MP4560DN-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4560DN-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 MP4560DN-LF-P part is unused and in its original packaging.

Return procedure for MP4560DN-LF-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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