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

Monolithic Power Systems Inc. MP2487DN-LF

Name: MP2487DN-LF
Brand: Monolithic Power Systems Inc.
SKU: MP2487DN-LF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP2487DN-LF

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

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

Datasheet:: MP2487DN-LF.pdf

Description:: IC REG BUCK PROG 1A 8SOICE

Quantity:: RFQ Add To RFQ list

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Inventory:4,926

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Product details

Overview

MP2487DN-LF from Monolithic Power Systems is a fixed-frequency, peak-current-mode controlled step-down LED driver IC integrating a 55V/1.5A high-side MOSFET to deliver up to 1A constant current to high-power LED strings. It operates from 4.5V–55V input, features 200mV reference voltage for precise current regulation, programmable switching frequency up to 200kHz via external resistor, and thermal shutdown protection. Used in automotive headlight modules and industrial high-bay lighting.

For engineers reviewing the MP2487DN-LF datasheet, MP2487DN-LF pinout, MP2487DN-LF application, or MP2487DN-LF equivalent, key selection criteria include input voltage range compatibility (4.5–55V), integrated MOSFET R_DS(ON) (220mΩ), 130μA quiescent current, SOIC8E thermal performance, and PWM dimming support with EN control.

Technical Context

The MP2487DN-LF implements peak-current-mode control with a 200mV internal reference, enabling accurate LED current regulation independent of input voltage or temperature drift. Its error amplifier delivers 400V/V gain and 350μA/V transconductance, with COMP pin clamped between 0.9V and 2.0V during operation.

Switching frequency is set externally via resistor from FREQ to GND (e.g., 495kΩ for 200kHz), and the bootstrap driver charges an external capacitor between BST and SW to sustain high-side gate drive. Thermal shutdown activates at 150°C with 20°C hysteresis, and UVLO engages at 3.0V rising threshold with 0.4V hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 55V - supports 12V/24V/48V automotive and industrial rails without pre-regulation
LED Output Current	Up to 1A - regulated via external sense resistor connected to FB pin with 200mV reference
Integrated MOSFET	55V V_DS, 220mΩ R_DS(ON) - eliminates external switch, reduces BOM count and layout area
Switching Frequency	Programmable up to 200kHz - enables EMI optimization and inductor size reduction
Quiescent Current	130μA - ensures low standby power in always-on lighting systems
Thermal Shutdown	150°C activation with 20°C hysteresis - prevents permanent damage during overload or poor heatsinking
Enable Threshold	1.5V rising, 1.2V falling - supports clean logic-level control with 300mV hysteresis for noise immunity

Pinout & Package

The MP2487DN-LF is housed in a thermally enhanced SOIC8E package with exposed pad for improved heat dissipation. The exposed pad must be soldered to a PCB ground plane to achieve θ_JA = 50°C/W and maintain junction temperature below 125°C under full load.

Pin/Terminal	Circuit Role	Design Meaning
1 SW	Switch Node	Drain of internal high-side MOSFET; connects to cathode of external Schottky diode and inductor
2 EN	Enable Input	Positive-logic control pin; floating or >1.5V enables operation; <1.2V forces shutdown mode
3 COMP	Compensation Node	Error amplifier output; external RC network sets loop stability and transient response
4 FB	Current Sense Input	Connects to LED string sense resistor; compared against 200mV internal reference for current regulation
5 GND	Ground / Exposed Pad	Power and signal return; exposed pad must be tied to large copper area for thermal management
6 FREQ	Frequency Programming	Resistor-to-ground sets oscillator frequency; 495kΩ yields 200kHz switching
7 VIN	Main Supply Input	4.5–55V input rail; requires local ceramic decoupling capacitor near pin
8 BST	Bootstrap Supply	Charges external capacitor to ~4V relative to SW; powers floating gate driver for high-side MOSFET

Key Features

Feature	Design Value
Ceramic capacitor stable	Supports low-ESR ceramic input/output capacitors without oscillation risk due to current-mode control architecture
Internal soft-start	0.18ms ramp time prevents LED current overshoot during startup and short-circuit recovery
200mV reference voltage	Minimizes I²R loss in current-sense resistor, improving efficiency especially at high LED currents
12µA shutdown current	Enables battery-powered emergency lighting applications with multi-week standby life
Peak current limit	1.5A cycle-by-cycle limiting protects internal MOSFET during output short or inductor saturation

Applications

Automotive Headlamp Driver

Industrial High-Bay Lighting

Use Scenario: Driving 10-series white LEDs (33V total) from 12V/24V vehicle battery with PWM dimming.

IC Role / Device Role / Timing Role: Constant-current buck regulator with EN-controlled on/off and FREQ-set 150kHz switching to avoid AM band interference.

Use Value: Delivers 330mA with ±3% current accuracy across -40°C to +85°C ambient, supporting ASIL-B functional safety requirements via thermal shutdown and UVLO.

Use Scenario: Powering 40W LED arrays in warehouse ceiling fixtures powered by 48V DC distribution bus.

IC Role / Device Role / Timing Role: Primary LED current controller using external 287mΩ sense resistor and 495kΩ frequency programming resistor.

Use Value: Achieves 97.5% peak efficiency at 44V input/330mA output, reducing thermal load and enabling compact aluminum housing design.

Streetlight LED Module

UV-C Disinfection System

Use Scenario: Outdoor pole-mounted luminaire operating from solar-charged 48V battery bank with wide temperature swing.

IC Role / Device Role / Timing Role: Robust LED driver with 55V max input tolerance, thermal shutdown, and 130μA quiescent current for dusk-to-dawn operation.

Use Value: Maintains stable 700mA output over 4.5–55V input range and -40°C to +85°C, eliminating need for input pre-regulator.

Use Scenario: Driving high-voltage UV-C LED strings (36V @ 500mA) in portable sterilization devices with battery backup.

IC Role / Device Role / Timing Role: Precision current source with fast transient response enabled by 200mV reference and peak-current-mode control.

Use Value: Enables accurate dose control via analog dimming through COMP pin, critical for germicidal efficacy compliance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage LED driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM3409HVMM/NOPB	4.5–75V input, 1.25A switch, 200mV ref, but requires external MOSFET and has higher 2.5mA quiescent current	Lacks integrated switch; suited for designs requiring >1A or custom FET selection	Choose when higher current (>1A) or discrete FET optimization is required; adds complexity and board space
AL8862SP-13	5–60V input, 1A, 200mV ref, integrated MOSFET, but only 100kHz max frequency and no programmable FREQ pin	No frequency tuning; limited EMI mitigation capability in sensitive RF environments	Choose for cost-sensitive, fixed-frequency applications where 200kHz flexibility is unnecessary

Compared with LM3409HVMM/NOPB and AL8862SP-13, the MP2487DN-LF uniquely combines 55V/1A integrated switching, 200kHz programmability, and 130μA quiescent current in SOIC8E-making it optimal for space-constrained, thermally demanding, and EMI-sensitive LED systems.

Availability

MP2487DN-LF is available at Aetrix Electronics and suitable for automotive lighting, industrial high-bay fixtures, and outdoor streetlight systems requiring stable component supply and long-term production continuity.

Supply support for MP2487DN-LF 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, LED lighting, and motor control.

The MP2487 belongs to MPS's high-voltage LED driver product line, designed specifically for robust, efficient, and compact constant-current solutions in automotive, industrial, and architectural lighting where wide input range and thermal resilience are critical.

FAQ

What is the maximum recommended LED string voltage for MP2487DN-LF?

The MP2487DN-LF supports output voltages up to VIN – (V_F of external Schottky diode), typically allowing up to ~50V LED string voltage with 55V input. For reliable operation, keep peak inductor current below 1.5A and ensure thermal limits are met using the SOIC8E exposed pad.

Can MP2487DN-LF be used with PWM dimming?

Yes - MP2487DN-LF supports direct PWM dimming via the EN pin. Applying a logic-level PWM signal (200Hz minimum, 50% duty cycle typical) to EN achieves flicker-free dimming without altering current regulation accuracy or efficiency.

Why does the BST pin require an external capacitor?

The BST capacitor provides charge storage for the floating gate driver of the internal high-side MOSFET. It must be placed directly between BST and SW pins (typically 0.1μF ceramic) to maintain ~4V bootstrap voltage during high-duty-cycle operation and prevent driver undervoltage shutdown.

How is LED current accuracy affected by temperature?

LED current regulation remains within ±3% over -40°C to +85°C due to the precision 200mV reference (±6% over temp) and matched internal resistors. External sense resistor drift dominates overall error; use 0.5% tolerance, 50ppm/°C metal film resistors for best accuracy.

Is an external bootstrap diode necessary?

An external bootstrap diode (e.g., BAT54) from a stable 5V rail to BST is recommended only when VIN ≤ 5V or V_OUT is 3.3–5V - conditions where internal charging from VIN may be insufficient. In standard 12–48V applications, the internal bootstrap circuit suffices.

What failure protections are built into MP2487DN-LF?

The device integrates thermal shutdown (150°C activation), input UVLO (3.0V rising threshold), cycle-by-cycle current limiting (1.5A), and bootstrap UVLO (2.2V). All protections trigger graceful shutdown with automatic recovery upon fault removal, ensuring system reliability without external supervision circuits.

MP2487DN-LF Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

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

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Programmable

Number of Outputs:: 1

Voltage - Input (Min):: 4.5V

Voltage - Input (Max):: 55V

Voltage - Output (Min/Fixed):: -

Voltage - Output (Max):: -

Current - Output:: 1A

Frequency - Switching:: 200kHz

Synchronous Rectifier:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOICE

MP2487DN-LF FAQ

1.How can I place an order for MP2487DN-LF through Aetrix?

Please submit a Request for Quotation (RFQ) for MP2487DN-LF 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 MP2487DN-LF reliable?

The price and inventory of MP2487DN-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2487DN-LF is usually 5 days.

3.What payment methods are accepted for MP2487DN-LF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2487DN-LF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP2487DN-LF?

MP2487DN-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP2487DN-LF 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 MP2487DN-LF?

For technical support, including MP2487DN-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2487DN-LF requirements.

6.How does Aetrix verify that MP2487DN-LF is sourced from the original manufacturer or authorized distributors?

All MP2487DN-LF 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 MP2487DN-LF meets industry standards.

7.What is the process for return or replacement of MP2487DN-LF?

All MP2487DN-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP2487DN-LF, 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 MP2487DN-LF part is unused and in its original packaging.

Return procedure for MP2487DN-LF:

1.Submit a request within 90 days.

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

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