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

Monolithic Power Systems Inc. MPQ2483ADQ-AEC1-Z

Name: MPQ2483ADQ-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ2483ADQ-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ2483ADQ-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 10-VFDFN Exposed Pad

Datasheet:: MPQ2483ADQ-AEC1-Z.pdf

Description:: IC REG DRIVER 10QFN

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Product details

Overview

MPQ2483ADQ-AEC1-Z from Monolithic Power Systems is an AEC-Q100 qualified 55V, 2.5A peak-current LED driver IC supporting buck and inverting buck-boost topologies with integrated 0.28Ω MOSFET, 0.198V current-sense reference, and combined EN/DIM analog+PWM dimming control - deployed in automotive headlamp modules and industrial LED signage requiring robust thermal shutdown, OVP, SCP, and open-string protection.

For engineers reviewing the MPQ2483ADQ-AEC1-Z datasheet, MPQ2483ADQ-AEC1-Z pinout, MPQ2483ADQ-AEC1-Z application, or MPQ2483ADQ-AEC1-Z equivalent, this page delivers verified package mapping (QFN-10, 3mm×3mm), validated pin functions including BST bootstrap and INGND-referenced dimming, confirmed AEC-Q100 Grade 1 qualification (−40°C to +125°C TJ), and real-world design meaning for RSET-programmable frequency (250 kHz–1.7 MHz) and cycle-by-cycle OCP.

Technical Context

The MPQ2483ADQ-AEC1-Z implements current-mode control with slope compensation for stable loop response across wide duty cycles (up to 90%), enabling fast transient recovery in dynamic LED load conditions. Its dual-reference architecture separates VSS (power return) from INGND (EN/DIM signal reference), allowing direct interface with negative-side dimming signals in buck-boost configurations without level-shifting circuitry.

Operation relies on a programmable oscillator tied to RSET (20kΩ–200kΩ), delivering 250 kHz–1.7 MHz switching with default 1.35 MHz when open. Protection logic integrates foldback frequency reduction during short-circuit events (OVP < 0.4V + FB < 0.1V) and thermal shutdown at 150°C, with OVP threshold set externally via resistor divider on pin 3.

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
Peak output current	2.5A - enables driving high-brightness LED strings up to 7×3W in buck-boost mode
Current-sense reference	0.198V ±2% - sets LED current accuracy via external sense resistor (e.g., 0.079Ω for 2.5A)
Switch R_DS(on)	0.28Ω - limits conduction loss to ≤1.75W at 2.5A, reducing heatsink requirements
Oscillator frequency	250 kHz–1.7 MHz - adjustable via RSET; higher frequencies allow smaller inductors (e.g., 1µH @ 1.35MHz)
Dimming interface	Single EN/DIM pin - 0.7–1.4V analog dimming or 100Hz–2kHz PWM with >1.4V amplitude
Protections	Cycle-by-cycle OCP, OVP (1.2V threshold), SCP, open-string detection, thermal shutdown - eliminates need for external fault monitoring

Pinout & Package

MPQ2483ADQ-AEC1-Z uses a thermally enhanced 10-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed VSS pad for low-θ_JA (50°C/W) and high-power dissipation (2.5W at T_A = 25°C).

Pin	Circuit Role	Design Meaning
1	VDD	Main supply input (4.5–55V); requires local 4.7µF ceramic capacitor to suppress switching noise
2	VSS	Power ground reference; connected to exposed pad; must be routed outside high-di/dt paths
3	OVP	Over-voltage protection sense node; sets shutdown threshold (1.2V) via external resistor divider
4	FB	Current feedback input; regulates LED current by holding voltage across sense resistor at 0.198V
5	COMP	Error amplifier output; connects to 1nF+ capacitor for loop stability and soft-start
6	RSET	Frequency programming node; resistor to VSS sets f_SW (250kHz–1.7MHz); 1nF bypass recommended
7	EN/DIM	Combined enable and dimming control; referenced to INGND; supports analog (0.7–1.4V) or PWM (>1.4V) dimming
8	INGND	Independent ground reference for EN/DIM; isolates dimming signal from power ground noise
9	BST	Bootstrap supply for high-side gate drive; requires 100nF ceramic capacitor between BST and SW
10	SW	Internal MOSFET drain output; connects to inductor and Schottky rectifier cathode

Key Features

Feature	Design Value
Buck/buck-boost topology support	Enables single-IC solutions for both step-down (e.g., 24V→12V LED string) and inverting step-up (e.g., 12V→−36V for negative-rail LED arrays)
AEC-Q100 Grade 1 qualification	Validated for −40°C to +125°C junction operation with lifetime reliability testing per automotive stress standards
Integrated 0.28Ω MOSFET	Eliminates external switch and associated gate-drive complexity while maintaining >85% efficiency at 2A output
Single-pin analog+PWM dimming	Reduces system BOM count and PCB space by merging enable, brightness control, and fault signaling into one INGND-referenced pin
Stable with low-ESR ceramics	Supports X5R/X7R MLCCs only - no electrolytic or tantalum required - improving long-term reliability in temperature-cycling environments

Applications

Automotive Headlamps

Industrial LED Signage

Use Scenario: Adaptive front-lighting systems (AFS) requiring precise current regulation across varying battery voltages (9–16V) and ambient temperatures (−40°C to +85°C).

IC Role / Device Role / Timing Role: Primary LED current controller in buck configuration, managing 4–6 high-power LEDs per channel with synchronized PWM dimming for dynamic beam shaping.

Use Value: AEC-Q100 qualification ensures compliance with automotive functional safety requirements; 55V rating accommodates load-dump transients up to 60V without external clamping.

Use Scenario: Outdoor digital billboards using 7-series 3W LEDs powered from 48V DC distribution rails with remote dimming commands.

IC Role / Device Role / Timing Role: Buck-boost LED driver operating in inverting mode to deliver regulated current to common-anode LED arrays referenced to chassis ground.

Use Value: INGND-referenced EN/DIM allows direct interface with PLC-based 0–10V analog dimming signals; OVP and open-string protection prevent field failures due to broken LED strings.

LCD Backlight Units

Emergency Lighting Systems

Use Scenario: High-brightness LCD displays in transportation HMI panels where EMI-sensitive analog video signals coexist with switching LED drivers.

IC Role / Device Role / Timing Role: Step-down LED driver with programmable 1.35MHz switching frequency to move noise spectrum above sensitive 1–10MHz video bandwidths.

Use Value: RSET-adjustable frequency avoids interference with display timing controllers; low 5μA shutdown current extends battery runtime during standby.

Use Scenario: UL924-compliant emergency egress lighting using constant-current LED modules powered from 12V backup batteries with automatic self-test cycles.

IC Role / Device Role / Timing Role: Primary LED driver with integrated open-string and short-circuit protection to meet fail-safe monitoring requirements during monthly/annual self-tests.

Use Value: Built-in foldback frequency during SCP reduces thermal stress during simulated fault conditions; thermal shutdown prevents battery over-discharge during prolonged test modes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ2483ADS-AEC1-Z	SOIC-14 package (θ_JA = 86°C/W vs. QFN's 50°C/W); same electrical specs and AEC-Q100 Grade 1 rating	Suitable for through-hole prototyping or legacy PCBs with SOIC footprints; lower power density than QFN	Select when thermal management via heatsinking is preferred over compact layout, or when hand-soldering is required
MPQ4425AGU-AEC1-Z	Higher 5A peak current, 60V rating, and integrated current-sense amplifier; lacks INGND-referenced dimming	Better suited for multi-string parallel LED arrays; requires external dimming circuitry	Choose for higher-power systems (>3A) where separate dimming control and enhanced fault reporting are acceptable trade-offs

Compared with MPQ2483ADS-AEC1-Z, the MPQ2483ADQ-AEC1-Z offers superior thermal performance in space-constrained automotive modules; versus MPQ4425AGU-AEC1-Z, it provides simpler dimming integration and lower BOM cost for single-string 2.5A applications.

Availability

MPQ2483ADQ-AEC1-Z is available at Aetrix Electronics and suitable for automotive lighting, industrial LED signage, LCD backlight units, and emergency lighting systems requiring stable component supply with AEC-Q100 compliance and long-term production continuity.

Supply support for MPQ2483ADQ-AEC1-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 solutions.

The MPQ2483A product line targets automotive and industrial LED lighting applications demanding high-voltage tolerance, integrated protection, and AEC-Q100 reliability - designed specifically for robust operation in harsh electrical and thermal environments.

FAQ

What is the maximum allowable input voltage for MPQ2483ADQ-AEC1-Z?

The absolute maximum VDD–VSS rating is 60V at 0°C ≤ T_J ≤ 125°C and 58V at −40°C ≤ T_J < 0°C. For continuous operation, the recommended input range is 4.5V to 55V. Exceeding 55V risks triggering OVP protection or degrading long-term reliability, even if within absolute max ratings.

How does the EN/DIM pin implement both analog and PWM dimming?

EN/DIM accepts a single voltage referenced to INGND: analog dimming occurs linearly between 0.7V and 1.4V (0–100% LED current), while PWM dimming requires a square wave ≥1.4V amplitude at 100Hz–2kHz. The IC internally decodes these modes - no external mode-select pins or configuration registers are needed.

Can MPQ2483ADQ-AEC1-Z drive LEDs in boost-only configuration?

No - the device supports buck (step-down) and inverting buck-boost (step-up/down with negative output) topologies only. It lacks a dedicated boost controller architecture (e.g., no dedicated diode drive or high-side switch control), and its internal switch is configured for low-side switching referenced to VSS.

What is the purpose of the separate INGND pin?

INGND provides an isolated ground reference for the EN/DIM pin, decoupling dimming control signals from high-di/dt power ground noise. This prevents false dimming commands or enable glitches caused by VSS voltage spikes during switching transitions - critical in buck-boost layouts where LED+ floats relative to chassis ground.

How is open-string protection implemented?

When an LED string opens, FB voltage drops near 0V. The controller increases duty cycle until OVP voltage (set by external divider) reaches 1.2V, triggering shutdown. Recovery occurs only after OVP falls below hysteresis (60mV), ensuring stable re-start without oscillation during intermittent faults.

Is RSET required for basic operation?

No - leaving RSET open configures the default 1.35MHz switching frequency. However, adding a resistor (20kΩ–200kΩ) allows optimization: lower frequencies (e.g., 250kHz) improve efficiency with larger inductors; higher frequencies reduce inductor size but increase switching losses.

Does MPQ2483ADQ-AEC1-Z require external compensation components?

Yes - a capacitor (≥1nF) must be placed between COMP and VSS to stabilize the error amplifier loop, enable PWM dimming functionality, and provide soft-start behavior. Omitting this capacitor causes instability, erratic dimming, or startup overshoot.

MPQ2483ADQ-AEC1-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:: -

Output Configuration:: -

Topology:: -

Output Type:: -

Number of Outputs:: -

Voltage - Input (Min):: -

Voltage - Input (Max):: -

Voltage - Output (Min/Fixed):: -

Voltage - Output (Max):: -

Current - Output:: -

Frequency - Switching:: -

Synchronous Rectifier:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-QFN (3x3)

MPQ2483ADQ-AEC1-Z FAQ

1.How can I place an order for MPQ2483ADQ-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ2483ADQ-AEC1-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 MPQ2483ADQ-AEC1-Z reliable?

The price and inventory of MPQ2483ADQ-AEC1-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2483ADQ-AEC1-Z is usually 5 days.

3.What payment methods are accepted for MPQ2483ADQ-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2483ADQ-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ2483ADQ-AEC1-Z?

MPQ2483ADQ-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ2483ADQ-AEC1-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 MPQ2483ADQ-AEC1-Z?

For technical support, including MPQ2483ADQ-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2483ADQ-AEC1-Z requirements.

6.How does Aetrix verify that MPQ2483ADQ-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ2483ADQ-AEC1-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 MPQ2483ADQ-AEC1-Z meets industry standards.

7.What is the process for return or replacement of MPQ2483ADQ-AEC1-Z?

All MPQ2483ADQ-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2483ADQ-AEC1-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 MPQ2483ADQ-AEC1-Z part is unused and in its original packaging.

Return procedure for MPQ2483ADQ-AEC1-Z:

1.Submit a request within 90 days.

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

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