MP2483DQ-LF-Z - 2.5A 55V White LED Driver Buck/Boost | MPS
MPN: MP2483DQ-LF-Z ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.72 | $17.20 |
| 100 | $1.34 | $134.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.86 | $860.00 |
| 5,000 | $0.69 | $3,450.00 |
MP2483DQ-LF-Z Overview
A white LED driver is a power management IC that converts a variable DC input into a regulated constant current suitable for driving one or more series-connected LEDs. The MP2483 belongs to the broader DC-DC converter family; within that family it sits in the LED driver sub-category, which adds current regulation, dimming interfaces, and thermal derating optimized for solid-state lighting rather than fixed voltage rails.
Key features of the MP2483 include a programmable switching frequency (set by an external resistor), a 200 mV low-side current-sense threshold, integrated 55V power MOSFET, and a separate reference-ground pin that enables direct dimming and/or enable control for positive-to-negative power conversion. The device also offers analog dimming via the CTRL pin and digital PWM dimming by driving that same pin with a duty-cycle signal.
Internally the MP2483 uses a current-mode control architecture with a high-side bootstrap switch driver and a peak current limit, giving it excellent line and load transient response for automotive and industrial lighting loads. The 55V maximum input withstands load-dump transients common on 12V/24V automotive buses, while the small 3x3 mm QFN footprint keeps the total solution size under 100 mm squared for space-constrained lamp heads.
Typical applications include MR16 / MR11 LED spotlights, architectural LED fixtures, automotive interior and exterior lighting, signage backlighting, and general-purpose constant-current LED drivers. The wide Vin range also makes the part suitable for 24V industrial lighting buses.
When designing with this part, keep the input capacitor close to the IN and PGND pins and route the LED string return through the low-side sense resistor for accurate current regulation. The CTRL pin must not be left floating - tie it to EN through a resistor divider or PWM source to guarantee known start-up behavior.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes that go well beyond the manufacturer datasheet cover sheet, helping engineers compare and select faster.
Drop-in alternatives for MP2483DQ-LF-Z — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MP2483DQ-LF-P
✅ Drop-In📋 Reference alternative (not in catalog)
MP2483DQ-LF
✅ Drop-In📋 Reference alternative (not in catalog)
MPQ2483ADS-LF
✅ Drop-In📋 Reference alternative (not in catalog)
MPQ2483DQ-LF
✅ Drop-In📋 Reference alternative (not in catalog)
MP2483HS
✅ Drop-In📋 Reference alternative (not in catalog)
MP2483DQ-LF-Z Maximum Ratings & Electrical Characteristics
| Product Type | White LED Driver IC |
| Topology | Step-Down (Buck), Inverting Step-Up/Down |
| Number of Outputs | 1 |
| Dimming Control | Analog and PWM (single CTRL pin) |
| Input Voltage Range | 4.5 V to 55 V |
| Maximum Input Voltage | 55 V |
| Peak Output Current | 2.5 A |
| Switching Frequency | Programmable (external resistor) |
| Current Sense Threshold | 200 mV (low-side) |
| Operating Temperature Range | -40 C to +85 C |
| Package | 10-QFN (3x3 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Reference Ground Pin | Yes (separate REF pin) |
| Internal MOSFET Rating | 55 V |
MP2483DQ-LF-Z Pin Configuration
| Pin 1 | BST — Bootstrap - connect to SW via 100 nF + diode for high-side drive |
| Pin 2 | IN — Input supply (4.5 V to 55 V) |
| Pin 3 | SW — Switch node - connect to inductor and BST diode |
| Pin 4 | GND — Power ground return for the internal MOSFET |
| Pin 5 | CS — Current sense input - low-side Rsense to GND |
| Pin 6 | REF — Reference ground / dimming return path |
| Pin 7 | CTRL — Analog and PWM dimming + enable (single pin) |
| Pin 8 | FREQ — Frequency programming - external resistor to GND |
| Pin 9 | COMP — Compensation network connection for the error amplifier |
| Pin 10 | EN — Enable input - logic high to turn on regulator |
Typical Applications
MP2483DQ-LF-Z is suitable for 7 applications: MR16 / MR11 LED Spotlight Retrofit Lamps, Automotive Interior and Exterior LED Lighting, Architectural and Commercial LED Downlights, LED Signage and Channel-Letter Backlighting, Industrial 24V LED Machine Lighting, Portable LED Flashlights and Task Lights, Display Backlight LED Strings.
MR16 / MR11 LED Spotlight Retrofit Lamps
The MP2483DQ-LF-Z is well matched to MR16 and MR11 LED retrofit lamps that must operate from rectified 12VAC or 12VDC rails. Its 4.5V to 55V input range comfortably handles the rectified AC peak while a 200 mV low-side current-sense threshold lets the designer regulate LED current with a single external resistor. The 10-QFN 3x3 footprint fits inside the small MR16 form factor without external heat sinking, and the combined analog/PWM CTRL pin enables the smooth dimming expected from halogen-replacement products. Per the MPS datasheet, switching frequency is programmable to push above the audible band so the lamp remains silent in dimmed operation.
Recommended
Automotive Interior and Exterior LED Lighting
The 55V maximum input rating and -40 C to +85 C operating range make the MP2483DQ-LF-Z an attractive fit for automotive interior and exterior LED lighting loads such as dome lights, reading lamps, and daytime running lights fed from the 12V or 24V vehicle bus. Per the MPS datasheet, the 55V rating absorbs typical ISO 7637 load-dump transients without additional TVS clamps in most layouts. The 2.5A peak output supports multi-LED strings, and the separate REF pin simplifies body-control-module PWM dimming for animation effects.
Recommended
Architectural and Commercial LED Downlights
Architectural LED downlights running from 24V constant-voltage rails benefit from the MP2483DQ-LF-Z because the part operates to 55V input while delivering 2.5A of regulated LED current, allowing one driver to power 7 to 10 series-connected 1W LEDs. The programmable switching frequency (set by a single resistor on the FREQ pin) lets designers pick a frequency above the AM band or balance efficiency against EMI margins for commercial dimming systems. The 10-QFN package keeps the driver footprint small enough to fit inside standard driver-can housings used in architectural can-light fixtures.
Recommended
LED Signage and Channel-Letter Backlighting
Signage and channel-letter backlighting modules typically run from 24V commercial supplies and demand a tightly regulated LED current to maintain uniform brightness across long runs. The MP2483DQ-LF-Z provides 2.5A output from up to 55V input with a single feedback loop controlling current sense, ensuring consistent luminance across modules even as supply voltage varies. The integrated 55V MOSFET eliminates the need for an external switch, shrinking the BOM and reducing thermal load in enclosed channel-letter cabinets where the part coexists with high-power LED arrays and limited airflow.
Recommended
Industrial 24V LED Machine Lighting
Factory-automation machines commonly use 24V LED work lights that must tolerate voltage transients on long cable runs and operate continuously in elevated ambient temperatures. The MP2483DQ-LF-Z supports the 24V industrial rail with up to 55V headroom, runs from -40 C to +85 C ambient, and integrates the 55V MOSFET so the designer can avoid noisy external switches in an EMI-sensitive cabinet. Combined analog-and-PWM dimming on the CTRL pin accepts either a 0-10V analog signal or a digital PWM stream from the machine controller, simplifying the interface to industrial PLCs.
Recommended
Portable LED Flashlights and Task Lights
For rechargeable battery-powered LED flashlights using 1 to 4 Li-ion cells (4.2V to 16.8V), the MP2483DQ-LF-Z provides constant-current LED regulation with high efficiency across the battery discharge curve. Per the MPS datasheet, its 4.5V minimum input operates directly from a single Li-ion cell, while the 2.5A capability drives high-current CREE-style LEDs at full brightness. The CTRL pin accepts a momentary pushbutton for dimming and on/off control, and the QFN-10 (3x3) footprint keeps the driver area under 10 mm squared - small enough to fit inside a handheld flashlight head.
Recommended
Display Backlight LED Strings
Large-format LCD displays and signage panels require high-current LED strings for uniform backlighting, often driven from a 12V or 24V supply. The MP2483DQ-LF-Z delivers up to 2.5A to drive long LED strings with a single driver, while its analog/PWM CTRL interface accepts PWM dimming directly from the display controller for synchronized brightness control. The programmable switching frequency (set by Rfreq) allows operation above 200 kHz to avoid interference with panel scan frequencies, and the integrated 55V MOSFET keeps the driver area compact inside the display chassis.
Recommended
Recommended Products Summary
Engineering reference data for MP2483DQ-LF-Z — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MP2483DQ-LF-P | MP2483DQ-LF | MPQ2483ADS-LF | MPQ2483DQ-LF | MP2483HS |
|---|---|---|---|---|---|---|
| Brand | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems |
| Package | 10-QFN (3x3 mm) | 10-QFN (3x3 mm) - same | 10-QFN (3x3 mm) - same | 10-QFN (3x3 mm) - same | 10-QFN (3x3 mm) - same | SOIC-14 - NOT pin-compatible (different package) |
| Input Voltage Max | 55 V | 55 V | 55 V | 55 V | 55 V | 55 V |
| Peak Output Current | 2.5 A | 2.5 A | 2.5 A | 2.5 A | 2.5 A | 2.5 A |
| Automotive Qualified | No | No | No | Yes (AEC-Q100) | Yes (AEC-Q100) | No |
| Switching Frequency | Programmable (external R) | Programmable (external R) | Programmable (external R) | Programmable (external R) | Programmable (external R) | Programmable (external R) |
| Dimming Control | Analog + PWM (single CTRL pin) | Analog + PWM (single CTRL pin) | Analog + PWM (single CTRL pin) | Analog + PWM (single CTRL pin) | Analog + PWM (single CTRL pin) | Analog + PWM (single CTRL pin) |
| Shipping Format | Tape & Reel (LF-Z) | Tube (LF-P) | No suffix specified | Tape & Reel | Tape & Reel | Tape & Reel (SOIC) |
Key Differentiators
- Smallest package in the MP2483 family with full feature parity (vs MP2483HS)
- Separate reference ground pin enables direct dimming without optocoupler (vs MP2483DQ-LF (no separate REF pin in some competing LED drivers))
- True 55V input withstands automotive load-dump without external TVS (vs LP8860-Q1 from Texas Instruments (rated to 42V only))
Design Notes
At VIN = 24 V driving a 10-LED string at 1 A (forward voltage ~30 V), the MP2483 dissipates approximately VIN minus VLED times I, so 0 W to a few watts depending on string voltage. In a boost-style configuration (VLED > VIN) the part delivers up to 2.5 A but the switching losses dominate. The QFN-10 (3x3) has a junction-to-ambient thermal resistance of approximately 50 C/W on a 1-oz 4-layer board per typical JEDEC EIA/JESD51 test conditions. Estimated: at 2 W dissipation, junction temperature rises 100 C above ambient, so copper-pour heatsinking on the exposed pad is required. Keep the SW trace short and use wide copper on the input capacitor return to minimize switching losses that turn into heat.
The MP2483 requires a tight PCB layout around the high-current loop formed by IN, the internal MOSFET, SW, the inductor, and PGND. Per the MPS evaluation board gerber, the input bypass capacitor (1 uF to 4.7 uF X7R ceramic) must be placed within 2 mm of pins 2 (IN) and 4 (GND). The bootstrap capacitor (typically 100 nF) and bootstrap diode must connect directly between pin 1 (BST) and pin 3 (SW) with traces shorter than 5 mm. Place the current-sense resistor (Rsense) directly at pin 5 (CS) with a short trace to pin 6 (REF) using Kelvin routing to avoid ground-loop errors in the LED current regulation.
Three common pitfalls with the MP2483: (1) leaving the CTRL pin floating causes indeterminate start-up behavior; always tie CTRL through a resistor divider or to the EN logic level. (2) Exceeding the 55V absolute-maximum input voltage (e.g., during automotive jump-start to ~16V nominal plus transients) can damage the internal MOSFET; verify with worst-case load-dump analysis. (3) Using an undersized inductor causes large ripple current that pushes the peak current limit and reduces LED current regulation accuracy; select L such that peak-to-peak ripple is less than 30% of nominal LED current per the MPS datasheet inductor-selection formula.
Keep noisy switching traces (SW node, BST) away from the analog CTRL and CS traces to avoid capacitively-coupled noise that disturbs current regulation. Use a 4-layer PCB stack-up with a continuous ground plane on layer 2 to minimize EMI and provide thermal spreading for the QFN-10 exposed pad. Star-ground the analog REF pin (pin 6) back to the low-side of the current-sense resistor rather than to the high-current power ground (pin 4) to avoid ground-bounce coupling into the current-sense signal.
Compliance Information
RoHS and REACH compliance inferred from MPS corporate policy and DigiKey listing data. Halogen-free status marked unknown because it was not explicitly stated in the verified web data. Non-automotive grade - choose MPQ2483 family for AEC-Q100 qualification.
