My Inquiry
My Account
Monolithic Power Systems Inc. MP2482DN-LF-Z
- Part No.:
- MP2482DN-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2482DN-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 5A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:1,341
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2482DN-LF-Z from Monolithic Power Systems is a monolithic 5A, 30V step-down DC-DC converter with integrated 50mΩ high-side MOSFET, fixed 420kHz switching frequency, power-good indicator, and cycle-by-cycle over-current protection with hiccup mode. It delivers stable 3.3V@5A output for digital set-top boxes and flat-panel displays.
For engineers reviewing the MP2482DN-LF-Z datasheet, MP2482DN-LF-Z pinout, MP2482DN-LF-Z application, or MP2482DN-LF-Z equivalent, key selection criteria include input voltage range (4.5–30V), thermal performance in SOIC8E package, bootstrap capacitor requirements, PG threshold accuracy (0.74V ±50mV), and synchronization capability up to 1.5MHz.
Technical Context
The MP2482DN-LF-Z operates in fixed-frequency peak-current-mode control with internal 0.81V reference and 40× error amplifier gain. Its PWM cycle initiates on internal clock edges, and switch conduction terminates when sensed current reaches COMP-set threshold.
It integrates a floating high-side gate driver powered by an external bootstrap capacitor between SW and BST pins, with internal UVLO (2.2V rising) and regulated BST voltage clamping at 5V when VIN–VSW >5V. Thermal shutdown activates at 150°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 30V - supports wide industrial and consumer DC bus inputs including 5V, 12V, and 24V rails. |
| Output Current | 5A continuous - enables single-chip power delivery for high-current digital loads without external MOSFETs. |
| Switch RDS(ON) | 50mΩ - reduces conduction loss and thermal stress at full load, enabling >90% efficiency at 12VIN/3.3VOUT. |
| Switching Frequency | Fixed 420kHz - balances EMI, inductor size, and efficiency; synchronizable from 300kHz to 1.5MHz for noise-sensitive systems. |
| Feedback Reference | 0.808V typical (±20mV) - sets precise output voltage via resistor divider; enables 0.81V minimum adjustable VOUT. |
| Power Good Threshold | 0.74V rising (±40mV hysteresis) - provides reliable system-level power sequencing and fault detection for downstream logic. |
| UVLO Threshold | 4.1V rising / 3.2V falling - prevents erratic startup during brown-out conditions while ensuring clean enable/disable behavior. |
| Thermal Shutdown | 150°C activation - protects die integrity under sustained overload or poor PCB thermal design; recovers at ~140°C. |
Pinout & Package
MP2482DN-LF-Z uses the thermally enhanced 8-pin SOIC package with exposed pad (SOIC8E), optimized for high-power dissipation (θJA = 50°C/W on 4-layer PCB). The exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch Node Output | Drives external inductor; carries high di/dt switching current - requires short, low-inductance PCB routing. |
| 2 BST | Bootstrap Supply | Connects to SW via 0.1–1µF ceramic capacitor to generate floating gate drive voltage for high-side MOSFET. |
| 3 VCC | Bias Supply Input | Internally regulated 5V rail; requires 1µF ceramic decoupling to stabilize gate driver and analog circuitry. |
| 4 GND | Analog & Power Ground | Reference for FB and PG; must be isolated from high-current return paths to avoid noise coupling into regulation loop. |
| 5 FB | Feedback Input | Senses output voltage via resistor divider; internal 0.81V reference enables precise VOUT programming and foldback during short-circuit. |
| 6 PG | Power Good Open-Drain | Signals valid regulation (FB > 0.74V); requires external 100kΩ pull-up to VCC or VOUT for system power sequencing. |
| 7 EN/SYNC | Enable & Clock Sync | Active-high enable; also accepts external 300kHz–1.5MHz clock signal to synchronize switching and reduce EMI. |
| 8 IN | Main Input Supply | Accepts 4.5–30V unregulated input; requires local 22µF X5R/X7R ceramic capacitor to suppress high-frequency ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 50mΩ High-Side MOSFET | Eliminates external switch and driver, reducing BOM count and layout complexity for compact 5A buck designs. |
| Power-Good Indicator with Hysteresis | Enables reliable system reset and sequencing without external monitoring ICs; 40mV hysteresis prevents chatter near threshold. |
| Cycle-by-Cycle Over-Current Protection + Hiccup Mode | Prevents thermal runaway during sustained overload or output short; limits average fault current to safe levels for board survival. |
| Stable with Low-ESR Ceramic Output Capacitors | Supports X5R/X7R MLCCs only - eliminates need for electrolytic or tantalum capacitors, improving reliability and lifetime. |
| Internal Soft-Start Ramp | Generates controlled 0–1.2V SS ramp to prevent output overshoot during startup, eliminating need for external soft-start circuitry. |
| Thermally Enhanced SOIC8E Package | Exposed pad lowers θJA to 50°C/W - enables 5A operation without heatsink on standard 4-layer FR4 with adequate copper area. |
Applications
| Digital Set-Top Box Power | Flat Panel Display Logic Rail |
|---|---|
|
Use Scenario: Powers SoC, DDR memory, and video decoder ICs in cable/satellite STBs requiring clean 3.3V/5A under dynamic load transients. IC Role / Device Role / Timing Role: Primary non-synchronous buck regulator delivering main logic rail; handles 0–5A load steps with <100µs recovery. Use Value: Integrated MOSFET and current-mode control ensure stable regulation across 5–30V input variations common in field-deployed AC/DC adapters. |
Use Scenario: Supplies timing controller (TCON) and interface logic in LCD/LED TVs and monitors operating from 12V or 24V wall adapters. IC Role / Device Role / Timing Role: Fixed-frequency buck converter generating 3.3V or 5V system rail; synchronized to system clock to minimize display panel EMI. Use Value: PG pin directly interfaces with TCON enable input for coordinated power-up; hiccup mode prevents catastrophic failure during panel connector shorts. |
| Personal Video Recorder (PVR) Storage | Broadband Gateway Baseband |
|
Use Scenario: Powers SATA bridge controllers and NAND flash controllers in PVRs where thermal headroom is limited inside sealed enclosures. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with thermal shutdown and robust short-circuit protection for embedded storage subsystems. Use Value: SOIC8E package with exposed pad maintains junction temperature <125°C at 5A/12VIN with minimal PCB copper, reducing thermal design overhead. |
Use Scenario: Supplies baseband processor and PHY ICs in DOCSIS 3.0/3.1 cable modems and fiber ONUs requiring stable 1.8V or 3.3V rails. IC Role / Device Role / Timing Role: Synchronized buck converter operating at 1.2MHz to avoid interference with upstream/downstream RF bands. Use Value: EN/SYNC pin allows alignment with system master clock, suppressing conducted EMI peaks that could impair RF sensitivity or spectral mask compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2482DS-LF-Z | No exposed thermal pad; higher θJA = 90°C/W; lower max power dissipation (1.4W vs 2.5W). | Suitable only for <3A loads or forced-air-cooled environments; not recommended for 5A continuous in sealed enclosures. | Select MP2482DS-LF-Z only when board space excludes thermal pad connection or ambient temperature remains <50°C. |
| MPQ2482DN-AEC1 | Automotive-grade (AEC-Q100 Grade 1); same SOIC8E package but qualified for -40°C to +125°C junction operation. | Validated for automotive infotainment and ADAS camera modules; includes enhanced ESD and HTOL testing. | Choose MPQ2482DN-AEC1 for automotive programs requiring qualification evidence; otherwise, MP2482DN-LF-Z offers identical electrical performance at lower cost. |
Compared with MP2482DS-LF-Z, MP2482DN-LF-Z delivers 79% higher thermal power handling due to its exposed pad, making it the sole choice for 5A continuous operation in industrial or consumer enclosures. Against MPQ2482DN-AEC1, it trades automotive qualification for cost and lead-time advantage in non-automotive applications.
Availability
MP2482DN-LF-Z is available at Aetrix Electronics and suitable for digital set-top boxes, flat-panel television logic rails, personal video recorders, and broadband gateway baseband power supplies requiring stable component supply across multi-year production cycles.
Supply support for MP2482DN-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 mixed-signal ICs for power management, motion control, and interface applications.
The MP2482 belongs to MPS's high-current monolithic buck converter product line, designed specifically for cost-sensitive, space-constrained consumer and industrial systems needing 3–5A output without external MOSFETs or complex compensation.
FAQ
What is the minimum recommended input capacitance for MP2482DN-LF-Z at 5A output?
A 22µF X5R or X7R ceramic capacitor is specified for 5A applications. This value ensures low impedance at 420kHz, minimizes input voltage ripple, and limits surge current into the IC. Use parallel 10µF + 10µF + 2.2µF chips to achieve effective ESL reduction and maintain stability across temperature.
Can MP2482DN-LF-Z operate with an output voltage below 0.81V?
No. The internal reference is fixed at 0.81V, and the feedback comparator is not designed for sub-reference operation. Output voltages less than 0.81V cannot be regulated - attempting to set VOUT lower causes the error amplifier to saturate and disables proper PWM control.
Is an external bootstrap diode required for MP2482DN-LF-Z?
Not required, but recommended when duty cycle exceeds 65% (e.g., 5VIN → 3.3VOUT). An IN4148 from VOUT to BST improves bootstrap capacitor recharge efficiency, especially under light-load conditions, and helps sustain gate drive voltage during high-duty-cycle operation.
How does the hiccup mode function during output short-circuit?
When FB falls below 0.25V (30% of 0.81V), the oscillator frequency folds back and the IC enters hiccup mode: it attempts restart every ~20ms, limiting average short-circuit current to ~1.2A. This prevents thermal runaway and allows safe recovery once the fault is removed, without requiring manual reset.
What is the maximum allowable PCB trace length between BST and SW pins?
Trace length between BST and SW must be ≤3mm with minimum 0.3mm width. Longer traces increase parasitic inductance, causing BST voltage droop during switching transitions and risking high-side MOSFET turn-off failure or erratic operation.
Does MP2482DN-LF-Z support forced continuous conduction mode (FCCM)?
No. MP2482DN-LF-Z operates exclusively in discontinuous conduction mode (DCM) at light loads and transitions to continuous conduction mode (CCM) above ~1A. It lacks a dedicated FCCM pin or control register - no external circuit can force CCM operation across full load range.
What is the recommended land pattern for the SOIC8E exposed pad?
The recommended land pattern is a 3.51mm × 3.80mm thermal pad with 8–10 vias (0.3mm diameter, 0.6mm pitch) connecting to inner-layer ground planes. Avoid solder mask dams on the pad surface to ensure full thermal contact and mechanical adhesion during reflow.
MP2482DN-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:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 0.81V
- Voltage - Output (Max):
- 27V
- Current - Output:
- 5A
- Frequency - Switching:
- 420kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOICE
MP2482DN-LF-Z FAQ
1.How can I place an order for MP2482DN-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2482DN-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 MP2482DN-LF-Z reliable?
The price and inventory of MP2482DN-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 MP2482DN-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2482DN-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2482DN-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2482DN-LF-Z?
MP2482DN-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2482DN-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 MP2482DN-LF-Z?
For technical support, including MP2482DN-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2482DN-LF-Z requirements.
6.How does Aetrix verify that MP2482DN-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2482DN-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 MP2482DN-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2482DN-LF-Z?
All MP2482DN-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2482DN-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 MP2482DN-LF-Z part is unused and in its original packaging.
Return procedure for MP2482DN-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2482DN-LF-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
