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Monolithic Power Systems Inc. MP2498DV-LF-Z
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- Part No.:
- MP2498DV-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
MP2498DV-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 2A 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,689
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Product details
Overview
MP2498DV-LF-Z from Monolithic Power Systems is a 100V load dump-protected, 2A non-synchronous buck regulator with integrated high-side MOSFET (RDS(ON) = 250 mΩ), programmable 150 kHz–2 MHz switching frequency, and 120 µA quiescent current. It delivers adjustable 0.8 V–15 V output in automotive and industrial power systems where transient survivability up to 100 V/100 ms is required.
For engineers reviewing the MP2498DV-LF-Z datasheet, MP2498DV-LF-Z pinout, MP2498DV-LF-Z application, or MP2498DV-LF-Z equivalent, key selection criteria include its integrated 100 V overvoltage protection switch, cycle-by-cycle current limiting (3.2 A typ), thermal shutdown (150 °C), QFN28 (4 mm × 5 mm) thermal performance, and compatibility with ceramic-output-capacitor stability.
Technical Context
The MP2498DV-LF-Z implements current-mode PWM control with internal soft-start (0.5 ms ramp), precision 0.8 V feedback reference (±2.5% over temperature), and programmable oscillator via external resistor on FREQ pin. Its error amplifier features 400 V/V gain and 120 µA/V transconductance for loop compensation at COMP pin.
It integrates dual protection functions: a normally-on 100 V/0.5 Ω overvoltage protector between CTR and VDD for load dump suppression, and cycle-by-cycle current limiting with short-circuit foldback (50% current limit when FB ≈ 0 V). Bootstrap charging relies on external BST–SW capacitor and requires ≥100 ns minimum off time for reliable high-side gate drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5 V to 30 V - supports 12 V/24 V automotive battery rails with 90 V surge tolerance (100 ms). |
| Output Current | 2 A continuous - limited by internal MOSFET RDS(ON) (250 mΩ) and thermal design in QFN28 package. |
| Feedback Reference | 0.800 V ±2.5% - sets output voltage via external resistor divider; enables 0.8 V–15 V adjustment range. |
| Quiescent Current | 120 µA - enables low-power standby operation in battery-backed automotive modules. |
| Switching Frequency | 150 kHz to 2 MHz - programmable via FREQ pin resistor; higher frequencies reduce inductor size but require careful bootstrap timing. |
| Thermal Shutdown | 150 °C with 20 °C hysteresis - protects die during overload or poor PCB thermal layout; resumes operation at 130 °C. |
| Current Limit | 3.2 A typical - cycle-by-cycle peak current limit prevents MOSFET failure under overload or short-circuit conditions. |
Pinout & Package
The MP2498DV-LF-Z is housed in a thermally enhanced 28-pin QFN package (4 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad (Pin 4, GND) requiring direct connection to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, AGND | Analog Ground Reference | Reference node for FB, EN, COMP, FREQ; must be isolated from high-current return paths to avoid noise coupling. |
| 3, FREQ | Frequency Programming Input | Connects to ground via resistor (e.g., 78.7 kΩ for 1.2 MHz); sets oscillator frequency with ±20% tolerance over temperature. |
| 4, GND (Exposed Pad) | Power Ground & Thermal Path | Primary thermal dissipation path; must be soldered to large copper area and connected to output capacitor ground. |
| 7, 8, VDD | Buck Regulator Supply Rail | Powers internal control circuitry and bootstrap regulators; requires local 1 µF ceramic decoupling capacitor. |
| 10, CTR | Overvoltage Protection Control | Connects to Zener diode cathode; clamps VDD during load dump surges by activating integrated 100 V protection switch. |
| 18, IN (Exposed Pad) | Main Input Power Terminal | High-current input node; exposed pad must connect directly to VIN plane to handle 100 V transients and minimize inductance. |
| 20, BST | Bootstrap Supply for High-Side Driver | Charged via external capacitor to SW; supplies floating gate drive; requires ≥5 V headroom above SW for reliable turn-on. |
| 21, 22, SW | Switch Node | Drives external Schottky rectifier; high dV/dt node requiring tight layout and minimal trace length to reduce EMI. |
| 26, EN | Enable Control Input | Positive logic enable (1.55 V threshold); internal 1 µA pull-up allows floating-enable; supports system-level power sequencing. |
| 27, COMP | Error Amplifier Output | Compensation node for current-mode loop; accepts RC network to set pole-zero placement for stability across load/capacitance ranges. |
| 28, FB | Feedback Input | Compares output voltage (via resistive divider) against 0.8 V internal reference; determines regulation accuracy and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100 V Load Dump Protection | Eliminates need for external TransZorb and fuse in automotive 12 V/24 V systems subjected to ISO 7637-2 Pulse 5a (100 V/100 ms). |
| 250 mΩ Internal High-Side MOSFET | Reduces conduction loss and board space vs. discrete solutions; enables >95% peak efficiency at 2 A with proper thermal layout. |
| Ceramic Capacitor Stability | Supports low-ESR ceramic output capacitors without external compensation tweaks-simplifies BOM and improves reliability. |
| Programmable Switching Frequency (150 kHz–2 MHz) | Enables EMI optimization: lower frequencies improve light-load efficiency; higher frequencies shrink magnetics and filter size. |
| 120 µA Quiescent Current | Extends battery runtime in always-on automotive modules (e.g., telematics, infotainment standby) without compromising startup behavior. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module Supply |
|---|---|
|
Use Scenario: Powering 3.3 V/2 A core logic and memory in head-unit MCU subsystems exposed to cold-crank (6.5 V) and load dump (100 V) events. IC Role / Device Role / Timing Role: Primary step-down regulator with integrated surge protection; replaces discrete buck + TVS + fuse solution. Use Value: Single-chip 100 V survivability eliminates external protection components, reducing BOM count by ≥4 parts and PCB area by 35%. |
Use Scenario: Generating stable 5 V/2 A supply for analog sensor interfaces and digital isolators in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Main DC-DC converter handling wide-input industrial rails (18–30 V) with high ambient temperature (up to +85 °C). Use Value: 150 °C thermal shutdown and 120 µA quiescent current ensure reliable operation in unventilated enclosures while minimizing self-heating. |
| Distributed Battery Backup System | Linear Charger Auxiliary Supply |
|
Use Scenario: Providing regulated 1.8 V/2 A output for real-time clock and SRAM retention in vehicle black-box recorders with lithium backup. IC Role / Device Role / Timing Role: Low-IQ buck regulator maintaining output during main battery disconnect; soft-start prevents backup capacitor inrush. Use Value: 0.5 ms internal soft-start limits inrush current to <1.5× IOUT, preserving backup energy and enabling fast wake-up recovery. |
Use Scenario: Delivering 12 V/1.5 A bias supply to linear charger ICs (e.g., MCP73831) in portable diagnostic tools powered from 24 V vehicle sockets. IC Role / Device Role / Timing Role: Pre-regulator stepping down 24 V input to optimize linear charger efficiency and thermal margin. Use Value: Adjustable 0.8–15 V output allows precise matching to linear charger VIN requirements, reducing dropout loss by up to 40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP4322 | Successor device: 100 V input, 3 A output, 500 kHz–2.2 MHz frequency, 25 µA IQ, integrated LDO for bias rail. | Designed for next-gen automotive ADAS modules requiring lower IQ and higher current; lacks identical CTR-based load dump architecture. | Select MP4322 for new designs needing extended battery life and higher output capability; MP2498DV-LF-Z remains valid for legacy replacement. |
| LM5164QPWPRQ1 | TI part: 100 V input, 0.6 A output, 100 kHz–2.2 MHz, 15 µA IQ, synchronous rectification, no integrated OVP switch. | Requires external TVS/fuse for load dump; suited for low-power remote sensors rather than 2 A power rails. | Choose LM5164QPWPRQ1 only if output current ≤0.6 A and external protection is acceptable; not drop-in for MP2498's 2 A + OVP integration. |
Compared with MP4322, the MP2498DV-LF-Z offers proven 2 A load dump protection in production systems but higher quiescent current; versus LM5164QPWPRQ1, it delivers 3.3× more output current and eliminates external surge protection-critical for cost-sensitive 12 V automotive power nodes.
Availability
MP2498DV-LF-Z is available at Aetrix Electronics and suitable for automotive infotainment power, industrial PLC I/O module supply, and distributed battery backup systems requiring stable component supply through end-of-life transition support.
Supply support for MP2498DV-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 power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP2498 belongs to MPS's automotive-grade buck regulator product line, engineered specifically for robustness in harsh environments-emphasizing integrated transient protection, wide input range, and thermal resilience for under-hood and industrial deployments.
FAQ
What is the functional status of MP2498DV-LF-Z?
The MP2498DV-LF-Z is officially marked End-of-Life (EOL) by Monolithic Power Systems, with last-time-buy (LTB) availability confirmed through authorized distributors. Aetrix Electronics maintains active inventory and provides full EOL transition support, including cross-reference guidance to MP4322 and technical migration assistance for legacy designs.
Can MP2498DV-LF-Z operate with input voltages below 6.5 V?
No. The absolute minimum operating input voltage is 6.5 V per the Recommended Operating Conditions table. Below this, the internal UVLO (rising threshold 3.0 V) prevents startup, and the 2.6 V internal regulator cannot sustain control circuitry. Cold-crank testing must verify sustained ≥6.5 V at VIN during engine start.
How does the CTR pin function during load dump events?
The CTR pin connects to a Zener diode (e.g., 12 V) referenced to ground. During a 100 V load dump, the integrated 100 V/0.5 Ω protection switch activates between CTR and VDD, clamping VDD to ~12 V and diverting surge current away from the buck regulator's sensitive control circuitry-preserving functionality without external components.
Is an external Schottky diode mandatory for MP2498DV-LF-Z?
Yes. As a non-synchronous buck regulator, MP2498DV-LF-Z requires an external Schottky rectifier (e.g., CMSH2-100M, 100 V/2 A) connected from SW to GND. This diode conducts inductor current when the internal high-side MOSFET is off; omitting it causes catastrophic failure due to unclamped inductive kickback.
What is the minimum recommended output capacitance for stability?
Stability is maintained with ≥22 µF ceramic output capacitance (X5R/X7R, 1206 or larger) and ESR <10 mΩ. The datasheet confirms stable operation with 33 µF (e.g., TDK C3225X5R1E336M200AC), and compensation values in Table 3 assume this range. Lower capacitance risks instability under dynamic load steps.
Does MP2498DV-LF-Z support synchronous rectification?
No. MP2498DV-LF-Z is a non-synchronous buck controller with only an integrated high-side MOSFET. It requires an external Schottky diode for low-side conduction. Synchronous alternatives (e.g., MP4322) integrate both high- and low-side switches but are not pin-compatible replacements.
How is thermal performance affected by the exposed pad connection?
The exposed thermal pad (Pin 4, GND) reduces θJA from 50 °C/W to ≤35 °C/W when soldered to ≥4 cm² of 2-oz copper with ≥4 thermal vias. Inadequate pad connection raises junction temperature by >25 °C at 2 A load, triggering thermal shutdown prematurely-verified in thermal characterization reports.
MP2498DV-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 28-VFQFN 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):
- 6.5V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 15V
- Current - Output:
- 2A
- Frequency - Switching:
- 150kHz ~ 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (4x5)
MP2498DV-LF-Z FAQ
1.How can I place an order for MP2498DV-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2498DV-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 MP2498DV-LF-Z reliable?
The price and inventory of MP2498DV-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 MP2498DV-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2498DV-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2498DV-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2498DV-LF-Z?
MP2498DV-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2498DV-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 MP2498DV-LF-Z?
For technical support, including MP2498DV-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2498DV-LF-Z requirements.
6.How does Aetrix verify that MP2498DV-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2498DV-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 MP2498DV-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2498DV-LF-Z?
All MP2498DV-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2498DV-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 MP2498DV-LF-Z part is unused and in its original packaging.
Return procedure for MP2498DV-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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