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Monolithic Power Systems Inc. MP2452DD-LF-Z
- Part No.:
- MP2452DD-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-TFDFN Exposed Pad
- Datasheet:
-
MP2452DD-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 1A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:19,055
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Product details
Overview
MP2452DD-LF-Z from Monolithic Power Systems is a 1A, 36V input, 1MHz non-synchronous step-down DC/DC converter with integrated 500mΩ high-side MOSFET, 0.794V feedback reference, and internal soft-start. It delivers up to 1A output at adjustable voltages from 0.794V to 33V and supports automotive-grade operation from –40°C to +85°C.
For engineers reviewing the MP2452DD-LF-Z datasheet, MP2452DD-LF-Z pinout, MP2452DD-LF-Z application, or MP2452DD-LF-Z equivalent, key selection criteria include its 3.3–36V wide input range, 3µA shutdown current for battery systems, frequency fold-back for startup safety, thermal shutdown protection, and QFN8 (2mm × 3mm) package compatibility with ceramic output capacitors.
Technical Context
The MP2452DD-LF-Z employs peak current-mode control with fixed 1MHz switching frequency and internal compensation, enabling stable regulation without external loop components. Its current-limit threshold is 1.2–1.5A, and it features cycle-by-cycle overcurrent protection with blanking during switch turn-on to reject noise.
Operation includes pulse-skipping mode at light load to reduce gate-driving and switching losses, achieving >90% efficiency across wide load ranges. The bootstrap driver charges via VIN–SW path and includes dedicated UVLO (2.4V rising threshold) to ensure reliable high-side gate drive under varying duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports direct connection to automotive battery rails (e.g., 12V/24V systems) without pre-regulation. |
| Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Switching Frequency | 1MHz (800–1200kHz typical) - enables compact magnetics and reduces output filter size vs. lower-frequency converters. |
| Feedback Reference | 0.794V ±1.7% - sets precise output voltage via external resistor divider; enables low-VOUT designs down to 0.794V. |
| Quiescent Current | 130µA (no load, switching) - minimizes standby power loss in always-on industrial or automotive modules. |
| Shutdown Current | 3µA - extends battery life in portable or remote-sensor applications requiring ultra-low-power sleep states. |
| Internal MOSFET RDS(on) | 500mΩ - limits conduction loss at 1A, supporting >90% peak efficiency with proper layout and component selection. |
Pinout & Package
The MP2452DD-LF-Z is housed in a thermally enhanced 2mm × 3mm QFN-8 package with exposed thermal pad, optimized for high-power-density PCB layouts and efficient heat dissipation in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | No Connect (NC) | Unbonded pins - must be left floating or tied to GND per layout best practice; no electrical function. |
| 2 | BST (Bootstrap) | Supplies gate drive for internal high-side MOSFET; requires 0.1µF ceramic capacitor between BST and SW for proper bootstrapping. |
| 3 | SW (Switch Node) | Drain of internal high-side MOSFET; connects directly to inductor and external Schottky diode cathode - critical high-dI/dt node. |
| 4 | VIN | Main input supply (3.3–36V); requires local 4.7µF ceramic decoupling capacitor placed adjacent to pin to suppress switching noise. |
| 5 | EN | Enable control input (1.2–1.8V rising threshold); HIGH-active logic; internally pulled down when floating - ensures default-off safety. |
| 6 | GND | Power and signal ground; exposed thermal pad must be soldered to large PCB copper area for thermal performance and EMI reduction. |
| 7 | FB | Feedback input referenced to 0.794V internal reference; connects to resistive divider from VOUT - determines output regulation accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates need for external compensation network - simplifies design, reduces BOM count, and improves layout robustness. |
| Stable with ceramic output capacitors | Supports low-ESR MLCCs only - avoids bulkier tantalum/electrolytic caps, reducing footprint and improving reliability. |
| Frequency fold-back at startup | Prevents inductor current runaway during soft-start by lowering switching frequency until regulation is established. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature and re-enables below ~135°C - protects against sustained overload or poor heatsinking. |
| UVLO with 0.4V hysteresis | Enables operation only above 2.7–3.2V VIN and prevents erratic behavior during brown-out conditions. |
Applications
| Automotive Body Control Module | Industrial Sensor Node Power |
|---|---|
|
Use Scenario: Powering CAN transceivers, LIN controllers, and temperature/humidity sensors in door modules or lighting ECUs. IC Role / Device Role / Timing Role: Primary 5V/3.3V point-of-load regulator converting raw 12V battery input with transient tolerance up to 36V. Use Value: 3.3–36V input range handles cold-crank (down to ~6V) and load-dump (up to 36V) events without external protection circuitry. |
Use Scenario: Supplying 3.3V to low-power wireless sensor transceivers (e.g., LoRaWAN, NB-IoT) deployed in factory-floor monitoring. IC Role / Device Role / Timing Role: Always-on buck converter operating in pulse-skipping mode during sleep intervals to extend battery life. Use Value: 3µA shutdown current and 130µA quiescent current enable multi-year operation on primary lithium thionyl chloride cells. |
| Distributed Power for PLC I/O | Medical Portable Diagnostic Device |
|
Use Scenario: Generating isolated 12V rail for analog front-end amplifiers and ADC drivers in modular programmable logic controller racks. IC Role / Device Role / Timing Role: Pre-regulator feeding downstream isolated DC/DC modules; operates at 1MHz to minimize magnetic interference with sensitive analog signals. Use Value: Fixed 1MHz frequency allows predictable EMI filtering and avoids conflict with communication bands used by fieldbus protocols. |
Use Scenario: Providing regulated 5V for microcontroller, display backlight, and USB charging circuitry in handheld ultrasound or glucose meters. IC Role / Device Role / Timing Role: Main system power supply with soft-start to prevent inrush current during battery insertion or hot-swap events. Use Value: Internal soft-start (0.5ms ramp) limits inrush to <1.5A, protecting battery contacts and preventing system reset during power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14010ADDA | 40V max input, 100kHz–2.5MHz adjustable frequency, external compensation required. | Lacks integrated soft-start and requires additional components for startup control; better suited for designs needing frequency synchronization. | Select when precise EMI shaping or spread-spectrum capability is needed - not drop-in compatible due to compensation and pinout differences. |
| TPS54202DDCR | 6V max input, 400kHz–2.5MHz frequency, integrated FET but limited to 6V VIN - no automotive input support. | Cannot replace MP2452DD-LF-Z in 12V/24V battery-fed systems due to insufficient input voltage rating. | Only viable in low-input-voltage applications (e.g., 5V rail conversion); unsuitable for automotive or industrial 12–36V inputs. |
Compared with LMR14010ADDA and TPS54202DDCR, the MP2452DD-LF-Z offers superior integration (internal compensation, soft-start, 36V rating) for cost-sensitive, space-constrained automotive and industrial buck designs where minimal external components and guaranteed startup behavior are critical.
Availability
MP2452DD-LF-Z is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, distributed PLC power, and portable medical diagnostics requiring stable component supply across extended temperature and voltage ranges.
Supply support for MP2452DD-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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP2452 belongs to MPS's high-voltage buck converter product line, designed specifically for ruggedized power delivery in automotive, industrial, and telecom infrastructure where wide input range, thermal resilience, and minimal external components are essential.
FAQ
What is the minimum input voltage required for MP2452DD-LF-Z to start switching?
The device enters regulation when VIN exceeds the UVLO rising threshold of 2.7–3.2V. Below this, the internal regulator remains inactive and no switching occurs. Startup is guaranteed once VIN crosses 3.0V nominal, with 0.4V hysteresis preventing oscillation near the threshold.
Can MP2452DD-LF-Z operate with an output voltage lower than 0.794V?
No. The internal feedback reference is fixed at 0.794V ±1.7%, and the FB pin compares the divided output voltage to this reference. Output voltages below 0.794V cannot be regulated - the lowest achievable output is exactly 0.794V when FB is connected directly to GND.
Is an external bootstrap diode required for reliable operation?
An external bootstrap diode (e.g., BAT54) is recommended when VIN ≤ 5V, VOUT = 3.3–5V, or duty cycle exceeds 65%. It ensures sufficient BST voltage during light-load pulse-skipping mode and improves gate-drive stability under high-duty-cycle conditions.
How does the MP2452DD-LF-Z handle short-circuit conditions?
It uses cycle-by-cycle current limiting with a 1.2–1.5A threshold. During sustained short-circuit, the device enters hiccup mode - shutting down after overcurrent detection, waiting ~500µs, then attempting restart - preventing thermal runaway while maintaining self-recovery capability.
What is the maximum allowable output capacitance for stable operation?
No absolute maximum is specified, but stability depends on ESR and capacitance value. With ceramic output capacitors, the MP2452DD-LF-Z is stable for ≥10µF. For tantalum or electrolytic types, ESR must be ≤30mΩ to avoid phase margin degradation - refer to Table 3 in the datasheet for exact compensation values.
Does the EN pin support logic-level interfacing with 3.3V microcontrollers?
Yes. The EN pin has a rising threshold of 1.2–1.8V and hysteresis of 0.3V, making it fully compatible with standard 3.3V GPIO outputs. Pulling EN to GND disables the part with 3µA shutdown current; leaving it floating also disables it via internal pull-down.
What thermal derating applies above +85°C ambient?
The device is rated for operation up to +85°C ambient. Above this, power dissipation must be reduced using θJA = 55°C/W: PD(MAX) = (150°C − TA)/55. At TA = 100°C, maximum continuous power drops to 0.91W - requiring reduced load current or improved PCB copper area to maintain safe junction temperature.
MP2452DD-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-TFDFN 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):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.794V
- Voltage - Output (Max):
- 33V
- Current - Output:
- 1A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (2x3)
MP2452DD-LF-Z FAQ
1.How can I place an order for MP2452DD-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2452DD-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 MP2452DD-LF-Z reliable?
The price and inventory of MP2452DD-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 MP2452DD-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2452DD-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2452DD-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2452DD-LF-Z?
MP2452DD-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2452DD-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 MP2452DD-LF-Z?
For technical support, including MP2452DD-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2452DD-LF-Z requirements.
6.How does Aetrix verify that MP2452DD-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2452DD-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 MP2452DD-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2452DD-LF-Z?
All MP2452DD-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2452DD-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 MP2452DD-LF-Z part is unused and in its original packaging.
Return procedure for MP2452DD-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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