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Monolithic Power Systems Inc. MPQ2451GT-33-P
- Part No.:
- MPQ2451GT-33-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-6
- Datasheet:
-
MPQ2451GT-33-P.pdf
- Description:
- IC REG BUCK 3.3V 600MA SOT23-6L
- Quantity:
- Payment:
- Shipping:
Inventory:2,504
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Product details
Overview
MPQ2451GT-33-P from Monolithic Power Systems is a 36V, 2.2MHz, 0.6A asynchronous step-down DC/DC converter with integrated high-side MOSFET, AEC-Q100 Grade 1 qualified, fixed 3.3V output, 3.3V–36V input range, and 130µA quiescent current-designed for automotive infotainment power rails.
For engineers reviewing the MPQ2451GT-33-P datasheet, MPQ2451GT-33-P pinout, MPQ2451GT-33-P application, or MPQ2451GT-33-P equivalent, this device supports high-frequency, low-quiescent-current buck conversion in space-constrained automotive modules where thermal robustness, UVLO hysteresis (0.4V), and internal soft-start (0.5–1ms) are critical selection criteria.
Technical Context
The MPQ2451GT-33-P implements current-mode control with peak-current PWM regulation at 2.2MHz ±20%, enabling compact external components. Its internal 500mΩ MOSFET and bootstrap driver support duty cycles up to ~92% while maintaining stable operation under pulse-skipping mode at light loads.
It integrates an error amplifier with RC compensation network referenced to VREF (1.2V), a 2.6V internal regulator powered across full VIN range, and dedicated EN pin with 1.35–1.8V enable threshold and 400mV hysteresis-enabling precise system-level power sequencing and fault recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3.6% (3.168–3.432V) over 3.3–36V input and −40°C to +125°C junction temp |
| Switching Frequency | 2.2MHz fixed (1.8–2.6MHz range); enables use of ≤3.3µH inductors and reduces EMI fundamental frequency |
| Max Output Current | 0.6A continuous load; cycle-by-cycle current limit set to 0.75A typical (0.65A min over temp) |
| Input Voltage Range | 3.3V to 36V; supports cold-crank (4.5V) and load-dump (36V) conditions per ISO 16750-2 |
| Quiescent Current | 130µA typical at no load; enables >1-year battery standby in always-on automotive modules |
| Shutdown Current | 1µA max; ensures minimal parasitic drain when EN pin pulled low |
| Thermal Shutdown | Activates at 150°C junction temperature; hysteresis ensures safe restart below 135°C |
Pinout & Package
MPQ2451GT-33-P is packaged in SOT23-6L (6-pin surface-mount) with exposed pad for thermal dissipation (θJA = 220°C/W on 4-layer PCB). Pin functions are validated per MPS datasheet Rev 1.0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 1) | Bootstrap supply | Charges floating gate driver via external 100nF capacitor to SW; requires ≥2.4V to enable high-side switch |
| GND (Pin 2) | Power ground | Reference for all internal circuitry; must connect output capacitor directly to minimize noise coupling |
| OUT (Pin 3) | Feedback sense | Internally connected to 3.3V divider tap; sets regulated output without external resistors |
| EN (Pin 4) | Enable control | Logic-high (>1.35V) enables operation; floating or <0.3V disables with 1µA shutdown current |
| VIN (Pin 5) | Main input supply | Accepts 3.3–36V; powers internal regulator and gate driver; requires local 10µF ceramic decoupling |
| SW (Pin 6) | Switch node | Drives external Schottky catch diode; high dv/dt node requiring short, wide trace routing |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation in automotive power systems |
| Internal soft-start | 0.5–1ms ramp time prevents output overshoot during cold-start and short-circuit recovery |
| Precision current limit | No external sense resistor required; cycle-by-cycle protection at 0.75A typical (±13% over temp) |
| Floating high-side driver | Integrated bootstrap regulator maintains ≥5V gate drive even at 92% duty cycle |
| UVLO with hysteresis | Rising threshold 2.7–3.29V, falling threshold 2.3–2.89V; 0.4V hysteresis prevents oscillation during brown-out |
Applications
| Automotive Infotainment | ADAS Camera Module |
|---|---|
Use Scenario: Powering USB-C hub and display interface ICs in head-unit systems with 12V battery input and cold-crank tolerance. IC Role / Device Role / Timing Role: Primary 3.3V rail generator with fast transient response to handle burst-mode video data transmission. Use Value: 2.2MHz switching avoids AM radio band interference; 130µA IQ extends battery backup runtime during ignition-off state. | Use Scenario: Supplying image signal processor (ISP) and MIPI serializer in rear-view camera modules exposed to engine bay temperatures. IC Role / Device Role / Timing Role: High-reliability point-of-load regulator delivering stable 3.3V under vibration, thermal cycling, and load dump transients. Use Value: AEC-Q100 Grade 1 rating and 150°C thermal shutdown ensure functional safety compliance per ISO 26262 ASIL-B requirements. |
| Industrial Telematics | Smart Rearview Mirror |
Use Scenario: Providing clean 3.3V power to LTE modem and GNSS receiver in fleet-tracking devices operating across 9–36V vehicle electrical systems. IC Role / Device Role / Timing Role: Input-range-flexible buck converter supporting wide VIN variation without external LDO post-regulation. Use Value: 3.3–36V input range eliminates need for pre-regulator stage; internal compensation simplifies layout for compact PCBs. | Use Scenario: Generating 3.3V for touch controller and display driver in automotive-grade smart mirrors with ambient temperature extremes. IC Role / Device Role / Timing Role: Low-noise, thermally robust DC/DC source enabling reliable capacitive touch sensing and OLED biasing. Use Value: Stable 3.3V output with ±3.6% tolerance ensures accurate ADC reference and consistent touch sensitivity across −40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ2451GT-33-AEC1 | Same die, identical electrical specs; differs only in tape-and-reel packaging and AEC-Q100 certification documentation | Qualified for production automotive programs requiring certified lot traceability and PPAP submission | Select when formal AEC-Q100 test reports and automotive-grade documentation are contractually required |
| TI TPS54202HDDCR | 2.2MHz sync buck, 0.5A, 4.5–28V input, 100µA IQ, but lacks AEC-Q100 qualification and 36V rating | Suitable for industrial or commercial 24V systems-not for automotive front-end or load-dump environments | Choose only for non-automotive designs needing synchronous rectification and slightly lower IQ |
Compared with MPQ2451GT-33-P, the MPQ2451GT-33-AEC1 offers identical performance with formal automotive qualification, while the TPS54202HDDCR trades 36V capability and AEC-Q100 for synchronous efficiency in lower-voltage industrial use cases.
Availability
MPQ2451GT-33-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial telematics requiring stable component supply, long-lifecycle availability, and AEC-Q100-compliant sourcing.
Supply support for MPQ2451GT-33-P 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.
The MPQ2451 product line delivers compact, AEC-Q100-qualified buck converters targeting automotive subsystems requiring high input voltage tolerance, low quiescent current, and robust thermal performance.
FAQ
What is the maximum allowable input voltage for MPQ2451GT-33-P?
The absolute maximum input voltage is +40V, but the recommended operating range is 3.3V to 36V per datasheet Rev 1.0. Operation above 36V risks violating the 36V specification used in AEC-Q100 stress testing and may reduce long-term reliability under load-dump conditions.
Does MPQ2451GT-33-P require external compensation components?
No. The MPQ2451GT-33-P features internally compensated control loop architecture, eliminating the need for external compensation networks. This simplifies PCB layout and improves stability across temperature and load variations without tuning.
Can MPQ2451GT-33-P operate with ceramic output capacitors only?
Yes. The device is explicitly characterized and guaranteed stable with ceramic output capacitors, including low-ESR types. No tantalum or electrolytic capacitors are required-enabling smaller footprint and improved reliability in automotive applications.
What is the purpose of the BST pin, and what capacitor value is recommended?
The BST pin supplies gate drive voltage to the internal high-side MOSFET via a bootstrap capacitor tied between BST and SW. A 100nF X7R ceramic capacitor placed adjacent to the IC is recommended to maintain sufficient gate voltage during high-duty-cycle operation.
How does the MPQ2451GT-33-P handle light-load efficiency?
Under light loads, it enters pulse-skipping mode-disabling switching cycles until output voltage droop triggers reactivation. This reduces gate-driving and switching losses, lowering quiescent current to 130µA and maintaining >85% efficiency down to 1mA load.
Is thermal shutdown latched or auto-recovering?
Thermal shutdown is auto-recovering: the device fully shuts down when junction temperature exceeds 150°C, then automatically resumes normal operation once die temperature falls below approximately 135°C, providing fault-tolerant protection without external reset circuitry.
What package variant does MPQ2451GT-33-P use?
MPQ2451GT-33-P uses the SOT23-6L package (6-pin, 2.9mm × 2.8mm × 1.3mm), with top marking "AGF", and includes an exposed thermal pad for enhanced heat dissipation in high-ambient automotive environments.
MPQ2451GT-33-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6L
MPQ2451GT-33-P FAQ
1.How can I place an order for MPQ2451GT-33-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2451GT-33-P 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 MPQ2451GT-33-P reliable?
The price and inventory of MPQ2451GT-33-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2451GT-33-P is usually 5 days.
3.What payment methods are accepted for MPQ2451GT-33-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2451GT-33-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2451GT-33-P?
MPQ2451GT-33-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2451GT-33-P 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 MPQ2451GT-33-P?
For technical support, including MPQ2451GT-33-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2451GT-33-P requirements.
6.How does Aetrix verify that MPQ2451GT-33-P is sourced from the original manufacturer or authorized distributors?
All MPQ2451GT-33-P 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 MPQ2451GT-33-P meets industry standards.
7.What is the process for return or replacement of MPQ2451GT-33-P?
All MPQ2451GT-33-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2451GT-33-P, 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 MPQ2451GT-33-P part is unused and in its original packaging.
Return procedure for MPQ2451GT-33-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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