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Monolithic Power Systems Inc. MPQ2451GT-5-P
- Part No.:
- MPQ2451GT-5-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-6
- Datasheet:
-
MPQ2451GT-5-P.pdf
- Description:
- IC REG BUCK 5V 600MA SOT23-6L
- Quantity:
- Payment:
- Shipping:
Inventory:1,238
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Product details
Overview
MPQ2451GT-5-P from Monolithic Power Systems is a 36V, 2.2MHz, 0.6A asynchronous step-down DC/DC converter with integrated high-side MOSFET (500mΩ RDS(ON)), fixed 5V output, AEC-Q100 Grade 1 qualification, and 130µA quiescent current - designed for automotive power rails including infotainment, ADAS sensors, and body control modules.
For engineers reviewing the MPQ2451GT-5-P datasheet, MPQ2451GT-5-P pinout, MPQ2451GT-5-P application, or MPQ2451GT-5-P equivalent, this device delivers precision current limiting without external sense resistors, internal soft-start, frequency fold-back for safe start-up, thermal shutdown protection, and stable operation with ceramic output capacitors in SOT23-6L packaging.
Technical Context
The MPQ2451GT-5-P implements peak-current-mode control with an internal transconductance error amplifier (GCS = 3 A/V) and fixed 2.2MHz oscillator, enabling fast transient response and minimal external compensation. Its bootstrap-driven high-side gate driver supports up to 36V input while maintaining regulated 5V output across −40°C to +125°C junction temperature.
It operates in PWM mode under medium-to-heavy loads and transitions to pulse-skipping mode at light loads to sustain >90% efficiency down to µA-level output currents. UVLO thresholds (2.7V rising / 2.3V falling) and EN pin logic (1.35–1.8V enable threshold) ensure robust startup and controlled sequencing in automotive battery systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports direct connection to automotive battery (cold-crank down to 3.3V) and industrial 24V rails. |
| Output Voltage | Fixed 5V ±2% - eliminates external feedback resistors and simplifies layout for USB-powered peripherals and MCU I/O rails. |
| Switching Frequency | 2.2MHz ±20% - enables use of compact 2.2–4.7µH inductors and reduces EMI fundamental below AM band. |
| Max Output Current | 0.6A continuous - sufficient for powering microcontrollers, CAN transceivers, and small displays in space-constrained modules. |
| Quiescent Current | 130µA - enables always-on functionality in vehicle access systems without excessive battery drain. |
| Internal MOSFET RDS(ON) | 500mΩ @ VBST−VSW = 5V - minimizes conduction loss at 0.6A, supporting >90% peak efficiency at 12V→5V conversion. |
| Thermal Shutdown | 150°C - provides fault-tolerant operation during overload or poor PCB heatsinking in sealed enclosures. |
Pinout & Package
SOT23-6L package with exposed pad (thermal performance θJA = 220°C/W on 4-layer PCB); 2mm × 2.9mm footprint compatible with standard pick-and-place equipment and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Drives high-side MOSFET gate; requires 100nF capacitor between BST and SW to sustain gate voltage during high-duty-cycle operation. |
| GND | Power ground | Reference for all internal circuitry and output capacitor return; must be connected near output capacitor to minimize noise coupling. |
| OUT | Feedback node | Internally tied to 5V divider tap - no external resistor network needed; connects directly to output capacitor positive terminal. |
| EN | Enable control | Logic-high (>1.35V) enables regulation; floating or <0.3V disables with 1µA shutdown current - supports system-level power sequencing. |
| VIN | Main input supply | Accepts full 3.3–36V range; requires local 10µF ceramic decoupling to suppress switching transients. |
| SW | Switch node | Drains high-side MOSFET; connects to inductor and Schottky catch diode cathode - critical for EMI control and layout integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | 500mΩ RDS(ON) eliminates external switch and reduces BOM count by one active component. |
| Precision current limit | 0.75A typical cycle-by-cycle limit without external sense resistor - improves reliability and simplifies overcurrent protection design. |
| Internal soft-start | 0.5–1ms ramp time prevents output overshoot and inrush current during cold-start in automotive environments. |
| Stable with ceramic capacitors | No ESR requirement for output capacitor - enables use of low-profile, high-reliability X7R/X5R MLCCs instead of tantalum. |
| AEC-Q100 Grade 1 | Qualified for −40°C to +125°C operation - meets automotive electronics stress testing requirements for engine bay and cabin applications. |
Applications
| Infotainment Power Rail | ADAS Camera Module |
|---|---|
Use Scenario: Supplies clean 5V power to touchscreen controllers and audio codecs in head units operating from 9–16V battery with load dump transients. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5V with fast line/load transient response to maintain display stability during ignition events. Use Value: 2.2MHz switching avoids interference with AM/FM radio bands; 130µA IQ enables low-power standby mode for voice wake-up circuits. | Use Scenario: Powers image sensor and ISP in rear-view or surround-view cameras mounted in exterior housings subject to wide ambient temperature swings. IC Role / Device Role / Timing Role: Fixed-output step-down converter providing stable 5V rail with thermal shutdown and UVLO to survive cold-crank and hot-soak conditions. Use Value: AEC-Q100 Grade 1 qualification ensures functional safety compliance; internal compensation reduces layout sensitivity in compact camera PCBs. |
| Body Control Unit (BCU) | Telematics Control Unit (TCU) |
Use Scenario: Generates 5V for door module MCUs and LIN transceivers in centralized body electronics architecture with shared 12V distribution. IC Role / Device Role / Timing Role: High-input-voltage buck converter handling battery transients up to 36V during jump-start or alternator load dump. Use Value: 36V absolute max input rating and 40V transient tolerance protect against ISO 7637-2 Pulse 5a; SOT23-6L footprint saves board area in multi-rail power modules. | Use Scenario: Provides always-on 5V supply to cellular modem and GNSS receiver in vehicle connectivity modules requiring low quiescent current during sleep states. IC Role / Device Role / Timing Role: Low-IQ buck regulator enabling <10µA system sleep current when paired with enable-controlled downstream LDOs. Use Value: 1µA shutdown current and 130µA operating IQ extend battery backup runtime during ignition-off periods without compromising start-up speed. |
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-5-AEC1 | Same silicon, AEC-Q100 Grade 1 certified with full automotive qualification documentation and traceability. | Required for production automotive programs needing PPAP submission and long-term supply assurance. | Select when automotive OEM compliance mandates full AEC-Q100 certification beyond Grade 1 electrical specs. |
| TI TPS54202DRCT | 2.2MHz synchronous buck; 4.5–28V input; 5V fixed output; 2A capability; higher IQ (45µA) but no AEC-Q100 rating. | Suitable for industrial or commercial 5V point-of-load where automotive qualification is not required. | Choose for higher current margin (2A vs 0.6A) and synchronous efficiency, but only in non-automotive contexts. |
Compared with MPQ2451GT-5-P, the AEC1 variant adds formal automotive qualification without changing electrical behavior, while the TPS54202DRCT trades AEC-Q100 compliance for higher output current and synchronous rectification - making it viable only outside automotive safety-critical domains.
Availability
MPQ2451GT-5-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control units requiring stable component supply with consistent parametric performance across production lots.
Supply support for MPQ2451GT-5-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 mixed-signal ICs for power management, motion control, and automotive applications.
The MPQ2451 product line delivers compact, AEC-Q100-qualified DC/DC converters optimized for automotive subsystems requiring wide-input-voltage operation, low quiescent current, and high reliability in harsh environments.
FAQ
What is the maximum allowable input voltage for MPQ2451GT-5-P?
The absolute maximum input voltage is +40V, but recommended operating range is 3.3V to 36V. Exceeding 36V may trigger internal UVLO or cause overstress during transients like ISO 7637-2 Pulse 5a. The device survives short-duration 40V spikes per datasheet ABSOLUTE MAXIMUM RATINGS, but sustained operation above 36V voids AEC-Q100 compliance and risks premature failure.
Does MPQ2451GT-5-P require an external bootstrap diode?
No external bootstrap diode is required for standard operation. The internal bootstrap regulator charges the BST capacitor from VIN through a PMOS pass transistor. An external diode (e.g., BAT54) is optional only for VIN ≤ 6V, high-duty-cycle applications (>65%), or when a clean 5V rail is available - it improves gate drive robustness but adds cost and board area.
Can MPQ2451GT-5-P operate with ceramic output capacitors only?
Yes - the device is internally compensated and explicitly specified to be stable with ceramic output capacitors (no minimum ESR requirement). Typical designs use 22µF X7R MLCCs. This eliminates tantalum or electrolytic capacitors, improving reliability and reducing height in ultra-thin automotive modules.
How does the current limit function without a sense resistor?
The MPQ2451GT-5-P uses a precision current-sense MOSFET integrated into the high-side switch die. It mirrors the main power FET's current with matched geometry and temperature tracking, feeding a high-speed comparator that triggers cycle-by-cycle shutdown at 0.75A typical. No external components are needed, preserving accuracy across temperature and process variation.
Is MPQ2451GT-5-P pin-compatible with MPQ2451GT-5-AEC1?
Yes - both share identical SOT23-6L pinout, electrical specifications, and thermal characteristics. The AEC1 suffix denotes full AEC-Q100 Grade 1 qualification including extended temperature validation, HTOL, and ESD testing. Functionally interchangeable in schematic and layout, but AEC1 is mandatory for automotive production releases requiring PPAP documentation.
What is the purpose of the OUT pin, and how should it be connected?
OUT is the internal feedback node tied to the top of an internal resistor divider set for 5V output. It must be connected directly to the positive terminal of the output capacitor - no external resistors or filtering. This connection establishes the regulation reference point and ensures accurate output voltage sensing without trace impedance errors.
Does MPQ2451GT-5-P support adjustable output voltage?
No - MPQ2451GT-5-P has a factory-trimmed fixed 5V output. The "-5" suffix denotes fixed 5V; adjustable versions (e.g., MPQ2451GG-00) exist but require external FB resistors and are not AEC-Q100 qualified. For 3.3V output, use MPQ2451GT-33 or MPQ2451GT-33-AEC1.
MPQ2451GT-5-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):
- 5V
- 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-5-P FAQ
1.How can I place an order for MPQ2451GT-5-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2451GT-5-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-5-P reliable?
The price and inventory of MPQ2451GT-5-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-5-P is usually 5 days.
3.What payment methods are accepted for MPQ2451GT-5-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2451GT-5-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2451GT-5-P?
MPQ2451GT-5-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2451GT-5-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-5-P?
For technical support, including MPQ2451GT-5-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2451GT-5-P requirements.
6.How does Aetrix verify that MPQ2451GT-5-P is sourced from the original manufacturer or authorized distributors?
All MPQ2451GT-5-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-5-P meets industry standards.
7.What is the process for return or replacement of MPQ2451GT-5-P?
All MPQ2451GT-5-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2451GT-5-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-5-P part is unused and in its original packaging.
Return procedure for MPQ2451GT-5-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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