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Monolithic Power Systems Inc. MPQ2451GT-33-AEC1-Z
- Part No.:
- MPQ2451GT-33-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-6
- Datasheet:
-
MPQ2451GT-33-AEC1-Z.pdf
- Description:
- IC REG BUCK 3.3V 600MA SOT23-6L
- Quantity:
- Payment:
- Shipping:
Inventory:3,800
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Product details
Overview
MPQ2451GT-33-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, 36V-input, 3.3V-output synchronous step-down DC/DC converter with integrated 500mΩ high-side MOSFET, delivering up to 0.6A output current at 2.2MHz fixed switching frequency. It features 130µA quiescent current, internal soft-start, and operates across −40°C to +125°C junction temperature for automotive power rail generation.
For engineers reviewing the MPQ2451GT-33-AEC1-Z datasheet, MPQ2451GT-33-AEC1-Z pinout, MPQ2451GT-33-AEC1-Z application, or MPQ2451GT-33-AEC1-Z equivalent, key selection criteria include its 3.3V fixed output, 3.3V–36V input range, AEC-Q100 qualification, SOT23-6L package, and pulse-skipping light-load efficiency mode.
Technical Context
The MPQ2451GT-33-AEC1-Z implements current-mode control with internal compensation and a 2.2MHz oscillator, enabling compact filter design using small inductors (e.g., 3.3µH) and ceramic capacitors. Its bootstrap gate driver supports high-side MOSFET operation with external BST capacitor coupling between BST and SW pins.
It integrates under-voltage lockout (UVLO rising threshold 2.9V), thermal shutdown (150°C), and precision cycle-by-cycle current limiting without external sense resistors. Pulse-skipping mode activates when COMP voltage falls below sleep threshold, reducing quiescent current to 1µA in shutdown and 130µA in active no-load operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3.6% (3.168V–3.432V) over full input and temperature range |
| Input Voltage Range | 3.3V to 36V - supports direct battery connection in 12V/24V automotive systems |
| Max Output Current | 0.6A continuous - limited by internal 500mΩ MOSFET RDS(ON) and thermal design |
| Switching Frequency | 2.2MHz ±18% - enables use of sub-4µH inductors and reduces EMI fundamental frequency |
| Quiescent Current | 130µA typical at no load - sustains low-power wake-up circuits in always-on automotive modules |
| Shutdown Current | 1µA maximum - preserves battery life during vehicle sleep mode |
| Operating Temp | −40°C to +125°C junction - meets AEC-Q100 Grade 1 requirements for engine bay and ADAS applications |
Pinout & Package
MPQ2451GT-33-AEC1-Z is packaged in SOT23-6L - a thermally enhanced, lead-free, RoHS-compliant surface-mount package with exposed pad (GND-connected) for improved heat dissipation in space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 1) | Bootstrap supply | Provides floating gate drive voltage for high-side MOSFET; requires 100nF ceramic capacitor to SW |
| GND (Pin 2) | Power ground | Primary return path for output current and IC bias; connects to exposed pad for thermal conduction |
| OUT (Pin 3) | Feedback node | Internally connected to 3.3V divider tap; sets regulated output without external resistors |
| EN (Pin 4) | Enable control | Logic-high (>1.35V) enables regulation; floating or <0.3V disables with 1µA shutdown current |
| VIN (Pin 5) | Main input supply | Accepts 3.3V–36V; powers internal regulator and gate driver; requires local 10µF decoupling |
| SW (Pin 6) | Switch node | Drives external freewheeling diode or synchronous rectifier; high dv/dt node requiring tight layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from −40°C to +125°C ambient with full reliability testing |
| Internal 500mΩ high-side MOSFET | Eliminates external switch and associated gate drive complexity; reduces BOM count and footprint |
| Precision current limit (0.75A typ) | Enables robust short-circuit protection without sensing resistor - improves accuracy and thermal margin |
| Stable with ceramic output capacitors | Supports low-ESR, high-frequency ceramics (e.g., 22µF X5R) - simplifies filtering and lowers cost |
| Frequency fold-back at startup | Prevents inductor current runaway during VIN ramp-up by temporarily lowering fSW |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powering USB-C PD interface and display logic in head-unit systems with wide battery input variation (9V–16V). IC Role / Device Role / Timing Role: Primary 3.3V rail generator with fast transient response to handle burst-mode data transmission loads. Use Value: 130µA quiescent current extends battery runtime during ignition-off states; AEC-Q100 ensures reliability over 15-year vehicle lifecycle. |
Use Scenario: Supplying image sensor and ISP in rear-view or surround-view cameras mounted in exterior housings. IC Role / Device Role / Timing Role: Compact, thermally robust 3.3V source operating directly from 12V battery with cold-crank tolerance down to 3.3V. Use Value: 2.2MHz switching allows ultra-small 2.2µH inductor; SOT23-6L fits tight camera PCB real estate while meeting IP67 thermal constraints. |
| Body Control Module (BCM) | Automotive Telematics Unit |
|
Use Scenario: Generating 3.3V for CAN transceivers, LIN controllers, and microcontroller I/O rails in door modules and seat controllers. IC Role / Device Role / Timing Role: Always-on auxiliary regulator supporting wake-on-LIN/CAN functionality with ultra-low shutdown current. Use Value: 1µA shutdown current prevents parasitic drain; internal soft-start avoids inrush-induced bus droop during module power-up. |
Use Scenario: Powering LTE modem, GNSS receiver, and secure element in embedded telematics control units (TCUs). IC Role / Device Role / Timing Role: High-efficiency intermediate regulator converting 12V battery to clean 3.3V for RF-sensitive analog and digital subsystems. Use Value: >90% peak efficiency and pulse-skipping mode minimize self-heating near RF antennas; low EMI due to fixed 2.2MHz frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3.3V automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 3.0V–17V input, 3A output, 2.25MHz, non-AEC-Q100, QFN-16 | Lacks automotive qualification; higher current but wider package footprint | Select only for non-automotive industrial designs needing >0.6A or lower input voltage |
| LMQ66430QRNXTQ1 | 3.0V–36V input, 3A output, 2.1MHz, AEC-Q100 Grade 1, QFN-16 | Higher current, larger package, higher BOM cost; includes integrated boot diode | Choose when system requires >0.6A or simplified layout without external bootstrap diode |
Compared with TPS62130ARGTR and LMQ66430QRNXTQ1, MPQ2451GT-33-AEC1-Z delivers optimal balance of AEC-Q100 compliance, SOT23-6L compactness, and 0.6A capability for cost-sensitive, space-constrained automotive modules where 3.3V rail stability and low quiescent current are critical.
Availability
MPQ2451GT-33-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control modules requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for MPQ2451GT-33-AEC1-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 MPQ2451 series belongs to MPS's automotive-grade power management portfolio, designed specifically for reliable, compact, and efficient voltage regulation in harsh-temperature automotive environments including engine control, safety, and connectivity systems.
FAQ
What is the minimum input voltage required for MPQ2451GT-33-AEC1-Z to regulate 3.3V output?
The device regulates 3.3V output down to 3.3V input, enabled by its internal bootstrap architecture and low dropout behavior during high-duty-cycle operation. Below 3.3V, UVLO (2.9V rising threshold) disables regulation to protect internal circuitry. This makes it suitable for cold-crank scenarios where battery voltage dips to ~3.3V in 12V systems.
Does MPQ2451GT-33-AEC1-Z require an external bootstrap diode?
No external bootstrap diode is required for standard operation. The IC includes an internal bootstrap regulator that charges the BST capacitor from VIN during SW low-time. An external diode (e.g., BAT54) is optional only for VIN ≤ 6V or duty cycles >65%, where additional BST voltage headroom improves gate drive margin and efficiency.
How does the MPQ2451GT-33-AEC1-Z achieve >90% efficiency?
Efficiency exceeds 90% at mid-to-heavy loads due to low 500mΩ RDS(ON), optimized gate drive, and fixed 2.2MHz switching that minimizes conduction losses. Under light load, pulse-skipping mode reduces switching and gate-driving losses, maintaining high efficiency across 10µA–600mA output range.
Can MPQ2451GT-33-AEC1-Z be used with ceramic output capacitors only?
Yes - the IC is internally compensated and stable with ceramic output capacitors as low as 10µF. Its control loop is designed for low-ESR ceramics, eliminating need for tantalum or electrolytic bulk capacitance and reducing board area and cost in automotive applications.
What thermal considerations apply to the SOT23-6L package in automotive environments?
The SOT23-6L has θJA = 220°C/W on standard 2-layer PCB. For continuous 0.6A operation at +85°C ambient, thermal vias under the exposed GND pad and copper pour are essential. Derating to 0.4A is recommended above +105°C ambient to maintain <125°C junction temperature per AEC-Q100 limits.
Is there a functional difference between MPQ2451GT-33-AEC1-Z and MPQ2451GT-33-AEC1?
No functional difference - the "-Z" suffix denotes tape-and-reel packaging (3,000 units/reel) per MPS ordering convention. Electrical, thermal, and qualification specifications are identical; only packaging format differs for automated assembly compatibility.
MPQ2451GT-33-AEC1-Z 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6L
MPQ2451GT-33-AEC1-Z FAQ
1.How can I place an order for MPQ2451GT-33-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2451GT-33-AEC1-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 MPQ2451GT-33-AEC1-Z reliable?
The price and inventory of MPQ2451GT-33-AEC1-Z 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-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ2451GT-33-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2451GT-33-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2451GT-33-AEC1-Z?
MPQ2451GT-33-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2451GT-33-AEC1-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 MPQ2451GT-33-AEC1-Z?
For technical support, including MPQ2451GT-33-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2451GT-33-AEC1-Z requirements.
6.How does Aetrix verify that MPQ2451GT-33-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2451GT-33-AEC1-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 MPQ2451GT-33-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ2451GT-33-AEC1-Z?
All MPQ2451GT-33-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2451GT-33-AEC1-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 MPQ2451GT-33-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ2451GT-33-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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