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Monolithic Power Systems Inc. MPQ2451GT-5-AEC1-Z
- Part No.:
- MPQ2451GT-5-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-6
- Datasheet:
-
MPQ2451GT-5-AEC1-Z.pdf
- Description:
- IC REG BUCK 5V 600MA SOT23-6L
- Quantity:
- Payment:
- Shipping:
Inventory:2,955
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Product details
Overview
MPQ2451GT-5-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, 36V-input, 2.2MHz asynchronous step-down DC/DC converter with integrated 500mΩ high-side MOSFET, delivering up to 0.6A at fixed 5V output. It features current-mode control, internal soft-start, and 130µA quiescent current-designed for automotive infotainment power rails requiring stable 5V supply under wide input transients (3.3V–36V).
For engineers reviewing the MPQ2451GT-5-AEC1-Z datasheet, MPQ2451GT-5-AEC1-Z pinout, MPQ2451GT-5-AEC1-Z application, or MPQ2451GT-5-AEC1-Z equivalent, this device supports critical design checks including VIN UVLO threshold (2.9V), thermal shutdown (150°C), BST bootstrap operation, pulse-skipping efficiency optimization, and AEC-Q100-compliant reliability validation.
Technical Context
The MPQ2451GT-5-AEC1-Z implements peak-current-mode PWM control with a fixed 2.2MHz oscillator and internal compensation, eliminating external loop components. Its current-sense architecture enables cycle-by-cycle overcurrent protection without a sense resistor, with a precision ILIM of 0.75A (typ) and 0.65A (min) across −40°C to +125°C.
It integrates a 2.6V internal regulator powered directly from VIN, enabling full-range operation down to 3.3V input, and employs frequency fold-back during start-up to prevent inductor current runaway. Bootstrap charging relies on external BST–SW capacitor and internal PMOS pass transistor, with dedicated floating-driver UVLO (2.4V rising threshold).
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 handles load-dump transients up to 40V absolute max. |
| Output Voltage | Fixed 5V ±2% - internally trimmed; no external feedback resistors required for 5V rail generation. |
| Switching Frequency | 2.2MHz (±20%) - enables use of small 2.2–3.3µH inductors and ceramic capacitors, reducing solution footprint. |
| Max Output Current | 0.6A continuous - limited by internal MOSFET RDS(ON) (500mΩ) and thermal design (SOT23-6L θJA = 220°C/W). |
| Quiescent Current | 130µA - ensures <10µA system standby drain when EN is low, critical for always-on automotive modules. |
| Shutdown Current | 1µA - ultra-low leakage in disable state, preserving battery life in parked-vehicle scenarios. |
| Thermal Shutdown | 150°C - protects die during overload or poor PCB heatsinking; auto-recovery upon cooldown. |
Pinout & Package
MPQ2451GT-5-AEC1-Z is packaged in SOT23-6L (JEDEC MO-178AA), a thermally enhanced 6-pin surface-mount package with exposed pad for improved heat dissipation. Pin mapping is identical between SOT23-6L and QFN-6L variants per datasheet Rev 1.0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 1) | Bootstrap Supply | Provides gate drive voltage for high-side MOSFET; requires 100nF ceramic capacitor to SW to sustain >5V gate bias during high-duty cycles. |
| GND (Pin 2) | Power Ground | Primary return path for output capacitor and IC ground; must be connected close to output cap to minimize noise coupling into FB node. |
| OUT (Pin 3) | Feedback Sense | Connects to internal 5V divider tap; sets regulated output without external resistors-only used in fixed-output versions. |
| EN (Pin 4) | Enable Control | Active-high logic input (VIH = 1.35–1.8V); float-to-disable behavior simplifies power sequencing in automotive systems. |
| VIN (Pin 5) | Main Input Supply | Powers internal regulator and control circuitry; requires ≥10µF ceramic decoupling placed within 2mm of pin to suppress switching spikes. |
| SW (Pin 6) | Switch Node | Drain of integrated high-side MOSFET; connects to inductor and freewheeling diode; high dv/dt node requiring tight layout and guard ring. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C junction operation with HTOL, TC, ESD, and AC/DC stress testing-meets automotive electronics reliability requirements. |
| Internal soft-start (0.5–1ms) | Prevents output overshoot and inrush current during cold-start; ramp time is fixed and unadjustable, ensuring consistent startup behavior. |
| Precision current limit (0.75A typ) | Enables robust short-circuit protection without external sensing; eliminates need for shunt resistor and associated board space/power loss. |
| Stable with ceramic output capacitors | Eliminates ESR dependency for loop stability-supports low-profile, high-reliability 22µF X5R/X7R MLCCs instead of bulkier tantalum or electrolytic types. |
| Frequency fold-back at light load | Reduces switching losses below ~100mA load, improving efficiency to >85% at 1mA while maintaining regulation via pulse-skipping mode. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powering USB-C host controller and display interface ICs in head-unit systems subject to 12V battery fluctuations and cold-crank events. IC Role / Device Role / Timing Role: Primary 5V buck converter supplying core logic voltage; operates as standalone regulator with no external compensation. Use Value: 3.3V–36V input range accommodates ISO 7637-2 Pulse 4 (cold crank) down to 3.3V; AEC-Q100 qualification ensures functional safety compliance. |
Use Scenario: Generating clean 5V rail for CMOS image sensor and ISP in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Point-of-load regulator with fast transient response (<10µs recovery) enabled by current-mode control and 2.2MHz switching. Use Value: 130µA quiescent current minimizes parasitic drain during vehicle sleep mode; internal soft-start prevents sensor reset glitches at power-on. |
| Industrial Telematics Gateway | Electric Power Steering (EPS) Sensor Interface |
|
Use Scenario: Providing isolated 5V supply to LTE modem and CAN transceiver in fleet management telematics units mounted in engine bay. IC Role / Device Role / Timing Role: High-voltage input buck stage preceding LDOs; handles load dump (40V abs max) and reverse-battery protection via external diode. Use Value: Thermal shutdown (150°C) and wide temp range (−40°C to +125°C) ensure uninterrupted operation in under-hood environments. |
Use Scenario: Powering Hall-effect position sensors and signal-conditioning amplifiers in EPS motor control assemblies. IC Role / Device Role / Timing Role: Safety-critical auxiliary supply with fault tolerance; EN pin enables synchronized power-up with MCU reset sequence. Use Value: Precision current limit (0.75A) prevents latch-up during sensor short circuits; BST/SW layout guidance ensures reliable gate drive under vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130AQRGTRQ1 | 3.0V–17V input, 3MHz fixed frequency, 3A output, integrated synchronous rectifier; higher current but narrower VIN range. | Not suitable for direct 24V or load-dump tolerant designs; requires external compensation and lacks AEC-Q100 Grade 1 rating. | Select if >1A output and synchronous efficiency are required, and input stays within 17V max. |
| LM61480QRNXTQ1 | 3.0V–36V input, 2.1MHz, 8A output, spread-spectrum EMI reduction, adjustable output; larger QFN-16 package. | Over-specified for 0.6A use cases; adds complexity (external feedback, compensation) and cost where fixed 5V suffices. | Choose only when scaling to multi-amp loads or when EMI certification mandates spread-spectrum operation. |
Compared with TPS62130AQRGTRQ1 and LM61480QRNXTQ1, MPQ2451GT-5-AEC1-Z delivers optimal balance of AEC-Q100 compliance, minimal BOM count (no feedback resistors), ultra-low IQ, and compact SOT23-6L footprint-making it the most efficient fit for cost-sensitive, space-constrained 0.6A automotive 5V rails.
Availability
MPQ2451GT-5-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial telematics gateways requiring stable component supply with AEC-Q100 traceability and long-term production support.
Supply support for MPQ2451GT-5-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ2451 series belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for harsh-environment applications demanding AEC-Q100 qualification, wide input range, and minimal external components.
FAQ
What is the minimum input voltage required for MPQ2451GT-5-AEC1-Z to regulate 5V output?
The device regulates 5V output down to 3.3V input, verified across −40°C to +125°C junction temperature. Below 3.3V, UVLO disables operation; the rising threshold is 2.9V with 0.4V hysteresis. This ensures reliable startup during automotive cold-crank conditions where battery voltage dips to 3.3V.
Can MPQ2451GT-5-AEC1-Z operate without an external bootstrap capacitor?
No. The BST pin requires a 100nF ceramic capacitor connected between BST and SW to sustain gate drive for the internal high-side MOSFET. Omitting it causes immediate failure due to insufficient VGS; the datasheet specifies this as mandatory in all operating conditions, including pulse-skipping mode.
Is the 5V output adjustable using external resistors?
No. MPQ2451GT-5-AEC1-Z has a factory-trimmed internal feedback divider for fixed 5V output. The OUT pin connects directly to this internal node and is not intended for external resistor networks. For adjustable output, select MPQ2451GG-ADJ variants instead.
How does thermal performance differ between SOT23-6L and QFN-6L packages?
SOT23-6L has θJA = 220°C/W and max power dissipation of 0.57W at 25°C ambient; QFN-6L achieves θJA = 80°C/W and 1.56W due to its exposed thermal pad. For 0.6A at 12V input, SOT23-6L requires careful copper pour and thermal vias to avoid thermal shutdown above 60°C ambient.
Does MPQ2451GT-5-AEC1-Z support forced PWM mode to eliminate audible noise?
No. It operates exclusively in PWM mode at medium-to-heavy loads and automatically transitions to pulse-skipping mode at light loads. There is no pin or register to force continuous PWM; this trade-off prioritizes light-load efficiency over noise control.
What is the maximum duty cycle achievable with MPQ2451GT-5-AEC1-Z?
The theoretical maximum duty cycle is ~90%, limited by minimum off-time (~100ns) and 2.2MHz switching frequency. At VIN = 36V and VOUT = 5V, practical duty cycle is ~14%; at VIN = 7V, it reaches ~71%. Bootstrap charging must be verified above 65% duty cycle to maintain gate drive.
Is the enable pin (EN) compatible with open-drain microcontroller GPIOs?
Yes. With VIH = 1.35–1.8V and internal pull-down, EN accepts standard 3.3V or 5V open-drain outputs. A 10kΩ pull-up to 3.3V ensures reliable enable; floating EN defaults to disable, providing fail-safe behavior during MCU boot or reset.
MPQ2451GT-5-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):
- 5V
- 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-5-AEC1-Z FAQ
1.How can I place an order for MPQ2451GT-5-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2451GT-5-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-5-AEC1-Z reliable?
The price and inventory of MPQ2451GT-5-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-5-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ2451GT-5-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2451GT-5-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2451GT-5-AEC1-Z?
MPQ2451GT-5-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2451GT-5-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-5-AEC1-Z?
For technical support, including MPQ2451GT-5-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2451GT-5-AEC1-Z requirements.
6.How does Aetrix verify that MPQ2451GT-5-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2451GT-5-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-5-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ2451GT-5-AEC1-Z?
All MPQ2451GT-5-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2451GT-5-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-5-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ2451GT-5-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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