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Monolithic Power Systems Inc. MPQ4345GLE-33-AEC1-P
- Part No.:
- MPQ4345GLE-33-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 17-PowerVFQFN
- Datasheet:
-
MPQ4345GLE-33-AEC1-P.pdf
- Description:
- IC REG BUCK 3.3V 2A 17QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,517
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Product details
Overview
MPQ4345GLE-33-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down converter delivering up to 2A output current at fixed 3.3V, with 3.3V–36V input range, 1μA shutdown quiescent current, and 42V load dump tolerance-designed for automotive power rails in ADAS camera modules.
For engineers reviewing the MPQ4345GLE-33-AEC1-P datasheet, MPQ4345GLE-33-AEC1-P pinout, MPQ4345GLE-33-AEC1-P application, or MPQ4345GLE-33-AEC1-P equivalent, key selection criteria include cold-crank support (3.1V min VIN), integrated 60mΩ/35mΩ MOSFETs, QFN-17 wettable flank package, and AAM/FCCM mode flexibility for light-load efficiency vs. transient response trade-offs.
Technical Context
This buck regulator employs zero-delay PWM control with configurable 350kHz–2.5MHz switching frequency and advanced asynchronous modulation (AAM) to reduce gate-driving losses under light loads. Its internal high-side and low-side MOSFETs enable compact layout while supporting forced continuous conduction mode (FCCM) via SYNCIN/MODE pin.
The device integrates thermal shutdown, over-current protection in hiccup mode, and a dedicated LDO mode for automotive cold-crank operation. The open-drain PG signal monitors VOUT within ±6% of nominal, and the BST capacitor enables bootstrap gate drive for the HS-FET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including cold crank (3.1V) and 42V load dump survival |
| Output Voltage | Fixed 3.3V ±1.0% - factory-trimmed accuracy ensures stable MCU/Sensor rail without external feedback resistors |
| Max Output Current | 2A continuous - sufficient for multi-rail domain supplies in infotainment SoCs or radar transceivers |
| Quiescent Current | 1μA in shutdown - enables always-on subsystems with minimal battery drain during vehicle sleep mode |
| Switching Frequency | Configurable 350kHz–2.5MHz - allows EMI optimization and inductor size reduction across diverse board layouts |
| Thermal Protection | Junction shutdown at 150°C - ensures fault-tolerant operation in sealed automotive enclosures |
| Package | QFN-17 (3mm×4mm) with wettable flanks - supports automated optical inspection (AOI) and reliable solder joint formation |
Pinout & Package
MPQ4345GLE-33-AEC1-P uses a thermally enhanced QFN-17 (3mm×4mm) package with wettable flanks for automotive-grade reflow reliability and AOI compatibility.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SS | Soft-start timing node - 10µA current source sets ramp time via external capacitor; prevents inrush into downstream capacitance |
| 2 | FREQ | Frequency configuration - resistor-to-ground selects switching frequency (e.g., 86.6kΩ = 410kHz) |
| 3 | SYNCIN/MODE | External sync input or FCCM/AAM mode select - pull high for FCCM, low for AAM, or drive with clock for synchronization |
| 4,11 | VIN | Main input supply - powers control circuitry and switches; requires local ceramic decoupling near pin |
| 5,10 | PGND | Power ground return - separate from AGND to minimize noise coupling into feedback path |
| 6 | BST | Bootstrap supply for HS-FET gate - requires ceramic capacitor between BST and SW to sustain high-side drive |
| 7,8 | SW | Switch node - connects internal HS/LS FETs; drives external inductor and carries high di/dt current |
| 9 | EN | Enable control - active-high logic; threshold 1V rising ensures robust start-up under noisy battery conditions |
| 12 | SYNCO | Synchronized clock output - phase-aligned with internal oscillator or external sync input; usable for multi-regulator timing coordination |
| 13 | PG | Power-good open-drain flag - asserts high when VOUT is within 94–106% of 3.3V; requires external pull-up |
| 14 | DNU | Do-not-use terminal - must be connected directly to VCC per datasheet to prevent undefined behavior |
| 15 | VCC | Bias supply for internal circuitry - regulated 5V output; requires dedicated 1µF ceramic capacitor to ground |
| 16 | AGND | Analog ground reference - isolated return for feedback and control circuits to maintain regulation accuracy |
| 17 | VOUT | Regulated output node - direct connection point for output capacitor and load; senses actual VOUT for feedback |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +150°C junction operation - meets automotive reliability and lifetime requirements |
| Integrated 60mΩ HS-FET / 35mΩ LS-FET | Eliminates external power devices and reduces BOM count while maintaining >90% efficiency at 1A load |
| Low-dropout (LDO) mode | Enables regulation down to VIN = 3.1V - sustains 3.3V output during engine cranking without dropout |
| Frequency spread spectrum (FSS) | Reduces peak EMI emissions by spreading switching energy across narrow band - simplifies EMC compliance |
| MeshConnect™ flip-chip packaging | Improves thermal resistance (θJC = 5.2°C/W) and power handling - lowers die temperature rise under 2A load |
Applications
| Automotive Camera Module Power | ADAS Domain Controller Core Rail |
|---|---|
Use Scenario: Powers image sensor, ISP, and interface circuitry in rear-view or surround-view cameras exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying digital core and I/O domains with tight voltage accuracy and fast load transient response. Use Value: 1μA shutdown IQ extends battery life during vehicle off-state; 42V load dump tolerance prevents field failures during alternator transients. | Use Scenario: Delivers stable 3.3V to microcontroller, CAN transceiver, and safety monitor ICs in centralized ADAS ECUs. IC Role / Device Role / Timing Role: High-reliability power stage enabling functional safety (ASIL-B capable) with thermal shutdown and hiccup-mode OCP. Use Value: Wettable flank QFN-17 ensures solder joint integrity in vibration-prone chassis mounting; AAM mode cuts no-load power by 60% vs. FCCM. |
| Automotive Infotainment Display Backlight | Industrial Telematics Gateway |
Use Scenario: Supplies 3.3V logic rail for display controller, touch processor, and audio codec in head-unit systems. IC Role / Device Role / Timing Role: Fixed-output buck converter with PG monitoring to coordinate system power sequencing and fault reporting. Use Value: Configurable fSW allows EMI tuning to avoid interference with AM/FM radio bands; SYNCIN enables multi-rail synchronization. | Use Scenario: Provides primary 3.3V supply for LTE/C-V2X modems, GNSS receivers, and secure boot processors in fleet management units. IC Role / Device Role / Timing Role: Automotive-qualified DC/DC with extended temperature range and robust input protection for harsh under-hood environments. Use Value: 3.3V output accuracy (±1%) ensures reliable DDR memory interface timing; 2.5MHz max fSW supports ultra-small inductors for space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4345JGLE-33-AEC1-P | QFN-19 package with additional NC and SYNCIN pins; identical electrical specs and AEC-Q100 Grade 1 rating | Supports more complex sync configurations and offers marginally better thermal performance (θJA = 43.6°C/W vs. 44.7°C/W) | Select when requiring external clock synchronization or enhanced thermal headroom in high-power-density layouts |
| TPS62933RTER | 3.3V fixed-output buck with 17V max VIN, 1.5A rating, and 2.5μA IQ in LP mode - lacks 42V load dump tolerance and AEC-Q100 qualification | Targeted at industrial or consumer portable systems, not automotive front-end power | Only consider for non-automotive applications where input voltage stays below 17V and AEC-Q100 is not required |
Compared with MPQ4345JGLE-33-AEC1-P, the MPQ4345GLE-33-AEC1-P saves PCB area and cost with QFN-17 while maintaining identical regulation performance; versus TPS62933RTER, it delivers automotive-grade ruggedness and higher current capability but requires stricter layout attention for EMI control.
Availability
MPQ4345GLE-33-AEC1-P is available at Aetrix Electronics and suitable for automotive clusters, ADAS camera modules, and infotainment head-units requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for MPQ4345GLE-33-AEC1-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 power management ICs for automotive, industrial, and computing markets.
The MPQ4345 product line targets automotive power conversion with AEC-Q100 qualification, integrated MOSFETs, and features like cold-crank support and load dump tolerance - designed specifically for demanding 12V/24V vehicle electrical systems.
FAQ
What is the minimum input voltage supported during cold-crank conditions?
The MPQ4345GLE-33-AEC1-P operates down to 3.1V input voltage, enabling uninterrupted 3.3V output during automotive engine cranking events. This is achieved via dedicated low-dropout (LDO) mode that maintains regulation even when VIN drops below VOUT, verified across -40°C to +150°C junction temperature.
How does the Advanced Asynchronous Modulation (AAM) mode improve efficiency?
AAM mode reduces switching frequency under light loads to minimize gate-driving and switching losses, achieving <3μA quiescent current. Unlike burst mode, AAM maintains fixed-frequency PWM control with zero-delay response, preserving transient performance while extending battery life in always-on automotive subsystems.
Is an external feedback resistor network required for the 3.3V output version?
No - MPQ4345GLE-33-AEC1-P has factory-trimmed internal feedback for fixed 3.3V output. No external resistors are needed, reducing BOM count and layout complexity. The VOUT pin connects directly to the output capacitor and load, with accuracy maintained at ±1.0% over temperature and line.
What is the purpose of the DNU pin, and how must it be connected?
The DNU (Do Not Use) pin must be connected directly to the VCC pin as specified in the datasheet. Leaving it floating or connecting it elsewhere may cause undefined behavior or failure to regulate. This connection ensures proper internal biasing and avoids latch-up risks in the control circuitry.
Can the MPQ4345GLE-33-AEC1-P synchronize to an external clock?
Yes - the SYNCIN/MODE pin accepts an external clock signal (90–115% of free-running frequency) to synchronize switching. When driven externally, the device locks its internal oscillator to the applied clock, and the SYNCO pin outputs a phase-aligned copy for coordinating multiple regulators in noise-sensitive systems.
What thermal metrics confirm suitability for sealed automotive enclosures?
The MPQ4345GLE-33-AEC1-P has θJA = 44.7°C/W on a 4-layer JEDEC board and θJC = 5.2°C/W on MPS's EVB. With 2A load and 150°C max junction temperature, it sustains operation at up to +85°C ambient in typical layouts - validated by thermal imaging in automotive-grade evaluation boards.
Does the device support power sequencing with other rails?
Yes - the open-drain PG pin provides a precise power-good signal (94–106% window) that can be used to enable downstream regulators or assert reset signals. Combined with programmable soft-start via the SS pin, it enables controlled, glitch-free power-up sequences across multi-rail automotive systems.
MPQ4345GLE-33-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 17-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 2A
- Frequency - Switching:
- 350kHz ~ 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 17-QFN (3x4)
MPQ4345GLE-33-AEC1-P FAQ
1.How can I place an order for MPQ4345GLE-33-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4345GLE-33-AEC1-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 MPQ4345GLE-33-AEC1-P reliable?
The price and inventory of MPQ4345GLE-33-AEC1-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4345GLE-33-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4345GLE-33-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4345GLE-33-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4345GLE-33-AEC1-P?
MPQ4345GLE-33-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4345GLE-33-AEC1-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 MPQ4345GLE-33-AEC1-P?
For technical support, including MPQ4345GLE-33-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4345GLE-33-AEC1-P requirements.
6.How does Aetrix verify that MPQ4345GLE-33-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4345GLE-33-AEC1-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 MPQ4345GLE-33-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4345GLE-33-AEC1-P?
All MPQ4345GLE-33-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4345GLE-33-AEC1-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 MPQ4345GLE-33-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4345GLE-33-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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