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Monolithic Power Systems Inc. MPQ4345GLE-5-AEC1-P
- Part No.:
- MPQ4345GLE-5-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 17-PowerVFQFN
- Datasheet:
-
MPQ4345GLE-5-AEC1-P.pdf
- Description:
- IC REG BUCK 5V 2A 17QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,160
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Product details
Overview
MPQ4345GLE-5-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down converter delivering 2A continuous output at fixed 5V with 3.3V–36V input range, 1μA shutdown current, 350kHz–2.5MHz configurable switching frequency, and integrated 60mΩ HS-FET / 35mΩ LS-FET - designed for automotive infotainment power rails.
For engineers reviewing the MPQ4345GLE-5-AEC1-P datasheet, MPQ4345GLE-5-AEC1-P pinout, MPQ4345GLE-5-AEC1-P application, or MPQ4345GLE-5-AEC1-P equivalent, key selection criteria include cold-crank support (3.1V), 42V load-dump tolerance, PG output accuracy (±6%), wettable-flank QFN-17 package, and AAM/FCCM mode control via SYNCIN/MODE pin.
Technical Context
The MPQ4345GLE-5-AEC1-P implements zero-delay PWM control with programmable frequency and advanced asynchronous modulation (AAM) to maintain high efficiency across light-to-heavy loads. Its internal power stage integrates matched HS/LS MOSFETs with thermal shutdown, over-current hiccup protection, and low-dropout (LDO) mode for automotive cold-crank conditions.
It features a dedicated soft-start pin (10µA current source), external synchronization capability (SYNCIN/MODE and SYNCO), open-drain power-good output with ±6% window, and bootstrap gate drive with BST-SW refresh thresholds (2.5V–2.9V). The device operates from –40°C to +150°C junction temperature and supports spread-spectrum FSS for EMI reduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.000 V ±1.2% (4900–5100 mV over –40°C to +150°C) |
| Input Voltage Range | 3.3 V to 36 V - supports full automotive battery range including cold crank (3.1V) and 42V load dump survival |
| Continuous Output Current | 2 A - sustained delivery with internal 60 mΩ HS-FET and 35 mΩ LS-FET enabling <1.5W conduction loss at full load |
| Quiescent Current | 3 µA typical in sleep mode - enables >1-year battery standby in always-on automotive modules |
| Switching Frequency | Configurable 350 kHz to 2.5 MHz via resistor on FREQ pin - allows optimization of size (high-f) vs. efficiency (low-f) |
| Power Good Accuracy | ±6% window (94–106% of VOUT) with 50 µs delay - provides reliable system power sequencing feedback |
| Operating Junction Temp | –40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and head-unit applications |
Pinout & Package
MPQ4345GLE-5-AEC1-P is housed in a wettable-flank QFN-17 (3mm × 4mm) package with exposed thermal pad, optimized for automotive reflow inspection and thermal performance (θJA = 44.7°C/W on 4-layer JEDEC board).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SS | Soft-start timing node - 10µA current source charges external capacitor to control inrush current ramp rate |
| 2 | FREQ | Frequency setting - resistor-to-ground configures fSW from 350kHz to 2.5MHz; enables EMI tuning |
| 3 | SYNCIN/MODE | Mode selection and sync input - pull low for AAM (light-load efficiency), high for FCCM, or drive with external clock |
| 4, 11 | VIN | Main input supply - powers control circuitry and HS-FET gate driver; requires local ceramic decoupling |
| 5, 10 | PGND | Power ground return - separate from AGND to minimize noise coupling into feedback path |
| 6 | BST | Bootstrap supply - connects to SW via 0.1µF ceramic capacitor to enable HS-FET gate drive above VIN |
| 7, 8 | SW | Switch node - connects to external inductor; carries high di/dt; layout critical for EMI and efficiency |
| 9 | EN | Enable control - active-high logic (1V threshold); pulls down to 0.85V to enter 1µA shutdown state |
| 12 | SYNCO | Synchronization output - phase-aligned clock signal for multi-rail timing coordination |
| 13 | PG | Open-drain power-good - requires external pull-up; asserts high when VOUT is within ±6% of 5V |
| 14 | DNU | Do-not-use - must be connected directly to VCC per datasheet; floating causes undefined behavior |
| 15 | VCC | Bias supply - regulated 5V internal rail; requires 1µF ceramic capacitor to ground for stability |
| 16 | AGND | Analog ground - reference for feedback, SS, and PG circuits; star-connected to PGND at single point |
| 17 | VOUT | Regulated output sense - direct connection to output capacitor; used for feedback and PG monitoring |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +150°C operation with full automotive stress testing (HTOL, TC, UHAST) |
| 42V load-dump survival | Withstands ISO 7637-2 Pulse 5a without external TVS - reduces BOM count in front-end power stages |
| Low-dropout (LDO) mode | Maintains regulation down to VIN = 3.1V at full 2A - ensures camera or display operation during engine cranking |
| MeshConnect™ flip-chip packaging | Reduces parasitic inductance by >30% vs. wire-bond QFN - improves transient response and EMI signature |
| Frequency spread spectrum (FSS) | Modulates fSW by ±10% to lower peak EMI amplitude - simplifies compliance with CISPR 25 Class 5 |
| Wettable flanks | Enables automated optical inspection (AOI) of solder joints - critical for automotive process traceability |
Applications
| Automotive Infotainment | ADAS Camera Modules |
|---|---|
|
Use Scenario: Powering SoC core voltage (5V I/O rail) and USB hub controllers in head units with wide battery input variation. IC Role / Device Role / Timing Role: Primary buck regulator providing stable 5V at up to 2A with fast load-step response (<10µs) and precise PG signaling. Use Value: Eliminates need for external LDO post-regulator due to ±1.2% VOUT accuracy and 3.1V cold-crank support. |
Use Scenario: Supplying image sensor interface and ISP power in rear-view or surround-view cameras mounted near bumpers. IC Role / Device Role / Timing Role: High-reliability 5V source operating continuously in harsh thermal environments (–40°C to +105°C ambient). Use Value: 150°C max junction rating and wettable-flank QFN ensure long-term solder joint integrity under thermal cycling. |
| Automotive Clusters | Industrial Vehicle Telematics |
|
Use Scenario: Generating 5V for TFT-LCD bias, microcontroller peripherals, and CAN transceiver logic in digital instrument clusters. IC Role / Device Role / Timing Role: Synchronous buck with PG output synchronized to MCU reset sequence for deterministic boot timing. Use Value: 50µs PG assertion delay enables clean power sequencing without external timers or supervisors. |
Use Scenario: Powering LTE/Wi-Fi modems and GPS receivers in fleet management gateways exposed to 24V truck/bus electrical systems. IC Role / Device Role / Timing Role: Input-tolerant DC-DC converter surviving 42V transients and operating down to 3.3V during alternator failure. Use Value: Integrated OVP (40V) and UVLO hysteresis (200mV) prevent brown-out resets during load dump events. |
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-5-AEC1-P | QFN-19 package with extra NC and SYNCIN/MODE pins; identical electrical specs and AEC-Q100 qualification | Supports more complex synchronization schemes requiring dedicated MODE control and additional routing flexibility | Select when board layout requires isolation between SYNCIN and MODE functions or when using MPS evaluation boards with QFN-19 footprints |
| TPS62933RQYR | 3.3V–36V, 3A, 1.5µA IQ, but only AEC-Q100 Grade 2 (–40°C to +125°C); no wettable flanks or FSS | Limited to cabin-zone applications without under-hood thermal stress or strict AOI requirements | Choose only if higher current (3A) is required and Grade 1 qualification is not mandated by OEM specification |
Compared with MPQ4345JGLE-5-AEC1-P, the MPQ4345GLE-5-AEC1-P offers identical performance in a smaller QFN-17 footprint ideal for space-constrained displays, while the TPS62933RQYR trades Grade 1 reliability and EMI features for higher current - making it unsuitable for safety-critical ADAS or cluster use.
Availability
MPQ4345GLE-5-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, digital instrument clusters, and industrial telematics requiring stable component supply with full AEC-Q100 traceability and PPAP support.
Supply support for MPQ4345GLE-5-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, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ4345 series belongs to MPS's automotive-grade DC-DC converter product line, engineered specifically for demanding vehicle subsystems where reliability, thermal robustness, and EMI compliance are non-negotiable.
FAQ
What is the minimum input voltage supported during cold-crank conditions?
The MPQ4345GLE-5-AEC1-P supports operation down to 3.1V input while maintaining regulated 5V output at full 2A load, enabled by its low-dropout (LDO) mode - verified per AEC-Q100 cold-crank test profiles.
Does this part require an external bootstrap capacitor?
Yes - a 0.1µF X7R ceramic capacitor must be placed between BST and SW pins. This capacitor supplies gate drive energy for the internal high-side MOSFET and is critical for proper startup and regulation.
How is power-good (PG) accuracy defined, and what is its trip window?
PG asserts high when VOUT is within 94% to 106% of nominal 5V (i.e., 4.7V–5.3V), with 50µs delay on both rising and falling edges. The ±6% window is guaranteed over –40°C to +150°C junction temperature.
Can the switching frequency be synchronized to an external clock?
Yes - applying a clock signal to the SYNCIN/MODE pin synchronizes the internal oscillator. The device accepts external clocks from 90% to 115% of its free-running frequency, enabling multi-rail EMI alignment.
What is the thermal resistance (θJA) for the QFN-17 package?
θJA is 44.7°C/W measured per JESD51-7 on a 4-layer PCB. On MPS's standard EVB (2oz copper, 4-layer, 8.3cm × 8.3cm), θJA is 29.2°C/W - enabling 2A continuous operation with ≤20°C case rise at TA = 85°C.
Is the DNU pin optional or mandatory to connect?
The DNU pin is mandatory to connect directly to VCC. Leaving it floating violates the absolute maximum ratings and may cause erratic enable behavior or startup failure - per datasheet Section 5, Pin Functions.
What protection features are included beyond over-current?
In addition to hiccup-mode over-current protection, the device includes thermal shutdown (150°C trip, 20°C hysteresis), input over-voltage protection (40V), under-voltage lockout (3.0V rising), and zero-current detection for valley-switching control in AAM mode.
MPQ4345GLE-5-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):
- 5V
- 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-5-AEC1-P FAQ
1.How can I place an order for MPQ4345GLE-5-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4345GLE-5-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-5-AEC1-P reliable?
The price and inventory of MPQ4345GLE-5-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-5-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4345GLE-5-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4345GLE-5-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4345GLE-5-AEC1-P?
MPQ4345GLE-5-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4345GLE-5-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-5-AEC1-P?
For technical support, including MPQ4345GLE-5-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4345GLE-5-AEC1-P requirements.
6.How does Aetrix verify that MPQ4345GLE-5-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4345GLE-5-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-5-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4345GLE-5-AEC1-P?
All MPQ4345GLE-5-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4345GLE-5-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-5-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4345GLE-5-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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