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Monolithic Power Systems Inc. MPQ3425DL-AEC1-LF-Z
- Part No.:
- MPQ3425DL-AEC1-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
MPQ3425DL-AEC1-LF-Z.pdf
- Description:
- IC REG BOOST ADJ 3A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,850
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Product details
Overview
MPQ3425DL-AEC1-LF-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, current-mode boost converter IC with integrated 3.5A/90mΩ MOSFET, 3.1V–22V BIAS input range, programmable 300kHz–1MHz switching frequency, and 55V maximum output voltage. It delivers fast transient response in automotive pre-boost and microphone bias applications requiring high reliability under temperature extremes.
For engineers reviewing the MPQ3425DL-AEC1-LF-Z datasheet, MPQ3425DL-AEC1-LF-Z pinout, MPQ3425DL-AEC1-LF-Z application, or MPQ3425DL-AEC1-LF-Z equivalent, key selection criteria include its AEC-Q100 qualification, programmable UVLO hysteresis, soft-start capacitor control, thermal shutdown at 160°C, and QFN-14 (3mm×4mm) package with exposed PGND pad for thermal management.
Technical Context
The MPQ3425 employs constant-frequency peak-current-mode control with a transconductance error amplifier (160μA/V gain), internal 1.225V reference, and configurable compensation via COMP pin. Its architecture supports stable operation with ceramic output capacitors and enables precise loop tuning using external R/C networks.
Switching frequency is set linearly by FSET pin current (regulated to 0.5V), enabling accurate selection from 300kHz to 1MHz. The device integrates EN-controlled micropower shutdown (<1μA), programmable soft-start (5μA charge current), and robust protection including UVLO with hysteresis, cycle-by-cycle current limiting, and thermal shutdown at 160°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | Up to 55V - supports high-voltage bias rails for automotive sensors and RF tuners. |
| Input BIAS Voltage | 3.1V to 22V - powers internal LDO independently of VIN, enabling flexible supply sequencing. |
| Switching Frequency | 300kHz to 1MHz - selectable via FSET resistor; higher frequencies reduce filter size and EMI, lower frequencies improve efficiency at light loads. |
| Internal MOSFET | 3.5A/90mΩ - eliminates external switch, reduces board area, and ensures consistent thermal performance in compact layouts. |
| Feedback Reference | 1.225V ±25mV - tight tolerance enables accurate output regulation across -40°C to +125°C junction temperature range. |
| Soft-Start Control | 5μA constant-current source on SS pin - allows precise ramp time control via external capacitor; prevents inrush current during startup. |
| Thermal Shutdown | 160°C - protects die under overload or poor PCB thermal design; auto-recovery after cooldown. |
Pinout & Package
MPQ3425DL-AEC1-LF-Z uses a thermally enhanced QFN-14 (3mm × 4mm) package with exposed power ground pad on underside. The exposed pad must be soldered to PCB copper for optimal thermal resistance (θJC = 12°C/W) and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 COMP | Compensation node | Connects external RC network to set loop stability poles/zeros; directly interfaces with transconductance error amplifier output. |
| 2 EN | Enable control input | Pull high (>1.5V) to enable; pull low (<0.5V) to disable; also programs UVLO threshold and hysteresis via external divider. |
| 3 BIAS | LDO supply input | Provides regulated internal supply; must be bypassed locally with ≥1μF ceramic capacitor to ensure gate driver stability. |
| 4,5,6 SW | Power switch drain terminals | Three paralleled pins reduce conduction loss and thermal stress; connect directly to inductor and rectifier diode anode. |
| 7 VDD | LDO output | Supplies gate driver; requires local 10nF bypass capacitor to maintain low-impedance path during switching transitions. |
| 8,9,10,EP | Power ground (PGND) | Low-inductance return path for high-current switching loop; exposed pad must be connected to solid GND plane for thermal and EMI performance. |
| 11 AGND | Analog ground reference | Separate ground for feedback and error amplifier; tie to PGND only at single point near exposed pad to avoid noise coupling. |
| 12 SS | Soft-start timing | 5μA current source charges external capacitor; controls VCOMP ramp rate and startup frequency foldback (¼ fSW → full fSW). |
| 13 FB | Feedback input | Senses output via resistor divider; 1.225V reference enables precise output setting with minimal load regulation error. |
| 14 FSET | Frequency programming | Current-sink pin regulated to 0.5V; sets fSW linearly (e.g., 84.5kΩ → 550kHz); enables EMI optimization without changing layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures from −40°C to +125°C, supporting engine bay and ADAS subsystem deployment. |
| Programmable UVLO with hysteresis | EN pin accepts external resistor divider; 4μA hysteresis current enables precise turn-on/off thresholds and prevents oscillation near trip points. |
| Micropower shutdown mode | <1μA quiescent current when EN = 0V - critical for always-on automotive modules needing ultra-low standby power. |
| Configurable soft-start timing | SS pin supports user-defined ramp duration (e.g., 100nF → ~50ms); eliminates output overshoot and input capacitor stress during cold start. |
| Thermal shutdown with auto-recovery | OTP triggers at 160°C junction temperature; device resumes operation after die cools below hysteresis threshold (~145°C). |
Applications
| Automotive Camera Power Supply | RF Tuner Bias Generator |
|---|---|
|
Use Scenario: Powers image sensor and ISP in rear-view or surround-view cameras requiring stable 12V–15V from 5V or 8V vehicle bus. IC Role / Device Role / Timing Role: Primary boost regulator delivering up to 1.5A with <±1% line/load regulation and <20mV ripple at 400kHz. Use Value: AEC-Q100 qualification ensures reliability over 15-year vehicle life; programmable fSW avoids AM band interference. |
Use Scenario: Generates 24V–48V bias for automotive radio front-end LNAs and mixer stages in digital broadcast receivers. IC Role / Device Role / Timing Role: High-voltage boost stage with 55V capability and low-noise operation enabled by ceramic-capacitor compatibility. Use Value: 90mΩ MOSFET minimizes conduction loss at 300mA loads; soft-start prevents tuner lock-up during ignition cycles. |
| Pre-Boost for DC-DC Cascades | Microphone Bias for In-Cabin Audio |
|
Use Scenario: Elevates 3.3V/5V rail to 12V before feeding downstream buck converters in infotainment head units. IC Role / Device Role / Timing Role: Input-stage voltage translator enabling efficient multi-rail power architecture with shared thermal budget. Use Value: Wide 3.1V–22V BIAS range allows independent supply from battery or auxiliary rail; QFN-14 footprint saves space vs discrete solutions. |
Use Scenario: Supplies 5V–12V bias to MEMS microphones in driver monitoring and voice assistant systems. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current boost source with <1μA shutdown current for always-listening operation. Use Value: Micropower shutdown extends battery runtime in telematics modules; 1.225V FB reference ensures stable bias under vibration-induced load transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5122MH/NOPB | Higher 65V rating, external MOSFET required, no integrated soft-start capacitor control. | Used in industrial 48V systems where higher voltage margin and discrete FET selection are prioritized over space-constrained automotive layouts. | Select when >55V output or discrete FET thermal isolation is needed; requires additional gate driver and compensation design effort. |
| TPS61088RHLR | Lower 28V max output, non-AEC-Q100, fixed 500kHz fSW, no programmable UVLO hysteresis. | Suitable for consumer-grade portable electronics but lacks automotive qualification and flexible protection configuration. | Choose only for cost-sensitive non-automotive designs where AEC-Q100, 55V capability, and programmable features are not required. |
Compared with LM5122MH/NOPB and TPS61088RHLR, MPQ3425DL-AEC1-LF-Z uniquely combines AEC-Q100 Grade 1 compliance, 55V output, integrated 3.5A MOSFET, and fully programmable UVLO/soft-start/fSW in a 3mm×4mm QFN-making it the only drop-in solution for space-constrained, high-reliability automotive boost applications.
Availability
MPQ3425DL-AEC1-LF-Z is available at Aetrix Electronics and suitable for automotive camera modules, RF tuner bias supplies, pre-boost power architectures, and in-cabin microphone systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MPQ3425DL-AEC1-LF-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 power management ICs, with over two decades of innovation in DC-DC conversion, motor drivers, and LED controllers.
The MPQ3425 belongs to MPS's automotive-grade boost converter product line, designed specifically for AEC-Q100-compliant applications demanding high efficiency, small footprint, and robust protection in harsh environments such as engine control, ADAS, and infotainment systems.
FAQ
What is the minimum input voltage required for MPQ3425DL-AEC1-LF-Z to operate?
The MPQ3425DL-AEC1-LF-Z requires a minimum BIAS supply voltage of 3.1V to power its internal LDO and gate driver. This is independent of the input voltage applied to the SW node. The device can generate output voltages up to 55V even when VIN is as low as 3V, provided BIAS is within specification and sufficient power is delivered through the inductor path.
How does the FSET pin determine switching frequency?
The FSET pin regulates its voltage to 0.5V and sinks current proportional to the selected resistor value (RFSET). The switching frequency is calculated as fSW ≈ 0.86 / RFSET (with RFSET in kΩ). For example, a 66.5kΩ resistor yields ~1.3MHz, while 143kΩ gives ~0.6MHz. The relationship is linear and validated across temperature.
Can MPQ3425DL-AEC1-LF-Z be used in SEPIC topology?
Yes - the MPQ3425DL-AEC1-LF-Z supports SEPIC configurations per its datasheet application notes. Its current-mode control, wide duty-cycle range, and ability to regulate with VIN near VOUT make it suitable for non-inverting buck-boost topologies where input may exceed output. External component selection must follow MPS-recommended guidelines for stability.
What is the purpose of separating AGND and PGND pins?
AGND provides a quiet analog reference for the error amplifier and feedback circuitry, while PGND carries high di/dt switching currents. Separating them prevents noise coupling into the feedback path. They must be connected to the same ground plane at a single point - ideally beneath the exposed pad - to maintain signal integrity without compromising thermal performance.
Is the 1.225V feedback reference trimmed across temperature?
Yes - the 1.225V reference has a guaranteed tolerance of ±25mV over the full operating junction temperature range (−40°C to +125°C), as confirmed in the Electrical Characteristics table. This tight drift ensures stable output regulation in automotive environments where ambient temperature swings exceed 100°C.
How does the soft-start capacitor affect startup behavior?
The soft-start capacitor (CSS) on the SS pin controls three distinct startup phases: at 250mV, the controller begins switching at ¼ fSW (frequency foldback); at 800mV, it ramps to full fSW; and at 2.5V, soft-start ends. This staged ramp limits inrush current and prevents output overshoot, especially critical in systems with large output capacitance.
Does MPQ3425DL-AEC1-LF-Z support synchronization to an external clock?
No - the MPQ3425DL-AEC1-LF-Z does not support external clock synchronization. Its oscillator is internally generated and programmable only via the FSET resistor. For synchronized multi-phase or noise-sensitive applications, designers must use frequency selection to avoid sensitive bands or consider alternative MPS parts like MPQ4312-AEC1.
MPQ3425DL-AEC1-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.1V
- Voltage - Input (Max):
- 22V
- Voltage - Output (Min/Fixed):
- 3.1V
- Voltage - Output (Max):
- 55V
- Current - Output:
- 3A
- Frequency - Switching:
- 300kHz ~ 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x4)
MPQ3425DL-AEC1-LF-Z FAQ
1.How can I place an order for MPQ3425DL-AEC1-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ3425DL-AEC1-LF-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 MPQ3425DL-AEC1-LF-Z reliable?
The price and inventory of MPQ3425DL-AEC1-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ3425DL-AEC1-LF-Z is usually 5 days.
3.What payment methods are accepted for MPQ3425DL-AEC1-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3425DL-AEC1-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ3425DL-AEC1-LF-Z?
MPQ3425DL-AEC1-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ3425DL-AEC1-LF-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 MPQ3425DL-AEC1-LF-Z?
For technical support, including MPQ3425DL-AEC1-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3425DL-AEC1-LF-Z requirements.
6.How does Aetrix verify that MPQ3425DL-AEC1-LF-Z is sourced from the original manufacturer or authorized distributors?
All MPQ3425DL-AEC1-LF-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 MPQ3425DL-AEC1-LF-Z meets industry standards.
7.What is the process for return or replacement of MPQ3425DL-AEC1-LF-Z?
All MPQ3425DL-AEC1-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3425DL-AEC1-LF-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 MPQ3425DL-AEC1-LF-Z part is unused and in its original packaging.
Return procedure for MPQ3425DL-AEC1-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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