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Monolithic Power Systems Inc. MPQ3425DL-LF-P
- Part No.:
- MPQ3425DL-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
MPQ3425DL-LF-P.pdf
- Description:
- IC REG BOOST ADJ 3A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,778
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Product details
Overview
MPQ3425DL-LF-P from Monolithic Power Systems is a current-mode, AEC-Q100 Grade 1 qualified boost converter IC with integrated 3.5A/90mΩ MOSFET, 3.1V–22V BIAS input range, 3V–50V VIN range, and programmable 300kHz–1MHz switching frequency. It delivers up to 55V output in automotive pre-boost and microphone bias applications.
For engineers reviewing the MPQ3425DL-LF-P datasheet, MPQ3425DL-LF-P pinout, MPQ3425DL-LF-P application, or MPQ3425DL-LF-P equivalent, key selection criteria include its programmable UVLO hysteresis, 1.225V FB reference, soft-start capacitor control (5μA constant current), thermal shutdown at 160°C, and QFN-14 (3mm×4mm) package with exposed thermal pad.
Technical Context
The MPQ3425DL-LF-P employs peak current-mode control with an internal transconductance error amplifier (GEA = 160 μA/V, AVEA = 300 V/V) and a 1.225V precision feedback reference. Its PWM comparator compares sensed switch current against COMP voltage to regulate output via duty cycle modulation.
Switching frequency is set linearly by FSET pin current (0.5V regulated, 84.5kΩ → 550kHz typical); soft-start is implemented via 5μA charging of external CSS to 2.5V; UVLO hysteresis is programmable using EN pin current sink (4μA) and external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | Up to 55V - supports high-side bias for automotive sensors and RF tuners. |
| Switch RDS(ON) | 90mΩ - enables ≥3.5A continuous output with low conduction loss at 125°C junction. |
| fSW Programmability | 300kHz–1MHz - allows EMI optimization and compact filter design with ceramic capacitors. |
| FB Reference Voltage | 1.225V ±25mV - enables precise output regulation with standard resistor dividers (e.g., 20kΩ/10kΩ for 3.675V). |
| Soft-Start Current | 5μA - sets controlled VCOMP ramp rate; tSS = 0.47ms per nF of CSS. |
| Thermal Shutdown | 160°C - protects die during overload or poor PCB thermal layout; auto-recovery on cooldown. |
| Quiescent Current | 650–950μA - ensures low standby power in always-on automotive modules. |
| UVLO Hysteresis | 250mV - prevents oscillation during brown-out; programmable via EN pin current sink (4μA). |
Pinout & Package
MPQ3425DL-LF-P is housed in a thermally enhanced QFN-14 (3mm × 4mm) package with an exposed pad soldered to PCB ground for optimal thermal resistance (θJC = 12°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 COMP | Error amplifier output | Connect RC network to AGND for loop compensation; sets pole/zero placement for stability. |
| 2 EN | Enable control input | Pull high ≥1.45V to enable; also programs UVLO hysteresis via 4μA current sink. |
| 3 BIAS | LDO supply input | Accepts 3.1V–22V; powers internal circuitry; requires local 0.1μF ceramic bypass. |
| 4,5,6 SW | Power switch drain | Three paralleled pins reduce trace inductance; connect directly to inductor and diode anode. |
| 7 VDD | Gate driver supply | Internal LDO output (6V); powers high-side driver; decouple with 10nF ceramic. |
| 8,9,10,EP PGND | Power ground | Multiple pins + exposed pad minimize ground bounce; must be solidly connected to thermal plane. |
| 11 AGND | Analog ground | Reference for FB, COMP, SS; tie to PGND only at single point near exposed pad. |
| 12 SS | Soft-start timing | 5μA current source charges external capacitor; controls startup inrush and frequency foldback. |
| 13 FB | Feedback input | 1.225V reference node; connect resistor divider from VOUT to set regulated output voltage. |
| 14 FSET | Frequency programming | 0.5V-regulated node; current out sets fSW linearly (e.g., 11.8μA → 550kHz). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for -40°C to +125°C ambient operation - validated for automotive infotainment and ADAS power rails. |
| Programmable UVLO hysteresis | Configurable via EN pin resistor - eliminates restart chatter during battery sag in vehicle start-stop cycles. |
| Micropower shutdown | <1μA IIN - enables ultra-low-power sleep mode in telematics and remote keyless entry systems. |
| External compensation | Full control over loop dynamics - supports stable operation with low-ESR ceramic output capacitors down to 4.7μF. |
| Fast transient response | Current-mode architecture with 100ns minimum on-time - maintains regulation during 2.5A/μs load steps. |
| Thermal protection with auto-recovery | 160°C OTP with hysteresis - prevents permanent damage while allowing graceful recovery after thermal stress. |
Applications
| Automotive Camera Power Supply | RF Tuner Bias Generator |
|---|---|
|
Use Scenario: Powers 12V–48V image sensor modules in rear-view and surround-view cameras. IC Role / Device Role / Timing Role: Boost converter regulating stable 48V rail from 12V battery; handles cold-crank dips to 6V. Use Value: AEC-Q100 qualification ensures reliability across temperature extremes; programmable fSW avoids AM band interference. |
Use Scenario: Generates 24V–36V bias for automotive FM/AM/DAB tuner front-ends. IC Role / Device Role / Timing Role: High-efficiency pre-boost stage delivering low-noise DC from 5V/12V domain. Use Value: 90mΩ RDS(ON) and ceramic-capable design minimize ripple (<50mVPP) critical for signal integrity. |
| Microphone Bias for In-Cabin Audio | Industrial Sensor Excitation |
|
Use Scenario: Supplies 5V–15V bias to MEMS microphones in noise-cancelling head units and voice assistants. IC Role / Device Role / Timing Role: Low-quiescent-current boost regulator enabling always-on audio wake-word detection. Use Value: 650μA IQ and <1μA shutdown current extend battery life in portable diagnostic tools. |
Use Scenario: Provides 10V–30V excitation voltage for piezoresistive pressure sensors in engine control units. IC Role / Device Role / Timing Role: Precision voltage source with 1.225V FB reference and <±1% output tolerance over temp. Use Value: Programmable soft-start prevents mechanical shock to sensitive transducers during power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ3425DG-LF-Z | Same silicon, QFN-14 package without AEC-Q100 qualification; identical electrical specs. | Targeted at industrial/commercial designs where automotive reliability testing is not required. | Select when cost sensitivity outweighs automotive qualification needs and ambient temp stays ≤105°C. |
| LM5122MQ/NOPB | Higher 65V max output, but larger HTSSOP-20 package; no integrated MOSFET - requires external 3.5A switch. | Suitable for higher-power (>5W) or multi-rail designs needing independent gate drive control. | Choose when output >55V or thermal management via discrete FET is preferred over monolithic integration. |
Compared with MPQ3425DL-LF-P, MPQ3425DG-LF-Z offers identical performance at lower cost without AEC-Q100 validation, while LM5122MQ/NOPB trades integration for flexibility in high-voltage or high-current scaling - making MPQ3425DL-LF-P optimal for space-constrained, automotive-grade 3A boost nodes.
Availability
MPQ3425DL-LF-P is available at Aetrix Electronics and suitable for automotive camera power supplies, RF tuner bias generation, in-cabin microphone bias, and industrial sensor excitation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MPQ3425DL-LF-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, founded in 1997 and headquartered in Kirkland, Washington.
The MPQ3425 belongs to MPS's automotive-qualified DC/DC converter product line, designed specifically for reliable, low-noise, high-efficiency voltage boosting in safety-critical vehicle subsystems operating from -40°C to +125°C.
FAQ
What is the maximum output voltage achievable with MPQ3425DL-LF-P?
The MPQ3425DL-LF-P supports up to 55V output voltage, limited by its internal switch breakdown rating and absolute maximum SW pin voltage of +55V. Operation above 50V requires careful attention to layout parasitics and external diode reverse voltage rating.
Can MPQ3425DL-LF-P operate from a 3.3V input source?
Yes - the device operates with input voltages as low as 3V when supplied via the BIAS pin (3.1V–22V range). For 3.3V-only systems, connect VIN to BIAS and ensure sufficient current capability from the 3.3V rail to support peak switch current.
How is switching frequency programmed on the FSET pin?
FSET regulates to 0.5V internally; connecting a resistor RFSET from FSET to AGND sets fSW linearly: fSW(MHz) ≈ 0.86 / (RFSET in kΩ). For example, 66.5kΩ yields ~1.06MHz, while 143kΩ yields ~0.32MHz.
What is the purpose of the exposed thermal pad on the QFN-14 package?
The exposed pad is electrically and thermally connected to PGND. Soldering it to a large PCB copper pour reduces θJA from 50°C/W to ~35°C/W, enabling 2.5W continuous dissipation at 25°C ambient and preventing thermal shutdown under full 3.5A load.
Does MPQ3425DL-LF-P support SEPIC topology?
Yes - the datasheet explicitly lists SEPIC as a supported application. The IC's current-mode control, wide input/output range, and robust SW pin rating allow stable operation in SEPIC configurations with appropriate transformer coupling and compensation.
How does the soft-start function interact with frequency foldback?
During soft-start, VSS ramps from 0V to 2.5V. At 250mV, switching begins at ¼ of programmed fSW (frequency foldback); at 800mV, fSW rises linearly to full value; full regulation occurs only after VSS reaches 2.5V.
Is the FB reference voltage trimmed across temperature?
Yes - the 1.225V reference has guaranteed accuracy of ±25mV (±2%) from -40°C to +125°C, with typical drift <±10mV over temperature, enabling stable output regulation without external trimming.
MPQ3425DL-LF-P 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x4)
MPQ3425DL-LF-P FAQ
1.How can I place an order for MPQ3425DL-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ3425DL-LF-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 MPQ3425DL-LF-P reliable?
The price and inventory of MPQ3425DL-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ3425DL-LF-P is usually 5 days.
3.What payment methods are accepted for MPQ3425DL-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3425DL-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ3425DL-LF-P?
MPQ3425DL-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ3425DL-LF-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 MPQ3425DL-LF-P?
For technical support, including MPQ3425DL-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3425DL-LF-P requirements.
6.How does Aetrix verify that MPQ3425DL-LF-P is sourced from the original manufacturer or authorized distributors?
All MPQ3425DL-LF-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 MPQ3425DL-LF-P meets industry standards.
7.What is the process for return or replacement of MPQ3425DL-LF-P?
All MPQ3425DL-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3425DL-LF-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 MPQ3425DL-LF-P part is unused and in its original packaging.
Return procedure for MPQ3425DL-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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