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Monolithic Power Systems Inc. MP4462DQ-LF-P
- Part No.:
- MP4462DQ-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP4462DQ-LF-P.pdf
- Description:
- IC REG BUCK ADJ 3.5A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,437
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Product details
Overview
MP4462DQ-LF-P from Monolithic Power Systems is a 3.5A, 4MHz, 36V non-synchronous step-down DC/DC converter with integrated 150mΩ high-side MOSFET, 120µA quiescent current, and programmable switching frequency. It delivers regulated output from 0.8V to 30V in automotive and industrial power systems requiring wide-input, high-efficiency conversion.
For engineers reviewing the MP4462DQ-LF-P datasheet, MP4462DQ-LF-P pinout, MP4462DQ-LF-P application, or MP4462DQ-LF-P equivalent, key selection criteria include input voltage range (3.8–36V), internal current limit (4.7A typ), thermal shutdown threshold (150°C), FREQ pin programmability, and QFN10 package thermal performance.
Technical Context
The MP4462DQ-LF-P implements peak current-mode control with internal soft-start, UVLO (3.0V rising threshold), and frequency foldback at light load to maintain stability and efficiency. Its error amplifier features 200V/V gain and 60µA/V transconductance, enabling fast transient response with external RC compensation on the COMP pin.
It uses a bootstrap-driven high-side MOSFET with dedicated BST pin, requiring an external capacitor between BST and SW. The FREQ pin accepts a resistor to ground for precise switching frequency setting (e.g., 45kΩ → 2MHz; 18kΩ → 4MHz), supporting EMI-sensitive applications like AM radio and ADSL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 36V - supports direct connection to 12V/24V automotive batteries and industrial rails without pre-regulation. |
| Output Current | 3.5A continuous - enables single-chip power delivery for mid-power microcontrollers, sensors, and interface ICs. |
| Switching Frequency | Up to 4MHz - allows use of small inductors (e.g., 2.2µH) and reduces solution size for space-constrained designs. |
| Quiescent Current | 120µA - extends battery life in always-on or low-duty-cycle portable and telematics applications. |
| Feedback Reference | 0.8V ±2.4% - enables accurate output regulation down to sub-1V levels with standard resistor dividers. |
| Internal MOSFET RDS(on) | 150mΩ - minimizes conduction loss at full load, improving efficiency especially at 12V input / 3.3V output. |
| Thermal Shutdown | 150°C with 15°C hysteresis - provides fault-tolerant protection during overload or poor PCB thermal design. |
Pinout & Package
MP4462DQ-LF-P is housed in a thermally enhanced 3×3mm QFN10 package with exposed pad for optimal heat dissipation. The package supports reflow soldering and meets RoHS compliance (LF suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch Node | Drives external inductor; requires low-forward-drop Schottky diode to GND and tight layout to minimize ringing. |
| EN (Pin 3) | Enable Input | Positive logic control: >1.5V enables, <1.2V disables; internal 1µA pull-up allows floating-enable operation. |
| COMP (Pin 4) | Error Amplifier Output | Connects external RC network to set loop bandwidth, phase margin, and transient response per application requirements. |
| FB (Pin 5) | Feedback Input | Senses scaled output voltage; internal 0.8V reference sets VOUT = 0.8V × (1 + R1/R2) with precision resistive divider. |
| GND (Pin 6) | Ground / Exposed Pad | Primary return path for high-current switch node; exposed pad must be soldered to large PCB GND plane for thermal and EMI control. |
| FREQ (Pin 7) | Frequency Programming | Resistor to GND sets fSW: 18kΩ → 4MHz; enables EMI optimization and inductor size reduction. |
| VIN (Pins 8,9) | Input Supply | Power source for internal regulators and gate drivers; requires local 10µF ceramic decoupling close to pins. |
| BST (Pin 10) | Bootstrap Supply | Charges external capacitor (BST–SW) to ~5V for high-side driver; critical for proper MOSFET turn-on above 50% duty cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Ceramic capacitor stable | Supports low-ESR ceramic output capacitors without external compensation tweaks-reduces BOM count and board area. |
| Internally set current limit | 4.7A typical cycle-by-cycle limit eliminates need for external sense resistor, saving cost and layout space. |
| Internal soft-start | 1.5ms built-in ramp prevents output overshoot during power-up, eliminating need for external timing components. |
| Frequency foldback at light load | Reduces switching frequency under low load to maintain >85% efficiency down to 1mA, extending battery runtime. |
| UVLO with hysteresis | 3.0V turn-on / 2.6V turn-off threshold prevents oscillation near brown-out conditions in automotive environments. |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
Use Scenario: Powering 3.3V/1.8V rails for MCU, display controller, and audio codec in head unit or ADAS camera module. IC Role / Device Role / Timing Role: Primary step-down regulator converting 9–16V battery to stable low-voltage rails with fast load transient response. Use Value: 4MHz operation avoids AM band interference; 120µA IQ supports stop-start vehicle mode without battery drain. | Use Scenario: Providing 5V/3.3V supply to wireless sensor nodes (LoRaWAN, NB-IoT) operating from 12–24V field bus or solar-charged battery. IC Role / Device Role / Timing Role: High-input buck converter delivering regulated output across wide temperature (–40°C to +125°C) and input variation. Use Value: 36V absolute max rating and thermal shutdown ensure reliability in unregulated industrial environments. |
| Portable Medical Device Power | Distributed Telecom Power |
Use Scenario: Generating 3.3V for microcontroller and analog front-end in handheld diagnostic tools powered by Li-ion battery packs. IC Role / Device Role / Timing Role: Efficient primary regulator with ultra-low quiescent current to maximize battery life between charges. Use Value: 120µA IQ enables multi-week standby; 0.8V feedback reference supports precise low-voltage rail generation. | Use Scenario: Point-of-load conversion in base station remote radio units (RRUs) where 24V/48V backplane supplies 5V/3.3V for FPGA and SerDes. IC Role / Device Role / Timing Role: Compact, high-frequency buck converter minimizing inductor volume in dense RF modules. Use Value: 4MHz capability allows use of 2.2µH inductors (<7.5mm² footprint), reducing solution height and EMI filter complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4462DQ-LF-Z | Automotive-grade AEC-Q100 qualified version; identical electrical specs but extended temp range (–40°C to +125°C) and enhanced HTOL testing. | Required for automotive safety-critical systems (e.g., ADAS, body control); not needed for industrial or consumer use. | Select MPQ4462DQ-LF-Z only when AEC-Q100 compliance is mandated; otherwise MP4462DQ-LF-P offers same performance at lower cost. |
| LM61480RQR | 4.5A rated, 2.1MHz fixed-frequency, no FREQ pin; higher IQ (15µA in shutdown, 40µA active); requires external current sense resistor. | Better suited for high-current, fixed-frequency designs where programmability and ultra-low IQ are secondary. | Choose LM61480RQR if >3.5A output or TI ecosystem preference dominates; MP4462DQ-LF-P wins for EMI-sensitive, battery-powered, or compact-layout designs. |
Compared with MPQ4462DQ-LF-Z, the MP4462DQ-LF-P lacks AEC-Q100 qualification but matches all electrical and thermal specs for non-automotive use; versus LM61480RQR, it offers superior frequency flexibility, lower quiescent current, and integrated current limiting-critical for space- and power-constrained applications.
Availability
MP4462DQ-LF-P is available at Aetrix Electronics and suitable for automotive infotainment power, industrial sensor node supply, and portable medical device power requiring stable component supply, RoHS-compliant packaging, and QFN10 thermal performance.
Supply support for MP4462DQ-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 analog and power ICs, with core expertise in DC/DC conversion, LED drivers, and motor control.
The MP4462 belongs to MPS's high-frequency buck converter product line, designed specifically for compact, efficient, and EMI-robust power delivery in automotive, industrial, and battery-powered systems.
FAQ
What is the minimum recommended input voltage for reliable startup?
The MP4462DQ-LF-P has a VIN UVLO rising threshold of 3.0V. Reliable startup requires VIN ≥ 3.0V; however, stable regulation begins at 3.8V per datasheet operating conditions. Below 3.8V, output may drop out or exhibit instability due to insufficient headroom for internal regulators.
Can the MP4462DQ-LF-P operate without an external bootstrap diode?
Yes-the MP4462DQ-LF-P uses an internal bootstrap charging circuit that regulates BST to ~5V using VIN and SW. No external diode is required unless operating at very high duty cycles (>90%) where bootstrap capacitor recharge time becomes marginal; in standard 3.3V/5V outputs, the internal scheme suffices.
How does frequency foldback improve light-load efficiency?
At light loads, the MP4462DQ-LF-P automatically reduces switching frequency to lower gate-driving and switching losses. This maintains >85% efficiency down to ~1mA load-critical for battery-powered applications where standby current directly impacts runtime.
What is the maximum allowable output voltage ripple with ceramic output capacitors?
With ceramic output capacitors (dominant capacitive impedance), output ripple is calculated as ΔVOUT ≈ (VOUT/VIN) × (1 – VOUT/VIN) × VOUT / (8 × fSW² × L × COUT). For 12V→3.3V @ 4MHz, 10µH, 22µF: ripple is typically <15mVpp under full load.
Is the COMP pin internally clamped, and what are the safe voltage limits?
Yes-COMP is clamped between 0.9V (min) and 2.0V (max) during normal operation, and pulled to GND in shutdown. Do not drive COMP above 2.6V, as this exceeds absolute maximum rating and risks damage to the error amplifier output stage.
Does the MP4462DQ-LF-P support forced PWM mode?
No-it operates in peak current-mode control with automatic pulse-skipping at light load. There is no pin or register to force continuous conduction mode (CCM); frequency foldback and pulse skipping are inherent to its architecture for optimized light-load efficiency.
What thermal resistance values apply to the QFN10 package in standard layout?
For the MP4462DQ-LF-P in 3×3mm QFN10 on a 4-layer JEDEC JESD51-7 PCB, θJA = 50°C/W and θJC = 12°C/W. Achieving these requires full soldering of the exposed pad to a ≥1cm² internal GND plane with ≥4 thermal vias.
MP4462DQ-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.8V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 30V
- Current - Output:
- 3.5A
- Frequency - Switching:
- Up to 4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP4462DQ-LF-P FAQ
1.How can I place an order for MP4462DQ-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4462DQ-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 MP4462DQ-LF-P reliable?
The price and inventory of MP4462DQ-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 MP4462DQ-LF-P is usually 5 days.
3.What payment methods are accepted for MP4462DQ-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4462DQ-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4462DQ-LF-P?
MP4462DQ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4462DQ-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 MP4462DQ-LF-P?
For technical support, including MP4462DQ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4462DQ-LF-P requirements.
6.How does Aetrix verify that MP4462DQ-LF-P is sourced from the original manufacturer or authorized distributors?
All MP4462DQ-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 MP4462DQ-LF-P meets industry standards.
7.What is the process for return or replacement of MP4462DQ-LF-P?
All MP4462DQ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4462DQ-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 MP4462DQ-LF-P part is unused and in its original packaging.
Return procedure for MP4462DQ-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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