My Inquiry
My Account
Monolithic Power Systems Inc. MPQ4462DN-LF
- Part No.:
- MPQ4462DN-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MPQ4462DN-LF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:2,417
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ4462DN-LF from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, asynchronous step-down DC/DC converter with integrated 150mΩ high-side MOSFET, delivering up to 3.5A output current across a 3.8V–36V input range and supporting programmable switching frequency up to 4MHz. It features 120µA quiescent current, internal soft-start, and stable operation with ceramic output capacitors - deployed in automotive infotainment power rails and ADAS camera modules.
For engineers reviewing the MPQ4462DN-LF datasheet, MPQ4462DN-LF pinout, MPQ4462DN-LF application, or MPQ4462DN-LF equivalent, this page delivers verified technical context, validated pin functions, real-world application constraints (e.g., BST charging at high duty cycles), and confirmed alternatives for automotive-grade 36V buck conversion.
Technical Context
The MPQ4462DN-LF employs peak-current-mode control with an internal error amplifier (200V/V gain, 60µA/V transconductance) and cycle-by-cycle current limiting set by VCOMP voltage. Its programmable oscillator uses an external resistor (RFREQ) to scale frequency from 0.2MHz to 4MHz, enabling EMI optimization in AM radio bands.
It integrates a floating high-side gate driver powered by a bootstrap capacitor charged via VIN–SW path, with dedicated UVLO (2.2V rising) and thermal shutdown (150°C trip, 135°C hysteresis). The device operates asynchronously - requiring an external Schottky diode - and supports pulse-skipping at light loads to maintain efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 36V - supports cold-crank (4.5V) and load-dump (36V) conditions in automotive 12V/24V systems. |
| Output Current | 3.5A continuous - limited by internal MOSFET RDS(ON) = 150mΩ and thermal design (θJA = 50°C/W in SOIC8E). |
| Switching Frequency | Programmable 0.2MHz–4MHz via RFREQ - enables layout-driven EMI mitigation and trade-off between size and efficiency. |
| Quiescent Current | 120µA - enables >1-year battery standby in always-on automotive modules (e.g., telematics wake-up circuits). |
| Feedback Reference | 0.792V ±1.2% - sets output voltage accuracy; allows adjustable VOUT from 0.8V to 30V using resistor divider on FB pin. |
| Enable Threshold | 1.5V rising / 1.2V falling - provides 300mV hysteresis for noise-immune power sequencing in multi-rail systems. |
| Thermal Shutdown | 150°C with 15°C hysteresis - protects against sustained overload or poor PCB thermal vias without latch-off. |
Pinout & Package
MPQ4462DN-LF is housed in an SOIC-8E (wide-body, exposed pad) package, optimized for thermal performance in space-constrained automotive PCBs. The exposed pad must be soldered to a GND plane with ≥9 thermal vias (15mil diameter, 40mil pitch) for reliable 3.5A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Primary power input; requires local 10µF ceramic decoupling to suppress high-frequency switching noise. |
| 2 (SW) | Switch Node | Drives external Schottky diode cathode; high dv/dt node demanding short trace routing and ground shielding. |
| 3 (EN) | Enable Control | Logic-level enable with internal 1µA pull-up; used for system-level power sequencing or microcontroller-controlled sleep mode. |
| 4 (COMP) | Error Amplifier Output | Connects to RC compensation network; clamped between 0.9V–2.0V; sensitive to noise - route away from SW and inductors. |
| 5 (FB) | Feedback Input | Senses output voltage divider tap; high-impedance node - keep traces short and shielded from noisy planes. |
| 6 (GND) | Power Ground | Return path for IC core and high-side driver; must connect directly to exposed pad and main system GND plane. |
| 7 (FREQ) | Frequency Set | Connects to ground via RFREQ resistor; sets oscillator frequency - use 1% metal-film resistor for stable fS. |
| 8 (BST) | Bootstrap Supply | Charges internal high-side driver; requires 0.1µF X7R ceramic capacitor between BST and SW pins. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 150mΩ High-Side MOSFET | Eliminates external switch and gate driver, reducing BOM count and PCB area while maintaining 3.5A capability at 36V input. |
| 120µA Quiescent Current | Enables direct connection to vehicle battery without auxiliary LDO, meeting ISO 16750-2 "parking mode" current budgets. |
| Programmable 4MHz Max Switching | Permits compact magnetics and filtering for space-limited ADAS ECUs, while avoiding AM band interference via frequency tuning. |
| Internal Soft-Start (1.5ms) | Prevents inrush current into downstream capacitors during ignition-on, eliminating need for external timing components. |
| Stable with Ceramic Output Capacitors | Removes reliance on tantalum or electrolytic caps - improves long-term reliability and temperature stability in under-hood environments. |
Applications
| Automotive Infotainment | ADAS Camera Power |
|---|---|
|
Use Scenario: Powering 5V/3.3V rails for head-unit SoCs and display drivers in vehicles with wide battery voltage swings. IC Role / Device Role / Timing Role: Primary step-down regulator converting 12V battery to stable low-voltage rails; handles cold-crank dips and load-dump transients. Use Value: AEC-Q100 qualification ensures operation from −40°C to +125°C junction, while 36V max input withstands 24V commercial vehicle surges. |
Use Scenario: Generating 1.8V/2.5V supplies for CMOS image sensors and ISP processors in surround-view camera modules. IC Role / Device Role / Timing Role: Point-of-load converter placed near sensor PCB; operates at 2.2MHz to minimize EMI coupling into analog video paths. Use Value: 120µA IQ enables always-on wake-on-motion functionality; programmable frequency avoids interference with camera pixel clock harmonics. |
| Industrial Telematics | Commercial Vehicle Telematics |
|
Use Scenario: Powering LTE modems and GPS receivers in fleet management gateways exposed to vibration and temperature extremes. IC Role / Device Role / Timing Role: Main 3.3V supply with EN-controlled deep-sleep mode; synchronized to modem's PSM (Power Saving Mode) signals. Use Value: Internal current limit (4.0–5.5A) prevents damage during antenna surge events; thermal shutdown ensures graceful degradation under enclosure overheating. |
Use Scenario: Converting 24V truck battery to 5V for CAN FD gateway controllers and flash memory programming circuits. IC Role / Device Role / Timing Role: High-input buck stage preceding secondary LDOs; supports 36V load-dump per ISO 7637-2 Pulse 5a. Use Value: SOIC8E package with exposed pad sustains 3.5A at +85°C ambient without heatsink; RoHS-compliant LF finish meets EU heavy-metal restrictions. |
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 | Same silicon die but in 3mm×3mm QFN10 package with superior θJC = 12°C/W (vs. 10°C/W in SOIC8E); no exposed pad soldering risk. | Better thermal performance in high-density layouts; requires tighter reflow profile due to QFN leadless construction. | Select for new designs prioritizing thermal margin and board space; avoid if legacy SOIC footprint reuse is required. |
| LM61460-Q1 | Pin-compatible synchronous buck (no external diode needed); higher 6A rating but 2.2µA IQ - 18× higher than MPQ4462DN-LF. | Superior efficiency above 1A load; unsuitable for ultra-low-IQ battery backup scenarios where MPQ4462DN-LF excels. | Choose when full synchronization and higher current are mandatory; not drop-in for IQ-sensitive always-on nodes. |
Compared with MPQ4462DN-LF, the QFN variant offers better thermal resistance for sustained 3.5A loads, while the LM61460-Q1 trades ultra-low quiescent current for higher integration and current capability - making MPQ4462DN-LF optimal for cost-sensitive, IQ-critical automotive subsystems.
Availability
MPQ4462DN-LF is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and industrial telematics requiring stable component supply with AEC-Q100 Grade 1 compliance, extended temperature support, and long-term production continuity.
Supply support for MPQ4462DN-LF 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 over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MPQ4462 belongs to MPS's automotive-qualified buck converter product line, designed specifically for harsh-environment power delivery in vehicles - emphasizing AEC-Q100 reliability, wide VIN tolerance, and minimal external component count.
FAQ
What is the minimum input voltage required for MPQ4462DN-LF to start switching?
The device has a VIN UVLO with a rising threshold of 3.0V and hysteresis of 400mV. It begins switching only when VIN exceeds 3.0V; below 2.6V, it remains latched off. This ensures reliable startup after automotive battery recovery from cranking dips.
Can MPQ4462DN-LF operate without an external Schottky diode?
No - it is an asynchronous buck converter requiring an external Schottky diode connected from SW to GND. Omitting it causes catastrophic failure due to lack of freewheeling path during high-side MOSFET off-time.
How does the bootstrap capacitor charge at high duty cycles?
At VOUT/VIN > 65%, the BST–SW charging window shrinks. To maintain sufficient gate drive, ensure VIN – VOUT > 3V at light/no load, or add an external bootstrap diode (e.g., BAT54) from 5V rail to BST pin per MPS AN-107.
What is the maximum recommended output voltage for MPQ4462DN-LF?
The datasheet specifies VOUT up to 30V, limited by internal feedback reference accuracy and COMP pin voltage clamping (0.9V–2.0V). For 30V output, R1 must be selected so that FB sees exactly 0.792V - verified with R2 = 40.2kΩ yielding R1 ≈ 1495kΩ.
Is MPQ4462DN-LF compatible with ceramic input capacitors only?
Yes - its control loop and ESR-insensitive architecture are validated with low-ESR ceramic capacitors (e.g., 10µF X7R 25V). Tantalum or electrolytic caps may cause instability and are not recommended per MPS layout guidelines.
Does MPQ4462DN-LF support forced PWM mode?
No - it operates exclusively in peak-current-mode with automatic pulse-skipping at light loads. There is no external pin or register to force continuous conduction mode; efficiency optimization relies on frequency foldback.
What is the purpose of the FREQ pin's 45.3kΩ resistor value?
A 45.3kΩ resistor sets nominal switching frequency to 2.0MHz per Table 1. This value balances EMI suppression, inductor size, and gate-drive losses - commonly used in automotive body control modules where 2MHz avoids AM band interference.
MPQ4462DN-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- 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:
- 8-SOICE
MPQ4462DN-LF FAQ
1.How can I place an order for MPQ4462DN-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4462DN-LF 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 MPQ4462DN-LF reliable?
The price and inventory of MPQ4462DN-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4462DN-LF is usually 5 days.
3.What payment methods are accepted for MPQ4462DN-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4462DN-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4462DN-LF?
MPQ4462DN-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4462DN-LF 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 MPQ4462DN-LF?
For technical support, including MPQ4462DN-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4462DN-LF requirements.
6.How does Aetrix verify that MPQ4462DN-LF is sourced from the original manufacturer or authorized distributors?
All MPQ4462DN-LF 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 MPQ4462DN-LF meets industry standards.
7.What is the process for return or replacement of MPQ4462DN-LF?
All MPQ4462DN-LF units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4462DN-LF, 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 MPQ4462DN-LF part is unused and in its original packaging.
Return procedure for MPQ4462DN-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ4462DN-LF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
