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Monolithic Power Systems Inc. MP4460DQ-LF-P
- Part No.:
- MP4460DQ-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP4460DQ-LF-P.pdf
- Description:
- IC REG BUCK ADJ 2.5A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,113
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Product details
Overview
MP4460DQ-LF-P from Monolithic Power Systems is a non-synchronous step-down DC/DC converter with integrated 150mΩ high-side MOSFET, delivering up to 2.5A output current across a 3.8V–36V input range, programmable 4MHz switching frequency, and 0.8V–30V adjustable output voltage. It serves as primary power regulation in automotive infotainment, industrial sensors, and battery-powered telemetry systems.
For engineers reviewing the MP4460DQ-LF-P datasheet, MP4460DQ-LF-P pinout, MP4460DQ-LF-P application, or MP4460DQ-LF-P equivalent, key selection criteria include its 120µA quiescent current for low-power operation, internal soft-start for controlled startup, frequency foldback during light load, thermal shutdown at 150°C, and ceramic-capacitor stability without external current-sense resistors.
Technical Context
The MP4460DQ-LF-P uses peak current-mode control with an internal error amplifier (200 V/V gain, 60 µA/V transconductance) and a programmable oscillator set via resistor on FREQ pin. Its PWM cycle initiates from an internal clock, with minimum on/off times of 100 ns each to maintain timing integrity at 4MHz operation.
It integrates a bootstrap regulator for high-side gate drive, requiring external BST–SW capacitor charging during SW low periods. The device implements UVLO (3.0V rising threshold), precision enable logic (1.5V EN high threshold), and internal current limiting (3.5A typical) without sensing resistors-enabling compact, high-efficiency buck designs in space-constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 36V - supports direct connection to automotive battery (cold-crank tolerant down to 3.8V) and industrial 24V rails. |
| Output Current | 2.5A continuous - sufficient for powering microcontrollers, CAN transceivers, and analog front-ends without external current boosting. |
| Switching Frequency | Up to 4MHz - enables use of small inductors (e.g., 2.2µH) and reduces EMI in AM radio-sensitive applications. |
| Quiescent Current | 120µA - extends battery life in always-on IoT nodes and remote sensors operating from coin cells or Li-SOCl₂. |
| Feedback Reference | 0.8V ±2.4% - allows precise output regulation from 0.8V (e.g., core voltage for low-power MCUs) up to 30V (industrial bias rails). |
| Internal MOSFET RDS(on) | 150mΩ - minimizes conduction loss at full load, enabling >90% efficiency at 12V→3.3V/2A without heatsinking. |
| Thermal Shutdown | 150°C with 15°C hysteresis - provides fault-tolerant protection during overload or poor PCB thermal design. |
Pinout & Package
MP4460DQ-LF-P is housed in a thermally enhanced 3mm × 3mm QFN-10 package with exposed thermal pad on underside for efficient heat dissipation in high-power-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Switch Node | High-current output of internal MOSFET; connects directly to inductor and Schottky diode cathode - requires tight layout to minimize ringing. |
| 3 EN | Enable Input | Positive-logic control pin with 1.5V rising threshold; floating state enables device via internal 1µA pull-up - supports system-level power sequencing. |
| 4 COMP | Compensation Node | Error amplifier output; accepts RC network to set loop bandwidth and phase margin - critical for stability with ceramic output capacitors. |
| 5 FB | Feedback Input | Monitors scaled output voltage via resistive divider; compares against 0.8V reference to regulate VOUT - sets output accuracy and transient response. |
| 6 GND | Power Ground | Main return path for high-switching-current loops; must be connected near output capacitor to reduce noise coupling into control circuitry. |
| 7 FREQ | Frequency Programming | Resistor-to-ground sets switching frequency (e.g., 45kΩ = 2MHz, 18kΩ = 4MHz); enables EMI optimization and inductor size reduction. |
| 8, 9 VIN | Input Supply | Primary power input for control circuitry and high-side driver; requires local 10µF ceramic decoupling to suppress high-frequency ripple. |
| 10 BST | Bootstrap Supply | Charges external BST–SW capacitor to ~5V; powers floating gate driver - mandates low-ESR ceramic capacitor (e.g., 0.1µF X7R) placed adjacent to pins. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High-Side MOSFET | 150mΩ RDS(on) eliminates external switch and driver, reducing BOM count and PCB area by >30% vs discrete buck solutions. |
| Programmable Switching Frequency | Configurable from 0.2MHz to 4MHz using single resistor - enables trade-off between efficiency (low fSW) and component size (high fSW). |
| Internal Soft-Start | 1.5ms ramp time prevents output overshoot during power-up - eliminates need for external soft-start circuitry in battery-powered devices. |
| Ceramic-Capacitor Stable | No external current-sense resistor required; supports low-ESR ceramic output caps (e.g., 22µF X5R) without oscillation risk. |
| Light-Load Frequency Foldback | Reduces switching frequency under light load to maintain >85% efficiency down to 1mA - critical for standby power compliance in automotive ECUs. |
Applications
| Automotive Infotainment | Industrial Sensor Node |
|---|---|
|
Use Scenario: Powering display controller, audio codec, and Bluetooth module in vehicle head unit with 12V/24V battery input. IC Role / Device Role / Timing Role: Primary buck regulator converting raw battery voltage to stable 3.3V/1.8V rails with fast transient response to handle burst data transmission. Use Value: 4MHz operation avoids AM band interference; 120µA quiescent current meets ISO 16750-2 sleep-mode requirements (<100µA). |
Use Scenario: Providing regulated 5V and 3.3V supplies for wireless temperature/humidity sensor node powered by two AA batteries. IC Role / Device Role / Timing Role: Main power management IC enabling multi-year battery life via ultra-low IQ and automatic light-load frequency scaling. Use Value: 3.8V minimum input allows operation until battery depletes to ~1.9V/cell; internal current limit protects against shorted sensor outputs. |
| Distributed Power System | Telematics Control Unit |
|
Use Scenario: Local point-of-load conversion in 48V telecom rack, stepping down to 12V for fan controllers and interface ICs. IC Role / Device Role / Timing Role: Secondary buck stage after front-end isolation, handling dynamic load steps up to 2A with <50µs recovery. Use Value: 36V absolute max input withstands 48V rail transients; QFN-10 package enables dense placement near load components. |
Use Scenario: Powering GPS receiver, cellular modem, and CAN controller in fleet tracking device with automotive-grade input conditioning. IC Role / Device Role / Timing Role: Robust primary regulator supporting cold-crank (4.5V) and load-dump (40V) conditions per ISO 7637-2. Use Value: 40V absolute max VIN and thermal shutdown ensure reliability in harsh under-hood environments; EN pin enables firmware-controlled power cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | Synchronous rectification, 3.5A rating, fixed 2.1MHz fSW, no FREQ pin - higher efficiency at light load but less EMI flexibility. | Preferred where >92% efficiency at 10mA is mandatory; unsuitable for AM-band-sensitive designs due to fixed frequency. | Select LM61480RQWR when synchronous operation and tighter light-load efficiency outweigh programmability needs. |
| TPS54360BDDAR | Non-synchronous, 3.5A, 100kHz–2.5MHz programmable fSW, wider 3.5V–60V input - lower max frequency limits inductor miniaturization. | Better for high-input-voltage industrial systems (>36V), but cannot achieve 4MHz for ultra-compact designs. | Choose TPS54360BDDAR when input exceeds 36V or when legacy 100kHz–2.5MHz frequency range suffices. |
Compared with LM61480RQWR and TPS54360BDDAR, MP4460DQ-LF-P uniquely balances 4MHz programmability, 36V input, and ultra-low IQ - making it optimal for space-constrained, EMI-sensitive, battery-backed automotive and IoT applications where synchronous efficiency gains are secondary to size and spectral control.
Availability
MP4460DQ-LF-P is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor nodes, and telematics control units requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP4460DQ-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 over 20 years of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP4460 belongs to MPS's high-voltage buck converter product line, designed specifically for automotive, industrial, and battery-powered applications demanding wide input range, low quiescent current, and compact footprint.
FAQ
What is the maximum recommended input voltage for reliable 4MHz operation?
The MP4460DQ-LF-P supports 4MHz switching only up to 12V input under typical conditions, as specified in Figure 2 of the datasheet. At 24V input, maximum recommended frequency drops to 2MHz to avoid minimum on-time violation and pulse-skipping instability. Exceeding these limits risks erratic regulation and reduced efficiency.
Can MP4460DQ-LF-P operate without an external bootstrap diode?
Yes - the MP4460DQ-LF-P uses an internal bootstrap regulator that charges the BST capacitor through VIN during SW low periods. An external bootstrap diode is optional and only recommended for high-duty-cycle applications (>85%) where internal charging may be insufficient; standard operation at ≤80% duty cycle requires only the BST–SW ceramic capacitor.
How does the internal current limit function without a sense resistor?
The MP4460DQ-LF-P employs a matched current-sense MOSFET integrated alongside the main power switch. This structure provides accurate cycle-by-cycle current limiting at 3.5A typical without external components, eliminating board space and tolerance errors associated with discrete sense resistors while maintaining ±10% current limit accuracy over temperature.
Is the MP4460DQ-LF-P qualified for automotive AEC-Q100?
No - the MP4460DQ-LF-P is not AEC-Q100 qualified. It is rated for industrial temperature range (–40°C to +125°C) and meets RoHS and lead-free requirements, but lacks automotive-specific stress testing and failure analysis documentation. For AEC-Q100 applications, consider MPS's pin-compatible MPQ4460 series.
What output capacitor ESR range ensures stable operation?
The MP4460DQ-LF-P is optimized for ceramic capacitors with ESR < 10mΩ (e.g., X5R/X7R 22µF). For tantalum or electrolytic capacitors, ESR must be 20–100mΩ to provide sufficient zero for loop compensation - values outside this range require additional compensation components (C6) per Table 4 in the datasheet.
Does the FREQ pin require a pull-down resistor for default operation?
No - the FREQ pin is internally biased and operates correctly with only the external programming resistor to ground. Leaving FREQ unconnected results in undefined frequency behavior; a resistor is mandatory for any defined switching frequency, including the default 4MHz setting (18kΩ to GND).
How does frequency foldback improve light-load efficiency?
At light loads, the MP4460DQ-LF-P automatically reduces switching frequency to lower gate-driving and switching losses - e.g., dropping from 4MHz to ~500kHz at 10mA load. This maintains >85% efficiency across four decades of load current, unlike fixed-frequency converters whose efficiency collapses below 10% load.
MP4460DQ-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:
- 2.5A
- 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)
MP4460DQ-LF-P FAQ
1.How can I place an order for MP4460DQ-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4460DQ-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 MP4460DQ-LF-P reliable?
The price and inventory of MP4460DQ-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 MP4460DQ-LF-P is usually 5 days.
3.What payment methods are accepted for MP4460DQ-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4460DQ-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4460DQ-LF-P?
MP4460DQ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4460DQ-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 MP4460DQ-LF-P?
For technical support, including MP4460DQ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4460DQ-LF-P requirements.
6.How does Aetrix verify that MP4460DQ-LF-P is sourced from the original manufacturer or authorized distributors?
All MP4460DQ-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 MP4460DQ-LF-P meets industry standards.
7.What is the process for return or replacement of MP4460DQ-LF-P?
All MP4460DQ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4460DQ-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 MP4460DQ-LF-P part is unused and in its original packaging.
Return procedure for MP4460DQ-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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