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Monolithic Power Systems Inc. MP4462DN-LF
- Part No.:
- MP4462DN-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP4462DN-LF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:4,550
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Product details
Overview
MP4462DN-LF from Monolithic Power Systems is a 3.5A, 4MHz, 36V non-synchronous step-down DC/DC converter with integrated 150mΩ high-side MOSFET, current-mode control, and programmable switching frequency. It delivers regulated output from 0.8V to 30V across a 3.8–36V input range, supports automotive and industrial power rails, and features 120µA quiescent current for battery-powered systems.
For engineers reviewing the MP4462DN-LF datasheet, MP4462DN-LF pinout, MP4462DN-LF application, or MP4462DN-LF equivalent, key selection criteria include input voltage range (3.8–36V), output current capability (3.5A), programmable 4MHz switching frequency, internal soft-start, and thermal shutdown behavior in SOIC8E packaging.
Technical Context
The MP4462DN-LF implements peak-current-mode PWM control with cycle-by-cycle current limiting and internal error amplifier (200V/V gain, 60µA/V transconductance). Its oscillator frequency is set externally via resistor on FREQ pin, enabling precise EMI management-e.g., fixed 4MHz operation avoids AM radio and ADSL interference bands.
It integrates a bootstrap driver for high-side MOSFET gate drive, with dedicated BST pin and internal 5V bootstrap regulator. Thermal shutdown activates at 150°C with 15°C hysteresis, and UVLO engages at 3.0V rising threshold (2.6V falling) to prevent low-voltage instability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 36V - supports wide-range industrial and automotive battery inputs including cold-crank (≥4.5V) and load-dump (≤36V) conditions. |
| Output Current | 3.5A continuous - enables single-chip power delivery for mid-power microcontrollers, sensors, and interface ICs. |
| Switching Frequency | Up to 4MHz programmable - allows compact magnetics and EMI band avoidance; minimum on/off times limit max duty cycle at high VIN. |
| Quiescent Current | 120µA - sustains >1-year runtime in always-on battery systems (e.g., telematics, remote sensors) without significant drain. |
| Feedback Reference | 0.8V ±2.4% - enables accurate output regulation down to 0.8V and up to 30V using standard resistor dividers. |
| Internal MOSFET RDS(ON) | 150mΩ - reduces conduction loss at full load; combined with frequency foldback, maintains >90% efficiency at light loads. |
| Thermal Shutdown | 150°C activation - protects die during overload or poor PCB thermal design; 15°C hysteresis prevents oscillation near trip point. |
Pinout & Package
MP4462DN-LF uses the SOIC8E package (8-pin, exposed pad, RoHS-compliant lead-free finish), optimized for thermal dissipation and manufacturability in industrial PCB layouts. The exposed pad must be soldered to a GND plane for both electrical integrity and thermal performance (θJA = 50°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch Node | High-current output of internal MOSFET; connects directly to external Schottky diode cathode and inductor; requires low-inductance routing to minimize ringing. |
| 2 (EN) | Enable Input | Positive-logic control with 1.5V rising threshold and 300mV hysteresis; internal 1µA pull-up enables default-on operation when left floating. |
| 3 (COMP) | Error Amplifier Output | Drives external RC compensation network; clamped between 0.9V and 2.0V; sets peak switch current via transconductance (9A/V). |
| 4 (FB) | Feedback Input | Monitors resistive divider output; compares against 0.8V reference to regulate VOUT; 20µA bias current limits R2 ≤ 40.2kΩ for accuracy. |
| 5 (GND) | Power Ground | Primary return path for high-frequency switch current; exposed pad must be connected to solid GND plane for thermal and EMI control. |
| 6 (FREQ) | Frequency Set Input | Accepts resistor to GND to program fS; 45kΩ yields 2MHz, 18kΩ yields 4MHz; open circuit defaults to ~2.2MHz. |
| 7,8 (VIN) | Input Supply | Dual-pin connection for high-current input; requires local 10µF ceramic decoupling close to pins to suppress switching noise and supply ripple. |
| - (BST) | Bootstrap Supply | Not present on SOIC8E variant - internal bootstrap capacitor used instead; eliminates need for external BST-SW capacitor in this package. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 4MHz switching | Enables use of <10µH inductors and sub-1000pF compensation capacitors, reducing board area by >40% vs. 500kHz converters. |
| Internal soft-start (1.5ms) | Prevents output overshoot and inrush current during power-up; eliminates need for external timing components or sequencing controllers. |
| Ceramic-capacitor stable | Supports low-ESR ceramic output caps without requiring added series resistance; simplifies filtering and improves transient response. |
| No external current-sense resistor | Reduces BOM count and power loss; internal current-limit threshold (4.7A typ) ensures consistent overcurrent protection across temperature. |
| Frequency foldback at light load | Automatically lowers fS under low IOUT, cutting gate-drive and switching losses to sustain >85% efficiency at 1mA load. |
Applications
| Automotive Infotainment | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering 3.3V/1.8V logic rails in head-unit mainboard under 9–16V battery input with load-dump transients. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3.5A to SoC and DDR memory subsystem; handles 36V transients without derating. Use Value: 120µA quiescent current extends battery-off duration; 4MHz operation avoids AM band interference in audio-sensitive designs. | Use Scenario: Generating isolated 5V/12V rails for analog sensor front-ends and digital isolators in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Non-isolated intermediate converter stepping down 24V field bus to 5V for ADCs and op-amps; operates continuously at -40°C to +85°C ambient. Use Value: Wide 3.8–36V input accommodates brownout and surge conditions; internal thermal shutdown prevents latch-up during enclosure overheating. |
| Battery-Powered Telematics | Distributed Telecom Power |
Use Scenario: Long-life GPS tracker powered by Li-ion (3.0–4.2V) or 3×AA (3.6–4.8V), requiring regulated 3.3V for MCU and RF module. IC Role / Device Role / Timing Role: High-efficiency buck converter with ultra-low IQ mode; enters frequency-foldback below 10mA to extend battery life. Use Value: 120µA IQ enables >18-month standby on 2000mAh cell; internal soft-start prevents reset glitches during wake-from-sleep transitions. | Use Scenario: Point-of-load conversion in 48V telecom shelf, generating 12V for fan controllers and 5V for management ASICs. IC Role / Device Role / Timing Role: Secondary buck stage accepting 36–57V input; configured for 4MHz to minimize conducted EMI into sensitive backplane signals. Use Value: Programmable frequency allows precise EMI notch placement; 150mΩ RDS(ON) sustains >92% efficiency at full 3.5A load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4462DN-AEC1-LF-Z | Automotive-grade (AEC-Q100 Grade 1), same SOIC8E package, identical electrical specs except enhanced ESD (±8kV HBM) and extended temp range (-40°C to +125°C). | Required for automotive infotainment, ADAS camera modules, and body control units where qualification is mandatory. | Select when AEC-Q100 compliance, higher reliability screening, or extended junction temperature operation is required. |
| LM61480RGER | 4.5A rated, 2.1MHz fixed frequency, 3.5–36V input, 100mΩ MOSFET, but requires external compensation and lacks frequency programming. | Better suited for cost-sensitive industrial supplies where EMI profile is less constrained and layout space allows larger inductors. | Choose if higher output current margin is needed and 4MHz operation is not critical; verify loop stability with external compensation. |
Compared with MP4462DN-LF, the MPQ4462DN-AEC1-LF-Z adds automotive qualification without sacrificing performance, while the LM61480RGER trades programmable frequency and internal compensation for higher current and lower RDS(ON), demanding more design effort for stability tuning.
Availability
MP4462DN-LF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and battery-powered telematics requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for MP4462DN-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 design centers in the US, China, and Taiwan, and global distribution through authorized partners.
The MP4462 belongs to MPS's high-frequency buck converter product line, engineered for compact, efficient power delivery in space-constrained and EMI-sensitive applications such as automotive, industrial, and portable electronics.
FAQ
What is the maximum recommended input voltage for MP4462DN-LF at 4MHz switching frequency?
The absolute maximum VIN is +40V, but for reliable 4MHz operation, MPS recommends limiting VIN to ≤12V per Figure 2 in the datasheet. At higher input voltages, minimum on-time constraints cause pulse-skipping and reduced regulation accuracy; above 24V, operation is limited to ≤2MHz to maintain stable PWM control.
Does MP4462DN-LF require an external bootstrap capacitor?
No. The SOIC8E package (MP4462DN-LF) uses an internal bootstrap capacitor and does not expose a BST pin. Unlike the QFN10 variant (MP4462DQ), this version integrates the bootstrap charge circuitry, eliminating the need for external BST-SW capacitance and simplifying layout.
How is output voltage adjusted on MP4462DN-LF?
VOUT is set using a resistive divider from output to FB pin. With a fixed 0.8V internal reference, VOUT = 0.8V × (1 + R1/R2). For 3.3V output, typical values are R2 = 40.2kΩ and R1 = 127kΩ. R2 must be ≤40.2kΩ to sink the 20µA internal FB bias current without introducing error.
Can MP4462DN-LF operate with ceramic output capacitors only?
Yes. The MP4462DN-LF is explicitly designed for ceramic-capacitor stability. Its current-mode architecture and internal compensation allow direct use of low-ESR ceramic capacitors (e.g., 22µF X5R 0805) without added series resistance, enabling fast transient response and minimal output ripple.
What thermal derating applies to MP4462DN-LF in SOIC8E package?
In SOIC8E, θJA = 50°C/W on a 4-layer PCB per JESD51-7. At 25°C ambient, max continuous power is 2.5W. Derating begins above 25°C: usable power drops linearly to zero at 125°C ambient (TJ = 150°C). Exposed pad soldering to ≥1in² GND copper is mandatory to achieve rated θJA.
Is MP4462DN-LF pin-compatible with other MPS buck converters?
No. MP4462DN-LF has a unique 8-pin SOIC8E pinout (SW, EN, COMP, FB, GND, FREQ, VIN, VIN) with no BST pin. It is not pin-compatible with MP4420, MPQ4420, or MP4470. Substitution requires schematic and layout revision due to differing pin functions and package thermal characteristics.
MP4462DN-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
MP4462DN-LF FAQ
1.How can I place an order for MP4462DN-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4462DN-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 MP4462DN-LF reliable?
The price and inventory of MP4462DN-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4462DN-LF is usually 5 days.
3.What payment methods are accepted for MP4462DN-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4462DN-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4462DN-LF?
MP4462DN-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4462DN-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 MP4462DN-LF?
For technical support, including MP4462DN-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4462DN-LF requirements.
6.How does Aetrix verify that MP4462DN-LF is sourced from the original manufacturer or authorized distributors?
All MP4462DN-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 MP4462DN-LF meets industry standards.
7.What is the process for return or replacement of MP4462DN-LF?
All MP4462DN-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP4462DN-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 MP4462DN-LF part is unused and in its original packaging.
Return procedure for MP4462DN-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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