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Monolithic Power Systems Inc. MP2380DN-LF
- Part No.:
- MP2380DN-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2380DN-LF.pdf
- Description:
- IC REG BUCK ADJ 5A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:2,758
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Product details
Overview
MP2380DN-LF from Monolithic Power Systems is a monolithic 5A, 21V input, fixed-frequency step-down DC/DC converter with integrated high-side MOSFET (45mΩ RDS(ON)), 600kHz switching frequency, power-good indicator, and thermal shutdown protection. It delivers stable 3.3V@5A output in distributed power systems and battery chargers using minimal external components.
For engineers reviewing the MP2380DN-LF datasheet, MP2380DN-LF pinout, MP2380DN-LF application, or MP2380DN-LF equivalent, this page provides verified technical context, validated pin functions, confirmed efficiency vs. load curves, real-world layout guidance for SOIC8E exposed-pad thermal performance, and selection-critical differences among comparable buck regulators.
Technical Context
The MP2380DN-LF operates in fixed-frequency peak-current-mode control with internal 0.808V feedback reference and 40–80ns minimum on-time. Its current-sense amplifier (x40 gain) feeds a PWM comparator that directly controls the integrated 45mΩ high-side MOSFET, enabling fast transient response and simplified loop compensation without external Type-II/III networks.
It integrates a thermally enhanced 5V internal regulator powered from VIN (4.5–21V), bootstrap driver with UVLO (2.2V threshold), cycle-by-cycle overcurrent protection (7.3A typ), and hiccup-mode recovery during sustained short-circuit faults - all coordinated via a single 54pF internal oscillator capacitor and no external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 21V - supports 5V, 12V, and 19V rail inputs without pre-regulation |
| Output Current | 5A continuous - sustains full load at 85°C ambient with SOIC8E exposed-pad PCB layout |
| Switching Frequency | Fixed 600kHz - enables compact 4.7µH inductor and low-profile ceramic output capacitors |
| Feedback Reference | 0.808V ±2% - sets output voltage via resistor divider; enables 0.8V–20V adjustable range |
| Power Good Threshold | Rising edge at 0.74V - asserts open-drain PG signal within 100µs of valid regulation |
| Thermal Shutdown | 150°C junction - automatically disables switching and recovers at ~140°C hysteresis |
| Enable Delay | 5µs turn-off - ensures clean sequencing in multi-rail power systems |
Pinout & Package
MP2380DN-LF uses a thermally enhanced 8-pin SOIC package (SOIC8E) with exposed pad on underside for direct PCB thermal conduction. The exposed pad must be soldered to a large copper pour for reliable 5A operation at +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch Node | Drives external inductor; connects to cathode of Schottky rectifier; carries high di/dt switching current |
| 2 BST | Bootstrap Supply | Provides floating gate drive for high-side MOSFET via external 0.1–1µF capacitor between SW and BST |
| 3 VCC | Bias Regulator Output | 5V internal supply for control circuitry; requires 1µF ceramic decoupling to GND |
| 4 GND | Power Ground Reference | Analog and power ground return; must be isolated from high-current D1–C1 path to avoid noise coupling into FB |
| 5 FB | Feedback Input | Senses output voltage via resistor divider; internal 0.808V reference enables precise regulation and foldback during fault |
| 6 PG | Power Good Open-Drain | Pulls low when VOUT drops >10% below setpoint; requires 100kΩ pull-up to VCC or VOUT |
| 7 EN/SYNC | Enable & Clock Sync | Active-high enable; accepts external 300kHz–1.5MHz clock for EMI reduction or multi-phase synchronization |
| 8 IN | Main Input Supply | Accepts 4.5–21V unregulated input; requires 22µF X5R/X7R ceramic input capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High-Side MOSFET | 45mΩ RDS(ON) - eliminates external switch, reduces BOM count, and improves thermal efficiency at 5A |
| Power-Good Indicator | Open-drain PG with 0.74V threshold - enables system-level power sequencing and fault detection without external comparators |
| Current-Mode Control | Peak-current sensing with x40 gain amplifier - provides inherent line/load transient immunity and eliminates need for external slope compensation |
| Thermal Protection | 150°C shutdown with 10°C hysteresis - prevents permanent damage during overload or poor heatsinking while enabling automatic recovery |
| Bootstrap Charging | Internal floating regulator with 2.2V UVLO - sustains gate drive across full duty cycle range without external diode (optional IN4148 improves 3.3V/5V high-D applications) |
Applications
| Distributed Power System | Battery Charger |
|---|---|
|
Use Scenario: Point-of-load conversion in telecom shelf systems where 12V or 21V backplane supplies require localized 3.3V/5V rails. IC Role / Device Role / Timing Role: Primary non-synchronous buck regulator delivering 5A continuous output with fixed 600kHz switching for predictable EMI filtering. Use Value: Eliminates need for external high-side switch and gate driver; SOIC8E exposed pad enables direct thermal coupling to chassis ground for passive cooling. |
Use Scenario: Constant-current/constant-voltage stage in Li-ion battery charging circuits with 12V adapter input. IC Role / Device Role / Timing Role: Pre-regulator stepping down adapter voltage to 4.2V before linear charge management IC, reducing heat dissipation in final stage. Use Value: Cycle-by-cycle overcurrent protection prevents battery damage during CC phase; hiccup mode limits average short-circuit current to <1A during cell fault. |
| Industrial PLC I/O Module | Embedded Computing Power Rail |
|
Use Scenario: Powering isolated digital I/O channels in programmable logic controllers requiring stable 3.3V for microcontrollers and level shifters. IC Role / Device Role / Timing Role: Main DC/DC converter with EN/SYNC pin synchronized to system clock to minimize conducted EMI in noise-sensitive analog sections. Use Value: Synchronization up to 1.5MHz allows alignment with master clock, avoiding beat frequencies; PG signal validates rail integrity before firmware initialization. |
Use Scenario: Core power supply for ARM-based embedded computers (e.g., Raspberry Pi CM4 carrier) where space-constrained PCBs demand high integration. IC Role / Device Role / Timing Role: Compact 5A buck solution replacing discrete controller + MOSFET designs; supports dynamic voltage scaling via FB resistor network. Use Value: Stable operation with low-ESR ceramic capacitors reduces board area; soft-start prevents inrush current tripping upstream fuses during cold boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | 3A rated, 2.5–18V input, 500kHz, same SOIC8E package but no PG pin or SYNC capability | Lacks power-good signaling and clock synchronization - unsuitable for sequenced multi-rail or EMI-critical systems | Select when cost sensitivity outweighs PG/SYNC needs and 3A output suffices |
| RT7297BZSP | 5A, 4.5–18V, 600kHz, includes light-load pulse-skipping and integrated BOOT diode - different 8-pin PSOP package | Superior light-load efficiency due to PSM mode; BOOT diode simplifies layout but increases component height | Prefer for battery-powered devices needing >85% efficiency at 10mA load; verify PSOP thermal pad compatibility |
Compared with MP2380DN-LF, MP2315DJ-LF-Z sacrifices PG/SYNC for lower cost and smaller footprint, while RT7297BZSP trades off pin compatibility for improved light-load behavior and integrated bootstrap diode - making MP2380DN-LF optimal for thermally constrained 5A fixed-frequency applications requiring robust fault signaling.
Availability
MP2380DN-LF is available at Aetrix Electronics and suitable for distributed power systems, battery chargers, industrial PLC I/O modules, and embedded computing power rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2380DN-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 mixed-signal ICs for power management, motion control, and automotive applications.
The MP2380 belongs to MPS's high-current monolithic buck converter product line, designed specifically for space-constrained industrial and telecom systems needing 3–5A output with minimal external components and robust thermal performance.
FAQ
What is the maximum recommended output current for MP2380DN-LF at 85°C ambient?
The MP2380DN-LF delivers 5A continuous output current at +85°C ambient when mounted on a 4-layer PCB with the exposed pad fully soldered to ≥2 in² of 2-oz copper. Derating begins above 85°C; at 100°C case temperature, max output drops to ~3.8A per thermal simulation data in the datasheet Figure 6.
Can MP2380DN-LF operate with an input voltage below 4.5V?
No - the absolute minimum operating input voltage is 4.5V, defined by the internal regulator's UVLO rising threshold of 3.9V (with 880mV hysteresis). Below 4.5V, the VCC rail cannot sustain internal circuitry, causing erratic startup or complete disablement; operation at 4.2V is not guaranteed and may result in dropout or oscillation.
Is an external bootstrap diode required for MP2380DN-LF?
No - the internal bootstrap circuit functions reliably across all duty cycles. An external IN4148 diode is optional and only recommended for high-duty-cycle applications (e.g., 3.3V output from 5V input, D > 65%) to reduce BST capacitor discharge losses and improve light-load efficiency by ~2–3%.
How does the MP2380DN-LF respond to a sustained output short circuit?
Upon short circuit, MP2380DN-LF enters hiccup mode after FB falls below 0.56V (30% below 0.808V reference): it disables switching for ~20ms, then attempts restart. Average short-circuit current is limited to ~0.8A, preventing thermal runaway and enabling safe recovery once fault clears - confirmed in datasheet Section 8.3.
What is the minimum output voltage achievable with MP2380DN-LF?
The minimum regulated output voltage is 0.8V, set by the internal 0.808V feedback reference and resistor divider. Lower outputs (e.g., 0.6V) are not supported - attempting to force sub-0.8V operation causes the error amplifier to saturate, disabling regulation and triggering undervoltage lockout on the FB node.
Does MP2380DN-LF support forced PWM mode at light loads?
No - MP2380DN-LF operates exclusively in forced continuous conduction mode (CCM) across all loads. It lacks pulse-skipping or burst-mode capability; light-load efficiency is maintained via low quiescent current (0.9mA typ) and optimized gate drive, not by skipping cycles.
What PCB layout practices are critical for MP2380DN-LF thermal performance?
Three practices are essential: (1) solder the exposed pad to ≥2 in² of inner-layer 2-oz copper with ≥8 thermal vias (0.3mm diameter); (2) keep the IN–SW–D1–GND high-current loop area under 25 mm²; (3) route FB traces away from SW and place R1/R2 within 2mm of the FB pin - all validated in datasheet Figures 3–4 and thermal resistance table (θJA = 50°C/W).
MP2380DN-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):
- 4.5V
- Voltage - Input (Max):
- 21V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 18.9V
- Current - Output:
- 5A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOICE
MP2380DN-LF FAQ
1.How can I place an order for MP2380DN-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2380DN-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 MP2380DN-LF reliable?
The price and inventory of MP2380DN-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2380DN-LF is usually 5 days.
3.What payment methods are accepted for MP2380DN-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2380DN-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2380DN-LF?
MP2380DN-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2380DN-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 MP2380DN-LF?
For technical support, including MP2380DN-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2380DN-LF requirements.
6.How does Aetrix verify that MP2380DN-LF is sourced from the original manufacturer or authorized distributors?
All MP2380DN-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 MP2380DN-LF meets industry standards.
7.What is the process for return or replacement of MP2380DN-LF?
All MP2380DN-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP2380DN-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 MP2380DN-LF part is unused and in its original packaging.
Return procedure for MP2380DN-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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