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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MP2363DN-LF-P

Name: MP2363DN-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MP2363DN-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP2363DN-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Datasheet:: MP2363DN-LF-P.pdf

Description:: IC REG BUCK ADJ 3A 8SOIC

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Product details

Overview

MP2363DN-LF-P from Monolithic Power Systems is a non-synchronous step-down DC/DC converter IC with integrated 100mΩ high-side N-channel MOSFET, delivering 3A continuous output current across 4.75V–27V input range and adjustable 0.92V–21V output voltage. It operates at fixed 365kHz switching frequency, features cycle-by-cycle overcurrent protection, thermal shutdown, and programmable soft-start-used in battery chargers and distributed power systems.

For engineers reviewing the MP2363DN-LF-P datasheet, MP2363DN-LF-P pinout, MP2363DN-LF-P application, or MP2363DN-LF-P equivalent, key selection criteria include input voltage range (4.75–27V), output adjustability (0.92–21V), 3A continuous load capability, SOIC8N package with exposed pad, and absence of synchronous rectification requiring external Schottky diode.

Technical Context

The MP2363DN-LF-P employs current-mode control architecture for fast transient response and simplified loop compensation. Its internal transconductance error amplifier (800µA/V) interfaces with the COMP pin to enable stable regulation using external RC networks, while the 365kHz oscillator sets fixed timing independent of load or input variation.

It integrates a bootstrap-capacitor-driven high-side gate driver (BS pin), enabling operation above VIN via a SW-to-BS capacitor. Protection logic includes under-voltage lockout (2.54V threshold with 210mV hysteresis), thermal shutdown at 160°C, and cycle-by-cycle current limiting with 4.5–5.7A trip range.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.75V to 27V - supports wide industrial and automotive supply rails without pre-regulation
Output Current	3A continuous - sustains full load at ambient up to +85°C in SOIC8N package
Switching Frequency	365kHz (±50kHz) - enables compact magnetics and predictable EMI profile
Feedback Voltage	0.92V ±20mV - sets output accuracy and enables precise resistor-divider design
High-Side R_DS(on)	100mΩ - limits conduction loss at 3A, contributing to up to 95% peak efficiency
Shutdown Current	20µA - minimizes system standby power in battery-powered applications
Soft-Start Control	Capacitor-programmable via SS pin - eliminates input inrush and ensures monotonic V_OUT ramp

Pinout & Package

MP2363DN-LF-P is housed in an 8-pin SOICN (SOIC-8 with exposed thermal pad), JEDEC MS-012 variant BA, with pin 4 connected to GND and the exposed pad electrically tied to pin 4 for thermal and electrical grounding.

Pin/Terminal	Circuit Role	Design Meaning
1 BS	Bootstrap Supply Input	Drives high-side MOSFET gate; requires ≥10nF capacitor from SW to BS for charge pump operation
2 IN	Main Power Input	Accepts 4.75–27V; must be bypassed with low-ESR capacitor near IC for noise suppression
3 SW	Switch Node Output	Connects to inductor and external Schottky diode; carries high di/dt switching current
4 GND	Power and Signal Ground	Primary ground reference; exposed pad must be soldered to PCB ground plane for thermal performance
5 FB	Feedback Input	Senses output voltage via resistive divider; regulates V_OUT to 0.92V reference
6 COMP	Compensation Node	Output of internal transconductance error amplifier; accepts RC network for loop stability
7 EN	Enable Control	Digital input: >2.71V enables regulator; <0.9V disables; open-circuit enables automatic startup
8 SS	Soft-Start Timing	Capacitor-to-GND sets startup time (t_SS ≈ 45 × C_SS ms); prevents input surge

Key Features

Feature	Design Value
Integrated 100mΩ High-Side MOSFET	Reduces external component count and board space; eliminates need for discrete high-side switch
Stable with Ceramic Output Capacitors	Supports low-ESR ceramic caps down to 10µF - simplifies filtering and improves reliability vs. electrolytics
Programmable Soft-Start	Capacitor-controlled ramp prevents input voltage sag and output overshoot during power-up
Cycle-by-Cycle Overcurrent Protection	Hardware-level current limiting resets each switching cycle - avoids latch-off during momentary overload
Thermal Shutdown with Hysteresis	Shuts down at 160°C junction temperature and restarts only after cooling - prevents thermal runaway

Applications

Battery Charger Pre-Regulator

Distributed Power System

Use Scenario: Regulates unregulated 12V–24V bus to 5V/3.3V for Li-ion charging ICs in portable medical devices.

IC Role / Device Role / Timing Role: Primary step-down regulator providing stable intermediate rail; operates at fixed 365kHz to avoid interference with USB or wireless comms bands.

Use Value: 3A output supports multi-cell charger ICs; 4.75–27V input accommodates varying battery states-of-charge without dropout.

Use Scenario: Powers FPGA I/O banks and auxiliary logic from a shared 12V backplane in telecom line cards.

IC Role / Device Role / Timing Role: Point-of-load (POL) converter delivering 1.8V/2.5V rails; uses current-mode control for fast load transient response to bursty FPGA activity.

Use Value: Programmable soft-start prevents simultaneous inrush across multiple MP2363DN-LF-P units on same bus; thermal shutdown protects against airflow failure.

Industrial Sensor Node Power

Automotive Aftermarket Display

Use Scenario: Supplies 3.3V to low-power microcontroller and analog sensor front-end in IP67-rated environmental monitors.

IC Role / Device Role / Timing Role: Main DC/DC regulator operating from wide-input 9–24V vehicle or solar source; fixed 365kHz allows predictable EMI filtering.

Use Value: 20µA shutdown current extends battery life in sleep mode; -40°C to +85°C rating ensures outdoor deployment reliability.

Use Scenario: Converts 12V vehicle battery to 5V for LCD backlight drivers and touch controller in rear-seat entertainment units.

IC Role / Device Role / Timing Role: Non-synchronous buck converter driving external B330A Schottky diode; avoids synchronous rectifier complexity in cost-sensitive designs.

Use Value: 27V absolute max input withstands load-dump transients; UVLO (2.54V) prevents erratic behavior during cranking.

Equivalent & Alternatives

The following parts are listed as comparable options for similar non-synchronous step-down converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2338DN-LF-Z	Higher 4A output, 500kHz switching, improved light-load efficiency, RoHS-compliant by default	Replaces MP2363DN-LF-P in new designs requiring higher current or better efficiency below 100mA	Select MP2338DN-LF-Z when upgrading for future-proofing; not pin-compatible due to different pinout and BST configuration
LM2678-5.0/NOPB	Fixed 5V output, 5A capability, 260kHz switching, external MOSFET required, no soft-start pin	Suitable for legacy 5V-only systems where output adjustability is unnecessary	Choose LM2678-5.0/NOPB only if fixed 5V output suffices and external FET layout is acceptable; lacks programmable soft-start and FB flexibility

Compared with MP2363DN-LF-P, MP2338DN-LF-Z offers higher performance but requires PCB redesign, while LM2678-5.0/NOPB trades adjustability and integration for fixed-output simplicity-neither is drop-in compatible, making MP2363DN-LF-P optimal for existing 0.92–21V adjustable designs needing SOIC8N footprint and soft-start control.

Availability

MP2363DN-LF-P is available at Aetrix Electronics and suitable for battery chargers, distributed power systems, industrial sensor nodes, and automotive aftermarket displays requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MP2363DN-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, headquartered in Kirkland, WA, with global design and support operations.

The MP2363 belongs to MPS's non-synchronous buck converter product line, designed for cost-sensitive, thermally constrained applications where 3A output, wide input range, and minimal external components are prioritized over synchronous efficiency.

FAQ

What is the maximum recommended output voltage for MP2363DN-LF-P?

The MP2363DN-LF-P supports output voltages up to 21V, set by the feedback resistor divider ratio and limited by the 28V absolute maximum input rating. Operation above 21V risks violating the FB pin voltage limit and reduces margin against internal voltage references.

Can MP2363DN-LF-P operate without an external Schottky diode?

No. As a non-synchronous buck converter, MP2363DN-LF-P requires an external Schottky diode (e.g., B330A or MBRS340) between SW and GND to conduct inductor current during high-side switch off-time. Omitting it causes catastrophic failure due to lack of freewheeling path.

Is the exposed thermal pad on MP2363DN-LF-P electrically connected?

Yes-the exposed pad on the SOIC8N package is internally connected to pin 4 (GND). It must be soldered to a PCB copper pour tied to system ground to ensure thermal dissipation and electrical integrity; floating the pad degrades thermal resistance by >30°C/W.

What happens if the SS pin is left floating?

Leaving the SS pin unconnected violates the datasheet recommendation and increases susceptibility to noise-induced startup glitches. While the device may power up, uncontrolled soft-start can cause output overshoot or input inrush exceeding 3A, risking damage to upstream capacitors or fuses.

Does MP2363DN-LF-P support forced PWM or skip-mode operation?

No. MP2363DN-LF-P operates exclusively in continuous conduction mode (CCM) with fixed-frequency current-mode control. It does not include pulse-skipping, burst-mode, or forced PWM features-light-load efficiency is maintained solely through reduced quiescent current (1.2mA typical).

How is thermal performance affected by PCB copper area under the exposed pad?

Thermal resistance θ_JA drops from 50°C/W (standard SOIC8N) to ~35°C/W when the exposed pad is soldered to ≥1 in² of 1 oz copper. Insufficient copper area raises junction temperature beyond 150°C at 3A load, triggering thermal shutdown and reducing reliability.

Why does the datasheet state "Not Recommended for New Designs"?

MPS issued this notice because MP2338 offers superior specs (4A, 500kHz, better light-load efficiency) and active design support. MP2363DN-LF-P remains fully qualified and available for legacy production, but new projects should evaluate MP2338DN-LF-Z for long-term supply assurance.

MP2363DN-LF-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: MP

Package/Case:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 4.75V

Voltage - Input (Max):: 27V

Voltage - Output (Min/Fixed):: 0.92V

Voltage - Output (Max):: 21V

Current - Output:: 3A

Frequency - Switching:: 365kHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC-EP

MP2363DN-LF-P FAQ

1.How can I place an order for MP2363DN-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP2363DN-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 MP2363DN-LF-P reliable?

The price and inventory of MP2363DN-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 MP2363DN-LF-P is usually 5 days.

3.What payment methods are accepted for MP2363DN-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2363DN-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP2363DN-LF-P?

MP2363DN-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP2363DN-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 MP2363DN-LF-P?

For technical support, including MP2363DN-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2363DN-LF-P requirements.

6.How does Aetrix verify that MP2363DN-LF-P is sourced from the original manufacturer or authorized distributors?

All MP2363DN-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 MP2363DN-LF-P meets industry standards.

7.What is the process for return or replacement of MP2363DN-LF-P?

All MP2363DN-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2363DN-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 MP2363DN-LF-P part is unused and in its original packaging.

Return procedure for MP2363DN-LF-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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