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

Monolithic Power Systems Inc. MP1583DN-LF-P

Name: MP1583DN-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MP1583DN-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP1583DN-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:: MP1583DN-LF-P.pdf

Description:: IC REG BUCK ADJ 3A 8SOIC

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Product details

Overview

MP1583DN-LF-P from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 100mΩ high-side N-channel MOSFET, delivering up to 3A continuous output current across 4.75V–23V input range, fixed 385kHz switching frequency, and adjustable 1.22V–21V output voltage-used in battery chargers and distributed power systems.

For engineers reviewing the MP1583DN-LF-P datasheet, MP1583DN-LF-P pinout, MP1583DN-LF-P application, or MP1583DN-LF-P equivalent, this device supports fast transient response via current-mode control, includes cycle-by-cycle overcurrent protection and thermal shutdown, and enables compact designs using low-ESR ceramic output capacitors.

Technical Context

The MP1583DN-LF-P implements current-mode control architecture with internal transconductance error amplifier (G_EA = 500–1120 µA/V) and current-sense transconductance (G_CS = 3.8 A/V), enabling stable regulation and rapid load-step response. Its oscillator operates at a fixed 385kHz (±13%) with frequency foldback during short-circuit conditions (25–55kHz).

It integrates a bootstrap gate driver for the high-side switch, requiring an external 4.7nF+ capacitor between SW and BS pins. The EN pin provides enable/UVLO functionality with 2.54V threshold (±170mV hysteresis), while SS pin controls soft-start timing via external capacitor (e.g., 0.1µF yields 10ms).

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.75V to 23V - supports wide-input industrial and automotive supply rails without pre-regulation
Output Current	3A continuous - sufficient for powering FPGA I/O banks, microcontroller cores, or multi-rail PMIC inputs
Switching Frequency	385kHz (typ.) - balances EMI performance and inductor size; allows use of standard 15µH shielded power inductors
Feedback Reference	1.222V ±2.5% - sets output accuracy; enables precise 3.3V or 5V regulation with 1% resistor tolerance
High-Side R_DS(on)	100mΩ - reduces conduction loss at full load; contributes to ≥95% peak efficiency at 12V→5V/2A
Shutdown Current	20µA - enables ultra-low-power standby in battery-backed systems
Thermal Shutdown	160°C - protects die under sustained overload or poor PCB thermal design

Pinout & Package

MP1583DN-LF-P uses SOIC-8E (exposed pad) package with 150°C max junction temperature rating and θ_JA = 50°C/W on 4-layer PCB. Exposed pad must be soldered to Pin 4 (GND) for thermal and electrical integrity.

Pin/Terminal	Circuit Role	Design Meaning
1 BS	Bootstrap Supply Input	Drives high-side MOSFET gate above VIN; requires ≥4.7nF capacitor to SW for proper bootstrapping
2 IN	Main Power Input	Accepts 4.75–23V; must be bypassed with low-ESR ceramic capacitor near pin for noise suppression
3 SW	Switch Node Output	Connects to inductor and bootstrap capacitor; carries high di/dt; requires tight layout to minimize EMI
4 GND	Power Ground	Reference for all internal circuits; exposed pad must be connected here for thermal dissipation
5 FB	Voltage Feedback Input	Senses output via resistive divider; 1.222V reference enables accurate output setting from 1.22V to 21V
6 COMP	Loop Compensation Node	Connects RC network to stabilize control loop; determines phase margin and transient response
7 EN	Enable / UVLO Input	Active-high enable with 2.54V threshold and 210mV hysteresis; internal 7V zener protects against overvoltage
8 SS	Soft-Start Control	Charges external capacitor to ramp output voltage; prevents input surge current at startup

Key Features

Feature	Design Value
Integrated 100mΩ High-Side MOSFET	Eliminates need for external high-side switch and driver, reducing BOM count and board area
Stable with Ceramic Output Capacitors	Enables use of small, reliable, low-ESR MLCCs instead of bulkier tantalum or electrolytic types
Programmable Soft-Start	Prevents inrush current and output overshoot by controlling startup dV/dt via external capacitor
Cycle-by-Cycle Overcurrent Protection	Detects and limits peak switch current every cycle, preventing MOSFET failure during short-circuit events
Thermal Shutdown with Hysteresis	Shuts down at 160°C and restarts only after die cools below ~140°C, avoiding thermal oscillation

Applications

Battery Charger Pre-Regulator

Distributed Power System

Use Scenario: Regulates variable wall-adapter or USB-PD input (9–20V) to stable 5V/3A for Li-ion charging ICs.

IC Role / Device Role / Timing Role: Primary buck regulator providing clean, efficient intermediate bus voltage before linear or switching charge management stage.

Use Value: Enables single-stage conversion from wide-input sources while maintaining >92% efficiency at 12V→5V/3A, reducing heat and footprint vs. discrete solutions.

Use Scenario: Powers multiple downstream point-of-load converters in telecom or industrial backplanes with 12V or 24V input rails.

IC Role / Device Role / Timing Role: Intermediate bus converter supplying regulated 3.3V or 5V to multiple POL modules, decoupling upstream supply variations.

Use Value: Delivers 3A at ±1% output accuracy with fast line/load transient response (<50µs recovery), improving system-level stability.

Microcontroller Power Supply

FPGA Core Voltage Rail

Use Scenario: Supplies 3.3V/2A to ARM Cortex-M7 or RISC-V SoC with dynamic load ranging from 10mA to 2A.

IC Role / Device Role / Timing Role: Main system power rail regulator with programmable soft-start and tight load regulation for deterministic boot behavior.

Use Value: Maintains <1% output deviation across 0–2A load steps due to current-mode control and 1.222V precision reference.

Use Scenario: Generates 1.2V/3A core voltage for Xilinx Artix-7 or Intel Cyclone V FPGA under varying logic utilization.

IC Role / Device Role / Timing Role: High-current, low-noise buck regulator with ceramic-capacitor compatibility for minimal output ripple.

Use Value: Achieves <15mVpp output ripple at full load using 22µF ceramic output cap, meeting FPGA core rail noise requirements.

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	Higher 6A rating, 500kHz switching, smaller 8-pin QFN package, no exposed pad requirement	Better suited for space-constrained designs needing >3A; lacks soft-start pin (internal only)	Select when higher current headroom or smaller footprint is critical; verify thermal performance without exposed pad
LM2678SX-5.0/NOPB	Fixed 5V output, 5A capability, 260kHz operation, external MOSFET required, larger TO-263 package	Designed for fixed-output, high-reliability industrial use; requires external high-side FET and driver	Choose for legacy 5V-only systems where external FET control or MIL-STD-883 compliance is required

Compared with MP1583DN-LF-P, MP2315DJ-LF-Z offers higher current and frequency in a smaller package but sacrifices soft-start configurability, while LM2678SX-5.0/NOPB delivers fixed 5V at 5A with proven ruggedness but demands more external components and board area.

Availability

MP1583DN-LF-P is available at Aetrix Electronics and suitable for battery chargers, distributed power systems, microcontroller power supplies, and FPGA core rails requiring stable component supply across industrial temperature ranges.

Supply support for MP1583DN-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 California and serving global industrial, computing, and automotive markets since 1997.

The MP1583 belongs to MPS's mainstream DC/DC buck converter product line, designed for cost-sensitive, high-efficiency power conversion in consumer, industrial, and communications equipment with minimal external components.

FAQ

What is the maximum recommended output current for MP1583DN-LF-P at 85°C ambient?

The MP1583DN-LF-P delivers 3A continuous output current rated over –40°C to +85°C ambient. At 85°C with SOIC8E on a 4-layer PCB (θ_JA = 50°C/W), thermal derating begins above ~2.2A due to junction temperature approaching 125°C limit-confirmed by efficiency curves and thermal resistance data in Rev. 3.1 datasheet.

Can MP1583DN-LF-P operate with 24V input?

No-absolute maximum input voltage is +28V, but recommended operating range is strictly 4.75V to 23V per datasheet Section "Recommended Operating Conditions." Applying 24V exceeds specification and risks long-term reliability degradation or immediate failure under transient overvoltage conditions.

Is an external bootstrap diode required for MP1583DN-LF-P?

An external bootstrap diode (e.g., IN4148) is optional and recommended only when V_OUT = 3.3V or 5V and duty cycle exceeds 65% (i.e., V_IN > 1.5×V_OUT). It improves high-duty-cycle efficiency by reducing bootstrap capacitor discharge; not needed for typical 12V→5V or 12V→3.3V operation.

What is the minimum output voltage achievable with MP1583DN-LF-P?

The minimum regulated output voltage is 1.22V, set by the internal 1.222V feedback reference voltage. With standard 1% resistors, outputs down to 1.22V can be achieved reliably; lower voltages require external reference or different IC, as the FB pin cannot be driven below its reference threshold.

Does MP1583DN-LF-P support forced PWM or discontinuous conduction mode (DCM)?

No-MP1583DN-LF-P operates exclusively in current-mode continuous conduction mode (CCM) with fixed-frequency 385kHz operation. It does not include pulse-skipping, burst-mode, or DCM control; light-load efficiency is maintained via low 20µA shutdown current but no active low-power modulation.

How is thermal performance affected by the exposed pad connection in SOIC8E?

The exposed pad in MP1583DN-LF-P's SOIC8E package must be soldered to Pin 4 (GND) and a dedicated thermal pad on PCB. Omitting this connection increases θ_JA from 50°C/W to >80°C/W, causing >30°C higher junction temperature at 3A-potentially triggering thermal shutdown or reducing lifetime.

MP1583DN-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):: 23V

Voltage - Output (Min/Fixed):: 1.22V

Voltage - Output (Max):: 21V

Current - Output:: 3A

Frequency - Switching:: 385kHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC-EP

MP1583DN-LF-P FAQ

1.How can I place an order for MP1583DN-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP1583DN-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 MP1583DN-LF-P reliable?

The price and inventory of MP1583DN-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 MP1583DN-LF-P is usually 5 days.

3.What payment methods are accepted for MP1583DN-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1583DN-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP1583DN-LF-P?

MP1583DN-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP1583DN-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 MP1583DN-LF-P?

For technical support, including MP1583DN-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1583DN-LF-P requirements.

6.How does Aetrix verify that MP1583DN-LF-P is sourced from the original manufacturer or authorized distributors?

All MP1583DN-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 MP1583DN-LF-P meets industry standards.

7.What is the process for return or replacement of MP1583DN-LF-P?

All MP1583DN-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP1583DN-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 MP1583DN-LF-P part is unused and in its original packaging.

Return procedure for MP1583DN-LF-P:

1.Submit a request within 90 days.

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

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