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Monolithic Power Systems Inc. MP1583DP-LF
- Part No.:
- MP1583DP-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MP1583DP-LF.pdf
- Description:
- IC REG BUCK ADJ 3A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,521
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Product details
Overview
MP1583DP-LF from Monolithic Power Systems is a current-mode synchronous step-down DC/DC converter 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 output from 1.22V to 21V; used in battery chargers and pre-regulators where compact size and thermal robustness are critical.
For engineers reviewing the MP1583DP-LF datasheet, MP1583DP-LF pinout, MP1583DP-LF application, or MP1583DP-LF equivalent, this page delivers verified electrical parameters, validated PDIP8 package layout, real-world soft-start timing, thermal shutdown behavior, and direct substitution guidance for industrial power design.
Technical Context
The MP1583DP-LF employs peak current-mode control with internal transconductance error amplifier (GEA = 500–1120 µA/V) and current-sense transconductance (GCS = 3.8 A/V), enabling fast transient response and stable loop compensation via external RC network on COMP pin. Its oscillator operates at 385kHz ±13% with foldback during short-circuit (25–55kHz).
It integrates cycle-by-cycle overcurrent protection triggering at 4.0–6.0A, thermal shutdown at 160°C, and EN pin UVLO with 2.54V rising threshold and 210mV hysteresis; soft-start period is programmable via external capacitor (e.g., 10ms with 0.1µF on SS pin).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports high-current loads without external MOSFETs or heatsinking in PDIP8 footprint. |
| Input Voltage Range | 4.75V to 23V - accommodates wide-input industrial rails and unregulated battery inputs (e.g., 12V nominal, 18V max). |
| Switching Frequency | 385kHz typical - balances EMI performance and inductor size; enables use of 15µH shielded ferrite inductors. |
| Feedback Reference | 1.222V ±2.9% - sets output accuracy; allows precise 3.3V (±1.5%) or 5V (±1.2%) regulation with standard resistor tolerances. |
| Shutdown Current | 20µA - minimizes standby drain in battery-powered systems; enabled by logic-level EN pin with 0.9–1.5V shutdown threshold. |
| Internal MOSFET RDS(ON) | 100mΩ - reduces conduction loss at full load; contributes to ≥95% peak efficiency at 5V/2A with ceramic output caps. |
| Thermal Shutdown | 160°C - protects die under overload or poor PCB copper; resumes operation after cooldown with hysteresis. |
Pinout & Package
MP1583DP-LF uses PDIP8 package (0.300" width, 0.100" lead pitch), rated for –40°C to +85°C ambient, with 1.2W max power dissipation at +25°C and θJA = 104°C/W. Exposed pad not present - all thermal path relies on leadframe and PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BS | Bootstrap Supply Input | Drives high-side gate; requires ≥4.7nF capacitor from SW to BS to sustain gate voltage above VIN during high-duty cycles. |
| 2 IN | Main Power Input | Accepts 4.75–23V; must be bypassed with ≥10µF low-ESR ceramic capacitor close to pin to suppress switching noise. |
| 3 SW | Switch Node Output | Connects to inductor and bootstrap cap; carries high di/dt; routing must minimize loop area to reduce EMI. |
| 4 GND | Power Ground Reference | Common return for IN, SW, FB, COMP, SS, EN; must tie to low-impedance ground plane to stabilize feedback and soft-start. |
| 5 FB | Voltage Feedback Input | Senses output via resistive divider; 1.222V reference enables accurate output setting; sensitive to noise-keep trace short. |
| 6 COMP | Error Amplifier Output | Compensation node for loop stability; connects RC network (e.g., 4.7kΩ + 4.7nF) to GND to set pole-zero for 38kHz crossover. |
| 7 EN | Enable / UVLO Input | Logic-compatible enable: <0.9V = shutdown (20µA IQ), >2.71V = active; internal 7V zener limits overvoltage stress. |
| 8 SS | Soft-Start Control | Charges external capacitor to ramp output voltage linearly; 0.1µF yields ~10ms startup; open = automatic start. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100mΩ High-Side MOSFET | Eliminates need for external switch and driver, reducing BOM count and PCB area in space-constrained designs. |
| Stable with Low-ESR Ceramic Capacitors | Enables use of compact, long-life 22µF X5R/X7R ceramics on output-no electrolytic required for 3A loads. |
| Programmable Soft-Start | Prevents input surge current and output overshoot during power-up; configurable from 1ms to >100ms via SS capacitor. |
| Cycle-by-Cycle Overcurrent Protection | Detects per-switch-cycle current limit (4.0–6.0A); prevents MOSFET failure during short-circuit or overload events. |
| Fixed 385kHz Switching Frequency | Provides predictable EMI profile and simplifies filter design; avoids audible noise while supporting small magnetics. |
Applications
| Battery Charger Pre-Regulator | Distributed 5V Rail Generator |
|---|---|
|
Use Scenario: Converts 12V automotive or Li-ion pack voltage to regulated 5V for USB charging circuits in portable medical devices. IC Role / Device Role / Timing Role: Primary buck regulator providing stable 5V/3A output with tight line/load regulation and thermal fault recovery. Use Value: Replaces discrete buck controllers + MOSFETs, cutting solution size by 40% and eliminating gate-drive design complexity. |
Use Scenario: Powers FPGA I/O banks and peripheral ICs in industrial PLC modules using unregulated 12–24V backplane supply. IC Role / Device Role / Timing Role: Point-of-load (POL) converter delivering low-noise 3.3V/3A with <1% output deviation across temperature and load. Use Value: Achieves >92% efficiency at full load with ceramic-only output filtering-reducing heat rise and eliminating electrolytic aging concerns. |
| LED Driver Front-End | Industrial Sensor Signal Chain Supply |
|
Use Scenario: Supplies constant 12V bus for high-brightness LED strings in smart lighting fixtures operating from 24V DC distribution. IC Role / Device Role / Timing Role: Pre-regulator stepping down 24V to 12V before constant-current LED driver IC, improving overall system efficiency. Use Value: Fixed 385kHz operation avoids interference with PWM dimming frequencies; thermal shutdown ensures safe operation during LED thermal runaway. |
Use Scenario: Powers precision analog front-end (AFE) and ADC in condition-monitoring vibration sensors powered from 15V fieldbus. IC Role / Device Role / Timing Role: Clean, low-ripple 3.3V supply with <10mV p-p noise; COMP compensation optimized for fast load transients from sensor sampling bursts. Use Value: Stable 1.222V reference and low-noise COMP node enable <12-bit effective resolution in 24-bit sigma-delta ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1584EN-LF | Higher 4A output current, 1.5MHz switching frequency, SOIC8E package only; no PDIP8 option. | Requires smaller inductors/caps but increases EMI filtering burden; unsuitable for legacy through-hole assembly. | Select when board space is constrained and surface-mount assembly is available; avoid if PDIP8 mechanical fit or thermal mass is required. |
| LM2678-5.0/NOPB | Fixed 5V output, 5A capability, 260kHz frequency, TO-220-5 package; no adjustable feedback or soft-start. | Lacks output adjustability and programmable startup; better suited for simple fixed-output systems without sequencing needs. | Choose only for cost-sensitive 5V-only applications where flexibility and compactness are secondary to unit price. |
Compared with MP1583DP-LF, MP1584EN-LF offers higher current and frequency but sacrifices through-hole compatibility and design flexibility, while LM2678-5.0/NOPB trades adjustability and soft-start for lower BOM cost in fixed-voltage deployments.
Availability
MP1583DP-LF is available at Aetrix Electronics and suitable for battery chargers, distributed power systems, and industrial sensor supplies requiring stable component supply, RoHS-compliant through-hole packaging, and long-term lifecycle support.
Supply support for MP1583DP-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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP1583 belongs to MPS's mainstream buck converter product line, designed for cost-effective, high-efficiency point-of-load regulation in industrial, computing, and consumer power systems where reliability and minimal external components are essential.
FAQ
What is the maximum recommended output voltage for MP1583DP-LF?
The MP1583DP-LF supports output voltages from 1.22V to 21V, set by an external resistive divider on the FB pin. The upper limit is constrained by the 23V absolute maximum input rating and internal error amplifier headroom; outputs above 18V require careful attention to feedback divider power rating and noise immunity.
Can MP1583DP-LF operate with a 24V input?
No-24V exceeds the 23V maximum input rating and risks permanent damage. The absolute maximum VIN is +23V, and operation above this violates Absolute Maximum Ratings. For 24V systems, use input clamping or pre-regulation to ensure VIN ≤23V under all conditions including transients.
Is an external bootstrap diode required for MP1583DP-LF?
An external bootstrap diode (e.g., IN4148) is optional and recommended only when VOUT = 3.3V or 5V and duty cycle exceeds 65% (i.e., VIN > 7.7V for 3.3V out). It improves high-side gate drive margin and efficiency but is not mandatory for basic operation.
What is the minimum output capacitor value for stable operation?
MPS specifies stability with ≥22µF ceramic output capacitance (e.g., Murata GRM21BR61A226ME15L). Lower values may cause instability or excessive ripple; for aluminum electrolytics, ≥470µF with ≤30mΩ ESR is required to maintain phase margin due to ESR zero placement.
Does MP1583DP-LF support synchronous rectification?
No-the MP1583DP-LF uses an internal high-side N-MOSFET and an external Schottky diode (e.g., B330A) for low-side conduction. It does not integrate a synchronous rectifier; the low-side path is diode-based, confirmed by block diagram and application schematics showing D1 connected from SW to GND.
How does thermal shutdown behave during sustained overload?
When junction temperature reaches 160°C, thermal shutdown disables switching and holds EN inactive until die cools by ~20°C hysteresis. Recovery is automatic-no latch or manual reset required-and output resumes regulation once safe temperature is restored.
What is the purpose of the exposed pad in SOIC8E variants, and does MP1583DP-LF have one?
The exposed pad in SOIC8E packages (e.g., MP1583DN) must be soldered to PCB ground for thermal relief and EMI reduction. MP1583DP-LF uses PDIP8, which has no exposed pad-thermal performance relies solely on leadframe conduction and PCB copper area connected to pins 2 (IN), 3 (SW), and 4 (GND).
MP1583DP-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MP1583DP-LF FAQ
1.How can I place an order for MP1583DP-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1583DP-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 MP1583DP-LF reliable?
The price and inventory of MP1583DP-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1583DP-LF is usually 5 days.
3.What payment methods are accepted for MP1583DP-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1583DP-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1583DP-LF?
MP1583DP-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1583DP-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 MP1583DP-LF?
For technical support, including MP1583DP-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1583DP-LF requirements.
6.How does Aetrix verify that MP1583DP-LF is sourced from the original manufacturer or authorized distributors?
All MP1583DP-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 MP1583DP-LF meets industry standards.
7.What is the process for return or replacement of MP1583DP-LF?
All MP1583DP-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP1583DP-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 MP1583DP-LF part is unused and in its original packaging.
Return procedure for MP1583DP-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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