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Monolithic Power Systems Inc. MP1583DN-LF
- Part No.:
- MP1583DN-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP1583DN-LF.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:2,861
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Product details
Overview
MP1583DN-LF 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 datasheet, MP1583DN-LF pinout, MP1583DN-LF application, or MP1583DN-LF equivalent, this page provides verified functional identity, validated SOIC8E package mapping, confirmed 8-pin terminal roles, thermal shutdown and cycle-by-cycle overcurrent protection behavior, and real-world soft-start timing with 0.1µF capacitor.
Technical Context
The MP1583DN-LF employs current-mode control architecture 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.
It integrates a bootstrap gate driver for high-side switch operation, requires external SW-to-BS capacitor ≥4.7nF, supports programmable soft-start via SS pin (10ms typical with 0.1µF), and features EN pin with 2.54V UVLO threshold and 210mV hysteresis for reliable enable/disable sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports high-current loads without external MOSFETs or heatsinking in compact designs. |
| Input Voltage Range | 4.75V to 23V - accommodates wide-input industrial and automotive battery-supplied systems. |
| Switching Frequency | 385kHz (±13%) - enables use of small 15µH inductors and ceramic output capacitors while avoiding AM radio band. |
| Feedback Reference | 1.222V ±2.3% - sets output voltage accuracy; allows precise regulation down to 1.22V using standard resistor dividers. |
| Shutdown Current | 20µA - minimizes standby power loss in battery-powered applications during sleep mode. |
| Thermal Shutdown | 160°C - protects die under overload or poor PCB thermal design; auto-recovery after cooldown. |
| Soft-Start Time | 10ms (with 0.1µF SS capacitor) - limits inrush current and prevents input rail collapse at startup. |
Pinout & Package
MP1583DN-LF uses SOIC8E (exposed pad) package with 1.27mm pitch, 5.0mm × 6.2mm body, and thermal pad connected to GND (Pin 4) for enhanced power dissipation (θJA = 50°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BS | Bootstrap supply input | Drives high-side MOSFET gate above VIN; requires ≥4.7nF capacitor from BS to SW. |
| 2 IN | Main power input | Accepts 4.75–23V; must be bypassed with low-ESR ceramic capacitor near pin. |
| 3 SW | Switching node output | Connects to inductor and BS capacitor; carries high di/dt; requires short, low-inductance routing. |
| 4 GND | Power ground | Reference for all internal circuits; exposed pad must be soldered to PCB GND plane. |
| 5 FB | Voltage feedback input | Senses output via resistive divider; regulates VOUT to 1.222V reference with ±2.3% tolerance. |
| 6 COMP | Error amplifier output | Connects external RC compensation network to stabilize control loop; critical for transient response. |
| 7 EN | Enable/UVLO input | Active-high logic; 2.54V threshold with 210mV hysteresis; 7V internal zener clamp. |
| 8 SS | Soft-start timing control | Charges external capacitor to ramp output voltage linearly; open = automatic startup. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100mΩ MOSFET | Eliminates need for external high-side switch, reducing BOM count and layout complexity. |
| Stable with ceramic capacitors | Supports low-ESR ceramic output caps (e.g., 22µF X5R) without oscillation or instability. |
| Cycle-by-cycle current limiting | Prevents MOSFET failure during short-circuit or overload by limiting peak switch current to 4.0–6.0A. |
| Adjustable soft-start | Programmable startup ramp time (e.g., 10ms with 0.1µF) reduces input surge and EMI. |
| Under-voltage lockout | EN pin UVLO ensures clean start-up only when input rail exceeds 2.37V, preventing brownout operation. |
Applications
| Battery Charger Interface | Distributed Power System Pre-Regulator |
|---|---|
Use Scenario: Charging Li-ion or lead-acid batteries from variable 9–20V sources such as automotive alternators or solar charge controllers. IC Role / Device Role / Timing Role: Primary buck regulator providing constant-current/constant-voltage charging profile with tight output regulation. Use Value: Delivers 3A at 4.2V or 14.4V with >90% efficiency at mid-load, minimizing thermal stress in enclosed enclosures. | Use Scenario: Generating intermediate 5V or 3.3V rails from 12V or 24V backplane in telecom or industrial PLC systems. IC Role / Device Role / Timing Role: High-efficiency pre-regulator feeding LDOs or point-of-load converters, reducing heat generation vs. linear solutions. Use Value: Enables compact 15µH + 22µF ceramic solution with <15mV output ripple and fast load-step recovery. |
| Industrial Sensor Node Power Supply | Automotive Infotainment Core Rail |
Use Scenario: Powering microcontrollers, ADCs, and wireless transceivers in remote environmental monitoring nodes powered by 12V batteries. IC Role / Device Role / Timing Role: Main system regulator with low-noise output and robust fault protection for unattended operation. Use Value: 20µA shutdown current extends battery life; thermal shutdown prevents field failures under ambient temperature extremes. | Use Scenario: Supplying 5V core rail to MCU and display controller in vehicle head units operating from 9–16V battery input. IC Role / Device Role / Timing Role: Input-tolerant buck converter handling cold-crank (4.75V) and load-dump (23V) transients per ISO 7637-2. Use Value: Wide 4.75–23V input range and cycle-by-cycle OCP ensure reliable operation during automotive electrical disturbances. |
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 2MHz switching frequency, 3.5A rating, smaller 8-pin QFN package, no exposed pad required. | Better suited for space-constrained designs needing faster transient response and lower output ripple. | Select when board area is limited and higher-frequency operation is acceptable; requires different compensation. |
| LM2678SD-5.0/NOPB | Fixed 5V output, 5A capability, 260kHz frequency, external MOSFET required, larger SOIC-8 footprint. | Targeted at legacy 5V-only systems where simplicity and high current outweigh efficiency goals. | Choose only if fixed 5V output suffices and thermal design accommodates higher θJA (65°C/W). |
Compared with MP1583DN-LF, MP2315DJ-LF-Z offers higher integration density and bandwidth but demands tighter layout control; LM2678SD-5.0/NOPB trades adjustable output and efficiency for fixed-voltage simplicity and higher current, at the cost of larger thermal footprint.
Availability
MP1583DN-LF is available at Aetrix Electronics and suitable for battery chargers, distributed power systems, industrial sensor nodes, and automotive infotainment core rails requiring stable component supply across extended temperature ranges.
Supply support for MP1583DN-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, headquartered in California and serving global industrial, automotive, and computing markets since 1997.
The MP1583 belongs to MPS's mainstream DC/DC converter product line, designed specifically for cost-sensitive, high-efficiency buck regulation in consumer, industrial, and automotive applications with wide input voltage tolerance.
FAQ
What is the maximum recommended output current for MP1583DN-LF at 85°C ambient?
The MP1583DN-LF delivers 3A continuous output current at TA = +85°C when mounted on a 4-layer PCB with full GND plane and exposed pad soldered. Derating begins above 85°C ambient due to thermal shutdown activation at 160°C junction temperature; actual achievable current depends on copper area and airflow.
Can MP1583DN-LF operate with only ceramic capacitors on input and output?
Yes - MP1583DN-LF is explicitly characterized for stability with low-ESR ceramic capacitors. Typical designs use 10µF ceramic at IN and 22µF ceramic at OUT. No tantalum or electrolytic capacitors are required, simplifying bill-of-materials and improving reliability.
Is an external bootstrap diode necessary for MP1583DN-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 > 5.2V for 3.3V output). It improves high-duty-cycle efficiency by reducing bootstrap capacitor discharge losses.
How does the EN pin behave during power-up with slow-rising input voltage?
The EN pin has 2.54V UVLO threshold with 210mV hysteresis. When VIN ramps slowly, EN remains inactive until its voltage reaches 2.54V; once enabled, it stays active until voltage drops below 2.33V. Internal 7V zener protects against overvoltage, allowing direct connection to VIN without level-shifting.
What compensation components are needed for a 3.3V/3A output using 22µF ceramic output capacitor?
Per MPS datasheet Table 3, use R3 = 4.7kΩ, C3 = 4.7nF, and omit C6. Place these components within 2mm of COMP and GND pins. This configuration targets ~38kHz crossover frequency and >60° phase margin for stable 3.3V regulation with fast load-step response.
Does MP1583DN-LF support synchronization to an external clock?
No - MP1583DN-LF uses an internal oscillator fixed at 385kHz and lacks a SYNC pin or frequency-adjust capability. For synchronized multi-rail systems, consider MPS's MP2315 or MPQ4312 families which support external clock synchronization.
What is the minimum output voltage achievable with MP1583DN-LF?
The minimum regulated output voltage is 1.22V, set by the internal 1.222V feedback reference. Using standard 1% resistors, 1.22V can be achieved with R2 = 10kΩ and R1 ≈ 0Ω (short), though practical minimum is ~1.25V to maintain regulation margin under line/load/temperature variation.
MP1583DN-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):
- 4.75V
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOICE
MP1583DN-LF FAQ
1.How can I place an order for MP1583DN-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1583DN-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 MP1583DN-LF reliable?
The price and inventory of MP1583DN-LF 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 is usually 5 days.
3.What payment methods are accepted for MP1583DN-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1583DN-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1583DN-LF?
MP1583DN-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1583DN-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 MP1583DN-LF?
For technical support, including MP1583DN-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1583DN-LF requirements.
6.How does Aetrix verify that MP1583DN-LF is sourced from the original manufacturer or authorized distributors?
All MP1583DN-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 MP1583DN-LF meets industry standards.
7.What is the process for return or replacement of MP1583DN-LF?
All MP1583DN-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP1583DN-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 MP1583DN-LF part is unused and in its original packaging.
Return procedure for MP1583DN-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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