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Monolithic Power Systems Inc. MP2493DS-LF-P
- Part No.:
- MP2493DS-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP2493DS-LF-P.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,416
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Product details
Overview
MP2493DS-LF-P from Monolithic Power Systems is a monolithic 2A, 36V step-down DC/DC converter with programmable output current limit via ISP/ISN sensing, fixed 130kHz switching frequency, 0.25Ω internal MOSFET, and stable operation with low-ESR ceramic output capacitors. It delivers regulated 0.8V–15V outputs in automotive cigarette lighter adapters and USB power supplies.
For engineers reviewing the MP2493DS-LF-P datasheet, MP2493DS-LF-P pinout, MP2493DS-LF-P application, or MP2493DS-LF-P equivalent, key selection criteria include input voltage range (4.5–36V), programmable current limit threshold (100mV sense voltage), thermal shutdown behavior (150°C), and SOIC8 package compatibility with exposed-pad thermal enhancement.
Technical Context
The MP2493DS-LF-P implements current-mode control with integrated high-side MOSFET and bootstrap gate drive (BST–SW), enabling efficient buck conversion across wide input ranges. Its error amplifier regulates output voltage via FB pin while a dedicated current-sense comparator monitors ISP–ISN differential to enforce programmable load current limiting.
It features cycle-by-cycle overcurrent protection triggered at peak switch current ≥2.5A (typical), fixed-frequency PWM operation at 130kHz (±23kHz), and soft-start control via external SS capacitor. The device uses slope compensation to maintain stability under varying duty cycles and supports DCR-based or precision resistor-based current sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 36V - Supports 12V/24V automotive and industrial bus rails without pre-regulation. |
| Continuous Output Current | 2A - Sustained delivery with thermal shutdown at 150°C junction temperature. |
| Switching Frequency | 130kHz (fixed) - Enables predictable EMI filtering and avoids AM radio band interference. |
| Feedback Reference Voltage | 0.8V ±2% - Sets output voltage accuracy via external resistor divider on FB pin. |
| Current Sense Threshold | 100mV (ISP–ISN) - Defines programmable current limit; enables lossless DCR or precision Rsense implementation. |
| Internal MOSFET RDS(on) | 0.25Ω - Reduces conduction loss and simplifies thermal design in compact layouts. |
| Efficiency | Up to 95% - Achieved at 12VIN/5VOUT/1.5A with optimized external components. |
Pinout & Package
MP2493DS-LF-P is housed in an 8-pin SOIC package (SOIC8) with standard JEDEC MS-012 footprint and no exposed thermal pad. Pin 2 is GND; Pin 7 is BST; Pin 8 is SW; the exposed pad is absent - unlike the SOIC8E variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Unregulated input supply | Accepts 4.5–36V; powers internal circuitry and serves as drain node for internal MOSFET. |
| GND (Pin 2) | Power and signal reference ground | Primary return path for input capacitor, feedback network, and current sense circuitry. |
| FB (Pin 3) | Output voltage feedback input | Compares divided output voltage against 0.8V reference to regulate VOUT. |
| SS (Pin 4) | Soft-start and current-limit compensation | Controls startup slew rate and sets bandwidth of current regulation loop via external capacitor. |
| ISN (Pin 5) | Negative current sense input | Completes differential pair with ISP; senses voltage drop across sense resistor or inductor DCR. |
| ISP (Pin 6) | Positive current sense input | High-impedance input referenced to ISN; triggers current limit when VISP–VISN ≥100mV. |
| BST (Pin 7) | Bootstrap capacitor connection | Forms floating supply for high-side gate driver; requires 0.1μF ceramic capacitor between BST and SW. |
| SW (Pin 8) | Switch node output | Source of internal MOSFET; connects to inductor and catch diode; high dv/dt node requiring careful layout. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output current limit | Set via 100mV ISP–ISN threshold - enables precise, lossless current regulation using DCR or discrete sense resistor. |
| Low-EMI fixed-frequency operation | 130kHz switching - minimizes conducted emissions and simplifies filter design versus spread-spectrum alternatives. |
| Integrated 0.25Ω MOSFET | Eliminates external high-side switch - reduces BOM count and PCB area in space-constrained designs. |
| Stability with ceramic output caps | Compatible with low-ESR X5R/X7R ceramics - avoids need for electrolytic or tantalum capacitors and improves reliability. |
| Thermal shutdown + cycle-by-cycle OCP | 150°C junction cutoff plus per-cycle current limiting - protects against sustained overload and short-circuit faults. |
Applications
| Automotive Cigarette Lighter Adapter | USB-C Power Delivery Front-End |
|---|---|
|
Use Scenario: Converts 12V–24V vehicle battery to stable 5V/3A for charging smartphones and accessories via cigarette lighter socket. IC Role / Device Role / Timing Role: Primary buck regulator providing constant-voltage output with programmable current limit to prevent fuse blowout during cold cranking transients. Use Value: Maintains 5V regulation across 6V–36V input range and limits peak current to 2A during USB enumeration, avoiding overloading OEM wiring harnesses. |
Use Scenario: Supplies 5V/2A to USB-C PD controller ICs (e.g., TUSB320) and Type-C port power switches in portable docking stations. IC Role / Device Role / Timing Role: Pre-regulator stage delivering clean, low-noise 5V before PD negotiation begins; operates independently of CC logic timing. Use Value: Delivers 95% efficiency at full load with minimal thermal rise in enclosed enclosures, supporting fanless thermal design. |
| Linear Charger Power Supply | Industrial Sensor Node Power Rail |
|
Use Scenario: Powers linear Li-ion battery chargers (e.g., MCP73831) in portable medical devices where low noise and tight voltage tolerance are critical. IC Role / Device Role / Timing Role: Low-ripple, low-EMI DC/DC source feeding charger IC's VIN; avoids switching noise coupling into analog battery sensing paths. Use Value: Achieves <±1% output voltage deviation across line/load/temperature, ensuring accurate charge termination and cell safety. |
Use Scenario: Provides 3.3V/1.5A to wireless sensor nodes (e.g., CC2652R) operating in harsh environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary system power rail generator with built-in thermal protection - sustains operation up to +85°C ambient without derating. Use Value: Operates continuously at 1.5A with junction temperature ≤125°C under worst-case airflow, eliminating need for heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2493DN-LF-Z | SOIC8E package with exposed thermal pad; θJA = 50°C/W vs. 90°C/W for SOIC8. | Better thermal performance in high-power or sealed enclosures; requires PCB thermal pad connection to GND plane. | Select when continuous 2A output must be sustained above +60°C ambient or in convection-limited environments. |
| LM5164QDGSRQ1 | 40V input, 1A output, 1MHz switching, integrated FET but no ISP/ISN current limit interface. | Lacks programmable current limit - relies on external current-sense amplifier and comparator for foldback. | Choose only if higher frequency (1MHz) and AEC-Q100 qualification are required, and current limit can be implemented externally. |
Compared with MP2493DN-LF-Z, the MP2493DS-LF-P offers lower cost and simpler layout but reduced thermal headroom; versus LM5164QDGSRQ1, it provides native current-limit programming and lower quiescent current (800μA vs. 1.2mA), making it preferable for always-on industrial sensors.
Availability
MP2493DS-LF-P is available at Aetrix Electronics and suitable for automotive cigarette lighter adapters, USB power supplies, and linear charger front-ends requiring stable component supply, RoHS-compliant packaging, and long-term industrial lifecycle support.
Supply support for MP2493DS-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, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP2493 belongs to MPS's low-EMI buck converter product line, engineered for automotive, industrial, and consumer applications demanding robust overcurrent protection, wide input range, and minimal external component count.
FAQ
What is the maximum output voltage achievable with MP2493DS-LF-P?
The MP2493DS-LF-P supports output voltages from 0.8V to 15V when input voltage exceeds 16.5V. If VIN ≤16.5V, the maximum output is VIN – 1.5V to ensure proper regulation margin. This limitation arises from internal reference and error amplifier headroom requirements, not from the feedback divider itself.
Can MP2493DS-LF-P operate without an external bootstrap capacitor?
No. The BST pin requires a 0.1μF ceramic capacitor connected between BST and SW to generate the floating gate drive voltage for the internal high-side MOSFET. Omitting this capacitor prevents proper switch turn-on and causes immediate functional failure or erratic regulation.
How does the ISP/ISN current limit differ from traditional cycle-by-cycle overcurrent protection?
The ISP/ISN path implements average current limiting by comparing VISP–VISN to a 100mV threshold and pulling down the SS pin to reduce duty cycle. Cycle-by-cycle OCP acts independently on peak switch current ≥2.5A and resets each clock cycle - providing fast short-circuit response while ISP/ISN handles sustained overload conditions.
Is MP2493DS-LF-P compatible with ceramic output capacitors below 10μF?
Yes - the MP2493DS-LF-P is specifically designed for stability with low-ESR ceramic capacitors. Minimum recommended value is 4.7μF (as shown in typical application), and phase margin remains >45° with 10μF X5R/X7R types. Smaller values may compromise transient response but not basic stability.
Does MP2493DS-LF-P include enable (EN) functionality?
No. The MP2493DS-LF-P lacks an EN pin; it starts switching automatically when VIN rises above the 3.3V UVLO threshold. Enable functionality is only present on the MP2493DQ variant (not this part number), which adds an active-high EN pin with 1.8V logic threshold.
What is the minimum recommended inductor value for MP2493DS-LF-P at 12VIN/5VOUT?
For 12VIN/5VOUT/2A operation, the recommended inductance is 3.3μH to 10μH. A 4.7μH, 3A-rated shielded power inductor with DCR <100mΩ ensures optimal efficiency (>92%), ripple current ~30% of load, and peak inductor current <2.3A.
How does thermal performance differ between MP2493DS-LF-P and MP2493DN-LF-Z packages?
The SOIC8 (DS) has θJA = 90°C/W, limiting continuous 2A output to ≤+55°C ambient with standard 4-layer PCB. The SOIC8E (DN) achieves θJA = 50°C/W due to its exposed thermal pad, allowing full 2A operation up to +75°C ambient - a 20°C improvement in usable temperature range.
MP2493DS-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 15V
- Current - Output:
- 2A
- Frequency - Switching:
- 130kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MP2493DS-LF-P FAQ
1.How can I place an order for MP2493DS-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2493DS-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 MP2493DS-LF-P reliable?
The price and inventory of MP2493DS-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 MP2493DS-LF-P is usually 5 days.
3.What payment methods are accepted for MP2493DS-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2493DS-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2493DS-LF-P?
MP2493DS-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2493DS-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 MP2493DS-LF-P?
For technical support, including MP2493DS-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2493DS-LF-P requirements.
6.How does Aetrix verify that MP2493DS-LF-P is sourced from the original manufacturer or authorized distributors?
All MP2493DS-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 MP2493DS-LF-P meets industry standards.
7.What is the process for return or replacement of MP2493DS-LF-P?
All MP2493DS-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2493DS-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 MP2493DS-LF-P part is unused and in its original packaging.
Return procedure for MP2493DS-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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