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Monolithic Power Systems Inc. MP2495DS-LF
- Part No.:
- MP2495DS-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP2495DS-LF.pdf
- Description:
- IC REG BUCK ADJ 2A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,907
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Product details
Overview
MP2495DS-LF from Monolithic Power Systems is a monolithic 100V load dump-protected buck regulator with integrated overvoltage protection switch and programmable 2A output current limit. It delivers up to 2.0A continuous output current across 6.5V–16V input, supports 0.8V–15V adjustable output voltage, features 700kHz fixed-frequency operation, and integrates 0.25Ω internal high-side MOSFET for automotive cigarette lighter adapters and USB power supplies.
For engineers reviewing the MP2495DS-LF datasheet, MP2495DS-LF pinout, MP2495DS-LF application, or MP2495DS-LF equivalent, this device serves as a single-chip solution for 100V transient-tolerant DC/DC conversion with precise current limiting, thermal shutdown, and cycle-by-cycle overcurrent protection in space-constrained industrial and automotive power systems.
Technical Context
The MP2495DS-LF implements current-mode control with a 700kHz oscillator and slope compensation to ensure stable regulation under wide line/load conditions. Its dual-loop architecture combines a voltage regulation loop (FB pin referenced to 0.805V bandgap) and an independent current-limit loop (100mV ISP–ISN threshold) that pulls down the SS pin to enforce constant-current mode when sensed load current exceeds the programmed limit.
Input surge protection is handled by an integrated 100V-rated OVP switch (0.3Ω on-resistance), controlled via the CTR pin using an external Zener diode. The device operates with a 3.3V UVLO threshold and includes bootstrap gate drive (BST–SW) for efficient high-side switching, while thermal shutdown activates at 150°C to prevent permanent damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5V to 16V continuous; survives 100V/100ms transients for automotive load dump immunity |
| Output Voltage Range | 0.8V to 15V, set by external resistor divider; FB reference = 0.805V ±2.5% |
| Max Output Current | 2.0A continuous; programmable via ISP/ISN sense voltage (100mV threshold) |
| Switching Frequency | Fixed 700kHz ±20%; enables compact magnetics and low-output-ripple design |
| Internal MOSFET RDS(ON) | 0.25Ω typical; reduces conduction loss and eliminates need for external high-voltage switch |
| Efficiency | 95% at 500mA, VOUT=5V; optimized for ceramic-capacitor-based output filtering |
| Thermal Shutdown | 150°C junction temperature; self-recovering after fault removal |
Pinout & Package
MP2495DS-LF is housed in a 16-pin SOIC package (JEDEC MS-012 AC compliant) with exposed pad not present; thermal resistance θJA = 80°C/W on 4-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Feedback input | Connects to resistor divider to set output voltage; 0.805V reference enables precision regulation |
| 2 SS | Soft-start & current-limit compensation | External capacitor sets soft-start time and stabilizes current-limit loop bandwidth (<1kHz) |
| 3 ISP / 4 ISN | Differential current sense inputs | Monitor load current via sense resistor or inductor DCR; 100mV threshold triggers current limiting |
| 5 CTR | OVP clamp control | Tied to Zener diode to define clamping voltage during surge events (e.g., 12V Zener for 12V system) |
| 7,8 IN | High-voltage input supply | Parallel pins accept up to 100V transients; connect directly to battery or unregulated source |
| 9,10 OUT | VDD supply output | Provides regulated bias voltage to internal circuitry; also drain of OVP switch |
| 12 BST | Bootstrap capacitor connection | Forms floating supply for high-side gate drive; requires capacitor between BST and SW |
| 13 SW | Switch node | Drives external inductor; connects to internal 0.25Ω MOSFET source |
| 14 VDD | Internal supply bypass | Bypass capacitor required; powers control logic and gate driver |
| 15 GND | Power and signal reference | Low-impedance ground return for feedback, current sense, and switching paths |
| 16 EN | Enable control | Logic-level input (1.8V high, 0.4V low); disables regulator and reduces quiescent current to 4μA |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100V OVP switch | Replaces discrete Transorb + MOSFET; 0.3Ω on-resistance minimizes clamping loss during load dump |
| Programmable 2A current limit | Set via ISP/ISN differential sense without power loss in series resistor; supports DCR or precision shunt sensing |
| Stable with ceramic output capacitors | No ESR requirement; compatible with low-ESR X5R/X7R MLCCs for compact, low-noise designs |
| Fixed 700kHz switching frequency | Enables predictable EMI filtering and small external inductor (e.g., 12μH typical) |
| Cycle-by-cycle overcurrent protection | Prevents MOSFET failure during short-circuit by limiting peak inductor current each cycle |
Applications
| Automotive Cigarette Lighter Adapters | USB Power Supplies |
|---|---|
Use Scenario: Converting 12V vehicle battery to 5V/2A USB charging port with robustness against engine cranking and load dump surges. IC Role / Device Role / Timing Role: Primary buck regulator with integrated 100V OVP switch and programmable current limit; handles transient suppression and DC/DC conversion in one IC. Use Value: Eliminates need for external TVS and high-voltage MOSFET; maintains regulated 5V output even during 80V/100ms load dump events. | Use Scenario: Compact wall-mounted or portable USB charger delivering 5V/2A from wide-input unregulated sources. IC Role / Device Role / Timing Role: Constant-voltage/constant-current buck controller; uses ISP/ISN pins to enforce strict 2A current limit during heavy-load or short-circuit conditions. Use Value: Enables compliance with USB BC1.2 current limits without secondary current-sense IC; achieves >95% efficiency at 500mA load. |
| Power Supply for Linear Chargers | Industrial 24V-to-5V Conversion |
Use Scenario: Providing clean, current-limited 5V supply to linear battery chargers in automotive infotainment systems. IC Role / Device Role / Timing Role: Pre-regulator with tight current limiting (±5% via 100mV ISP–ISN threshold) to protect downstream linear charger ICs from overcurrent stress. Use Value: Prevents thermal runaway in linear chargers by enforcing hard 2A limit before output collapse; soft-start (SS pin) avoids inrush into capacitive loads. | Use Scenario: Converting 24V industrial bus to 5V for microcontrollers and sensors in harsh environments with voltage spikes. IC Role / Device Role / Timing Role: High-input-voltage buck converter with thermal shutdown (150°C) and UVLO (3.3V) for reliable operation in variable-temperature enclosures. Use Value: Sustains 2A output at 24V input with 90%+ efficiency; SOIC16 package allows standard reflow assembly and thermal management on 4-layer PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage buck regulator with current limiting applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ2495DQ-LF-Z | Automotive-grade AEC-Q100 qualified version; identical electrical specs but enhanced reliability testing and extended temperature range (–40°C to +125°C) | Required for automotive OEM production; same pinout and footprint as MP2495DS-LF | Select when functional safety or qualification documentation is mandatory |
| LM5164QPWPRQ1 | 42V max input, no integrated OVP switch; requires external TVS and high-side FET; 1.5A max output | Suitable for lower-voltage industrial systems where 100V surge immunity is not needed | Choose only if input stays below 42V and external component count is acceptable |
Compared with MP2495DS-LF, the MPQ2495DQ-LF-Z adds AEC-Q100 qualification without changing functionality, while the LM5164QPWPRQ1 lacks integrated surge protection and current-limiting precision, requiring more external components and offering lower output current capability.
Availability
MP2495DS-LF is available at Aetrix Electronics and suitable for automotive cigarette lighter adapters, USB power supplies, and industrial 24V-to-5V conversion requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2495DS-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 converters, LED drivers, and motor drivers.
The MP2495 belongs to MPS's high-voltage buck regulator product line, designed specifically for automotive and industrial applications demanding integrated surge protection, precise current limiting, and minimal external component count.
FAQ
What is the maximum input voltage the MP2495DS-LF can withstand during transient events?
The MP2495DS-LF is rated for 100V absolute maximum input voltage and can survive 100V transients lasting up to 100ms, as verified in load dump testing per ISO 7637-2. Its integrated OVP switch clamps input surges above the CTR-set voltage, protecting downstream circuitry without external components.
How is output current limit programmed on the MP2495DS-LF?
Output current limit is set by the differential voltage across ISP and ISN pins, with a precise 100mV threshold. A sense resistor (RSENSE) yields IOUT(LIMIT) = 100mV / RSENSE; alternatively, inductor DCR sensing is supported using the same 100mV reference and external RC network for accuracy.
Does the MP2495DS-LF require an external bootstrap diode?
No external bootstrap diode is required. The MP2495DS-LF includes an on-chip regulator that charges the BST capacitor from VDD. However, if the internal regulator proves insufficient under high-duty-cycle conditions, a Schottky diode from IN or OUT to BST may be added to assist charging.
What is the purpose of the CTR pin, and how should it be configured?
The CTR pin controls the OVP clamp voltage during surge events. It must be tied to ground through a Zener diode whose breakdown voltage matches the nominal output voltage (e.g., 12V Zener for a 12V system). This ensures clamping occurs just above normal operating voltage, minimizing power dissipation.
Can the MP2495DS-LF operate with ceramic output capacitors only?
Yes - the MP2495DS-LF is explicitly designed to be stable with low-ESR ceramic output capacitors (X5R/X7R dielectrics). No electrolytic or tantalum capacitors are required, enabling compact, high-reliability designs with excellent transient response and lifetime stability.
What is the function of the SS pin beyond soft-start?
Beyond controlling startup ramp rate, the SS pin serves as the error amplifier output for the current-limit loop. When load current exceeds the programmed limit, the current comparator pulls SS low to reduce duty cycle and enforce constant-current regulation - making SS central to both startup sequencing and fault response.
Is the MP2495DS-LF RoHS-compliant and lead-free?
Yes - the "-LF" suffix denotes lead-free, RoHS-compliant packaging. All MP2495DS-LF units meet EU RoHS Directive 2011/65/EU requirements and are manufactured using lead-free solderable terminations and green molding compounds.
MP2495DS-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 6.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 15V
- Current - Output:
- 2A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MP2495DS-LF FAQ
1.How can I place an order for MP2495DS-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2495DS-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 MP2495DS-LF reliable?
The price and inventory of MP2495DS-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2495DS-LF is usually 5 days.
3.What payment methods are accepted for MP2495DS-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2495DS-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2495DS-LF?
MP2495DS-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2495DS-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 MP2495DS-LF?
For technical support, including MP2495DS-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2495DS-LF requirements.
6.How does Aetrix verify that MP2495DS-LF is sourced from the original manufacturer or authorized distributors?
All MP2495DS-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 MP2495DS-LF meets industry standards.
7.What is the process for return or replacement of MP2495DS-LF?
All MP2495DS-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP2495DS-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 MP2495DS-LF part is unused and in its original packaging.
Return procedure for MP2495DS-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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