My Inquiry
My Account
Monolithic Power Systems Inc. MP24971DN-LF-P
- Part No.:
- MP24971DN-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP24971DN-LF-P.pdf
- Description:
- IC REG BUCK 5V 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,084
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP24971DN-LF-P from Monolithic Power Systems is a monolithic 5V/1.5A fixed-output step-down DC-DC converter with programmable current limit and output line-drop compensation. It operates across an 8V–50V input range, integrates a 0.4Ω internal MOSFET, and delivers stable regulation with 100kHz fixed-frequency operation-designed for USB power supplies and automotive adapters requiring robust over-voltage and thermal protection.
For engineers reviewing the MP24971DN-LF-P datasheet, MP24971DN-LF-P pinout, MP24971DN-LF-P application, or MP24971DN-LF-P equivalent, key selection criteria include its 5V fixed output, 1.5A continuous current capability, SOIC8E package with exposed thermal pad, and integrated line-drop compensation for long-trace load-side voltage stability.
Technical Context
The MP24971DN-LF-P implements current-mode control with a 100kHz oscillator and internal ramp compensation to ensure stable loop dynamics across wide input and load variations. Its error amplifier references a precise 0.8V internal bandgap and compares against feedback from the VOS pin to regulate output voltage.
Current sensing occurs differentially across ISP and ISN pins with a 100mV threshold, enabling hiccup-mode current limiting and short-circuit protection. Output over-voltage protection triggers at 6V sensed at ISN, while VOC pin programming enables trace-resistance-based line-drop compensation using external RC networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V ±3% (4.85V–5.15V), tightly regulated across 8V–50V input and 0–1.5A load. |
| Continuous Output Current | 1.5A, supported by internal 0.4Ω MOSFET and SOIC8E thermal performance (θJA = 50°C/W). |
| Switching Frequency | Fixed 100kHz (70–140kHz tolerance), enabling predictable EMI filtering and inductor sizing. |
| Input Voltage Range | 8V to 50V operating range, with 60V absolute maximum-suited for 12V/24V/48V industrial and automotive rails. |
| Current Sense Threshold | 100mV differential (ISP–ISN), enabling accurate 1.5A current limit with 66mΩ sense resistor. |
| Line-Drop Compensation Gain | Programmable via VOC pin: 200–700mV output adjustment per 50–100mV sense voltage change. |
| Soft-Start Duration | Internal 4ms soft-start prevents inrush current and ensures controlled VOUT ramp-up at power-on. |
Pinout & Package
MP24971DN-LF-P is housed in an SOIC8E (exposed pad) package, optimized for thermal dissipation with θJC = 10°C/W and θJA = 50°C/W on a 4-layer PCB. The exposed GND pad must be soldered to a thermal plane for reliable 1.5A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Unregulated input supply | Accepts 8V–50V; connects to input capacitor bank and feeds internal regulator and high-side MOSFET drain. |
| 2 GND | Ground reference & thermal pad | Primary ground return; exposed pad must be connected to PCB GND plane for thermal management and noise isolation. |
| 3 VOS | Output voltage sense input | Direct connection to VOUT for precision feedback; enables tight load regulation and OVP detection. |
| 4 VOC | Line-drop compensation adjust | Connects to GND via resistor to program load-line gain-compensates for IR drop in long PCB traces or cables. |
| 5 ISN | Negative current sense input | Differential input paired with ISP; senses low-side current through RSENSE; triggers OVP if >6V. |
| 6 ISP | Positive current sense input | Differential input paired with ISN; used for hiccup current limit and short-circuit protection. |
| 7 BST | Bootstrap supply for gate driver | Connects via 0.1µF capacitor to SW; provides floating voltage to drive high-side MOSFET gate above VIN. |
| 8 SW | Switch node output | Drives external inductor; high dv/dt node requiring short, low-inductance routing to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.4Ω Power MOSFET | Eliminates external high-side switch, reduces BOM count, and enables compact 5V/1.5A buck design in SOIC8E. |
| Programmable Line-Drop Compensation | VOC pin allows dynamic adjustment of output voltage based on load current-maintains 5V at remote load despite trace resistance. |
| Hiccup-Mode Current Limit | Shuts down on overcurrent, auto-restarts after fault clears-limits average short-circuit power dissipation and improves reliability. |
| Fixed 100kHz Switching Frequency | Enables consistent EMI filter design and predictable inductor sizing without frequency jitter or spread-spectrum complexity. |
| Stable with Ceramic Output Capacitors | Supports low-ESR X5R/X7R ceramics (e.g., 22µF + 100µF), reducing solution size and eliminating electrolytic capacitor aging concerns. |
Applications
| USB Power Supplies | Automotive Power Adapters |
|---|---|
|
Use Scenario: 12V vehicle battery powering 5V USB-A/USB-C ports in infotainment or accessory modules. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 5V/1.5A with line-drop compensation for cable-connected peripherals. Use Value: Maintains stable 5V at connector despite up to 200mV IR drop across harness wiring, avoiding USB enumeration failures. |
Use Scenario: Converting 24V truck or bus battery to 5V for telematics, GPS, or camera modules. IC Role / Device Role / Timing Role: High-input-voltage buck converter with OVP and thermal shutdown for harsh automotive environments. Use Value: Withstands 50V transients and sustains 1.5A output under 125°C junction temperature-meets AEC-Q100 stress requirements. |
| Linear Charger Power Supplies | Industrial IoT Sensor Nodes |
|
Use Scenario: Providing clean 5V bias to linear battery chargers (e.g., TP4056) in portable medical or handheld devices. IC Role / Device Role / Timing Role: Pre-regulator ensuring constant 5V input to charger IC, independent of varying source voltage (e.g., 12–48V PoE or adapter). Use Value: Fixed 5V output eliminates need for post-regulation LDO, improving efficiency and reducing thermal load on charger IC. |
Use Scenario: Powering low-power wireless sensor nodes (LoRaWAN, NB-IoT) deployed in remote industrial locations with 24V/48V DC distribution. IC Role / Device Role / Timing Role: Robust, low-maintenance DC-DC stage converting unregulated field bus voltage to stable 5V microcontroller rail. Use Value: SOIC8E thermal performance and hiccup protection enable maintenance-free operation in sealed enclosures without forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP24943DN-LF-Z | Same SOIC8E package, but 3.3V fixed output and 2A rating; no VOC pin or line-drop compensation. | Suitable only where 3.3V rail is required and trace compensation is unnecessary. | Select when higher current (2A) and lower output voltage are needed-but not for 5V/line-drop use cases. |
| LM5164QDRCRQ1 | Automotive-grade 1.5A buck with adjustable output (1.2V–55V), no fixed 5V option; requires external feedback resistors. | Requires additional components and layout effort; lacks integrated line-drop compensation circuitry. | Choose for AEC-Q100-compliant designs needing flexibility-but adds BOM cost and design overhead vs. MP24971DN-LF-P's plug-and-play 5V solution. |
Compared with MP24943DN-LF-Z and LM5164QDRCRQ1, the MP24971DN-LF-P uniquely combines factory-trimmed 5V output, SOIC8E thermal capability, and hardware-programmable line-drop compensation-making it optimal for cost-sensitive, space-constrained 5V adapter designs where load-side voltage accuracy is critical.
Availability
MP24971DN-LF-P is available at Aetrix Electronics and suitable for USB power supplies, automotive power adapters, and linear charger power supplies requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MP24971DN-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 mixed-signal ICs for power management, motion control, and interface applications.
The MP24971 belongs to MPS's industrial-grade buck converter product line, engineered for rugged 8V–50V input applications demanding fixed-output simplicity, thermal resilience, and system-level protection without external complexity.
FAQ
What is the maximum recommended output current for continuous operation?
The MP24971DN-LF-P delivers 1.5A continuously under typical conditions (TA = 25°C, SOIC8E package, adequate PCB copper). At 125°C junction temperature, derating applies-maximum sustainable current drops to ~1.1A due to thermal limits defined by θJA = 50°C/W and 2.5W PD(max).
Does MP24971DN-LF-P require an external bootstrap diode?
An external bootstrap diode (e.g., BAT54) is optional but recommended when duty cycle exceeds 65%-such as at VIN > 30V with 5V output-to ensure reliable BST capacitor charging and prevent high-side MOSFET underdrive during heavy loads.
How is output line-drop compensation configured?
Line-drop compensation is set by connecting a resistor from VOC to GND. Its value is calculated as RC = (6 × RSENSE × 300kΩ) / RTRACE, where RSENSE is the current-sense resistor (e.g., 66mΩ) and RTRACE is the estimated PCB trace resistance between VOUT and load.
What protection features are integrated?
The device integrates hiccup-mode current limit, output over-voltage protection (6V threshold), thermal shutdown (150°C), and short-circuit protection. All functions operate autonomously without external components-no enable pins or configuration registers required.
Can MP24971DN-LF-P operate with ceramic output capacitors only?
Yes-it is explicitly characterized and stable with low-ESR ceramic capacitors (e.g., 22µF X5R + 100µF X5R), eliminating the need for aluminum or tantalum electrolytics and improving lifetime reliability in high-temperature environments.
Is the 5V output internally trimmed or resistor-programmed?
The 5V output is factory-trimmed and fixed-no external resistors are required for setting VOUT. The internal 0.8V reference and feedback amplifier are laser-trimmed to achieve ±3% output accuracy across temperature and line/load conditions.
What is the minimum input voltage for reliable startup?
Startup requires VIN ≥ 3.5V (UVLO rising threshold), but guaranteed operation begins at VIN = 8V per datasheet specifications. Below 8V, output regulation and current capability are not assured-even if the part powers on.
MP24971DN-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:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 8V
- Voltage - Input (Max):
- 50V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.5A
- Frequency - Switching:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MP24971DN-LF-P FAQ
1.How can I place an order for MP24971DN-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP24971DN-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 MP24971DN-LF-P reliable?
The price and inventory of MP24971DN-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 MP24971DN-LF-P is usually 5 days.
3.What payment methods are accepted for MP24971DN-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP24971DN-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP24971DN-LF-P?
MP24971DN-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP24971DN-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 MP24971DN-LF-P?
For technical support, including MP24971DN-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP24971DN-LF-P requirements.
6.How does Aetrix verify that MP24971DN-LF-P is sourced from the original manufacturer or authorized distributors?
All MP24971DN-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 MP24971DN-LF-P meets industry standards.
7.What is the process for return or replacement of MP24971DN-LF-P?
All MP24971DN-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP24971DN-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 MP24971DN-LF-P part is unused and in its original packaging.
Return procedure for MP24971DN-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP24971DN-LF-P Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
