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Monolithic Power Systems Inc. MP2141NGTF-18-P
- Part No.:
- MP2141NGTF-18-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-563, SOT-666
- Datasheet:
-
MP2141NGTF-18-P.pdf
- Description:
- IC REG BUCK 1.8V 1A SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:1,458
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Product details
Overview
MP2141NGTF-18-P from Monolithic Power Systems is a fixed-output 1.8V, 1A synchronous step-down DC/DC converter in SOT563 package, featuring 11µA quiescent current, 2.2MHz switching frequency, and constant-on-time control for fast transient response. It operates from 2.3V–5.5V input, delivers regulated 1.8V ±1.2% over temperature, and integrates 120mΩ P-FET and 80mΩ N-FET switches-ideal for powering low-voltage I/O rails in portable devices.
For engineers reviewing the MP2141NGTF-18-P datasheet, MP2141NGTF-18-P pinout, MP2141NGTF-18-P application, or MP2141NGTF-18-P equivalent, key selection considerations include its fixed 1.8V output with Power Good (PG) indicator, ultra-low IQ for battery longevity, hiccup-mode short-circuit protection, and compatibility with ceramic output capacitors without external compensation.
Technical Context
The MP2141NGTF-18-P employs constant-on-time (COT) control with input voltage feed-forward to maintain stable 2.2MHz switching across its 2.3V–5.5V input range. Its internal power stage integrates matched high-side (120mΩ) and low-side (80mΩ) MOSFETs optimized for efficiency at light loads.
Sleep mode and Advanced Asynchronous Modulation (AAM) enable ultra-low 11µA quiescent current while maintaining regulation; the PG pin provides open-drain power-good signaling with 70µs delay and 85–90% output voltage window detection-exclusive to fixed-output variants like this part.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1.2% over -40°C to +125°C - enables direct replacement of LDOs in 1.8V logic rails without feedback resistors. |
| Max Output Current | 1A continuous - supports single-core microcontrollers, RF transceivers, and sensor interfaces without thermal derating on 2-layer PCBs. |
| Quiescent Current | 11µA at VIN=3.6V - extends battery life in always-on IoT sensors and wearables by minimizing no-load power loss. |
| Switching Frequency | 2.2MHz typical - allows use of compact 1µH shielded inductors and reduces EMI filtering requirements in space-constrained layouts. |
| Input Voltage Range | 2.3V to 5.5V - compatible with single-cell Li-ion (2.7–4.2V), LiFePO₄ (2.5–3.65V), and USB-powered systems. |
| Power Good Threshold | 85–90% of VOUT - provides reliable rail monitoring for system reset sequencing with 70µs delay and 400mA sink capability. |
| Thermal Shutdown | 160°C with 30°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-off behavior. |
Pinout & Package
SOT563 package: 1.6mm × 1.6mm × 0.55mm, 6-pin ultra-small outline transistor with exposed thermal pad (not electrically connected), lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | PG | Open-drain Power Good output - requires external pull-up to VIN; asserts low when VOUT drops below 85% of 1.8V. |
| 2 | GND | Power ground reference - must be connected to low-impedance PCB ground plane for thermal and noise performance. |
| 3 | VIN | Main input supply - accepts 2.3V–5.5V; requires local 10µF ceramic decoupling capacitor placed adjacent to pin. |
| 4 | SW | Switch node - connects directly to inductor; carries high di/dt; must be routed short and away from sensitive analog traces. |
| 5 | EN | Enable control - active-high logic (≥1.2V); internal 1MΩ pulldown allows default disable when floating. |
| 6 | OUT | Regulated output - supplies 1.8V load; connects to output capacitor and load; includes internal discharge FET for safe shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 11µA enables >1-year battery life in coin-cell-powered BLE sensors operating at 10µA average load. |
| Integrated power MOSFETs | 120mΩ P-FET + 80mΩ N-FET eliminates external switch losses and simplifies BOM for sub-2mm² footprint designs. |
| Hiccup-mode short-circuit protection | Auto-retry recovery prevents thermal runaway during sustained faults - critical for unattended embedded deployments. |
| Stable with ceramic output capacitors | No external compensation required - reduces component count and layout sensitivity for rapid prototyping. |
| Output discharge function | Internal 1kΩ discharge path pulls VOUT to GND within 1ms after EN deactivation - avoids floating rail issues in multi-rail systems. |
Applications
| Wireless Networking Cards | Portable Medical Sensors |
|---|---|
Use Scenario: Powering 2.4GHz Wi-Fi/BLE modules on mini-PCIe or M.2 cards with tight thermal constraints. IC Role / Device Role / Timing Role: Primary 1.8V core supply for radio baseband ICs and memory interfaces. Use Value: 2.2MHz operation minimizes conducted EMI near RF front-end; 11µA IQ extends standby time between wireless transmissions. | Use Scenario: Continuous glucose monitor (CGM) patch with CR2032 coin cell and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Main 1.8V rail for ultra-low-power MCU and analog front-end. Use Value: Fixed 1.8V output eliminates resistor divider error; PG signal triggers firmware reset if battery voltage sags below regulation. |
| Industrial Handheld Scanners | Low-Voltage FPGA I/O Banks |
Use Scenario: Ruggedized barcode scanner with cold-temperature operation (-20°C) and intermittent high-current laser pulses. IC Role / Device Role / Timing Role: Dedicated 1.8V supply for image sensor interface and decode ASIC. Use Value: 160°C thermal shutdown with 30°C hysteresis ensures reliable operation under mechanical enclosure heat buildup. | Use Scenario: Configurable logic device requiring precise 1.8V I/O voltage with fast load transient response. IC Role / Device Role / Timing Role: Point-of-load regulator for FPGA bank powering LVCMOS18 peripherals. Use Value: COT control delivers <10µs output voltage recovery from 500mA step load - prevents timing violations during burst data transfers. |
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 |
|---|---|---|---|
| TI TPS62231DRYR | Fixed 1.8V, 1A, 17µA IQ, 3MHz, no PG pin - uses voltage-mode PWM instead of COT. | Lacks power-good signaling; higher IQ reduces battery runtime in always-on use cases. | Choose only if higher switching frequency is mandatory and PG is unnecessary. |
| Analog Devices ADP2301AUJZ-1.8-R7 | Fixed 1.8V, 0.6A, 30µA IQ, 700kHz, integrated soft-start - no hiccup protection or output discharge. | Lower current rating limits use to sub-600mA loads; slower frequency increases inductor size. | Select only for cost-sensitive, low-current applications where thermal margin is ample. |
Compared with TPS62231DRYR and ADP2301AUJZ-1.8-R7, the MP2141NGTF-18-P uniquely combines 1A capability, 11µA IQ, PG signaling, and hiccup protection in a 1.6mm² package-making it optimal for space- and battery-constrained 1.8V systems requiring robust fault handling.
Availability
MP2141NGTF-18-P is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld scanners, wireless networking cards, and low-voltage FPGA I/O banks requiring stable component supply with guaranteed long-term sourcing.
Supply support for MP2141NGTF-18-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 manufacturing partners across Asia.
The MP2141N product line targets ultra-low-power, space-constrained DC/DC conversion in battery-operated and portable electronics-emphasizing minimal IQ, small footprint, and robust protection features without external components.
FAQ
What is the purpose of the PG pin on MP2141NGTF-18-P?
The PG (Power Good) pin is an open-drain output that signals when the 1.8V output is within 85–90% regulation window. It requires an external pull-up resistor to VIN and sinks up to 400mA. Its 70µs delay ensures stable startup before system initialization, making it essential for reliable power sequencing in multi-rail designs.
Can MP2141NGTF-18-P operate from a 2.5V input?
Yes-MP2141NGTF-18-P supports input voltages from 2.3V to 5.5V. At 2.5V input, it maintains full 1A output capability with >85% efficiency using a 1µH inductor and ceramic capacitors. The 100% duty cycle feature ensures regulation even as input approaches output voltage.
Does MP2141NGTF-18-P require external compensation components?
No. The MP2141NGTF-18-P uses constant-on-time control and is internally compensated for stability with standard 10µF ceramic output capacitors. No external RC networks or type-II/type-III compensators are needed-reducing design complexity and board area.
How does the output discharge function work during shutdown?
When EN is pulled low, the MP2141NGTF-18-P activates an internal 1kΩ discharge FET between OUT and GND. This discharges the output capacitor within ~1ms, preventing residual voltage from interfering with downstream logic states or causing latch-up in multi-supply systems.
Is MP2141NGTF-18-P compatible with 0402-size external components?
Yes-the SOT563 footprint and 2.2MHz switching frequency allow full use of 0402 MLCCs (e.g., 10µF X5R input/output caps) and 0603/0805 shielded inductors (e.g., 1µH). Layout guidelines emphasize short SW/GND/VIN traces and thermal pad grounding to maintain performance at maximum load.
What protection features are built into MP2141NGTF-18-P?
It includes cycle-by-cycle current limiting (2.4A P-FET peak), hiccup-mode short-circuit protection, thermal shutdown at 160°C with 30°C hysteresis, under-voltage lockout (2.25V rising threshold), and output discharge. All operate autonomously without external circuitry.
Does MP2141NGTF-18-P support forced PWM or automatic PFM mode?
No-it uses Advanced Asynchronous Modulation (AAM) for light-load efficiency, not forced PWM. In AAM, switching frequency decreases under light loads while maintaining regulation via zero-current detection and variable on-time stretching-achieving 11µA IQ without audible noise or control-loop instability.
MP2141NGTF-18-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-563, SOT-666
- 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):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-563
MP2141NGTF-18-P FAQ
1.How can I place an order for MP2141NGTF-18-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2141NGTF-18-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 MP2141NGTF-18-P reliable?
The price and inventory of MP2141NGTF-18-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2141NGTF-18-P is usually 5 days.
3.What payment methods are accepted for MP2141NGTF-18-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2141NGTF-18-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2141NGTF-18-P?
MP2141NGTF-18-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2141NGTF-18-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 MP2141NGTF-18-P?
For technical support, including MP2141NGTF-18-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2141NGTF-18-P requirements.
6.How does Aetrix verify that MP2141NGTF-18-P is sourced from the original manufacturer or authorized distributors?
All MP2141NGTF-18-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 MP2141NGTF-18-P meets industry standards.
7.What is the process for return or replacement of MP2141NGTF-18-P?
All MP2141NGTF-18-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2141NGTF-18-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 MP2141NGTF-18-P part is unused and in its original packaging.
Return procedure for MP2141NGTF-18-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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