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Monolithic Power Systems Inc. MP2141NGTF-18-Z
- Part No.:
- MP2141NGTF-18-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-563, SOT-666
- Datasheet:
-
MP2141NGTF-18-Z.pdf
- Description:
- IC REG 1A SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:2,920
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Product details
Overview
MP2141NGTF-18-Z 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 in battery-powered systems.
For engineers reviewing the MP2141NGTF-18-Z datasheet, MP2141NGTF-18-Z pinout, MP2141NGTF-18-Z application, or MP2141NGTF-18-Z equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and confirmed alternative options with functional distinctions.
Technical Context
The MP2141NGTF-18-Z implements 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 120mΩ P-channel and 80mΩ N-channel MOSFETs enable high-efficiency 1A operation down to 1.8V output.
It integrates power-good (PG) indication on Pin 1 (open-drain), EN-controlled sequencing, soft-start (0.5ms), output discharge, hiccup-mode short-circuit protection, and thermal shutdown at 160°C with 30°C hysteresis - all optimized for low-power portable systems requiring ultra-low IQ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1.2% over -40°C to +125°C; enables direct powering of 1.8V I/O rails without external feedback resistors. |
| Max Output Current | 1A continuous; supports single-rail power for microcontrollers, sensors, or RF transceivers in space-constrained designs. |
| Quiescent Current | 11µA typical at 3.6V input; extends battery life in always-on or low-duty-cycle IoT endpoints. |
| Switching Frequency | 2.2MHz nominal; allows use of compact 1µH inductors and reduces EMI filtering requirements. |
| Input Voltage Range | 2.3V to 5.5V; compatible with single-cell Li-ion (2.7–4.2V), LiFePO₄ (2.5–3.65V), or 3.3V/5V system rails. |
| Power Good Threshold | 90% upper / 85% lower trip relative to 1.8V; provides reliable rail monitoring with 70µs delay for system reset coordination. |
| Thermal Shutdown | 160°C junction temperature with 30°C hysteresis; prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
SOT563 package: 1.6mm × 1.6mm × 0.55mm, 6-pin ultra-small outline transistor with exposed pad (not electrically connected), lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | PG (Power Good) | Open-drain output indicating regulated 1.8V output; requires external pull-up to VIN for system-level power sequencing or reset assertion. |
| 2 | GND | Power ground reference; must be connected to low-impedance PCB ground plane for stable regulation and thermal dissipation. |
| 3 | VIN | Main input supply (2.3V–5.5V); requires local 10µF ceramic decoupling capacitor placed adjacent to Pin 3 and Pin 2. |
| 4 | SW | Switching node connecting internal high-side P-MOSFET drain to external inductor; carries high di/dt and must be routed short and away from sensitive analog traces. |
| 5 | EN | Enable control with 1.2V logic-high threshold; internal 1MΩ pulldown ensures default disable; floating or grounded EN disables device and activates output discharge. |
| 6 | OUT | Regulated 1.8V output rail and current-sense input; connects directly to load and output capacitor; senses output voltage for internal regulation loop. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-On-Time Control | Delivers <10µs load transient response without external compensation components, simplifying layout and reducing BOM count. |
| Output Discharge | Internal MOSFET actively discharges VOUT when EN = low, preventing floating rail conditions and enabling safe power sequencing in multi-rail systems. |
| Hiccup-Mode SCP | Enters current-limited restart cycle upon short circuit, limiting average power dissipation and avoiding thermal runaway during fault conditions. |
| Stable with Ceramic Capacitors | Operates reliably with low-ESR ceramic output capacitors (e.g., 10µF X5R/X7R), eliminating need for bulkier tantalum or electrolytic types. |
| 100% Duty Cycle Capability | Maintains regulation even when VIN approaches VOUT (e.g., 2.5V input → 1.8V output), maximizing usable battery voltage range. |
Applications
| Wireless Sensor Node Power | Low-Power MCU Core Supply |
|---|---|
Use Scenario: Battery-powered Zigbee/Bluetooth LE sensor node operating for years on coin cell or small Li-ion. IC Role / Device Role / Timing Role: Primary 1.8V system rail regulator delivering stable power to RF transceiver and microcontroller I/O domain. Use Value: 11µA IQ minimizes no-load current draw; 2.2MHz switching enables tiny 1µH inductor and 10µF ceramic cap, reducing total solution size to <3mm². | Use Scenario: Wearable fitness tracker with ARM Cortex-M0+ MCU requiring clean, sequenced 1.8V I/O supply. IC Role / Device Role / Timing Role: Fixed-output buck converter providing regulated 1.8V rail with PG signal for controlled MCU boot sequence. Use Value: Integrated PG pin eliminates external supervisor IC; EN pin enables precise power-up timing control synchronized with system controller. |
| Industrial IoT Edge Node | Portable Medical Device Rail |
Use Scenario: Dust- and moisture-resistant environmental monitor deployed in remote locations with wide temperature range (-40°C to +85°C). IC Role / Device Role / Timing Role: Main 1.8V supply for digital isolators, ADC interface, and low-power wireless gateway IC. Use Value: Guaranteed 1.8V ±1.2% accuracy over full industrial temperature range ensures consistent sensor data acquisition and communication integrity. | Use Scenario: Handheld pulse oximeter powered by single-cell Li-ion with strict safety and reliability requirements. IC Role / Device Role / Timing Role: Safety-critical 1.8V rail for optical sensor front-end and low-noise analog signal chain. Use Value: Thermal shutdown with 30°C hysteresis prevents overheating during extended use; hiccup-mode SCP avoids latch-up during accidental short circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS62231DRYR | Fixed 1.8V, 1A, 17µA IQ, 3MHz, SOT-563; lacks integrated PG and output discharge. | No built-in power-good signal; requires external supervisor for rail monitoring; no automatic VOUT discharge on disable. | Select when higher switching frequency is prioritized over PG functionality and ultra-low IQ. |
| Analog Devices ADP2301AUJZ-1.8-R7 | Fixed 1.8V, 0.6A, 30µA IQ, 700kHz, TSOT-23-6; uses voltage-mode PWM control. | Lower current rating limits use to sub-600mA loads; slower transient response requires external compensation; larger inductor needed. | Select only for cost-sensitive, low-current applications where board space and efficiency are secondary to BOM cost. |
Compared with MP2141NGTF-18-Z, TPS62231DRYR trades PG and discharge for higher frequency but higher IQ, while ADP2301AUJZ-1.8-R7 offers lower cost at the expense of current capability, efficiency, and feature integration - making MP2141NGTF-18-Z optimal for compact, battery-life-critical 1A designs requiring full system-level power management.
Availability
MP2141NGTF-18-Z is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical devices, industrial IoT edge nodes, and low-power MCU subsystems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for MP2141NGTF-18-Z 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 over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP2141N product line targets ultra-low-power, space-constrained portable and battery-operated applications - delivering high integration, minimal external components, and industry-leading quiescent current in miniature packages like SOT563.
FAQ
What is the purpose of the PG pin on MP2141NGTF-18-Z?
The PG (Power Good) pin is an open-drain output that signals when the 1.8V output is within regulation (±1.2%). It asserts high (via external pull-up) after a 70µs delay once VOUT reaches 90% of target and deasserts when VOUT falls below 85%. This enables reliable system reset and sequencing in multi-rail designs without external supervisors.
Can MP2141NGTF-18-Z operate with input voltage below 2.3V?
No. The absolute minimum operating input voltage is 2.3V per datasheet specifications. Below this, the device enters undervoltage lockout (UVLO) and shuts down. The UVLO rising threshold is 2.25V with 150mV hysteresis, so re-enabling requires VIN ≥ 2.4V after dropout.
Does MP2141NGTF-18-Z require external feedback resistors?
No. Unlike the adjustable MP2141NGTF version, the MP2141NGTF-18-Z has factory-trimmed internal feedback for fixed 1.8V output. Pin 1 functions as PG, not FB, eliminating external resistor networks and associated leakage errors - simplifying layout and improving accuracy.
How does the output discharge function work during shutdown?
When EN is pulled low or left floating, the MP2141NGTF-18-Z activates an internal discharge MOSFET between OUT and GND. This provides a 1kΩ discharge path (typical), safely bleeding stored energy from the output capacitor within milliseconds - preventing unintended wake-up or latch-up in downstream logic.
What inductor value is recommended for MP2141NGTF-18-Z?
A 1.0µH shielded metal-alloy or multilayer chip inductor is recommended, as shown in the typical application circuit. Inductor DCR should be ≤15mΩ for optimal efficiency. For 1A load, peak inductor current is ~1.15A; select saturation current rating ≥1.5A to avoid core saturation under transient conditions.
Is MP2141NGTF-18-Z compatible with ceramic input capacitors only?
Yes - it is specifically designed for low-ESR ceramic input capacitors (e.g., 10µF X5R/X7R). Electrolytic or tantalum caps are not recommended due to higher ESR and aging effects; if used, a 0.1µF ceramic must be placed in parallel and adjacent to the IC pins to handle high-frequency ripple current.
What thermal performance can be expected in SOT563 package at 1A load?
With standard 2-layer PCB (JEDEC 51-7), θJA is 130°C/W. At 1A output and 3.6V input, typical power dissipation is ~180mW, resulting in ~23°C junction-to-ambient rise. Full derating begins above 85°C ambient; for continuous 1A operation in >70°C environments, thermal vias under the exposed pad are strongly recommended.
MP2141NGTF-18-Z 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:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-563
MP2141NGTF-18-Z FAQ
1.How can I place an order for MP2141NGTF-18-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2141NGTF-18-Z 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-Z reliable?
The price and inventory of MP2141NGTF-18-Z 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-Z is usually 5 days.
3.What payment methods are accepted for MP2141NGTF-18-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2141NGTF-18-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2141NGTF-18-Z?
MP2141NGTF-18-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2141NGTF-18-Z 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-Z?
For technical support, including MP2141NGTF-18-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2141NGTF-18-Z requirements.
6.How does Aetrix verify that MP2141NGTF-18-Z is sourced from the original manufacturer or authorized distributors?
All MP2141NGTF-18-Z 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-Z meets industry standards.
7.What is the process for return or replacement of MP2141NGTF-18-Z?
All MP2141NGTF-18-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2141NGTF-18-Z, 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-Z part is unused and in its original packaging.
Return procedure for MP2141NGTF-18-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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