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Monolithic Power Systems Inc. MP2141QGTF-18-Z
- Part No.:
- MP2141QGTF-18-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-563, SOT-666
- Datasheet:
-
MP2141QGTF-18-Z.pdf
- Description:
- IC REG 1.5A SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:2,915
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Product details
Overview
MP2141QGTF-18-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 120mΩ P-channel and 80mΩ N-channel MOSFETs, delivering up to 1.5A continuous output current at fixed 1.8V from a 2.3V–5.5V input. It employs constant-on-time (COT) control for fast transient response and supports dynamic PFM/PWM mode selection via the VSEL pin. It is used in DDR memory power rails and portable instrumentation where low quiescent current (20μA in PFM) and ultra-small SOT563 packaging are critical.
For engineers reviewing the MP2141QGTF-18-Z datasheet, MP2141QGTF-18-Z pinout, MP2141QGTF-18-Z application, or MP2141QGTF-18-Z equivalent, key selection considerations include its 1.8V fixed output, 20μA PFM quiescent current, VSEL-controlled light-load efficiency trade-off, 100% duty cycle capability, and thermal shutdown at 160°C - all validated in automotive-grade AEC-Q100 qualified operation.
Technical Context
The MP2141QGTF-18-Z implements a constant-on-time (COT) control architecture with input-voltage feed-forward, enabling stable switching frequency (1.65–2.75MHz over temperature) and rapid load transient recovery without external compensation. Its internal power stage integrates complementary PCH/NCH MOSFETs with on-resistances of 120mΩ/80mΩ, supporting high-efficiency operation down to 2.3V input.
It features dual operating modes: PFM (enabled when VSEL < 0.4V or floating) for ultra-low IQ (20μA) and high light-load efficiency, and PWM (enabled when VSEL > 1.2V) for tighter output ripple and faster transient response - with 5μs PFM→PWM and 10μs PWM→PFM transition delays. Fault protection includes cycle-by-cycle current limiting (2.7A peak), hiccup-mode short-circuit protection, and thermal shutdown with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% over -40°C to +125°C; ensures stable DDR/codec core rail without external feedback resistors. |
| Max Output Current | 1.5A continuous; supports high-current portable SoC subsystems with minimal thermal derating in SOT563. |
| Input Voltage Range | 2.3V to 5.5V; compatible with single-cell Li-ion (2.7–4.2V), USB-powered, and 3.3V/5V system rails. |
| Quiescent Current | 20μA in PFM mode; enables multi-week battery life in always-on sensor nodes and wearables. |
| Switching Frequency | 1.65–2.75MHz (typ. 2.2MHz); allows use of sub-1μH inductors and compact ceramic output capacitors. |
| Thermal Shutdown | 160°C with 30°C hysteresis; prevents permanent damage during sustained overload or poor PCB thermal design. |
| Efficiency | 90% at 1A, 3.6VIN/1.8VOUT; reduces power loss and case temperature rise in space-constrained layouts. |
Pinout & Package
The MP2141QGTF-18-Z is housed in a 6-pin SOT563 package (1.6mm × 1.6mm × 0.55mm), optimized for ultra-dense portable PCBs and thermally enhanced with exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSEL (Pin 1) | Mode selection input | Logic-high (>1.2V) forces PWM mode; logic-low (<0.4V) or floating enables PFM for lowest IQ. |
| GND (Pin 2) | Power ground reference | Primary return path for high-frequency switch node current; must be low-inductance connection to thermal pad. |
| VIN (Pin 3) | Main input supply | Accepts 2.3–5.5V unregulated input; requires local 10μF ceramic decoupling within 2mm. |
| SW (Pin 4) | Switching node | Drain of internal high-side P-MOSFET; connects directly to inductor; carries full AC switching current. |
| EN (Pin 5) | Enable control | Active-high enable with 0.78MΩ internal pull-down; supports power sequencing and standby mode. |
| OUT (Pin 6) | Regulated output | 1.8V power rail and feedback sense point; requires ≥10μF low-ESR ceramic capacitor at device pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power FETs | 120mΩ PCH / 80mΩ NCH MOSFETs eliminate external switches and reduce BOM count by 4 components. |
| VSEL-Controlled Mode Switching | Hardware-selectable PFM/PWM via single resistor or GPIO; enables dynamic efficiency vs. ripple trade-off in real time. |
| Output Discharge Function | Internal 250Ω discharge path activates automatically during shutdown; prevents residual voltage hold-up on load. |
| 100% Duty Cycle Operation | Maintains regulation down to VIN ≈ VOUT; essential for battery-powered systems near end-of-discharge. |
| AEC-Q100 Qualified | Grade 1 (-40°C to +125°C) qualification confirms suitability for automotive infotainment and ADAS subsystems. |
Applications
| DDR Memory Power Rail | Portable Medical Instrumentation |
|---|---|
Use Scenario: Supplying 1.8V VDDQ rail for LPDDR2/LPDDR3 memory in handheld ultrasound or glucose monitors. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated 1.5A with <10mV ripple and fast load-step response to memory burst access. Use Value: Enables reliable memory interface timing margin while extending battery runtime via 20μA PFM quiescent current. | Use Scenario: Powering analog front-end (AFE) and microcontroller in battery-operated ECG or pulse oximeter. IC Role / Device Role / Timing Role: Main system regulator converting single Li-ion cell (3.0–4.2V) to stable 1.8V for precision ADC reference and digital logic. Use Value: Maintains 1.8V accuracy across full battery range and temperature, with 100% duty cycle preventing brownout at low VIN. |
| Wireless Charging Receiver | Industrial Sensor Node |
Use Scenario: Regulating rectified Qi receiver output (3–5V) to 1.8V for Bluetooth LE SoC and sensor interface. IC Role / Device Role / Timing Role: Efficient post-regulator providing low-noise 1.8V supply with minimal footprint adjacent to coil and MCU. Use Value: Achieves >90% efficiency at 1A while fitting within tight coil clearance constraints using SOT563 package. | Use Scenario: Powering LoRaWAN or NB-IoT edge node with intermittent wake-up and long sleep cycles. IC Role / Device Role / Timing Role: Always-on buck converter supplying MCU and RF transceiver from primary lithium thionyl chloride cell. Use Value: Delivers 20μA PFM IQ and automatic output discharge, enabling 10+ year battery life in remote deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62172DSGR | Fixed 1.8V output, 0.6–5.5V input, 0.5A max, 2.25MHz switching, no VSEL pin | Limited to lower current; lacks dynamic PFM/PWM selection and 100% duty cycle | Select only if <0.5A load and simplified control (no VSEL routing) are acceptable |
| RT7295BGJ6F | Adjustable output (0.6–5.5V), 2A max, 1.5MHz, no VSEL, different enable threshold (0.9V) | Requires external feedback resistors; higher current but less optimized for fixed 1.8V DDR rails | Choose when adjustable output or higher current headroom is needed, accepting added BOM and layout complexity |
Compared with TPS62172DSGR and RT7295BGJ6F, the MP2141QGTF-18-Z uniquely combines fixed 1.8V output, 1.5A capability, VSEL-driven efficiency modulation, and 100% duty cycle in a 1.6mm² package - making it optimal for space- and battery-life-constrained DDR and portable instrumentation designs.
Availability
MP2141QGTF-18-Z is available at Aetrix Electronics and suitable for DDR memory power rails, portable medical instrumentation, wireless charging receivers, and industrial sensor nodes requiring stable component supply with automotive-grade reliability and ultra-low quiescent current.
Supply support for MP2141QGTF-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP2141Q series belongs to MPS's automotive-qualified DC/DC converter product line, engineered specifically for space-constrained, battery-sensitive applications in infotainment, ADAS, and portable industrial electronics demanding AEC-Q100 Grade 1 compliance and ultra-low IQ.
FAQ
What is the purpose of the VSEL pin on the MP2141QGTF-18-Z?
The VSEL pin selects between PFM and PWM operating modes: logic-low (<0.4V) or floating enables PFM for ultra-low 20μA quiescent current and high light-load efficiency; logic-high (>1.2V) forces PWM mode for tighter output ripple and faster transient response. Transition delays are 5μs (PFM→PWM) and 10μs (PWM→PFM), with internal 1MΩ pull-down resistance.
Does the MP2141QGTF-18-Z require external feedback resistors?
No. The MP2141QGTF-18-Z provides a fixed 1.8V output via internal resistor divider, eliminating external feedback components. This simplifies layout, improves accuracy (±1% over temperature), and reduces BOM cost - ideal for DDR VDDQ and other fixed-rail applications.
How does the MP2141QGTF-18-Z handle short-circuit conditions?
Under short-circuit, the MP2141QGTF-18-Z enters hiccup-mode protection: it disables the power stage, discharges the soft-start capacitor, and attempts automatic recovery after a delay. This limits average power dissipation and prevents thermal runaway while maintaining self-recovery capability without external intervention.
Can the MP2141QGTF-18-Z operate with input voltage equal to output voltage?
Yes. The MP2141QGTF-18-Z supports 100% duty cycle operation, allowing regulation down to VIN ≈ VOUT (1.8V). This extends usable battery life in single-cell Li-ion systems by preventing brownout during deep discharge, unlike many buck converters that drop out below VIN = VOUT + dropout voltage.
What is the recommended input capacitor for MP2141QGTF-18-Z?
A minimum 10μF X5R/X7R ceramic capacitor placed within 2mm of VIN and GND pins is recommended. For robustness, a 22μF capacitor is preferred - especially under high ripple current conditions - to limit input voltage spikes and ensure stable COT control loop performance across the 2.3–5.5V input range.
Is the MP2141QGTF-18-Z qualified for automotive applications?
Yes. The MP2141QGTF-18-Z is AEC-Q100 Grade 1 qualified (-40°C to +125°C), with guaranteed operation across the full junction temperature range, thermal shutdown at 160°C, and built-in protections including cycle-by-cycle current limiting and short-circuit hiccup mode - meeting requirements for infotainment and body electronics.
Does the MP2141QGTF-18-Z provide output discharge during shutdown?
Yes. When EN is pulled low or left floating, the MP2141QGTF-18-Z automatically activates an internal 250Ω discharge path between OUT and GND. This safely bleeds stored charge from the output capacitor, preventing residual voltage from interfering with downstream logic sequencing or causing latch-up in powered-off subsystems.
MP2141QGTF-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
MP2141QGTF-18-Z FAQ
1.How can I place an order for MP2141QGTF-18-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2141QGTF-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 MP2141QGTF-18-Z reliable?
The price and inventory of MP2141QGTF-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 MP2141QGTF-18-Z is usually 5 days.
3.What payment methods are accepted for MP2141QGTF-18-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2141QGTF-18-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2141QGTF-18-Z?
MP2141QGTF-18-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2141QGTF-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 MP2141QGTF-18-Z?
For technical support, including MP2141QGTF-18-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2141QGTF-18-Z requirements.
6.How does Aetrix verify that MP2141QGTF-18-Z is sourced from the original manufacturer or authorized distributors?
All MP2141QGTF-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 MP2141QGTF-18-Z meets industry standards.
7.What is the process for return or replacement of MP2141QGTF-18-Z?
All MP2141QGTF-18-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2141QGTF-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 MP2141QGTF-18-Z part is unused and in its original packaging.
Return procedure for MP2141QGTF-18-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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