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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MP2141QGTF-18-P

Name: MP2141QGTF-18-P
Brand: Monolithic Power Systems Inc.
SKU: MP2141QGTF-18-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP2141QGTF-18-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-563, SOT-666

Datasheet:: MP2141QGTF-18-P.pdf

Description:: IC REG 1.5A SOT563

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Product details

Overview

MP2141QGTF-18-P 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 operates in either PFM (20μA quiescent current) or PWM mode via the VSEL pin-ideal for DDR/codec power rails in portable instrumentation and battery-powered devices.

For engineers reviewing the MP2141QGTF-18-P datasheet, MP2141QGTF-18-P pinout, MP2141QGTF-18-P application, or MP2141QGTF-18-P equivalent, key selection considerations include its SOT563 package footprint, 100% duty cycle capability, hiccup-mode short-circuit protection, output discharge function, and compatibility with low-ESR ceramic capacitors without external compensation.

Technical Context

The MP2141QGTF-18-P implements a constant-on-time (COT) control architecture with input-voltage feed-forward, enabling stable switching frequency (1.65–2.75MHz) across its full 2.3V–5.5V input range and maintaining tight line regulation (±0.5%) and load regulation (±1%). Its dual-mode operation-PFM for ultra-low I_Q (20μA) at light loads and PWM for low-noise, high-transient performance-is selected dynamically via the VSEL pin with 5μs PFM→PWM and 10μs PWM→PFM latency.

Fault management includes cycle-by-cycle current limiting (2.7A peak), thermal shutdown at 160°C with 30°C hysteresis, and automatic hiccup-mode recovery during sustained overloads or short circuits. The internal soft-start (400μs) and output discharge path (250Ω) ensure controlled power-up/down sequencing and prevent floating rail issues in multi-rail systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.8V ±1% over -40°C to +125°C; enables direct powering of DDR I/O and codec analog cores without external feedback resistors.
Max Output Current	1.5A continuous; supports single-rail supply for low-power DSPs, audio codecs, and sensor hubs in space-constrained portable designs.
Input Voltage Range	2.3V to 5.5V; compatible with single-cell Li-ion (3.0–4.2V), USB VBUS (4.75–5.25V), and regulated 3.3V/5V system rails.
Quiescent Current	20μA in PFM mode; extends battery runtime in always-on monitoring functions and standby states of IoT edge nodes.
Switching Frequency	1.65–2.75MHz (typ. 2.2MHz); allows use of sub-1μH inductors (e.g., 0.47μH) and compact 10–47μF ceramic output capacitors.
Internal MOSFET R_DS(on)	120mΩ (HS) / 80mΩ (LS); minimizes conduction loss at 1.5A, enabling >90% efficiency at 1A with 29mΩ DCR inductor.
Protection Features	Cycle-by-cycle current limit, thermal shutdown with hysteresis, hiccup-mode SCP, and automatic output discharge on disable.

Pinout & Package

SOT563 (1.6mm × 1.6mm × 0.55mm) ultra-small surface-mount package with 6-pin top-side marking "AZH", optimized for high-density portable PCB layouts and thermally constrained applications.

Pin/Terminal	Circuit Role	Design Meaning
1 - VSEL	Mode selection control	Logic-high (>1.2V) forces PWM mode; logic-low (<0.4V) or floating enables PFM for lowest I_Q; internal 1MΩ pull-down ensures default PFM on power-up.
2 - GND	Power ground reference	Primary return path for high-current switching loop; must be connected to low-impedance ground plane adjacent to VIN and SW pins.
3 - VIN	Main power input	Accepts 2.3–5.5V unregulated input; requires local 10μF ceramic decoupling capacitor placed within 2mm of pin to suppress switching noise.
4 - SW	Switching node	Drain of internal high-side P-MOSFET; connects directly to inductor; carries high di/dt; layout must minimize loop area to reduce EMI.
5 - EN	Enable/disable control	Active-high logic input (1.2V threshold); internal 0.78MΩ pull-down ensures safe disable at startup; supports power sequencing with external controllers.
6 - OUT	Regulated output rail	Delivers 1.8V to load; integrates output voltage sensing and discharge FET (250Ω) that actively drains C_OUT when EN = low.

Key Features

Feature	Design Value
Constant-On-Time (COT) Control	Enables <10μs load transient response and eliminates need for external compensation components-reducing BOM count and layout complexity.
VSEL-Selectable PFM/PWM Mode	Dynamic switching between 20μA PFM (for battery life) and fixed-frequency PWM (for ripple-sensitive analog circuits) without firmware or external logic.
Integrated Output Discharge	250Ω internal FET discharges output capacitor on disable, preventing back-powering of upstream circuitry and ensuring clean power-down sequencing.
Hiccup-Mode Short-Circuit Protection	Enters safe, low-duty-cycle restart cycle upon sustained overload-protecting MOSFETs and inductor while allowing automatic recovery when fault clears.
100% Duty Cycle Capability	Maintains regulation down to V_IN ≈ V_OUT, enabling seamless operation during brown-out conditions common in battery-powered systems.

Applications

DDR Memory Power

Portable Audio Codec

Use Scenario: Supplies 1.8V I/O voltage to LPDDR2/LPDDR3 memory interfaces in handheld medical monitors and wearables.

IC Role / Device Role / Timing Role: Primary point-of-load regulator with fast load-step response to handle burst read/write currents up to 1.2A.

Use Value: COT control delivers <50mV output deviation during 1A/μs transients, preserving signal integrity on high-speed memory buses.

Use Scenario: Powers analog front-end and digital core of stereo audio codecs in Bluetooth headsets and voice-controlled remotes.

IC Role / Device Role / Timing Role: Low-noise, low-ripple 1.8V source for ADC/DAC reference and digital logic, synchronized to system clock domain.

Use Value: PWM mode reduces output ripple to <10mV_pp, preventing audible noise coupling into sensitive audio paths.

Battery-Powered Instrumentation

Low-Power Sensor Hub

Use Scenario: Powers microcontroller, display driver, and precision ADC in handheld multimeters and environmental sensors.

IC Role / Device Role / Timing Role: Main system regulator operating in PFM mode during measurement standby to extend 2×AA battery life beyond 12 months.

Use Value: 20μA quiescent current minimizes no-load drain, while 100% duty cycle maintains regulation as battery drops from 3.2V to 2.4V.

Use Scenario: Supplies 1.8V to MEMS accelerometers, temperature sensors, and BLE SoC in asset-tracking tags and predictive maintenance nodes.

IC Role / Device Role / Timing Role: Always-on power stage supporting intermittent wake-up bursts (10ms every 5s) with rapid start-up from deep sleep.

Use Value: 400μs soft-start prevents inrush current spikes that could trigger brown-out resets in energy-harvesting or coin-cell designs.

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
TI TPS62130ARGTR	Fixed 1.8V output; 3A rating; 2.7–6V input; 17μA I_Q; 2.5MHz f_SW; WSON-10 (2mm × 2mm) package.	Larger package and higher current capability suit higher-power applications but require more board area and cost.	Select when >1.5A margin or WSON thermal performance is required; not drop-in due to different pinout and enable polarity.
Analog Devices ADP2301AUJZ-1.8-R7	Fixed 1.8V; 1.2A max; 3–20V input; 40μA I_Q; 700kHz f_SW; TSOT-23-6 package.	Lower current and much lower switching frequency necessitate larger inductors/capacitors-unsuitable for ultra-compact layouts.	Choose only if wide-input (up to 20V) is mandatory and size/efficiency trade-offs are acceptable; incompatible with 2.3V start-up.

Compared with TPS62130ARGTR and ADP2301AUJZ-1.8-R7, the MP2141QGTF-18-P uniquely balances ultra-small SOT563 size, 2.3V minimum input, 20μA PFM I_Q, and 1.5A capability-making it optimal for space- and battery-limited portable electronics where alternatives compromise on at least two of these parameters.

Availability

MP2141QGTF-18-P is available at Aetrix Electronics and suitable for DDR memory power, portable audio codec supplies, battery-powered instrumentation, and low-power sensor hub designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MP2141QGTF-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 qualified to AEC-Q200 and ISO 9001 standards.

The MP2141Q series belongs to MPS's automotive-grade power management portfolio, engineered specifically for low-voltage, high-efficiency point-of-load conversion in safety-critical and space-constrained portable electronics-not general-purpose buck regulators.

FAQ

What is the recommended input capacitor for MP2141QGTF-18-P?

A 10μF X5R/X7R ceramic capacitor placed within 2mm of the VIN and GND pins is recommended per the datasheet. For improved ripple suppression under dynamic loads, a parallel 0.1μF ceramic capacitor is advised. Total RMS current rating must exceed 0.75A based on worst-case input ripple calculations at VIN = 3.6V.

Does MP2141QGTF-18-P support forced PWM mode?

No-it supports only two modes: PFM (VSEL < 0.4V or floating) and PWM (VSEL > 1.2V). There is no forced continuous conduction mode (CCM) override; PWM mode disables sleep mode, AAM, and ZCD, but does not guarantee fixed frequency under all load conditions due to COT architecture dependencies.

Can MP2141QGTF-18-P operate with an input voltage below 2.3V?

No. The absolute minimum operating input voltage is 2.3V per the Recommended Operating Conditions table. Below this, UVLO (2.25V rising threshold) prevents startup, and regulation cannot be guaranteed-even though absolute maximum ratings list 2V as the UVLO hysteresis floor.

What is the purpose of the VSEL pin's 1MΩ internal pull-down resistor?

The 1MΩ pull-down ensures the device defaults to PFM mode at power-up when VSEL is left unconnected, maximizing light-load efficiency without requiring external biasing. This simplifies design for applications where dynamic mode switching is unnecessary.

How does the output discharge function behave during EN deactivation?

When EN is pulled low, the internal 250Ω discharge FET activates automatically between OUT and GND, discharging the output capacitor within milliseconds. This prevents back-powering of upstream circuitry and ensures defined power-down states-critical for multi-rail sequencing in portable systems.

Is MP2141QGTF-18-P qualified for automotive applications?

Yes-the "Q" suffix denotes AEC-Q100 Grade 1 qualification (-40°C to +125°C junction temperature), and the device meets automotive reliability and stress-test requirements. However, system-level automotive compliance depends on full PCB layout, thermal design, and functional safety integration.

What inductor value is optimal for 1.5A operation at 3.6V input?

A 0.47μH shielded metal-alloy inductor (e.g., TDK VLS252010HBX-R47M, DCR ≤ 29mΩ) is validated in the datasheet for 1.5A operation at 3.6V input. This value balances efficiency (>90% at 1A), transient response, and physical size-while staying within peak inductor current limits.

MP2141QGTF-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:: -

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-P FAQ

1.How can I place an order for MP2141QGTF-18-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP2141QGTF-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 MP2141QGTF-18-P reliable?

The price and inventory of MP2141QGTF-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 MP2141QGTF-18-P is usually 5 days.

3.What payment methods are accepted for MP2141QGTF-18-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2141QGTF-18-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP2141QGTF-18-P?

MP2141QGTF-18-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP2141QGTF-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 MP2141QGTF-18-P?

For technical support, including MP2141QGTF-18-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2141QGTF-18-P requirements.

6.How does Aetrix verify that MP2141QGTF-18-P is sourced from the original manufacturer or authorized distributors?

All MP2141QGTF-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 MP2141QGTF-18-P meets industry standards.

7.What is the process for return or replacement of MP2141QGTF-18-P?

All MP2141QGTF-18-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2141QGTF-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 MP2141QGTF-18-P part is unused and in its original packaging.

Return procedure for MP2141QGTF-18-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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