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

Monolithic Power Systems Inc. MP2143HGD-Z

Name: MP2143HGD-Z
Brand: Monolithic Power Systems Inc.
SKU: MP2143HGD-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP2143HGD-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 10-VFDFN

Datasheet:: MP2143HGD-Z.pdf

Description:: IC REG BUCK ADJ 3A 10QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP2143HGD-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 80mΩ high-side and 40mΩ low-side MOSFETs, delivering up to 3A continuous output current from a 2.5V–5.5V input, regulating output as low as 0.6V, and operating at a default 2.0MHz switching frequency for compact filter design in portable power rails.

For engineers reviewing the MP2143HGD-Z datasheet, MP2143HGD-Z pinout, MP2143HGD-Z application, or MP2143HGD-Z equivalent, key selection criteria include constant-on-time control for fast transient response, EN/PG pins for power sequencing, hiccup-mode short-circuit protection, thermal shutdown at 170°C, and QFN-10 (2mm×3mm) package compatibility with low-ESR ceramic output capacitors.

Technical Context

The MP2143HGD-Z employs constant-on-time (COT) control with input-voltage feed-forward to maintain stable 1.8–3.0MHz switching across input (2.5–5.5V) and output (0.6–VIN−0.5V) ranges, eliminating loop compensation components. Its internal PFET/NFET pair enables 100% duty-cycle operation in dropout.

It integrates cycle-by-cycle current limiting (4.8A HS-FET limit), thermal shutdown (170°C trip, 30°C hysteresis), auto-discharge during shutdown, and an open-drain PG pin with 500kΩ internal pull-up and ±10% regulation window referenced to 0.6V FB voltage.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 5.5V - supports single-cell Li-ion, USB, and 3.3V/5V rail inputs without external regulators.
Output Voltage Range	0.6V to VIN−0.5V - enables core voltage regulation for modern DSPs, FPGAs, and low-V_DD I/O.
Max Output Current	3A continuous - sustains full load under worst-case thermal conditions (θ_JA = 65°C/W, T_A = 25°C).
Switching Frequency	2.0MHz typical (1.8–3.0MHz over temp) - allows use of sub-1μH inductors and <22μF ceramic output caps.
Feedback Voltage	600mV ±12mV - sets precise output via external resistor divider; enables 1.2V output with 200kΩ/200kΩ ratio.
Power-Good Threshold	±10% around 0.6V FB - provides reliable rail monitoring with 110μs delay and open-drain logic-level output.
Enable Logic Threshold	EN high ≥1.2V, low ≤0.4V - compatible with standard CMOS/LVTTL logic; includes 1MΩ internal pulldown.
Thermal Shutdown	170°C junction trip with 30°C hysteresis - protects die during sustained overload or poor PCB heatsinking.

Pinout & Package

MP2143HGD-Z is housed in a thermally enhanced QFN-10 package (2mm × 3mm, 0.5mm pitch) with exposed thermal pad (PGND-connected) for efficient heat dissipation in space-constrained designs.

Pin/Terminal	Circuit Role	Design Meaning
1 - EN	Enable control input	Active-high logic input; internal 1MΩ pulldown ensures safe disable when floating or grounded.
2 - FB	Feedback sensing node	Connects to resistor divider midpoint; regulates output by comparing to 0.6V reference.
3 - AGND	Analog ground reference	Separate ground for control circuitry; must be tied to PGND at single point near IC for noise immunity.
4 - OUT	Output voltage sense	Direct connection to regulated output rail; improves load regulation accuracy vs. remote sensing.
5 - NC	No-connect terminal	Not internally bonded; may be left floating or connected to PGND solely for thermal enhancement.
6,7 - PGND	Power ground return	High-current return path for SW and VIN; requires low-inductance connection to thermal pad and input/output caps.
8 - SW	Switch node	Drives external inductor; carries high di/dt; must be routed short and away from sensitive analog traces.
9 - VIN	Main power input	Accepts 2.5–5.5V unregulated supply; requires local 10–47μF low-ESR ceramic bypass capacitor.
10 - PG	Power-good indicator	Open-drain output pulled up to VIN via 500kΩ resistor; asserts high when FB is within ±10% of 0.6V.

Key Features

Feature	Design Value
Constant-on-time (COT) control	Enables instantaneous load transient response without external compensation components or phase-margin tuning.
Integrated 80mΩ/40mΩ MOSFETs	Eliminates external power switches and reduces BOM count; achieves >90% efficiency at 3A/1.2V out from 3.3V in.
Hiccup-mode short-circuit protection	Prevents thermal runaway during sustained fault by cycling enable/disable until fault clears - no latch-off or manual reset required.
100% duty-cycle capability	Maintains regulation down to V_OUT ≈ V_IN − 0.1V, enabling seamless operation during input brownout or battery discharge.
Soft-start/soft-stop	1.3ms controlled ramp-up avoids inrush current; linear discharge on disable prevents reverse current into load.
Stable with ceramic output caps	Designed for low-ESR ceramics (X5R/X7R); eliminates need for electrolytic/tantalum caps and associated reliability concerns.

Applications

Low-Voltage FPGA Core Supply

Battery-Powered IoT Sensor Node

Use Scenario: Powers 1.0V–1.2V FPGA core logic requiring tight voltage tolerance and fast dynamic response to burst-mode processing loads.

IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated core voltage; COT architecture ensures <5% output deviation during 2A step-load transients.

Use Value: Enables reliable FPGA configuration and real-time computation without external loop compensation or large bulk capacitance.

Use Scenario: Supplies 1.8V or 2.5V rail to ultra-low-power microcontroller and RF transceiver in coin-cell or LiPo-powered edge devices.

IC Role / Device Role / Timing Role: Main system PMIC providing high-efficiency conversion from 3.0–3.6V battery range; 2.0MHz switching minimizes inductor size (<1.0mm height).

Use Value: Extends battery life via >92% peak efficiency and <0.1μA shutdown current; EN/PG support coordinated sleep/wake sequencing.

Portable Instrument Analog Front-End

Wireless Network Card I/O Rail

Use Scenario: Generates clean 3.3V analog supply for precision ADCs, op-amps, and sensor signal conditioning in handheld test equipment.

IC Role / Device Role / Timing Role: Low-noise power source with soft-start and PG monitoring; OUT pin enables accurate remote sensing to reject PCB trace IR drop.

Use Value: Maintains <10mVpp output ripple using 22μF X7R ceramic cap; PG signal validates rail stability before ADC calibration sequence begins.

Use Scenario: Provides 1.2V or 1.8V I/O supply for PCIe-based wireless cards operating from 3.3V motherboard rail in compact embedded systems.

IC Role / Device Role / Timing Role: Compact, high-density buck converter supporting hot-plug detection and power sequencing via EN/PG handshake with host controller.

Use Value: QFN-10 footprint fits tight card-edge layouts; hiccup-mode SCP prevents bus fault propagation during connector mating transients.

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
TPS62130ARGTR	Fixed 3.0MHz frequency; 3.5A rating; 0.6V FB; no OUT pin; different EN threshold (1.18V min)	Lacks remote output sensing and hiccup-mode SCP; uses voltage-mode PWM instead of COT	Preferred where fixed-frequency EMI control is critical and remote sensing is unnecessary.
RTQ2132BGQW	2.5A rating; 0.6V FB; 2.0MHz; integrated soft-start; no PG pin; different thermal shutdown (150°C)	Missing power-good signaling and 100% duty-cycle capability; lower current limit (3.2A)	Selected when cost-sensitive designs tolerate reduced fault coverage and sequencing capability.

Compared with TPS62130ARGTR and RTQ2132BGQW, the MP2143HGD-Z uniquely combines COT control for zero-compensation design, OUT-sense for precision regulation, hiccup-mode SCP for robust field operation, and PG/EN for deterministic power sequencing - making it optimal for portable, battery-critical, and FPGA-centric systems.

Availability

MP2143HGD-Z is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered IoT nodes, and FPGA power management requiring stable component supply, consistent QFN-10 packaging, and long-term industrial lifecycle support.

Supply support for MP2143HGD-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 across Asia and North America and global manufacturing partnerships.

The MP2143H belongs to MPS's high-frequency synchronous buck converter product line, engineered specifically for space-constrained, battery-operated, and FPGA/DSP power applications demanding minimal external components and fast transient response.

FAQ

What is the minimum recommended output capacitor value for stable operation?

The MP2143HGD-Z is optimized for ceramic output capacitors; a minimum of 22μF X7R/X5R (1206 or larger) is recommended for 1.2V output at 3A load. Lower values (e.g., 10μF) may cause instability or excessive ripple above 20mVpp due to insufficient energy storage and ESR interaction with COT control dynamics.

Does the MP2143HGD-Z require external compensation components?

No - the constant-on-time control architecture eliminates the need for external compensation networks. Stability is inherently achieved through input-voltage feed-forward and fixed timing parameters; only the FB resistor divider, input/output capacitors, and inductor are required for full functionality.

How does the PG pin behave during startup and fault conditions?

The PG pin remains low until the FB voltage reaches and sustains 0.54V–0.66V (±10% of 0.6V) for ≥110μs. During overcurrent or thermal shutdown, PG pulls low within microseconds. It reasserts high only after regulation is fully restored and maintained for the full delay window - ensuring reliable power sequencing handshaking.

Can the MP2143HGD-Z operate with a 2.5V input and 2.4V output?

Yes - its 100% duty-cycle capability allows continuous regulation when V_OUT ≥ V_IN − 0.1V. At 2.5V input and 2.4V output, the device operates in dropout mode with minimal conduction loss, maintaining regulation without oscillation or dropout recovery delay.

What is the maximum allowable RMS current for the input capacitor?

The input capacitor must handle ≥1.5A RMS current when delivering 3A load at VIN = 3.3V and VOUT = 1.2V. A 10μF X7R ceramic capacitor rated for ≥2.0A RMS (e.g., 1206 case, 25V rating) meets this requirement while minimizing voltage ripple below 30mVpp under full load.

Is the NC pin (Pin 5) required to be connected to PGND?

No - Pin 5 is not internally bonded and has no electrical function. It may be left floating or connected to PGND solely to improve thermal performance; no electrical connection is necessary for functional operation or reliability.

How does the soft-stop feature prevent reverse current flow?

Upon EN deactivation, the MP2143HGD-Z disables both MOSFETs and actively discharges the internal reference voltage, causing the output to decay linearly. This controlled ramp-down prevents the inductor from forcing current backward through the low-side FET body diode - eliminating reverse current and protecting downstream loads.

MP2143HGD-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 10-VFDFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 2.5V

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 0.6V

Voltage - Output (Max):: 5V

Current - Output:: 3A

Frequency - Switching:: 1.8MHz ~ 3MHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-QFN (3x2)

MP2143HGD-Z FAQ

1.How can I place an order for MP2143HGD-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP2143HGD-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 MP2143HGD-Z reliable?

The price and inventory of MP2143HGD-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2143HGD-Z is usually 5 days.

3.What payment methods are accepted for MP2143HGD-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2143HGD-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP2143HGD-Z?

MP2143HGD-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP2143HGD-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 MP2143HGD-Z?

For technical support, including MP2143HGD-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2143HGD-Z requirements.

6.How does Aetrix verify that MP2143HGD-Z is sourced from the original manufacturer or authorized distributors?

All MP2143HGD-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 MP2143HGD-Z meets industry standards.

7.What is the process for return or replacement of MP2143HGD-Z?

All MP2143HGD-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2143HGD-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 MP2143HGD-Z part is unused and in its original packaging.

Return procedure for MP2143HGD-Z:

1.Submit a request within 90 days.

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

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