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

Monolithic Power Systems Inc. MP2182GTL-Z

Name: MP2182GTL-Z
Brand: Monolithic Power Systems Inc.
SKU: MP2182GTL-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP2182GTL-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-583

Datasheet:: MP2182GTL-Z.pdf

Description:: IC REG BUCK ADJ 2A SOT583

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Product details

Overview

MP2182GTL-Z from Monolithic Power Systems is a monolithic synchronous step-down DC/DC converter with integrated 80mΩ high-side P-channel and 40mΩ low-side N-channel MOSFETs, delivering up to 2A continuous output current from a 2.5V–5.5V input while regulating output down to 0.6V. It employs constant-on-time (COT) control for fast transient response and includes power good (PG), external soft-start (SS), and hiccup-mode short-circuit protection - deployed in portable instrumentation and battery-powered I/O rail generation.

For engineers reviewing the MP2182GTL-Z datasheet, MP2182GTL-Z pinout, MP2182GTL-Z application, or MP2182GTL-Z equivalent, key selection criteria include its 1.2MHz switching frequency, 21μA quiescent current, 1% FB voltage accuracy, 80/40mΩ internal MOSFET R_DS(ON), and SOT583 package footprint compatibility with space-constrained mobile power designs.

Technical Context

The MP2182GTL-Z uses input-voltage feed-forward COT control to maintain stable 1.2MHz switching across its 2.5V–5.5V input range while enabling sub-100ns minimum on/off times. Its AAM (Advanced Asynchronous Modulation) + ZCD (Zero-Current Detection) architecture forces DCM operation at light load, reducing quiescent current to 21μA without compromising regulation.

Fault management integrates cycle-by-cycle current limiting (3.5A peak HS, 2A valley LS), VO OVP (115% V_FB threshold with 10% hysteresis), thermal shutdown at 160°C, and automatic output discharge during disable - all coordinated via a single internal bias rail and sleep-mode logic that scales gate drive and comparator currents under light load.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 5.5V - supports single-cell Li-ion, USB, and regulated 3.3V/5V rails without pre-regulation.
Output Current	2A continuous - sufficient for powering DSP cores, RF transceivers, or multi-rail FPGA I/O banks.
Switching Frequency	1.2MHz - enables use of compact 1μH shielded inductors and reduces EMI filter size.
Feedback Accuracy	±1% at 25°C - ensures tight output regulation critical for low-voltage logic (e.g., 1.2V core, 1.8V I/O).
Quiescent Current	21μA - extends battery life in always-on sensor nodes and standby power domains.
MOSFET R_DS(ON)	80mΩ (HS) / 40mΩ (LS) - minimizes conduction loss at 2A, supporting >90% efficiency at mid-load.
Power Good Threshold	90% V_FB rising / 85% V_FB falling - provides clean, hysteresis-stabilized sequencing signal for downstream logic enable.

Pinout & Package

The MP2182GTL-Z is housed in an ultra-small 1.6mm × 2.1mm SOT583 package with 0.4mm pitch and exposed thermal pad (pin 4 GND). Its 8-pin configuration supports full converter control with minimal external components.

Pin/Terminal	Circuit Role	Design Meaning
1 PG	Open-drain power good indicator	Signals valid regulation (V_FB ≥90%) to system sequencer; requires external 100kΩ–500kΩ pull-up.
2 VIN	Main input supply	Accepts 2.5V–5.5V unregulated input; decoupling capacitor must be placed adjacent to minimize high-frequency noise coupling.
3 SW	Switch node	Drain of internal high-side P-MOSFET; connects directly to inductor; high dv/dt node requiring tight layout.
4 GND	Power and signal ground	Common reference for all circuits; thermal pad ties to PCB ground plane for thermal dissipation.
5 EN	Enable control	Active-high logic input (1.2V threshold); internal 2MΩ pulldown allows floating-disable; controls startup sequencing.
6 SS	Soft-start timing	Connects to external capacitor (e.g., 2.2nF) to set controlled V_OUT ramp rate and prevent inrush current.
7 OUT	Output power rail & sense return	Delivers regulated output; also serves as current-sense return path for internal discharge FET during shutdown.
8 FB	Feedback voltage sense	Monitors resistor divider output; 600mV reference enables adjustable V_OUT from 0.6V using standard 1% resistors.

Key Features

Feature	Design Value
Constant-On-Time (COT) Control	Enables <10μs load transient recovery without external compensation components - simplifies design for dynamic loads like wireless modems.
External Soft-Start (SS)	Capacitor-programmable startup slew rate prevents overshoot and inrush into large output capacitors (e.g., 22μF ceramic).
Output Discharge Function	Internal 150Ω discharge FET automatically bleeds V_OUT when EN = low - eliminates need for external bleed resistor in battery-sensitive systems.
Hiccup-Mode Short-Circuit Protection	Shuts down, discharges SS capacitor, then retries soft-start - protects against sustained shorts without thermal runaway or latch-up.
AAM + ZCD Light-Load Operation	Forces discontinuous conduction mode below ~200mA, reducing I_Q to 21μA while maintaining regulation accuracy and stability.

Applications

Wireless Networking Cards

Portable Instrumentation

Use Scenario: Powering 2.4GHz/5GHz Wi-Fi/BT SoCs and RF front-end modules in mini-PCIe or M.2 form-factor adapters.

IC Role / Device Role / Timing Role: Primary 1.2V/1.8V/3.3V buck regulator supplying processor core, memory I/O, and analog RF sections with tight ripple and fast transient response.

Use Value: 1.2MHz switching avoids interference with 2.4GHz ISM band; 2A capability supports burst transmit current peaks without droop.

Use Scenario: Generating precision analog and digital supply rails in handheld multimeters, gas detectors, and portable oscilloscopes.

IC Role / Device Role / Timing Role: Low-noise, low-I_Q point-of-load converter for ADC references, op-amp supplies, and microcontroller cores.

Use Value: 21μA quiescent current extends battery runtime in always-on measurement modes; ±1% FB accuracy ensures stable reference voltage.

Battery-Powered Medical Devices

Low-Voltage I/O System Power

Use Scenario: Supplying regulated rails to wearable ECG monitors, pulse oximeters, and insulin pumps operating from single Li-ion cells.

IC Role / Device Role / Timing Role: Main system power IC converting 3.0V–4.2V battery voltage to fixed 1.2V, 1.8V, and 3.3V outputs with PG sequencing.

Use Value: 2.5V minimum input enables full battery utilization down to 3.0V; output discharge prevents back-powering during battery swap.

Use Scenario: Providing clean, sequenced power to FPGA I/O banks, microSD interfaces, and USB PHYs in embedded edge controllers.

IC Role / Device Role / Timing Role: Dedicated buck converter per I/O voltage domain (e.g., 1.2V, 1.8V, 3.3V) with independent EN/PG for safe hot-plug operation.

Use Value: 100% duty cycle capability supports near-dropout operation (e.g., 3.6V→3.3V); PG signals enable firmware-controlled power-up order.

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
RT6220AGQW	Fixed 1.2V output; no external FB or SS; 3A rating; QFN-10 package	Lacks programmability and PG; suited for cost-sensitive, fixed-output consumer electronics	Select when output voltage is fixed and board area permits larger QFN; avoid if soft-start timing or power sequencing is required.
TPS62865ARGTR	1.8V–5.5V input; 4A output; 2.5MHz switching; I₂C programmable V_OUT and margins	Higher integration (I₂C, telemetry) but larger 2mm × 2mm WSON package and higher BOM cost	Choose for advanced power management in industrial PLCs where remote configuration and fault logging are needed.

Compared with RT6220AGQW and TPS62865ARGTR, the MP2182GTL-Z uniquely balances ultra-small SOT583 footprint, full external programmability (V_OUT, SS, PG), and ultra-low 21μA I_Q - making it optimal for space- and battery-constrained portable designs where flexibility and efficiency are co-prioritized.

Availability

MP2182GTL-Z is available at Aetrix Electronics and suitable for wireless networking cards, portable instrumentation, battery-powered medical devices, and low-voltage I/O system power requiring stable component supply across production lifecycles.

Supply support for MP2182GTL-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 power management ICs, with over two decades of innovation in DC/DC converters, LED drivers, and motor drivers.

The MP2182 belongs to MPS's ultra-compact, high-efficiency buck converter product line designed specifically for portable, battery-operated, and space-constrained applications demanding low quiescent current and minimal external components.

FAQ

What is the minimum input voltage required for MP2182GTL-Z to start switching?

The MP2182GTL-Z has an under-voltage lockout (UVLO) rising threshold of 2.45V typical. It begins switching only when VIN exceeds this level; hysteresis of 200mV ensures reliable turn-on without oscillation near the threshold. Below 2.3V, the device remains fully disabled with <1μA shutdown current.

Does MP2182GTL-Z support 100% duty cycle operation, and what is its practical use case?

Yes, the MP2182GTL-Z supports true 100% duty cycle operation, allowing V_OUT to approach V_IN - for example, generating 3.3V from a 3.6V input. This is essential in battery-powered systems nearing end-of-discharge, where maintaining regulation without dropout is critical for uninterrupted system operation.

How does the output discharge function work, and is an external resistor required?

When EN is pulled low, the MP2182GTL-Z activates an internal 150Ω NMOS discharge FET between OUT and GND, actively bleeding stored charge from the output capacitor. No external resistor is needed - this feature eliminates hold-up time and prevents back-powering of upstream circuitry during power-down sequences.

What is the recommended SS capacitor value for a 10ms soft-start time?

With a typical SS charging current of 3μA, a 2.2nF capacitor yields ~7.3ms soft-start time (t_SS ≈ C_SS × 0.6V / 3μA). For 10ms, use 3.3nF - verified by Figure 6 in the datasheet. Larger values increase ramp time linearly but may delay system wake-up in low-power applications.

Can MP2182GTL-Z operate with ceramic output capacitors only, and what is the minimum recommended value?

Yes, ceramic output capacitors are strongly recommended. The datasheet specifies 22μF for 1.2V/2A operation, but 10μF is acceptable for lower-current or less demanding loads. Use X5R/X7R dielectrics with low ESR; ensure total capacitance meets ripple and stability requirements per Equation (9) in the application note.

What thermal performance can be expected in a 2-layer PCB layout with the SOT583 package?

On a standard 2-layer EV2182-TL-00A evaluation board, θ_JA is 58°C/W. At 2A load with 3.6V input and 1.2V output, power dissipation is ~0.24W, resulting in ~14°C junction-to-ambient rise above ambient - well within the –40°C to +125°C operating range without forced airflow.

Is the PG pin compatible with 1.8V logic systems, and what pull-up voltage should be used?

Yes - the open-drain PG pin can be pulled up to any logic-compatible voltage (1.8V, 3.3V, or 5V) via a 100kΩ–500kΩ resistor. When active, PG sinks ≥1mA at ≤0.4V; when inactive, leakage is <100nA. For 1.8V systems, use 100kΩ pull-up to ensure clean logic-low detection while minimizing static current.

MP2182GTL-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: SOT-583

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: -

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):: 5.5V

Current - Output:: 2A

Frequency - Switching:: 1.2MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-583

MP2182GTL-Z FAQ

1.How can I place an order for MP2182GTL-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP2182GTL-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 MP2182GTL-Z reliable?

The price and inventory of MP2182GTL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2182GTL-Z is usually 5 days.

3.What payment methods are accepted for MP2182GTL-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2182GTL-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP2182GTL-Z?

MP2182GTL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP2182GTL-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 MP2182GTL-Z?

For technical support, including MP2182GTL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2182GTL-Z requirements.

6.How does Aetrix verify that MP2182GTL-Z is sourced from the original manufacturer or authorized distributors?

All MP2182GTL-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 MP2182GTL-Z meets industry standards.

7.What is the process for return or replacement of MP2182GTL-Z?

All MP2182GTL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2182GTL-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 MP2182GTL-Z part is unused and in its original packaging.

Return procedure for MP2182GTL-Z:

1.Submit a request within 90 days.

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

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