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

Monolithic Power Systems Inc. MP2328GTL-Z

Name: MP2328GTL-Z
Brand: Monolithic Power Systems Inc.
SKU: MP2328GTL-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP2328GTL-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-583

Datasheet:: MP2328GTL-Z.pdf

Description:: IC REG BUCK ADJ 2A SOT583

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Product details

Overview

MP2328GTL-Z from Monolithic Power Systems is a fully integrated, synchronous step-down DC/DC converter with internal 130mΩ high-side and 60mΩ low-side MOSFETs, delivering up to 2A continuous output current across a 4.5V–28V input range and 0.5V–16V adjustable output. It employs constant-on-time (COT) control for fast transient response and operates at 450kHz nominal switching frequency in an SOT583 package. Used in flat-panel displays and multi-function printers for compact, high-efficiency local regulation.

For engineers reviewing the MP2328GTL-Z datasheet, MP2328GTL-Z pinout, MP2328GTL-Z application, or MP2328GTL-Z equivalent, key selection criteria include its 160µA quiescent current, ±1.5% reference accuracy over temperature, power-good indication, hiccup-mode over-current protection, and t_ON extension for improved dropout performance under high duty-cycle conditions.

Technical Context

The MP2328GTL-Z implements a COT control architecture that dynamically adjusts on-time based on input and output voltage to maintain stable 450kHz operation across wide VIN/VOUT combinations. Its integrated dual-NMOS power stage eliminates external gate drivers and enables >92% efficiency at 24V→5V/2A.

Internal functional blocks include a bootstrap-regulated floating driver for the high-side switch, valley-current sensing for OCP, open-drain PG with 84–112% V_REF window detection, and a 7.5µA SS current source enabling monotonic pre-biased start-up. Thermal shutdown triggers at 150°C with 20°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 28V - supports industrial 24V rails and automotive cold-crank margins without external pre-regulation.
Output Current	2A continuous - sustains full load across -40°C to +125°C junction temperature with proper PCB thermal design.
Switching Frequency	450kHz typical - enables use of small 10μH inductors and reduces EMI filter size while maintaining CCM down to ~300mA.
R_DS(ON)	130mΩ / 60mΩ - minimizes conduction loss in both high- and low-side switches, critical for >92% peak efficiency at 24V→5V.
Reference Accuracy	±1.5% over -40°C to +125°C - ensures tight output regulation across temperature without external trimming.
Quiescent Current	160µA - enables low standby power in always-on systems such as smart display controllers.
PG Threshold Window	84–112% of V_REF - provides robust power-good assertion/deassertion with margin against noise-induced false triggering.

Pinout & Package

MP2328GTL-Z is housed in a thermally enhanced 8-pin SOT583 package (2.0mm × 2.0mm × 0.55mm), featuring exposed pad for improved thermal dissipation and optimized pin spacing for high-density layout.

Pin/Terminal	Circuit Role	Design Meaning
1 - PG	Open-drain power-good indicator	Pulls low during startup, fault, or disable; requires external pull-up to V_OUT for reliable de-assertion when input fails.
2 - VIN	Main input supply rail	Accepts 4.5V–28V; must be decoupled with ≥10μF ceramic near pin; wide trace required for 2A peak currents.
3 - SW	Switch node	Connects to inductor; carries high di/dt; requires short, low-inductance routing and ground plane clearance.
4 - GND	Power and signal reference ground	Primary thermal path; must be connected via multiple vias to inner-layer ground plane for thermal and EMI control.
5 - BST	Bootstrap capacitor connection	Forms floating supply for high-side driver; requires 0.1μF X7R ceramic between BST and SW pins.
6 - EN	Enable control input	Digital logic input (1.2V threshold); max 6V rating; internal 1MΩ pull-down enables automatic start-up with resistor divider.
7 - SS	Soft-start timing node	Charged by 7.5µA internal current source; 22nF sets ~1.5ms ramp time; supports monotonic pre-biased start-up.
8 - FB	Feedback voltage sense	Compares output divider voltage to 500mV reference; 10kΩ+90.9kΩ sets 5V output; 5–50µA divider current balances noise vs. quiescent loss.

Key Features

Feature	Design Value
Constant-on-time (COT) control	Enables <10µs load transient recovery without external compensation components, simplifying loop design for varying output capacitance.
t_ON extension	Extends high-side on-time beyond 92% duty cycle to maintain regulation in dropout conditions, reducing minimum input requirement at high V_OUT.
Hiccup-mode over-current protection	Enters periodic restart cycle upon sustained overload, limiting average power dissipation and preventing thermal runaway during short-circuit events.
Pre-biased soft-start	Allows safe startup into powered outputs (e.g., hot-swap systems) by refreshing BST voltage and synchronizing SS ramp with existing V_OUT.
Power-good (PG) with dual-threshold detection	Asserts only when V_OUT is within 84–112% of V_REF post-soft-start, eliminating false positives during line transients or light-load droop.

Applications

Flat Panel Displays

Multi-Function Printers

Use Scenario: Local 5V/2A rail generation from 12V or 24V main supply for LCD bias, TCON, and interface ICs in monitors and TVs.

IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise VDD for timing-critical display controllers.

Use Value: 450kHz switching enables compact 10μH inductor placement near panel edge; PG signal sequences backlight enable after stable VDD.

Use Scenario: Powering motor drivers, sensors, and communication interfaces in compact office MFPs with constrained board area.

IC Role / Device Role / Timing Role: Secondary point-of-load regulator delivering clean 3.3V or 5V from intermediate 12V bus.

Use Value: 160µA quiescent current extends sleep-mode battery life; hiccup OCP prevents latch-up during paper-jam motor stalls.

Power Meters

Game Consoles

Use Scenario: Isolated auxiliary supply for metrology ASICs and RF modules in smart electricity meters operating across wide ambient temperatures.

IC Role / Device Role / Timing Role: High-reliability buck converter supporting long-life field deployment with ±1.5% reference stability from -40°C to +125°C.

Use Value: SOT583 package offers superior thermal resistance (θ_JA = 55°C/W) on 2-layer boards; thermal shutdown protects against enclosure overheating.

Use Scenario: Core voltage regulation for FPGA-based video processing units in portable gaming devices requiring dynamic load response.

IC Role / Device Role / Timing Role: Fast-transient buck converter supplying 1.8V/2A to programmable logic with minimal output capacitance.

Use Value: COT control achieves <50mV undershoot during 0→2A load steps; SS pin enables synchronized power sequencing with SoC reset.

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
RT6220BGS	4.5V–24V input, 2A, 500kHz, but uses voltage-mode PWM (not COT); lacks PG and t_ON extension.	No built-in power-good signaling; less suitable for systems requiring strict power sequencing or high-duty-cycle operation.	Choose RT6220BGS only if fixed-frequency PWM is preferred and PG/t_ON features are unnecessary.
TPS54202DRCT	4.5V–28V input, 2A, 450kHz, adaptive COT, but larger 10-pin WSON package; higher 220µA IQ.	Requires more PCB area; higher quiescent current reduces battery runtime in always-on subsystems.	Prefer TPS54202DRCT when integrated current sensing or higher thermal margin (θ_JA = 42°C/W) justifies larger footprint.

Compared with RT6220BGS and TPS54202DRCT, MP2328GTL-Z uniquely combines COT control, PG output, t_ON extension, and ultra-compact SOT583 packaging-making it optimal for space-constrained, high-transient applications where power sequencing and dropout resilience are critical.

Availability

MP2328GTL-Z is available at Aetrix Electronics and suitable for flat panel displays, multi-function printers, power meters, and game consoles requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP2328GTL-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 core expertise in DC/DC conversion, LED drivers, and motor control.

The MP2328 belongs to MPS's high-efficiency synchronous buck converter product line, designed specifically for space-constrained consumer and industrial applications demanding low quiescent current, fast transient response, and robust protection features.

FAQ

What is the recommended bootstrap capacitor value and dielectric type for MP2328GTL-Z?

A 0.1µF X7R ceramic capacitor is specified between BST and SW pins. X7R ensures stable capacitance across temperature and voltage, critical for reliable high-side gate drive. Avoid Y5V or Z5U due to excessive capacitance drift, which can cause driver instability or shoot-through.

Can MP2328GTL-Z start up into a pre-biased output voltage?

Yes. The MP2328GTL-Z supports monotonic pre-biased start-up: its internal BST refresh circuit and SS capacitor charging mechanism prevent reverse current flow and ensure controlled V_OUT ramp even when the output is initially held at 3.3V or 5V by another source.

How does the power-good (PG) pin behave during thermal shutdown?

During thermal shutdown, the PG pin is actively pulled low within 20µs of junction temperature exceeding 150°C. This provides immediate system-level fault indication, allowing host controllers to initiate graceful shutdown or thermal throttling before device damage occurs.

What is the minimum output voltage achievable with MP2328GTL-Z using the internal reference?

The minimum regulated output is 0.5V, set by the 500mV internal reference and external feedback divider. Lower voltages are not supported - attempting sub-0.5V operation causes the error amplifier to saturate and lose regulation capability.

Does MP2328GTL-Z require external compensation components?

No. The constant-on-time (COT) control architecture eliminates the need for external compensation networks. Loop stability is inherent and independent of output capacitance ESR, simplifying design for varied ceramic capacitor selections across different output voltages.

What is the maximum allowable voltage on the EN pin?

The EN pin must not exceed 6V under any condition. Exceeding this rating risks permanent damage to the internal level-shifter. When pulling EN from VIN >6V, use a resistive divider with values selected to limit EN voltage to ≤6V while maintaining sufficient hysteresis margin above the 1.2V turn-on threshold.

How does hiccup-mode over-current protection recover after a fault?

Upon OCP detection, MP2328GTL-Z disables switching, discharges the SS capacitor, waits ~10ms, then re-attempts soft-start. If the fault persists, it repeats this cycle. Recovery is automatic once the overload is removed and V_FB rises above the UV threshold (40–60% of V_REF).

MP2328GTL-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: MP

Package/Case:: SOT-583

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):: 4.5V

Voltage - Input (Max):: 28V

Voltage - Output (Min/Fixed):: 0.5V

Voltage - Output (Max):: 16V

Current - Output:: 2A

Frequency - Switching:: 450kHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-583

MP2328GTL-Z FAQ

1.How can I place an order for MP2328GTL-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP2328GTL-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 MP2328GTL-Z reliable?

The price and inventory of MP2328GTL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2328GTL-Z is usually 5 days.

3.What payment methods are accepted for MP2328GTL-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2328GTL-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP2328GTL-Z?

MP2328GTL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP2328GTL-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 MP2328GTL-Z?

For technical support, including MP2328GTL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2328GTL-Z requirements.

6.How does Aetrix verify that MP2328GTL-Z is sourced from the original manufacturer or authorized distributors?

All MP2328GTL-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 MP2328GTL-Z meets industry standards.

7.What is the process for return or replacement of MP2328GTL-Z?

All MP2328GTL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2328GTL-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 MP2328GTL-Z part is unused and in its original packaging.

Return procedure for MP2328GTL-Z:

1.Submit a request within 90 days.

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

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