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

Monolithic Power Systems Inc. MP2331HGTL-Z

Name: MP2331HGTL-Z
Brand: Monolithic Power Systems Inc.
SKU: MP2331HGTL-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP2331HGTL-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-583

Datasheet:: MP2331HGTL-Z.pdf

Description:: IC REG BUCK ADJ 2A SOT583

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Product details

Overview

MP2331HGTL-Z from Monolithic Power Systems is a fully integrated, synchronous step-down DC/DC converter delivering 2A continuous output current with 4.2V–24V input range, 1.2MHz switching frequency, and constant-on-time (COT) control for fast transient response in space-constrained power rails for digital set-top boxes and flat-panel displays.

For engineers reviewing the MP2331HGTL-Z datasheet, MP2331HGTL-Z pinout, MP2331HGTL-Z application, or MP2331HGTL-Z equivalent, key selection considerations include its SOT583 package footprint, 110mΩ/45mΩ internal MOSFET R_DS(ON), programmable soft-start, power-good indication, and forced PWM operation under light load.

Technical Context

The MP2331HGTL-Z implements constant-on-time (COT) control with input- and output-voltage-dependent on-time generation to maintain stable ~1.2MHz switching across 4.2V–24V input while supporting pre-biased start-up and TON extension down to 280kHz for improved dropout performance.

Its integrated high-side (110mΩ) and low-side (45mΩ) N-channel MOSFETs operate in forced CCM with internal dead-time control to prevent shoot-through; the bootstrap circuit self-charges via SW node and regulates BST voltage to 3.3V with UVLO at 2.2V.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.2V to 24V - supports wide industrial and consumer input rails including 5V, 12V, 19V, and 24V systems without external LDO pre-regulation.
Output Current	2A continuous - delivers full rated current with thermal shutdown protection up to +125°C junction temperature.
Switching Frequency	1.2MHz typical - enables compact magnetics and low-profile ceramic output capacitors; adjustable via external components.
Internal MOSFET R_DS(ON)	110mΩ (HS) / 45mΩ (LS) - reduces conduction loss and improves efficiency at 2A, especially at mid-to-high load conditions.
Quiescent Current	200µA - minimizes standby power loss in always-on subsystems such as HDMI receivers or USB-C PD controllers.
Feedback Reference	805mV ±16mV - sets precise output voltage via external resistor divider; supports 0.8V–13V outputs with tight regulation over line/load/temperature.
Power Good Threshold	92%–120% of V_REF rising/falling - provides reliable system sequencing with open-drain PG output requiring external pull-up.

Pinout & Package

The MP2331HGTL-Z is housed in a thermally enhanced, space-saving SOT583 package (1.6mm × 2.1mm, 0.5mm pitch), optimized for high-density PCB layouts with exposed thermal pad connected to GND.

Pin/Terminal	Circuit Role	Design Meaning
1 - PG	Power Good open-drain output	Signals regulated output status; requires external pull-up; asserts low during UVLO, OCP, OTP, or EN deactivation.
2 - IN	Main input supply rail	Accepts 4.2V–24V; must be decoupled with ≥10µF ceramic capacitor placed adjacent to pin; wide trace recommended.
3 - SW	Switch node	Connects to inductor; carries high di/dt; requires short, low-inductance routing and direct connection to BST capacitor.
4 - GND	System ground reference	Primary return path for power and signal; must be tied to thermal pad and use multiple vias to inner ground plane.
5 - BST	Bootstrap supply for HS gate driver	Requires 1µF X7R ceramic capacitor between BST and SW; enables floating high-side drive above VIN.
6 - EN	Enable control input	Logic-high (>1.23V) enables regulator; internal 2.8V Zener clamp protects against overvoltage; pull-up to VIN recommended.
7 - SS	Soft-start timing node	Charged by internal 7.3µA current source; external capacitor sets ramp time; overrides V_REF during startup.
8 - FB	Feedback input	Monitors output via resistor divider; 805mV reference enables accurate V_OUT setting; high-impedance (10–80nA) minimizes divider loss.

Key Features

Feature	Design Value
Constant-On-Time (COT) Control	Delivers <10µs load transient recovery without external compensation; maintains stable frequency across input/output variations.
Programmable Soft-Start	External capacitor on SS pin sets monotonic output ramp time-prevents inrush into pre-biased loads and avoids system brownout.
Forced PWM Operation	Eliminates mode-hopping at light load; ensures consistent 1.2MHz switching for predictable EMI and output ripple behavior.
Integrated Protection Suite	Includes hiccup-mode OCP, thermal shutdown (150°C), input UVLO (4V), and PG fault signaling-reduces BOM count and improves system reliability.
SOT583 Thermal Performance	θ_JA = 55°C/W on 2-layer board-enables 2A operation without heatsink in ambient ≤60°C with proper copper area and vias.

Applications

Game Consoles

Digital Set-Top Boxes

Use Scenario: Powering SoC core voltage rails (e.g., 1.2V @ 2A) in portable gaming handhelds with battery+adapter input flexibility.

IC Role / Device Role / Timing Role: Primary buck regulator providing tightly regulated, low-noise core supply with fast transient response to CPU/GPU burst loads.

Use Value: COT control maintains <±1.5% output deviation during 0→2A 2.5A/µs load steps; PG signal synchronizes SoC boot sequence.

Use Scenario: Generating 3.3V/2A for HDMI PHY, tuner ICs, and memory interfaces in cable/satellite STBs operating from 12V wall adapters.

IC Role / Device Role / Timing Role: Main point-of-load converter with programmable soft-start to avoid inrush into partially powered downstream logic.

Use Value: 200µA quiescent current extends standby runtime; SOT583 footprint saves >30% board area vs. SOIC-8 alternatives.

Flat-Panel Television

Industrial HMIs

Use Scenario: Supplying 5V/2A to display timing controllers (TCON) and backlight drivers in 24V-powered LCD/LED TVs.

IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter stepping 24V down to 5V with minimal thermal rise in enclosed chassis.

Use Value: 110mΩ/45mΩ MOSFETs achieve >92% peak efficiency at 19V_IN/5V_OUT; thermal shutdown prevents latch-up during sustained 2A load.

Use Scenario: Providing 2.5V/2A to FPGA I/O banks and ADC reference supplies in fanless industrial HMIs with 12–24V DC input.

IC Role / Device Role / Timing Role: Robust, low-noise POL regulator with PG confirmation before enabling sensitive analog subsystems.

Use Value: Pre-bias start-up allows hot-swap capability; PG falling delay (35µs) ensures clean reset assertion during brownout.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2331GTL-Z	Same die, SOT563 package (1.6mm × 1.6mm); higher θ_JA (70°C/W); no BST pin exposed - requires external bootstrap circuit.	Limited to lower ambient temps or reduced load current; unsuitable for high-reliability 2A continuous designs without derating.	Select MP2331HGTL-Z when thermal performance, integrated BST, or layout simplicity is required.
TPS54202DRCT	TI part; 4.5–28V input; 2A; 450kHz–2.5MHz adjustable freq; current-mode control; different pinout and compensation requirements.	Requires external compensation network; lacks pre-bias start-up and TON extension; PG threshold less tightly specified.	Choose only if existing TI ecosystem integration or adjustable frequency outweighs COT advantages and SOT583 size benefit.

Compared with MP2331GTL-Z, the MP2331HGTL-Z offers superior thermal dissipation and integrated bootstrap, enabling full 2A operation in compact enclosures; versus TPS54202DRCT, it delivers faster transient response and simpler design with no loop compensation needed.

Availability

MP2331HGTL-Z is available at Aetrix Electronics and suitable for digital set-top boxes, flat-panel television power supplies, game console subsystems, and industrial HMI front-ends requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2331HGTL-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 a focus on integration, efficiency, and miniaturization for consumer, industrial, and automotive markets.

The MP2331H product line delivers highly integrated, pin-compatible synchronous buck converters targeting space-constrained, high-efficiency point-of-load applications where thermal performance and fast transient response are critical.

FAQ

What is the minimum output voltage supported by MP2331HGTL-Z?

The MP2331HGTL-Z supports output voltages as low as 0.8V, set by the internal 805mV feedback reference and external resistor divider. At V_OUT = 0.8V, the FB divider must be configured so that the voltage at FB equals 805mV when the output reaches regulation-verified per Equation (2) in the datasheet.

Does MP2331HGTL-Z support forced continuous conduction mode (FCCM) at all load levels?

Yes-the MP2331HGTL-Z operates exclusively in forced CCM, eliminating pulse-skipping and mode transitions. This ensures consistent 1.2MHz switching frequency, predictable EMI profile, and stable output ripple even at light loads, unlike hysteretic or auto-mode buck regulators.

How is the soft-start time calculated for MP2331HGTL-Z?

Soft-start time is determined by the external capacitor on the SS pin and the internal 7.3µA current source: T_SS(ms) = (C_SS(nF) × 2 × V_REF) / I_SS. For example, a 10nF capacitor yields ~2.2ms ramp time. The SS pin voltage ramps linearly until V_SS/2 exceeds V_REF, ending soft-start.

Can MP2331HGTL-Z start into a pre-biased output?

Yes-it features dedicated pre-bias start-up circuitry. When the FB node is pre-charged, the internal soft-start and bootstrap circuits coordinate to refresh BST voltage and initiate monotonic ramping without reverse current flow or output collapse, verified in Figure 9 of the datasheet.

What is the maximum recommended output capacitance for MP2331HGTL-Z?

The maximum safe output capacitance is limited by soft-start duration and average start-up current. Per Equation (12), C_{O_MAX} ≈ (I_{LIM_AVG} − I_OUT) × T_SS / V_OUT. With typical 7.3µA SS current and 2A load, exceeding ~470µF risks failure to reach regulation before soft-start ends-use 220µF or less for robustness.

Is an external bootstrap diode required for MP2331HGTL-Z?

No-the MP2331HGTL-Z integrates a bootstrap charging circuit that self-generates the floating supply for the high-side gate driver using the SW node and internal regulation. Only a 1µF ceramic capacitor between BST and SW is required; no external diode or charge pump is needed.

What PCB layout practices are critical for MP2331HGTL-Z stability?

Three practices are essential: (1) Place input capacitor (≥10µF X7R) within 3mm of IN and GND pins using wide, short traces; (2) Connect GND pin and thermal pad to solid inner ground plane with ≥4 thermal vias; (3) Route SW node directly to inductor with minimal loop area-avoid routing under IC or near sensitive analog traces.

MP2331HGTL-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):: 4.2V

Voltage - Input (Max):: 24V

Voltage - Output (Min/Fixed):: 0.8V

Voltage - Output (Max):: 13V

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

MP2331HGTL-Z FAQ

1.How can I place an order for MP2331HGTL-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP2331HGTL-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 MP2331HGTL-Z reliable?

The price and inventory of MP2331HGTL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2331HGTL-Z is usually 5 days.

3.What payment methods are accepted for MP2331HGTL-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2331HGTL-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP2331HGTL-Z?

MP2331HGTL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP2331HGTL-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 MP2331HGTL-Z?

For technical support, including MP2331HGTL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2331HGTL-Z requirements.

6.How does Aetrix verify that MP2331HGTL-Z is sourced from the original manufacturer or authorized distributors?

All MP2331HGTL-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 MP2331HGTL-Z meets industry standards.

7.What is the process for return or replacement of MP2331HGTL-Z?

All MP2331HGTL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2331HGTL-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 MP2331HGTL-Z part is unused and in its original packaging.

Return procedure for MP2331HGTL-Z:

1.Submit a request within 90 days.

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

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