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

Monolithic Power Systems Inc. MPQ2315GJ-P

Name: MPQ2315GJ-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ2315GJ-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ2315GJ-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-23-8 Thin, TSOT-23-8

Datasheet:: MPQ2315GJ-P.pdf

Description:: IC REG BUCK ADJ 3A TSOT23-8

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Product details

Overview

MPQ2315GJ-P from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 120mΩ/50mΩ MOSFETs, delivering 3A continuous output current across a 4.5V–24V input range, fixed 500kHz switching frequency, and adjustable 0.8V–VIN output voltage - deployed in notebook I/O power, flat-panel TV supplies, and digital set-top box rails.

For engineers reviewing the MPQ2315GJ-P datasheet, MPQ2315GJ-P pinout, MPQ2315GJ-P application, or MPQ2315GJ-P equivalent, key selection criteria include its AAM light-load mode, thermal shutdown at 150°C, EN/SYNC dual-function pin, and TSOT23-8 package constraints for high-density PCB layouts.

Technical Context

The MPQ2315GJ-P uses peak-current-mode control with internal compensation, enabling fast transient response and stable loop behavior without external compensation components. Its integrated high-side and low-side MOSFETs operate synchronously to minimize conduction loss across the full 0–3A load range.

AAM (Advanced Asynchronous Modulation) dynamically shifts operation between CCM and PFM based on load and COMP voltage relative to an externally set AAM threshold, while the EN/SYNC pin supports both enable/disable logic and external clock synchronization from 200kHz to 2MHz.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 24V - supports wide industrial and consumer input rails including 12V and 19V systems.
Output Current	3A continuous - sufficient for powering core logic, memory, and interface ICs in portable electronics.
Switching Frequency	Fixed 500kHz - balances efficiency, size, and EMI; sync-capable up to 2MHz for noise-sensitive designs.
Feedback Voltage	0.791V typical (0.775–0.807V) - sets precise output regulation with standard resistor-divider networks.
HS/LS R_DS(on)	120mΩ / 50mΩ - reduces conduction loss and thermal rise at full load, enabling compact thermal design.
Quiescent Current	180μA typical - enables low standby power in always-on subsystems without compromising startup time.
Thermal Shutdown	150°C with 20°C hysteresis - protects against sustained overload or poor heatsinking in enclosed environments.

Pinout & Package

MPQ2315GJ-P is housed in an 8-pin TSOT23 package - ultra-compact, surface-mount, thermally enhanced for high-power density applications. Pin 1 is bottom-left when viewing top marking left-to-right per JEDEC MO-193BA.

Pin/Terminal	Circuit Role	Design Meaning
AAM	Advanced Asynchronous Modulation control	Resistor-to-ground sets transition point between CCM and PFM; tie to VCC forces CCM mode.
IN	Main input supply connection	Accepts 4.5–24V; requires local ceramic decoupling and low-impedance PCB trace to minimize switching noise.
SW	Power switch node	Drives external inductor; high di/dt path requiring short, wide copper routing and ground plane separation.
GND	System reference ground	Primary return for power and feedback paths; must be connected via multiple vias to inner ground plane.
BST	Bootstrap capacitor connection	Supplies floating gate drive for high-side MOSFET; requires 0.1–1μF ceramic capacitor to SW.
EN/SYNC	Enable and external clock input	Digital enable (1.25V threshold); also accepts 200kHz–2MHz square wave for frequency synchronization.
VCC	Bias regulator output	Internal 5V rail; decoupled with 0.1–0.22μF ceramic cap; powers internal circuitry and bootstrap driver.
FB	Output voltage feedback	Compares divided output to 0.8V reference; sensitive analog node requiring shortest possible trace to divider.

Key Features

Feature	Design Value
AAM Power Save Mode	Automatically transitions to PFM at light loads (<100mA), reducing quiescent current to ~130μA without sacrificing stability.
Integrated Power MOSFETs	120mΩ HS + 50mΩ LS switches eliminate external FETs and drivers, shrinking BOM and layout area by >30%.
Internal Soft Start	1.5ms typical ramp time prevents output overshoot and inrush current during power-up sequences.
OCP with Hiccup Recovery	Cycle-by-cycle current limit triggers hiccup mode on sustained short-circuit, limiting average fault current and die temperature.
Frequency Synchronization	EN pin accepts external clock (200kHz–2MHz), enabling noise spreading and multi-rail phase alignment in complex systems.

Applications

Notebook I/O Power

Digital Set-Top Box Rails

Use Scenario: Supplies USB controller, card reader, and display interface circuitry in ultrabooks and 2-in-1 laptops.

IC Role / Device Role / Timing Role: Primary buck regulator converting 12V or 19V adapter input to 5V/3.3V/1.8V system rails.

Use Value: AAM mode extends battery runtime during idle; TSOT23-8 footprint enables placement near connectors with minimal board area.

Use Scenario: Powers SoC peripherals, HDMI PHY, and audio DAC in cable/satellite STBs with strict thermal limits.

IC Role / Device Role / Timing Role: High-efficiency intermediate rail generator feeding downstream LDOs and PMICs.

Use Value: 500kHz fixed frequency simplifies EMI filter design; thermal shutdown ensures reliability under sealed enclosure conditions.

Flat Panel Monitor Logic

Industrial Human-Machine Interface

Use Scenario: Delivers stable 3.3V and 1.2V to timing controllers (TCON), LVDS transmitters, and microcontrollers in LCD monitors.

IC Role / Device Role / Timing Role: Main DC/DC converter in monitor power tree, operating from 12V or 24V open-frame supply.

Use Value: Wide 4.5–24V input accommodates both 12V and 24V industrial monitors; low 0.791V FB tolerance ensures ±1% output accuracy.

Use Scenario: Powers ARM-based HMI processors, touch controller, and CAN transceiver in factory automation panels.

IC Role / Device Role / Timing Role: Robust point-of-load regulator tolerant of automotive-grade input transients and temperature cycling.

Use Value: UVLO thresholds (3.9V rising / 3.25V falling) prevent brownout-induced resets; -40°C to +125°C junction rating supports uncooled enclosures.

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
MP2315GJ-Z	Same die, tape-and-reel packaging only; identical electrical specs and pinout.	No functional difference; used exclusively for automated assembly.	Select MP2315GJ-Z only for volume SMT production; MPQ2315GJ-P is sample-qualified and lab-ready.
TPS54331DR	3A, 28V input, 570kHz, but uses external MOSFETs and requires compensation network.	Larger solution size, higher BOM count, and longer design cycle due to external FET and loop tuning.	Choose TPS54331DR only if higher VIN (28V) or adjustable frequency beyond 2MHz is required; MPQ2315GJ-P offers faster time-to-test.

Compared with MP2315GJ-Z, MPQ2315GJ-P provides identical performance with sample-friendly packaging; versus TPS54331DR, it delivers lower system cost and smaller footprint via integrated power stages and internal compensation - critical for space-constrained consumer electronics.

Availability

MPQ2315GJ-P is available at Aetrix Electronics and suitable for notebook I/O power, flat-panel monitor logic, and industrial HMI applications requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for MPQ2315GJ-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 over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPQ2315 belongs to MPS's high-efficiency synchronous buck converter product line, engineered for compact, thermally robust power delivery in portable and space-constrained consumer electronics.

FAQ

What is the minimum recommended input capacitance for MPQ2315GJ-P?

A 22µF X5R/X7R ceramic capacitor is recommended at the IN pin, placed as close as possible to the IC with short, wide traces. This value meets RMS current requirements (≥1.5A) and suppresses high-frequency switching noise. For 19V input, a 0.1µF ceramic should be added in parallel for HF decoupling.

Can MPQ2315GJ-P operate with a 3.3V output at 3A using only ceramic output capacitors?

Yes - with a 4.7µH inductor and ≥44µF total ceramic output capacitance (e.g., three 22µF 0805 X5R caps), the MPQ2315GJ-P maintains <20mV peak-to-peak ripple at 3A. Ceramic ESR is negligible, so ripple is dominated by LC filtering; layout must minimize loop inductance.

How does the AAM pin affect light-load efficiency and output ripple?

AAM voltage sets the COMP threshold for PFM entry: lower AAM (e.g., 0.3V) improves ripple and stability but reduces light-load efficiency; higher AAM (e.g., 0.6V) boosts efficiency and transient response at the cost of increased ripple. Optimal value is typically 0.4–0.5V for 5V outputs.

Is an external bootstrap diode required for MPQ2315GJ-P?

An external BST diode (e.g., IN4148) is optional and recommended only when V_OUT = 3.3V or 5V AND duty cycle exceeds 65% (i.e., V_IN > 7.7V for 3.3V out). It improves high-side gate drive efficiency by reducing BST capacitor discharge through the internal charge pump.

What is the maximum achievable output voltage accuracy over temperature and line/load conditions?

Output voltage accuracy is ±1.5% over -40°C to +125°C junction temperature, ±5% line regulation (4.5–24V), and ±3% load regulation (0–3A), based on 0.775–0.807V FB tolerance and internal reference drift. External resistor tolerances dominate final system accuracy.

Does MPQ2315GJ-P support forced PWM mode across all load conditions?

No - it does not offer true forced PWM. However, driving the AAM pin to VCC forces continuous conduction mode (CCM) regardless of load, eliminating PFM discontinuities. This is useful for noise-sensitive applications but reduces light-load efficiency by ~15–20%.

What PCB layout practices are critical for stable MPQ2315GJ-P operation?

Three practices are essential: (1) connect IN and GND pins to a solid ground plane using ≥3 thermal vias; (2) route SW and BST traces wide and short, avoiding proximity to FB or EN; (3) place FB resistors and C_SS within 2mm of the IC, with FB trace shielded from noisy nodes.

MPQ2315GJ-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: SOT-23-8 Thin, TSOT-23-8

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):: 24V

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

Voltage - Output (Max):: 22.8V

Current - Output:: 3A

Frequency - Switching:: 500kHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TSOT-23-8

MPQ2315GJ-P FAQ

1.How can I place an order for MPQ2315GJ-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ2315GJ-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 MPQ2315GJ-P reliable?

The price and inventory of MPQ2315GJ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2315GJ-P is usually 5 days.

3.What payment methods are accepted for MPQ2315GJ-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2315GJ-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ2315GJ-P?

MPQ2315GJ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ2315GJ-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 MPQ2315GJ-P?

For technical support, including MPQ2315GJ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2315GJ-P requirements.

6.How does Aetrix verify that MPQ2315GJ-P is sourced from the original manufacturer or authorized distributors?

All MPQ2315GJ-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 MPQ2315GJ-P meets industry standards.

7.What is the process for return or replacement of MPQ2315GJ-P?

All MPQ2315GJ-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2315GJ-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 MPQ2315GJ-P part is unused and in its original packaging.

Return procedure for MPQ2315GJ-P:

1.Submit a request within 90 days.

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

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