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

Monolithic Power Systems Inc. MP4313GRE-P

Name: MP4313GRE-P
Brand: Monolithic Power Systems Inc.
SKU: MP4313GRE-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP4313GRE-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 20-PowerVFQFN

Datasheet:: MP4313GRE-P.pdf

Description:: IC REG BUCK ADJ 3A 20QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP4313GRE-P from Monolithic Power Systems is a 45V, 3A synchronous step-down DC/DC converter with integrated 48mΩ high-side and 20mΩ low-side MOSFETs, frequency spread spectrum (FSS), and 18μA sleep-mode quiescent current. It operates from 3.3V to 45V input, supports automotive cold-crank via low-dropout mode, and delivers regulated output in radios and battery-powered systems.

For engineers reviewing the MP4313GRE-P datasheet, MP4313GRE-P pinout, MP4313GRE-P application, or MP4313GRE-P equivalent, key selection criteria include its 350–1000kHz configurable switching frequency, 100ns minimum on-time, AAM/FCCM mode selectability, and QFN-20 wettable flank package for automated optical inspection and thermal reliability.

Technical Context

The MP4313GRE-P implements current-mode control with fast loop response and includes frequency foldback at startup to prevent inductor current runaway. Its dual-mode operation-Advanced Asynchronous Modulation (AAM) for light-load efficiency and Forced Continuous Conduction Mode (FCCM) for ripple-sensitive loads-is selected via the MODE pin.

It integrates symmetric VIN routing and FSS to reduce EMI, meets CISPR25 Class 5 radiated/conducted emissions limits, and provides out-of-phase SYNCO clock output for multi-converter synchronization without phase conflict.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.3V to 45V - Supports wide automotive battery transients including cold-crank (down to ~3.3V) and load-dump conditions.
Output Current	Up to 3A continuous - Sustained delivery with internal MOSFETs rated 48mΩ (HS) and 20mΩ (LS) at typical V_GS.
Quiescent Current	18μA in sleep mode - Enables >1-year battery life in always-on IoT sensors or telematics modules.
Switching Frequency	350kHz to 1000kHz, configurable via FREQ pin resistor - Allows optimization of size (higher f_SW) vs. efficiency (lower f_SW) and EMI compliance.
Feedback Reference	0.815V ±8mV - Enables precise output regulation from 0.815V up to 0.95×V_IN using external resistor divider.
Power Good Threshold	95%–105% of nominal V_OUT - Open-drain PG signal asserts only when output is within tight regulation window.
Min On-Time	100ns - Supports high step-down ratios (e.g., 45V→3.3V) at 470kHz without pulse-skipping instability.

Pinout & Package

MP4313GRE-P is housed in a QFN-20 (4mm × 4mm) wettable flank package with exposed thermal pad, supporting enhanced solder joint inspection and thermal dissipation (θ_JA = 23°C/W on EVQ4313-R-00A PCB).

Pin/Terminal	Circuit Role	Design Meaning
1 MODE	Mode selection input	Logic-high enables FCCM; logic-low enables AAM - must be actively driven, not floated.
2 SYNCIN	External clock input	Accepts 350–1000kHz clock; internal high-Z requires ≤51kΩ pull-down if unused.
3,12 VIN	Main power input	Supplies control circuitry and HS-FET; requires local ceramic decoupling to PGND.
4,5,10,11 PGND	Power ground return	Low-impedance path for switch node current; must be connected to thermal pad and VIN decoupling.
6 BST	Bootstrap supply	Connects BST-to-SW capacitor (typically 0.1μF) to gate-drive HS-FET above VIN rail.
7,8 SW	Switch node output	Drives external inductor; high di/dt node requiring tight layout and Kelvin PGND connection.
9 EN	Enable control	Active-high (V_{EN_RISING} = 1.0V); 190mV hysteresis prevents chatter during slow-rising supplies.
13 SYNCO	Synchronized clock output	180° out-of-phase with internal oscillator or inverted SYNCIN - float if unused.
14 PG	Power good indicator	Open-drain output pulled high only when V_OUT is within ±5% of target - requires external pull-up.
15 NC	No-connect terminal	Must be tied to V_CC or V_OUT ≥3V; floating causes undefined behavior.
16 VCC	Bias supply	Internal LDO output; requires 1μF ceramic capacitor to AGND placed adjacent to pin.
17 AGND	Analog ground reference	Separate from PGND; connects FB, SS, FREQ, MODE, SYNCIN, and PG for noise immunity.
18 FB	Feedback input	Monitors resistive divider; 0.815V threshold sets V_OUT = 0.815V × (1 + R_UP/R_DN).
19 SS	Soft-start timing	6μA current source charges external capacitor; t_SS ≈ 6μA × C_SS/0.815V.
20 FREQ	Frequency setting	Resistor to AGND selects f_SW; 62kΩ yields 470kHz per datasheet curve.

Key Features

Feature	Design Value
Frequency Spread Spectrum (FSS)	Reduces peak EMI by ±6% frequency dithering - enables CISPR25 Class 5 compliance without added filter components.
Selectible AAM/FCCM Modes	AAM minimizes light-load IQ (18μA); FCCM maintains fixed f_SW and low output ripple for noise-sensitive analog rails.
Low-Dropout (LDO) Mode	Extends regulation down to V_IN − V_OUT < 100mV - sustains output during automotive cranking where V_IN dips to ~3.3V.
Out-of-Phase SYNCO Output	Enables interleaved operation of multiple MP4313GRE-P converters - cuts input/output ripple by >50% vs. parallel non-synchronized units.
Wettable Flank QFN	Side-wettable leads allow automated AOI of solder fillets - improves manufacturing yield and field-reliability in automotive production.

Applications

Automotive Infotainment

Radios & Telematics

Use Scenario: Powering DSP, audio codecs, and display controllers in head units under 12V/24V battery input with cold-crank events.

IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3V/5V rails with PG monitoring and thermal shutdown.

Use Value: Low 1.7μA shutdown current extends backup battery life; FSS ensures EMC compliance in crowded RF environments.

Use Scenario: Supplying LTE/C-V2X modems and GNSS receivers in vehicle connectivity modules.

IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with SYNCIN/SYNCO for synchronized multi-rail power sequencing.

Use Value: 100ns min on-time supports 45V→3.3V conversion at 470kHz; wettable flank package ensures IPC-A-610 Class 3 assembly reliability.

Industrial Battery Systems

Portable Test Equipment

Use Scenario: Regulating power for handheld meters and data loggers operating from Li-ion or 24V industrial batteries.

IC Role / Device Role / Timing Role: Main system supply with soft-start, PG indication, and hiccup-mode OCP for fault containment.

Use Value: 18μA sleep-mode IQ enables multi-year operation on single-cell Li-ion; AAM mode eliminates audible coil whine.

Use Scenario: Powering FPGA I/O banks and ADC front-ends in portable oscilloscopes and signal analyzers.

IC Role / Device Role / Timing Role: Low-noise, low-ripple power source with FCCM mode and precision 0.815V feedback reference.

Use Value: FCCM ensures constant switching frequency for predictable EMI filtering; ±8mV V_FB tolerance supports <±1% output accuracy.

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
MPQ4313GRE-A	Automotive-grade (AEC-Q100 Grade 1), same electrical specs, extended temp range (−40°C to +125°C junction)	Required for under-hood or dashboard-mounted automotive ECUs; identical pinout and layout	Select for automotive production; MP4313GRE-P is commercial-grade (−40°C to +125°C ambient, not qualified)
LM61480RQR	TI part: 42V, 8A, 1.5MHz max f_SW, no FSS, higher IQ (15μA typ in FPWM)	Larger output current capability but lacks FSS and wettable flank; different pinout and layout incompatible	Choose when >3A output or higher f_SW needed; avoid if CISPR25 Class 5 or AOI requirements apply

Compared with MPQ4313GRE-A, the MP4313GRE-P offers identical functionality at lower cost for non-automotive applications, while the LM61480RQR trades FSS and manufacturability for higher current and frequency-making it unsuitable for space-constrained, EMI-sensitive designs requiring drop-in replacement.

Availability

MP4313GRE-P is available at Aetrix Electronics and suitable for automotive infotainment, industrial battery systems, portable test equipment, and radios requiring stable component supply across volume production and design-in phases.

Supply support for MP4313GRE-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 power management ICs, with over two decades of innovation in DC/DC converters, motor drivers, and LED drivers.

The MP4313 product line targets high-reliability, EMI-conscious power conversion in automotive and industrial applications, emphasizing low IQ, wide VIN range, and integrated features like FSS and wettable flank packaging.

FAQ

What is the maximum recommended PCB copper thickness for thermal performance of MP4313GRE-P?

The EVQ4313-R-00A evaluation board uses 2oz copper (70μm) across all four layers, achieving θ_JA = 23°C/W. For production designs, 2oz inner-layer copper with thermal vias under the exposed pad is strongly recommended to maintain junction temperature below 125°C at 3A continuous load.

Can MP4313GRE-P operate without an external bootstrap diode?

Yes - the MP4313GRE-P integrates an internal bootstrap diode. Only an external 0.1μF ceramic capacitor between BST and SW pins is required. No external diode or resistor is needed, simplifying layout and reducing BOM count.

How does the MODE pin affect efficiency at light loads?

In AAM mode (MODE = low), the converter skips pulses to maintain regulation, reducing switching losses and achieving 18μA IQ. In FCCM (MODE = high), it maintains fixed frequency and continuous inductor current, increasing light-load IQ to ~9.5mA at 470kHz but eliminating subharmonic ripple.

Is the FREQ pin compatible with standard resistor E-series values?

Yes - the f_SW vs. R_FREQ curve (datasheet page 13) is linear across 12kΩ–100kΩ. Common values like 62kΩ (470kHz), 30kΩ (650kHz), and 12kΩ (1000kHz) are validated and widely used in reference designs.

Does the PG pin require a pull-up resistor, and what value is recommended?

Yes - PG is open-drain and requires an external pull-up. A 10kΩ resistor to V_CC or system 3.3V rail is recommended: it ensures fast rise time (<1μs) while limiting sink current to <0.3mA when asserted low.

What failure protections are implemented beyond over-current and thermal shutdown?

In addition to hiccup-mode OCP and 170°C thermal shutdown, the MP4313GRE-P includes input UVLO (2.8V rising), PG fault detection (±6.5% window), valley-current limiting, reverse-current blocking, and frequency foldback during startup to prevent inductor saturation.

Can SYNCIN accept CMOS or LVDS logic levels?

SYNCIN accepts CMOS-level inputs: V_{SYNC_RISING} = 1.8V and V_{SYNC_FALLING} = 0.4V thresholds make it compatible with standard 3.3V or 5V logic families. It is not LVDS-compatible due to single-ended input structure and lack of differential receiver.

MP4313GRE-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 20-PowerVFQFN

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):: 3.3V

Voltage - Input (Max):: 45V

Voltage - Output (Min/Fixed):: 0.815V

Voltage - Output (Max):: 42.75V

Current - Output:: 3A

Frequency - Switching:: 350kHz ~ 1MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: 20-QFN (4x4)

MP4313GRE-P FAQ

1.How can I place an order for MP4313GRE-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP4313GRE-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 MP4313GRE-P reliable?

The price and inventory of MP4313GRE-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4313GRE-P is usually 5 days.

3.What payment methods are accepted for MP4313GRE-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4313GRE-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP4313GRE-P?

MP4313GRE-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP4313GRE-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 MP4313GRE-P?

For technical support, including MP4313GRE-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4313GRE-P requirements.

6.How does Aetrix verify that MP4313GRE-P is sourced from the original manufacturer or authorized distributors?

All MP4313GRE-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 MP4313GRE-P meets industry standards.

7.What is the process for return or replacement of MP4313GRE-P?

All MP4313GRE-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4313GRE-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 MP4313GRE-P part is unused and in its original packaging.

Return procedure for MP4313GRE-P:

1.Submit a request within 90 days.

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

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