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

Monolithic Power Systems Inc. MP3427GL-Z

Name: MP3427GL-Z
Brand: Monolithic Power Systems Inc.
SKU: MP3427GL-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP3427GL-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 22-PowerVFQFN

Datasheet:: MP3427GL-Z.pdf

Description:: IC REG BOOST ADJ 17A 22QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP3427GL-Z from Monolithic Power Systems is a 600kHz fixed-frequency, current-mode synchronous boost converter with 3V–8V input range, 17A switch-current limit, integrated 10mΩ low-side power FET, and external compensation for transient optimization-designed for high-power portable applications such as power banks delivering up to 30W from Li-ion battery input.

For engineers reviewing the MP3427GL-Z datasheet, MP3427GL-Z pinout, MP3427GL-Z application, or MP3427GL-Z equivalent, key selection considerations include its dual current-sensing configuration (internal/external), programmable UVLO via EN pin, thermal shutdown at 150°C, and QFN-22 (3mm×4mm) package with 22-pin layout optimized for high-current PCB routing and thermal dissipation.

Technical Context

The MP3427GL-Z implements peak-current-mode control with a 600kHz fixed switching frequency and supports both internal MOSFET current sensing (MODE = GND) and external resistor-based average-current limiting (MODE floating). Its transconductance error amplifier (160μA/V) drives COMP with 300V/V gain, enabling stable loop dynamics across wide load and input conditions.

VDD is powered from IN during startup and automatically switches to OUT when VOUT > VIN-maintaining gate drive strength and efficiency at low input voltages. The SDR driver delivers 5V gate drive synchronized to the internal switch, supporting external N-channel synchronous rectifiers with <3V threshold voltage.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3V to 8V - supports single-cell to dual-cell Li-ion battery inputs without pre-regulation.
Switching Frequency	450–690 kHz - fixed nominal 600kHz with ±15% variation over temperature; enables compact magnetics design.
Switch Current Limit	17A typical - supports ≥30W output power from 3.3V input; peak limit protects against short-circuit and overload.
FB Reference Voltage	1.225V ±12.5mV - sets output voltage accuracy; used with resistor divider to configure VOUT from VIN to 10V.
Thermal Shutdown	150°C with 25°C hysteresis - disables switching until die cools to 125°C, preventing permanent damage under sustained overload.
Shutdown Current	<1μA - enables ultra-low-power standby in battery-powered systems with long shelf life.
UVLO Threshold	2.68V rising with 250mV hysteresis - prevents erratic startup during brown-out; programmable via EN resistor network.

Pinout & Package

MP3427GL-Z is housed in a thermally enhanced 22-pin QFN package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad (PGND-connected) for efficient heat transfer to PCB ground plane.

Pin/Terminal	Circuit Role	Design Meaning
1 BST	Bootstrap supply	Provides 5V gate drive for SDR; charged from OUT via internal diode; requires external BST capacitor.
2 SDR	Synchronous rectifier driver	Complementary gate signal for external N-MOSFET; 5V logic-compatible; enables >90% efficiency at high load.
3 OUT	Output voltage sense & VDD source	Feeds feedback divider and powers VDD when VOUT > VIN-critical for low-input-voltage operation.
4 EN	Enable with UVLO programming	Active-high control; 1.33V turn-on threshold; sinks 4.5μA to set VIN UVLO hysteresis via resistor divider.
5 MODE	Current-sense mode select	GND = internal sensing; floating = external R_SENSE; determines peak vs. average current protection behavior.
6 SENSE	External current-sense input	Connects to R_SENSE between IN and SENSE; 54mV threshold triggers hiccup-mode overload protection.
7–8,19–21 SW	Power switch drain	High-current node shared across five pins; connects to inductor and rectifier; minimizes trace resistance and thermal rise.
9–10,17–18,22 PGND	Power ground	Five dedicated PGND pins reduce ground bounce and improve EMI performance in high-dI/dt switching.
11 IN	Main input supply	Bypassed locally with ≥2×22μF ceramic capacitors; handles high AC ripple current from boost topology.
12 VDD	Internal bias supply	Decoupled with 2.2μF ceramic cap; powered from IN at startup, then from OUT-ensures stable gate drive.
13 COMP	Compensation node	Connects RC network to AGND; sets loop bandwidth and phase margin; clamped to 1.8V during soft-start.
14 FB	Feedback input	1.225V reference; resistor divider from VOUT sets output voltage; input bias current ≤50nA minimizes divider error.
15 SS	Soft-start control	Charged by 7μA current source; controls ramp rate of COMP voltage and switching frequency to limit inrush current.
16 AGND	Analog ground	Separate from PGND; provides quiet reference for FB, COMP, and error amplifier-critical for regulation accuracy.

Key Features

Feature	Design Value
Wide 3V–8V input range	Enables direct integration with single- or dual-cell Li-ion batteries (2.7–8.4V system range) without intermediate regulation.
10mΩ integrated low-side FET	Reduces conduction loss at 17A peak, supporting >92% efficiency at 4A/8V output from 3.3V input.
Programmable UVLO via EN pin	Eliminates need for external supervisor IC; hysteresis set by resistor divider to prevent oscillation near cutoff.
External soft-start capacitor	33nF typical value controls startup dV/dt and inrush; prevents input capacitor stress and system brownout.
Dual current-sensing architecture	Internal sensing for simplicity; external R_SENSE for precision and higher current capability (>6A recommended).
Thermal shutdown with 25°C hysteresis	Ensures safe recovery after overload without manual reset; avoids thermal cycling damage to silicon or PCB.

Applications

Power Banks

Tablets

Use Scenario: Portable USB-C PD power bank delivering 5V/3A or 9V/2A from 3.7V Li-ion cell.

IC Role / Device Role / Timing Role: Primary synchronous boost controller regulating output voltage while managing inrush, thermal limits, and battery discharge curve.

Use Value: Delivers 30W peak power in 3×4mm footprint; 17A current limit accommodates 5V/6A or 9V/3.3A configurations with margin.

Use Scenario: Main system boost rail for display backlight or SSD interface in 7–10 inch tablets.

IC Role / Device Role / Timing Role: High-efficiency DC-DC converter generating stable 8–10V rail from 3.3V–4.2V battery supply.

Use Value: 600kHz switching enables small 1μH inductor; QFN-22 thermal pad sustains 2.6W dissipation at 125°C ambient.

POS Terminals

Electronic Cigarettes

Use Scenario: Battery-powered retail POS terminal requiring 5V/2A for thermal printer and 12V/0.5A for barcode scanner.

IC Role / Device Role / Timing Role: Dual-rail boost controller with configurable output via FB divider; supports dynamic load step response.

Use Value: External compensation allows tuning for fast transient response to printer motor startup spikes without output overshoot.

Use Scenario: High-drain vaping device drawing pulsed 10A loads from 3.7V battery to drive 0.15Ω coil at 4.2V.

IC Role / Device Role / Timing Role: High-current boost regulator enabling variable wattage modes (15–40W) with precise current limiting.

Use Value: 17A switch limit and hiccup-mode protection prevent coil burnout or battery venting during dry puff events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
RT4801BZQW	4.5V–36V input, 5A switch limit, 500kHz, no external current-sense option	Targets industrial 12V/24V input; lacks 17A capability and dual-sensing flexibility	Choose for wide-input industrial rails where 5A suffices and board space permits larger inductors.
TPS61088RHLR	2.7V–12V input, 10A switch limit, 500kHz, integrated compensation, no MODE pin	Fixed internal sensing only; lower current rating; simpler layout but less protection granularity	Prefer for cost-sensitive consumer designs needing <10A and minimal external components.

Compared with RT4801BZQW and TPS61088RHLR, MP3427GL-Z uniquely combines 17A current capability, dual current-sensing architecture, and 3×4mm QFN packaging-making it the only option capable of 30W portable boost conversion with thermal headroom and programmable protection.

Availability

MP3427GL-Z is available at Aetrix Electronics and suitable for power banks, tablets, POS terminals, and electronic cigarettes requiring stable component supply, high-current density, and long-term lifecycle support.

Supply support for MP3427GL-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 analog and power ICs, with over two decades of leadership in DC-DC conversion and motor control solutions.

The MP3427 belongs to MPS's high-current synchronous boost converter product line, engineered specifically for battery-powered portable electronics demanding >25W output in minimal PCB area and strict thermal constraints.

FAQ

What is the maximum continuous output power achievable with MP3427GL-Z?

At 3.3V input and 8V output, MP3427GL-Z delivers up to 30W continuous power with proper thermal management-verified at 4A load with 2.6W dissipation in QFN-22 package on 4-layer PCB per θJA=48°C/W. Efficiency exceeds 92% under these conditions, and derating is required above 125°C junction temperature.

Can MP3427GL-Z operate with an output voltage lower than input voltage?

No-MP3427GL-Z is a boost-only converter and cannot regulate VOUT < VIN. Its minimum output is equal to VIN (no buck capability), and operation below VIN violates the functional block diagram and causes undefined behavior. For buck-boost applications, consider MPS's MP2965 or MPQ4272 families.

How does the MODE pin affect overcurrent protection behavior?

When MODE = GND, MP3427 uses internal current sensing and triggers cycle-by-cycle peak-current limiting at ~17A. When MODE is floating, it uses external R_SENSE and activates average-current hiccup mode at 54mV (e.g., 14.4A with 3.75mΩ resistor), with 1.1ms fault detection and 60ms restart delay-providing safer thermal response for sustained overload.

Is an external Schottky diode required when using the SDR driver?

No-SDR directly drives an external N-channel MOSFET as synchronous rectifier. However, if VOUT ≤5V and duty cycle is high, BST voltage may drop below 4.5V, causing SDR dropout. In that case, a Schottky diode from OUT to BST is recommended to maintain bootstrap charge, per Figure 3 in the datasheet.

What is the minimum recommended output capacitance for stable regulation?

Three 22μF X7R ceramic capacitors (66μF total) are recommended for most applications. This ensures sufficient capacitance for <50mV output ripple at 4A load and provides adequate ESR damping for loop stability with the transconductance error amplifier-validated in typical application circuits on page 18 of the datasheet.

Does MP3427GL-Z support automatic frequency foldback in light-load conditions?

Yes-it employs pulse-skipping mode (PSM) at very light loads and foldback frequency reduction as load decreases. Below ~100mA, switching frequency drops below 600kHz to maintain >85% efficiency; at <10mA, it enters burst-mode PSM with single-pulse-per-cycle operation to minimize quiescent current.

How is the soft-start time determined, and can it be adjusted?

Soft-start time is set by external capacitor on SS pin: t_SS ≈ C_SS × 0.65V / 7μA. A 33nF capacitor yields ~3ms ramp; increasing C_SS linearly extends soft-start duration. This controls inrush current and prevents input voltage sag during startup-critical for battery-fed systems.

MP3427GL-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 22-PowerVFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Function:: Step-Up

Output Configuration:: Positive

Topology:: Boost

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 3V

Voltage - Input (Max):: 8V

Voltage - Output (Min/Fixed):: 3V

Voltage - Output (Max):: 10V

Current - Output:: 17A (Switch)

Frequency - Switching:: 450kHz ~ 690kHz

Synchronous Rectifier:: Both

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 22-QFN (3x4)

MP3427GL-Z FAQ

1.How can I place an order for MP3427GL-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP3427GL-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 MP3427GL-Z reliable?

The price and inventory of MP3427GL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3427GL-Z is usually 5 days.

3.What payment methods are accepted for MP3427GL-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3427GL-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP3427GL-Z?

MP3427GL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP3427GL-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 MP3427GL-Z?

For technical support, including MP3427GL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3427GL-Z requirements.

6.How does Aetrix verify that MP3427GL-Z is sourced from the original manufacturer or authorized distributors?

All MP3427GL-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 MP3427GL-Z meets industry standards.

7.What is the process for return or replacement of MP3427GL-Z?

All MP3427GL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3427GL-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 MP3427GL-Z part is unused and in its original packaging.

Return procedure for MP3427GL-Z:

1.Submit a request within 90 days.

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

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