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

Monolithic Power Systems Inc. MPQ4470GL-AEC1-P

Name: MPQ4470GL-AEC1-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ4470GL-AEC1-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4470GL-AEC1-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 20-VFQFN Exposed Pad

Datasheet:: MPQ4470GL-AEC1-P.pdf

Description:: IC REG BUCK ADJ 5A 20QFN

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Product details

Overview

MPQ4470GL-AEC1-P from Monolithic Power Systems is a fully-integrated, AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 5A continuous output current across 4.5V–36V input range. It integrates 40mΩ high-side and 20mΩ low-side MOSFETs, features latch-off over-voltage protection (OVP), programmable soft-start, and operates at 100kHz–1MHz switching frequency. Used in automotive infotainment power rails where input transients up to 36V and thermal robustness to +125°C junction are required.

For engineers reviewing the MPQ4470GL-AEC1-P datasheet, MPQ4470GL-AEC1-P pinout, MPQ4470GL-AEC1-P application, or MPQ4470GL-AEC1-P equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, OVP latch behavior, 1% reference voltage accuracy, bootstrap capacitor charging architecture for low-dropout operation, and QFN20 (3mm×4mm) thermal performance with θJA = 48°C/W.

Technical Context

The MPQ4470GL-AEC1-P employs fixed-frequency peak-current-mode PWM control with feed-forward input voltage compensation to maintain stable switching frequency across 4.5V–36V input. Its proprietary dead-time control prevents shoot-through between integrated 40mΩ/20mΩ MOSFETs, while internal bootstrap regulator enables reliable high-side gate drive down to 0.8V output.

It implements cycle-by-cycle over-current protection with 100μs hiccup timer, non-latching UVLO (rising threshold 4.0V, hysteresis 900mV), and thermal shutdown at 175°C with 45°C hysteresis. The 1% accurate 0.815V feedback reference ensures tight output regulation across –40°C to +125°C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 36V - supports automotive battery transients including load dump up to 36V without external clamping.
Continuous Output Current	5A - sustained delivery into thermally constrained PCB layouts using QFN20 package with exposed pads.
Feedback Reference Voltage	0.815V ±1% - enables precise output setting from 0.8V to 0.9×VIN with minimal resistor divider error.
Switching Frequency Range	100kHz to 1MHz - adjustable via external resistor on FREQ pin; higher frequencies reduce external inductor/capacitor size.
High-Side R_DS(on)	40mΩ (typ.) - limits conduction loss at full load, critical for >90% efficiency at 5A/5V output.
OVP Response	Latch-off type - forces full shutdown on V_FB > 1.25×V_REF; requires power cycle recovery, enhancing system safety in fault conditions.
Thermal Shutdown Threshold	175°C (typ.) with 45°C hysteresis - protects die during sustained overload or poor heatsinking; resumes after cooldown to ~130°C.

Pinout & Package

MPQ4470GL-AEC1-P is housed in a thermally enhanced 3mm×4mm, 20-pin QFN package with five exposed thermal pads (pins 8, 19, 21, 22, 23 for IN; pins 9, 10, 17, 18, 24, 25 for SW; pins 11–16 as PGND). Package meets AEC-Q100 Grade 1 requirements for automotive under-hood applications.

Pin/Terminal	Circuit Role	Design Meaning
1	AGND	Analog ground reference for feedback and control circuitry; must be separated from PGND and connected at single point to minimize noise coupling.
2	FREQ	Frequency set input - connects to GND via resistor to program ON-time and achieve target switching frequency (100kHz–1MHz).
3	FB	Feedback input - senses output voltage via resistor divider; internal 1% reference enables accurate regulation from 0.8V to 0.9×VIN.
4	SS	Soft-start capacitor node - internal 8.5μA current source ramps SS voltage to control output voltage slew rate and prevent inrush current.
5	EN	Enable input - active-high with 1.25V rising threshold and 0.86V falling threshold; includes internal 1MΩ pull-down for default disable.
6	PGOOD	Open-drain power-good flag - asserts high after V_FB ≥ 90% V_REF with 700μs delay; signals stable output to downstream logic or sequencer.
7	BST	Bootstrap supply - connects to SW via 0.1μF–1μF capacitor to generate floating gate drive for high-side MOSFET.
8,19,21,22,23	IN	Main input power - high-current path requiring wide copper pours and multiple vias to minimize IR drop and thermal rise.
9,10,17,18,24,25	SW	Switch node - connects to inductor; high dv/dt node requiring minimized trace area and separation from sensitive analog signals.
11–16	PGND	Power ground - return path for high-current switch and output inductor; must be solid plane with low-inductance connection to IN and SW paths.
20	VCC	Internal bias supply - requires local 1μF ceramic decoupling to stabilize internal LDO and gate drivers.

Key Features

Feature	Design Value
Integrated Power Stage	40mΩ HS + 20mΩ LS MOSFETs eliminate external discrete switches and reduce BOM count and layout complexity.
AEC-Q100 Grade 1 Qualification	Rated for –40°C to +125°C junction operation with full characterization per automotive reliability standards.
Latch-Off Over-Voltage Protection	Shuts down permanently on V_FB > 1.25×V_REF, preventing damage during feedback divider failure or transient overvoltage events.
Proprietary Switching-Loss Reduction	Optimized gate drive timing and dead-time control minimize shoot-through and switching losses across full load range.
Low Dropout Mode Support	Bootstrap refresh circuit maintains high-side drive even at VIN–VOUT < 2V, enabling operation near input rail.

Applications

Automotive Infotainment Power

ADAS Camera Module Supply

Use Scenario: Powers SoC, display interface, and audio codecs in head-unit systems exposed to 12V battery with cold-crank (4.5V) and load-dump (36V) transients.

IC Role / Device Role / Timing Role: Primary 5V/3.3V POL regulator with fast transient response to handle burst-mode CPU loads and EMI-sensitive video signal chains.

Use Value: AEC-Q100 Grade 1 qualification and latch-off OVP ensure functional safety compliance and prevent cascading failures during feedback faults.

Use Scenario: Supplies image sensor, ISP, and serializer in rear-view or surround-view cameras mounted in vehicle exterior zones.

IC Role / Device Role / Timing Role: High-efficiency buck converter operating continuously at ambient temperatures up to +105°C with minimal thermal derating.

Use Value: 5A capability and QFN20 thermal design support compact camera housings; 1% V_REF ensures stable sensor bias under varying illumination conditions.

Industrial Telematics Gateway

Railway Onboard Control Unit

Use Scenario: Provides isolated 5V and 3.3V rails for LTE modem, GNSS receiver, and CAN controller in fleet management units installed in engine bays.

IC Role / Device Role / Timing Role: Input-transient-hardened DC/DC stage preceding secondary regulators; handles ISO 7637-2 pulse 5a (36V/100ms).

Use Value: Wide 4.5V–36V input range eliminates need for pre-regulator; thermal shutdown with hysteresis prevents lockup during extended high-temp operation.

Use Scenario: Delivers 12V intermediate bus from 24V–110V nominal railway battery to downstream converters in onboard signaling and diagnostics modules.

IC Role / Device Role / Timing Role: First-stage buck converter stepping down high-voltage traction battery to safe intermediate rail; operates in CCM across full load range.

Use Value: Robust 36V absolute max rating and 5A current capability enable direct use without series FET; exposed-pad QFN aids convection cooling in sealed 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
MPQ4470AGL-AEC1-P	Omits latch-off OVP; retains all other specs including AEC-Q100 Grade 1, 5A rating, and 4.5V–36V input.	Suitable where feedback fault tolerance is managed at system level (e.g., redundant monitoring), not device level.	Select when OVP latch is unnecessary and cost reduction is prioritized without sacrificing automotive qualification.
TPS54560QDGQRQ1	Lower 42V abs max input; no integrated low-side FET (external sync rectifier required); 5.5A rated but higher R_DS(on) (75mΩ HS).	Requires external MOSFET and gate driver; less compact solution with higher layout sensitivity.	Choose only if TI's WEBENCH ecosystem or specific pin compatibility with legacy designs drives selection.

Compared with MPQ4470AGL-AEC1-P, the MPQ4470GL-AEC1-P adds critical latch-off OVP for fail-safe behavior in unmonitored automotive subsystems; versus TPS54560QDGQRQ1, it delivers superior integration, smaller footprint, and lower conduction loss-enabling simpler, more reliable 5A POL designs.

Availability

MPQ4470GL-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, industrial telematics gateways, and railway onboard control units requiring stable component supply with AEC-Q100 compliance and long-term production continuity.

Supply support for MPQ4470GL-AEC1-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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPQ4470 family belongs to MPS's automotive-grade power management portfolio, designed specifically for demanding vehicular environments requiring AEC-Q100 qualification, wide-input operation, and robust fault protection.

FAQ

What is the difference between MPQ4470GL-AEC1-P and MPQ4470AGL-AEC1-P?

The MPQ4470GL-AEC1-P includes latch-off over-voltage protection (OVP), which disables the device permanently upon V_FB exceeding 1.25×V_REF until power is cycled. The MPQ4470AGL-AEC1-P omits this feature while retaining identical electrical specs, package, and AEC-Q100 Grade 1 qualification. This makes the GL variant preferred for safety-critical automotive subsystems where feedback fault isolation is mandatory.

Can MPQ4470GL-AEC1-P operate with input voltage below 4.5V?

No. The device incorporates an under-voltage lockout (UVLO) with a rising threshold of 4.0V ±0.3V and hysteresis of 900mV. Below 3.1V (falling threshold), the IC remains disabled. Attempting operation below 4.5V violates the recommended operating condition and risks unstable regulation or failure to start. For sub-4.5V inputs, a pre-regulator or alternative converter is required.

How is the switching frequency set, and what resistor value yields 500kHz?

Switching frequency is set by connecting a resistor (R_FREQ) from the FREQ pin to GND. Using the formula f_SW(kHz) = 10⁶ / [96 × R_FREQ(kΩ) + t_DELAY(ns) × V_IN/V_OUT], with t_DELAY ≈ 20ns and typical V_IN/V_OUT = 24V/3.3V ≈ 7.3, a 63.4kΩ resistor achieves ~500kHz at VIN = 24V. Frequency varies <±5% across input range due to feed-forward compensation.

Does MPQ4470GL-AEC1-P support forced PWM mode at light load?

No. The device automatically enters skip-mode (pulse-frequency modulation) at light loads to maximize efficiency. There is no pin or register to force continuous conduction mode (CCM) across all loads. Skip-mode reduces switching losses by gating the high-side FET, allowing the inductor current to reach zero before next cycle-verified by typical efficiency curves showing >85% efficiency at 10mA output.

What is the minimum output capacitance required for stability with ceramic output caps?

When using low-ESR ceramic capacitors, external ramp compensation (R₄, C₄) is required for stability. The datasheet specifies that R₂ (lower FB divider resistor) should be 5kΩ–40kΩ, and recommends ≥4.7nF soft-start capacitor if total output capacitance exceeds 330μF. Minimum bulk output capacitance is not specified, but typical designs use ≥22μF X7R ceramics with <5mΩ ESR to meet transient response and ripple targets.

Is the PGOOD pin compatible with 1.8V logic systems?

Yes. The PGOOD pin is an open-drain output with no internal pull-up. When pulled up to any valid logic rail (1.8V, 3.3V, or 5V) via an external resistor (e.g., 100kΩ), it asserts HIGH at that voltage level once V_FB reaches 90% of V_REF after ~700μs delay. Its sinking capability exceeds 1mA, ensuring clean logic-level signaling into standard CMOS inputs.

How does the bootstrap capacitor recharge during low-duty-cycle operation?

The internal bootstrap regulator uses a PMOS pass transistor from IN to BST, activated when V_BST–V_SW falls below ~2.3V. During low-duty-cycle operation (e.g., V_OUT close to V_IN), the LS-FET conduction time increases, maximizing VIN–VSW differential and enabling rapid BST capacitor recharge. This allows reliable high-side drive even at 95% duty cycle, supporting low-dropout operation down to V_IN–V_OUT < 2V.

MPQ4470GL-AEC1-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 20-VFQFN Exposed Pad

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):: 36V

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

Voltage - Output (Max):: 32.4V

Current - Output:: 5A

Frequency - Switching:: 100kHz ~ 1MHz

Synchronous Rectifier:: Yes

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 20-QFN (3x4)

MPQ4470GL-AEC1-P FAQ

1.How can I place an order for MPQ4470GL-AEC1-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4470GL-AEC1-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 MPQ4470GL-AEC1-P reliable?

The price and inventory of MPQ4470GL-AEC1-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4470GL-AEC1-P is usually 5 days.

3.What payment methods are accepted for MPQ4470GL-AEC1-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4470GL-AEC1-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4470GL-AEC1-P?

MPQ4470GL-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4470GL-AEC1-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 MPQ4470GL-AEC1-P?

For technical support, including MPQ4470GL-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4470GL-AEC1-P requirements.

6.How does Aetrix verify that MPQ4470GL-AEC1-P is sourced from the original manufacturer or authorized distributors?

All MPQ4470GL-AEC1-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 MPQ4470GL-AEC1-P meets industry standards.

7.What is the process for return or replacement of MPQ4470GL-AEC1-P?

All MPQ4470GL-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4470GL-AEC1-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 MPQ4470GL-AEC1-P part is unused and in its original packaging.

Return procedure for MPQ4470GL-AEC1-P:

1.Submit a request within 90 days.

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

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