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

Monolithic Power Systems Inc. MP4470AGL-Z

Name: MP4470AGL-Z
Brand: Monolithic Power Systems Inc.
SKU: MP4470AGL-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP4470AGL-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 20-VFQFN Exposed Pad

Datasheet:: MP4470AGL-Z.pdf

Description:: IC REG BUCK ADJ 5A 20QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP4470AGL-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter delivering 5A continuous output current across 4.5V–36V input range, featuring integrated 40mΩ high-side and 20mΩ low-side MOSFETs, 1% reference voltage accuracy, and programmable soft-start. It enables compact, high-efficiency power conversion in automotive infotainment systems with fast transient response and robust thermal shutdown at 175°C.

For engineers reviewing the MP4470AGL-Z datasheet, MP4470AGL-Z pinout, MP4470AGL-Z application, or MP4470AGL-Z equivalent, key selection criteria include its 200kHz–1MHz adjustable switching frequency, absence of OVP latch (vs. MP4470), PGOOD open-drain timing (~700μs delay), and QFN20 (3×4mm) thermal performance (θJA = 48°C/W).

Technical Context

The MP4470AGL-Z operates in forced CCM or automatic skip mode depending on load, using internal current-mode PWM control with feed-forward input voltage compensation to maintain stable switching frequency across input voltage variations. Its proprietary dead-time control prevents shoot-through between integrated MOSFETs while enabling low-dropout operation via bootstrap refresh.

It implements cycle-by-cycle over-current protection with 100μs hiccup timer, under-voltage lockout (4.0V rising threshold), and thermal shutdown with 45°C hysteresis. Unlike MP4470, it omits output over-voltage latch protection but retains UVP, SCP, OCP, and PGOOD monitoring referenced to 0.815V feedback threshold.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 36V - supports wide industrial and automotive battery-supplied rails including cold-crank transients.
Continuous Output Current	5A - sustained delivery without derating up to +125°C junction temperature.
Feedback Reference Voltage	815mV ±8mV - enables precise 0.8V–0.9×VIN output regulation with <1% error over temperature.
Switching Frequency Range	200kHz to 1MHz - externally adjustable via resistor on FREQ pin for EMI optimization and size trade-offs.
HS/LS MOSFET R_DS(on)	40mΩ / 20mΩ - minimizes conduction loss and enables >92% peak efficiency at mid-load.
Thermal Shutdown Threshold	175°C with 45°C hysteresis - ensures safe recovery after overload without manual reset.
PGOOD Delay	700μs typical - provides deterministic power sequencing timing for downstream logic and processors.

Pinout & Package

MP4470AGL-Z is housed in a thermally enhanced 3mm × 4mm, 20-pin QFN package with exposed thermal pads (pins 8,19,21–23 for IN; 9,10,17,18,24,25 for SW; 11–16 for PGND) enabling efficient PCB heat dissipation (θJC = 10°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 (AGND)	Analog Ground Reference	Separate ground for feedback and bias circuitry to prevent noise coupling into regulation loop.
2 (FREQ)	Frequency Set Input	Resistor-to-ground sets ON-time and thus switching frequency; enables EMI tuning without changing inductor.
3 (FB)	Output Voltage Feedback Sense	High-impedance input (10–50nA) monitors resistor divider ratio to regulate VOUT with 1% reference accuracy.
4 (SS)	Soft-Start Control	Internal 8.5μA current source charges external capacitor to ramp output voltage smoothly and avoid inrush current.
5 (EN)	Enable Input with Pull-Down	1.25V threshold with 390mV hysteresis; internal 1MΩ pull-down allows auto-start with 100kΩ to VIN.
6 (PGOOD)	Open-Drain Power-Good Flag	Asserts HIGH when VFB ≥ 90% VREF, with ~700μs delay - used for system power sequencing and fault detection.
7 (BST)	Bootstrap Supply Node	Connects 0.1–1μF capacitor to SW to generate floating gate drive for high-side MOSFET; supports low-duty-cycle operation.
8,19,21–23 (IN)	Main Input Power Rail	High-current input pins with dedicated thermal pads - require wide copper pours and multiple vias for low-impedance path.
9,10,17,18,24,25 (SW)	Power Switch Node	Switching node connecting internal HS/LS MOSFETs - demands short, low-inductance routing to minimize ringing and EMI.
11–16 (PGND)	Power Ground Return	Primary return path for inductor current and output capacitor - must be solid plane tied to AGND at single point.
20 (VCC)	Internal Bias Regulator Output	5V ±1% regulated supply for gate drivers and control logic; requires local 1μF ceramic decoupling.

Key Features

Feature	Design Value
Proprietary Switching-Loss-Reduction Technology	Optimizes gate drive timing and dead time to reduce turn-on/turn-off losses without external compensation.
Low-Dropout Mode with Bootstrap Refresh	Enables operation down to V_OUT ≈ V_IN − 0.5V by actively recharging BST capacitor during light-load cycles.
Programmable Soft-Start Time	Adjustable via external SS capacitor (e.g., 10nF → ~1.2ms ramp) to prevent output overshoot and inrush stress.
Integrated Protection Suite	Includes SCP, OCP, UVP, thermal shutdown - no external components needed for full fault coverage except PGOOD pull-up.
Fast Transient Response	Maintains <±2% output deviation under 1A/μs load steps due to high-bandwidth current-mode control and low R_DS(on).

Applications

Automotive Infotainment

Notebook I/O Power

Use Scenario: Powering display interface ICs and USB-C PD controllers in vehicle head units with 9V–16V battery input.

IC Role / Device Role / Timing Role: Primary 3.3V/5V POL regulator delivering stable, low-noise power with PGOOD sequencing for SoC initialization.

Use Value: Eliminates need for external OVP latch (not required in infotainment), leverages 36V max input for load-dump tolerance, and uses QFN thermal pads for convection-cooled dash mounting.

Use Scenario: Generating 1.8V core voltage for PCIe switch controllers in ultrabook docking stations.

IC Role / Device Role / Timing Role: Secondary buck converter operating from 12V intermediate rail, synchronized via FREQ pin to avoid beat frequencies.

Use Value: Achieves >90% efficiency at 2A load with 10μH inductor and ceramic output caps; soft-start prevents brownout during hot-plug events.

Industrial PLC I/O Modules

Optical Transceiver Power

Use Scenario: Providing isolated 5V supply for digital I/O isolators and ADC front-ends in DIN-rail mounted controllers.

IC Role / Device Role / Timing Role: Main 5A-capable DC/DC stage converting 24V field bus to clean 5V, with PGOOD confirming regulation before enabling isolation barrier.

Use Value: Wide 4.5–36V input accommodates brownout and surge conditions; thermal shutdown protects against enclosure overheating in sealed enclosures.

Use Scenario: Biasing SFP+ and QSFP transceivers requiring tightly regulated 3.3V with fast transient response to burst data traffic.

IC Role / Device Role / Timing Role: Point-of-load regulator placed adjacent to transceiver cage, using skip mode to maintain >85% efficiency at standby current (<100mA).

Use Value: Programmable frequency avoids interference with 10G Ethernet clock harmonics; 1% VREF ensures compliance with SFF-8472 voltage margin requirements.

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
MP4470GL-Z	Includes OVP latch function; otherwise identical pinout, specs, and package.	Required where output overvoltage must force hard shutdown (e.g., safety-critical sensor supplies).	Select MP4470GL-Z only if OVP latch is mandated; MP4470AGL-Z reduces risk of spurious latch events in noisy environments.
TPS54560QDGQRQ1	Lower 4.5–60V input range; 5.5A rating; external MOSFETs; no integrated BST diode.	Suitable for higher-input automotive systems (e.g., 48V mild-hybrid), but requires more BOM components and layout area.	Choose TPS54560Q1 only when >36V input or AEC-Q100 Grade 1 qualification is mandatory; MP4470AGL-Z offers smaller footprint and lower component count.

Compared with MP4470GL-Z, MP4470AGL-Z trades OVP latch for improved reliability in electrically noisy automotive domains; versus TPS54560Q1, it delivers superior integration and thermal performance in space-constrained 24V industrial designs.

Availability

MP4470AGL-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, notebook I/O power rails, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP4470AGL-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 design centers across Asia and North America.

The MP4470/4470A product line targets high-density, high-efficiency DC/DC conversion in automotive, industrial, and computing applications where small QFN packages, wide input ranges, and fast transient response are critical.

FAQ

What is the difference between MP4470AGL-Z and MP4470GL-Z?

MP4470AGL-Z lacks the output over-voltage latch (OVP latch) protection present in MP4470GL-Z. Both share identical pinout, package, input/output specifications, thermal shutdown, and all other protections (SCP, OCP, UVP, etc.). The 'A' suffix denotes this functional omission, making MP4470AGL-Z preferable in applications where false OVP triggers could disrupt operation.

Can MP4470AGL-Z operate with ceramic output capacitors?

Yes, but external ramp compensation (R4/C4 network) is required for stability with low-ESR ceramic capacitors. The datasheet specifies ramp design equations and recommends C4 values between 390pF–560pF depending on switching frequency. Without ramp, ceramic outputs may cause subharmonic oscillation or jitter in PWM mode.

What is the minimum recommended input capacitance for MP4470AGL-Z at 5A load?

For a 5A load with 24V input and 3.3V output, the RMS input ripple current is ~3.5A. A minimum 47μF X7R ceramic capacitor rated for ≥4A RMS and ≥35V DC is recommended, placed within 3mm of the IN and PGND pins using ≥4 thermal vias to each pad.

How does the bootstrap refresh function enable low-dropout operation?

When duty cycle approaches 100%, the BST capacitor discharges due to insufficient SW-to-VIN voltage differential. The internal UVLO circuit detects V_BST−V_SW < 2.3V and forces LS-FET conduction to recharge BST via VIN→BST→SW path. This allows sustained operation down to V_OUT ≈ V_IN − 0.5V without external charge pump.

Is MP4470AGL-Z qualified for automotive applications?

MP4470AGL-Z is not AEC-Q200 qualified. While it meets automotive voltage ranges (4.5V–36V) and operates from −40°C to +125°C junction temperature, it lacks formal automotive qualification. For AEC-Q100 Grade 2 or 1 applications, consider MPS's automotive-grade variants like MPQ4470A-AEC1.

What is the purpose of the exposed thermal pads (pins 8,19,21–23 and 9,10,17,18,24,25)?

These exposed pads form the primary thermal and electrical connection paths for IN and SW nodes. They must be soldered to large copper planes with ≥6 thermal vias per pad to achieve the specified θJA = 48°C/W and sustain 5A continuous current without exceeding 125°C junction temperature at +85°C ambient.

Does MP4470AGL-Z support synchronization to an external clock?

No, MP4470AGL-Z does not support external clock synchronization. Its switching frequency is set solely by the resistor on the FREQ pin and input voltage feed-forward. For synchronizable alternatives, consider MPS MPQ4470A or TI TPS54560Q1, which offer SYNC pin functionality.

MP4470AGL-Z 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:: 200kHz ~ 1MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

MP4470AGL-Z FAQ

1.How can I place an order for MP4470AGL-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP4470AGL-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 MP4470AGL-Z reliable?

The price and inventory of MP4470AGL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4470AGL-Z is usually 5 days.

3.What payment methods are accepted for MP4470AGL-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4470AGL-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP4470AGL-Z?

MP4470AGL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP4470AGL-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 MP4470AGL-Z?

For technical support, including MP4470AGL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4470AGL-Z requirements.

6.How does Aetrix verify that MP4470AGL-Z is sourced from the original manufacturer or authorized distributors?

All MP4470AGL-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 MP4470AGL-Z meets industry standards.

7.What is the process for return or replacement of MP4470AGL-Z?

All MP4470AGL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4470AGL-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 MP4470AGL-Z part is unused and in its original packaging.

Return procedure for MP4470AGL-Z:

1.Submit a request within 90 days.

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

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