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

Monolithic Power Systems Inc. MP4432GL-Z

Name: MP4432GL-Z
Brand: Monolithic Power Systems Inc.
SKU: MP4432GL-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP4432GL-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 16-PowerVQFN

Datasheet:: MP4432GL-Z.pdf

Description:: IC REG BUCK PROG 2.2A 16QFN

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Product details

Overview

MP4432GL-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter with integrated 90mΩ high-side and 40mΩ low-side MOSFETs, delivering up to 2.2A output current across a 3.3V–36V input range. It features programmable switching frequency (350kHz–2.5MHz), 10μA light-load quiescent current in AAM mode, and automotive-grade cold-crank support via low-dropout operation - used in infotainment power rails and ADAS camera modules.

For engineers reviewing the MP4432GL-Z datasheet, MP4432GL-Z pinout, MP4432GL-Z application, or MP4432GL-Z equivalent, key selection criteria include VIN range compatibility with 12V/24V automotive systems, valley-current OCP implementation for robust overload handling, thermal shutdown behavior at 170°C, and QFN-16 (3mm×4mm) layout constraints for high-density PCBs.

Technical Context

The MP4432 employs current-mode control with peak-current limiting and valley-current detection for cycle-by-cycle over-current protection. Its internal PLL-based oscillator supports precise external synchronization with selectable in-phase or 180° out-of-phase operation when multiple units are paralleled.

Advanced Asynchronous Mode (AAM) dynamically scales switching frequency under light load to reduce gate-driving and switching losses, while forced CCM mode maintains fixed-frequency operation for EMI-sensitive applications. The internal 5V VCC regulator can be bypassed via the BIAS pin using an external 5–18V supply to improve efficiency and thermal performance.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.3V to 36V - supports direct connection to automotive battery rails including cold-crank transients down to 3.3V.
Continuous Output Current	2.2A - sustained delivery with internal MOSFETs eliminating external power stage components.
Quiescent Current (AAM)	10μA - enables >1-year battery runtime in always-on vehicle telematics modules.
Switching Frequency Range	350kHz to 2.5MHz - programmable via resistor or external clock for EMI optimization and inductor size reduction.
Feedback Reference Voltage	0.8V ±2% - enables precise output regulation with standard resistor-divider networks.
Minimum On-Time	80ns - supports high step-down ratios (e.g., 24V→3.3V) at 2.5MHz without pulse-skipping.
Thermal Shutdown Threshold	170°C with 20°C hysteresis - ensures safe recovery after transient overloads without latch-off.
Power Good Accuracy	±10% window with 30μs rise / 50μs fall deglitch - provides reliable system-level power sequencing signals.

Pinout & Package

The MP4432GL-Z is housed in a thermally enhanced QFN-16 package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by a dot; pins are numbered counter-clockwise from top-left corner in top view.

Pin/Terminal	Circuit Role	Design Meaning
1 PHASE	Synchronization phase select	Drives high for in-phase, low for 180° out-of-phase sync with other MP4432 devices to reduce input ripple.
2 VIN	Main input supply	Accepts 3.3–36V; requires local ceramic decoupling to suppress switching noise on control circuitry.
3,10 SW	Switch node	Connects to inductor; carries high di/dt pulses - must minimize loop area for EMI control.
4,9 PGND	Power ground	High-current return path for MOSFETs; requires dedicated copper pour and multiple vias to thermal pad.
5 EN	Enable control	Logic-level input (0.9–1.2V threshold); pulls low to enter 1μA shutdown mode.
6 SYNC	Frequency sync/control	Accepts 350kHz–2.5MHz clock; also selects forced CCM (high) or AAM (low/floating) at startup.
7 PG	Open-drain power good	Indicates VOUT within ±10%; requires external pull-up to VCC or bias rail for system monitoring.
8 BIAS	External bias supply	Optional 5–18V input to power internal regulator - reduces dissipation and improves efficiency vs. VIN-only operation.
11 BST	Bootstrap supply	Drives high-side gate; requires 0.1–1μF capacitor between BST and SW for proper gate charging.
12 VCC	Internal bias rail	5V regulated output; requires ≥1μF ceramic cap close to pin for stable gate drive and control logic.
13 AGND	Analog ground	Reference for FB, SS, and error amplifier - must be isolated from PGND except at single-point star ground.
14 SS	Soft-start timing	10μA current source charges external capacitor; sets ramp time to limit inrush current during startup.
15 FB	Feedback input	Compares output voltage against 0.8V reference; connects to resistor divider - sensitive to noise and trace impedance.
16 FREQ	Frequency programming	Resistor-to-ground sets switching frequency; value calculated per R_FREQ = 170000 / f_SW(kHz).

Key Features

Feature	Design Value
Integrated Power Stage	90mΩ HS + 40mΩ LS MOSFETs eliminate external switches and reduce BOM count by 4+ components.
Low-Dropout Mode	Supports >95% duty cycle during cold-crank (VIN ↓ to 3.3V) while maintaining regulation - critical for automotive start-stop systems.
Hiccup-Mode OCP	Enters periodic restart on hard short - limits average fault current to <50mA and prevents thermal runaway.
Pre-Bias Start-Up	Blocks switching until SS voltage exceeds pre-existing VOUT - avoids reverse current into powered downstream circuits.
Valley-Current Detection	Monitors inductor current at zero-crossing to prevent sub-harmonic oscillation and ensure stable DCM operation.
BST Refresh Circuit	Automatically recharges bootstrap capacitor during low-duty cycles - sustains high-side gate drive even at 99% duty.

Applications

Automotive Infotainment

ADAS Camera Module

Use Scenario: Powering display controller, audio DSP, and USB hub in head-unit systems with 12V battery input.

IC Role / Device Role / Timing Role: Primary 3.3V/5V buck regulator supplying core logic and interface ICs; synchronized to system clock to avoid beat frequencies.

Use Value: 10μA AAM quiescent current extends battery backup runtime; 36V max input withstands load-dump transients.

Use Scenario: Generating clean 3.3V rail for CMOS image sensor and ISP in rear-view or surround-view cameras.

IC Role / Device Role / Timing Role: Point-of-load regulator with PG signal enabling sensor initialization only after stable VOUT.

Use Value: 80ns minimum on-time supports 24V→3.3V conversion at 2.5MHz, minimizing inductor size in space-constrained camera housings.

Industrial PLC I/O Module

Telematics Control Unit (TCU)

Use Scenario: Providing isolated 5V supply for digital I/O drivers and communication interfaces in DIN-rail mounted controllers.

IC Role / Device Role / Timing Role: Main DC/DC stage converting 24V field bus to logic rail; uses SYNC to align switching with CAN FD bit timing.

Use Value: Valley-current OCP prevents latch-up during inductive load switching; -40°C to +125°C rating meets industrial ambient requirements.

Use Scenario: Powering LTE modem, GNSS receiver, and microcontroller in always-connected vehicle tracking units.

IC Role / Device Role / Timing Role: Always-on buck converter with shutdown current <1μA - enables multi-year operation on supercapacitor or coin-cell backup.

Use Value: Low-IQ sleep mode extends battery life; BIAS pin allows efficient use of 3.3V LDO output to power VCC, reducing thermal load.

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
MPQ4432GQ-A	Automotive-grade AEC-Q100 qualified version; identical electrical specs but with extended temperature range (-40°C to +150°C) and enhanced ESD tolerance.	Required for safety-critical automotive ECUs where qualification is mandatory; not suitable for cost-sensitive consumer designs.	Select MPQ4432GQ-A when AEC-Q100 compliance is required; otherwise MP4432GL-Z offers same performance at lower cost.
LM61480RQR	TI part with 3.5A rating, 4.2V–36V input, and 12μA IQ; lacks programmable phase sync and has fixed 500kHz/2.1MHz options only.	Better suited for higher-current loads; no 180° phase-shift capability limits multi-phase input ripple reduction.	Choose LM61480RQR if >2.2A output or TI ecosystem preference dominates; MP4432GL-Z excels in multi-device sync and ultra-low IQ.

Compared with MPQ4432GQ-A, the MP4432GL-Z trades automotive qualification for lower unit cost and identical functional performance in non-automotive industrial or commercial settings; versus LM61480RQR, it delivers finer frequency granularity, true 180° phase control, and 2.2μA lower light-load IQ - critical for battery longevity in always-on edge nodes.

Availability

MP4432GL-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and industrial PLC I/O modules requiring stable component supply across extended temperature and input voltage ranges.

Supply support for MP4432GL-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 in the US, China, and Taiwan, and global manufacturing partnerships.

The MP4432 belongs to MPS's automotive-qualified DC/DC converter product line, engineered specifically for harsh-environment applications demanding wide VIN range, ultra-low quiescent current, and robust protection features.

FAQ

What is the maximum allowable input voltage for continuous operation?

The MP4432GL-Z supports continuous operation up to 36V input. Absolute maximum rating is 40V, but operation above 36V risks exceeding thermal limits and violating recommended operating conditions - sustained use beyond 36V is not advised even for transient events.

Can the MP4432GL-Z operate with no external soft-start capacitor?

No - the SS pin requires an external capacitor to set soft-start time and prevent inrush current. Leaving SS unconnected disables regulation; the internal 10μA current source needs a defined capacitance (e.g., 100nF for ~8ms ramp) to function correctly and avoid output overshoot.

How does the BIAS pin improve efficiency?

Connecting BIAS to a clean 5–18V supply (e.g., VOUT or separate LDO) bypasses the internal VIN-to-5V regulator, eliminating its conduction loss. This reduces total power dissipation by up to 15% at high input voltages and improves thermal margin - especially beneficial in sealed enclosures or high-ambient environments.

Is the MP4432GL-Z RoHS and REACH compliant?

Yes - all MP4432GL-Z units are lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. MPS publishes full material declarations and green status reports on its official website under Quality Assurance.

Does the device support pre-bias start-up, and how does it behave?

Yes - if VFB is already above the SS voltage at enable, the MP4432GL-Z holds both MOSFETs off until SS rises above VFB. This prevents reverse current flow into a pre-charged output, protecting downstream capacitors and ICs during hot-swap or multi-rail sequencing scenarios.

What is the purpose of the PHASE pin in multi-device configurations?

The PHASE pin configures synchronization phase between parallel MP4432GL-Z units sharing the same SYNC clock. Driving PHASE high yields in-phase switching; driving it low yields 180° out-of-phase operation - enabling interleaved operation that cuts total input RMS current by up to 30% and reduces required input capacitance.

How does hiccup-mode over-current protection differ from latch-off?

Hiccup mode disables the power stage, discharges the SS capacitor slowly, then retries full soft-start after discharge completes. Unlike latch-off, this avoids permanent shutdown during temporary shorts - allowing automatic recovery once fault clears, while limiting average fault current to safe thermal levels (<50mA typical).

MP4432GL-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 16-PowerVQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Programmable (Fixed)

Number of Outputs:: 1

Voltage - Input (Min):: 3.3V

Voltage - Input (Max):: 36V

Voltage - Output (Min/Fixed):: 3.3V, 3.8V, 5V

Voltage - Output (Max):: -

Current - Output:: 2.2A

Frequency - Switching:: 350kHz ~ 2.5MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QFN (3x4)

MP4432GL-Z FAQ

1.How can I place an order for MP4432GL-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP4432GL-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 MP4432GL-Z reliable?

The price and inventory of MP4432GL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4432GL-Z is usually 5 days.

3.What payment methods are accepted for MP4432GL-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4432GL-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP4432GL-Z?

MP4432GL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP4432GL-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 MP4432GL-Z?

For technical support, including MP4432GL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4432GL-Z requirements.

6.How does Aetrix verify that MP4432GL-Z is sourced from the original manufacturer or authorized distributors?

All MP4432GL-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 MP4432GL-Z meets industry standards.

7.What is the process for return or replacement of MP4432GL-Z?

All MP4432GL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4432GL-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 MP4432GL-Z part is unused and in its original packaging.

Return procedure for MP4432GL-Z:

1.Submit a request within 90 days.

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

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