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

Monolithic Power Systems Inc. MPQ9842GLE-5-AEC1-Z

Name: MPQ9842GLE-5-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ9842GLE-5-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ9842GLE-5-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 16-VQFN

Datasheet:: MPQ9842GLE-5-AEC1-Z.pdf

Description:: IC REG BUCK 5V 2A 16QFN

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Product details

Overview

MPQ9842GLE-5-AEC1-Z from Monolithic Power Systems is a 36V, 2A, AEC-Q100 Grade-1 qualified synchronous step-down converter with fixed 5V output, integrated 125mΩ high-side and 55mΩ low-side MOSFETs, 14μA no-load quiescent current, and programmable 350kHz–2.5MHz switching frequency. It delivers stable power in automotive infotainment head units requiring wide-input, low-I_Q, and EMI-compliant DC/DC conversion.

For engineers reviewing the MPQ9842GLE-5-AEC1-Z datasheet, MPQ9842GLE-5-AEC1-Z pinout, MPQ9842GLE-5-AEC1-Z application, or MPQ9842GLE-5-AEC1-Z equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade protection features (OCP, SCP, thermal shutdown), and real-world design meaning for each key specification - all extracted from the official MPQ9842 Rev. 1.1 datasheet.

Technical Context

The MPQ9842GLE-5-AEC1-Z uses peak-current-mode control with internal error amplifier and 0.8V reference to regulate fixed 5V output across 3.3V–36V input. Its PLL-based oscillator enables precise frequency synchronization and supports both forced CCM (via SYNC high) and Advanced Asynchronous Mode (AAM) for light-load efficiency optimization.

It integrates BST refresh circuitry enabling >95% duty cycle operation, employs hiccup-mode over-current protection, and delivers power-good signaling with ±10% window (PG rising at 90% V_REF, falling at 84% V_REF). The wettable flank QFN-16 package supports automated optical inspection in automotive PCB assembly.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.3V to 36V - supports direct connection to automotive battery rail including cold-crank (4.5V) and load-dump (36V) transients.
Output Voltage	Fixed 5.000V ±2.5% - eliminates external feedback resistors; accuracy maintained over -40°C to +125°C junction temperature.
Continuous Output Current	2A - sustained delivery without derating up to +125°C T_J on standard 4-layer EVB with θ_JA = 43°C/W.
No-Load Quiescent Current	14μA - enables >1-year battery standby in always-on automotive modules (e.g., CAN gateway wake-up circuits).
Switching Frequency Range	350kHz to 2.5MHz - allows EMI-sensitive placement (e.g., near RF receivers) and inductor size reduction (e.g., 4.7μH at 2.2MHz).
Protection Features	Hiccup OCP, short-circuit protection, thermal shutdown at 170°C, and UVLO with 2.8V rising threshold - ensures fail-safe operation during fault conditions in ASIL-B systems.
Package	QFN-16 (3mm × 4mm) with wettable flanks - enables solder-joint inspection per IPC-A-610 Class 3 and meets AEC-Q100 mechanical stress requirements.

Pinout & Package

The MPQ9842GLE-5-AEC1-Z is housed in a thermally enhanced, wettable flank QFN-16 (3mm × 4mm) package with exposed thermal pad. Pin 1 is marked by a dot; pins are numbered counter-clockwise. PGND (pins 4 & 9) and SW (pins 3 & 10) are internally paralleled for low-inductance power routing.

Pin/Terminal	Circuit Role	Design Meaning
1 PHASE	Synchronization phase select	Configures 0° or 180° phase alignment with external SYNC clock; tie to GND if unused to prevent floating.
2 VIN	Main power input	Accepts full 3.3V–36V range; requires local 10μF ceramic decoupling to minimize switching noise injection.
3,10 SW	Power switch node	High-frequency switching node connecting internal HS/LS MOSFETs; must be routed with minimal loop area to reduce EMI.
4,9 PGND	Power ground return	Low-impedance return path for power MOSFETs; requires dedicated copper pour and multiple vias to thermal pad.
5 EN	Enable control	Digital input with 1.05V threshold; drives device into 2μA shutdown when pulled low; must not float.
6 SYNC	Frequency sync & mode control	Accepts 350kHz–2.5MHz external clock; logic level selects CCM (high) or AAM (low) before startup.
7 PG	Power good indicator	Open-drain output asserting when V_OUT is within ±10% of 5V; requires external pull-up for system monitoring.
8 BIAS	Efficiency-boost bias supply	Accepts 5V–18V external bias to reduce internal regulator loss; improves full-load efficiency by ~1.2% at 12V_IN.
11 BST	Bootstrap supply	Charges via internal regulator; requires 0.1μF–1μF ceramic capacitor to SW for HS-FET gate drive.
12 VCC	Internal bias rail	5V regulated output powering control logic; requires ≥1μF local decoupling to AGND.
13 AGND	Analog ground reference	Separate ground for FB, SS, and error amplifier; must be connected to PGND at single point near IC.
14 SS	Soft-start timing	Current-source input (10μA) setting ramp time; external capacitor determines inrush current limiting duration.
15 FB	Feedback input	Internally tied to 5V output in fixed-version; no external resistor divider required - simplifies layout and improves stability.
16 FREQ	Frequency programming	Resistor-to-ground sets switching frequency (e.g., 82kΩ → 1MHz); enables precise EMI band placement.

Key Features

Feature	Design Value
AEC-Q100 Grade-1 qualification	Validated for operation from −40°C to +125°C T_J; includes HTOL, TC, and ESD testing per automotive reliability standards.
Wettable flank QFN-16 package	Enables automated AOI of solder joints on bottom leads - critical for zero-defect automotive manufacturing traceability.
Advanced Asynchronous Mode (AAM)	Reduces light-load quiescent current to 14μA while maintaining regulation; eliminates audible coil whine in infotainment systems.
80ns minimum on-time	Supports high-duty-cycle operation (e.g., 5V out from 6V_IN) without pulse-skipping; maintains regulation down to 1.2V_IN dropout.
Integrated 125mΩ/55mΩ MOSFETs	Eliminates external power stage; achieves >92% efficiency at 1A/12V_IN→5V_OUT without heatsink.
CISPR25 Class 5 EMI compliance	Passes conducted/radiated emissions limits up to 1GHz with standard EMI filter - reduces system-level EMC debug time.

Applications

Automotive Infotainment Head Unit

ADAS Camera Power Supply

Use Scenario: Powers SoC, display interface, and audio codec in 12V-battery-powered vehicle head units with start-stop capability.

IC Role / Device Role / Timing Role: Primary 5V buck converter delivering 2A continuous current; regulates against battery transients (4.5V–16V) and load-dump spikes.

Use Value: 14μA quiescent current extends battery life during ignition-off sleep; AAM mode prevents coil noise during silent UI states.

Use Scenario: Supplies image sensor and ISP in rear-view or surround-view cameras mounted in exterior housings.

IC Role / Device Role / Timing Role: Fixed-output DC/DC providing clean, ripple-free 5V to CMOS image sensors requiring <10mV p-p noise.

Use Value: Integrated MOSFETs and optimized layout reduce component count; wettable flank package ensures solder joint reliability under thermal cycling.

Automotive Telematics Control Unit (TCU)

Industrial Vehicle Telematics Gateway

Use Scenario: Powers LTE modem, GNSS receiver, and microcontroller in cellular-connected vehicle tracking modules.

IC Role / Device Role / Timing Role: Input-stage regulator converting 12V/24V vehicle bus to stable 5V for communication subsystems.

Use Value: 36V absolute max rating withstands ISO 7637-2 pulse 5a (300ms, 35V); PG signal enables firmware-controlled power sequencing.

Use Scenario: Provides isolated 5V rail for CAN FD transceivers and microcontrollers in off-highway equipment telematics nodes.

IC Role / Device Role / Timing Role: High-reliability DC/DC converter operating continuously in extended temperature (-40°C to +105°C ambient) environments.

Use Value: AEC-Q100 qualification ensures long-term parametric stability; QFN thermal pad enables conduction 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
TPS54360BQPWPRQ1	4.5V–60V input, 3.5A output, 14μA I_Q, but no wettable flanks and only AEC-Q100 Grade-2 (−40°C to +105°C).	Higher voltage capability suits 48V mild-hybrid systems; lower temp grade limits use in engine bay proximity.	Select when input exceeds 36V or higher current (>2A) is needed; verify thermal performance at +125°C.
LM61480QRNXTQ1	3V–36V input, 8A output, 15μA I_Q, QFN-16 with wettable flanks, but larger 4mm×4mm footprint and no fixed-5V variant.	Requires external feedback resistors; better suited for scalable multi-rail designs where adjustable output is preferred.	Select when future design flexibility (e.g., 3.3V/5V/12V variants) or higher current headroom is required.

Compared with TPS54360BQPWPRQ1 and LM61480QRNXTQ1, the MPQ9842GLE-5-AEC1-Z offers optimal integration for cost-sensitive 5V automotive modules: fixed output eliminates resistor tolerance errors, wettable flanks ensure production yield, and Grade-1 qualification guarantees operation at full 125°C junction temperature without derating.

Availability

MPQ9842GLE-5-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for MPQ9842GLE-5-AEC1-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 MPQ9842 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for ASIL-B compatible power rails in infotainment, body electronics, and ADAS subsystems - emphasizing low quiescent current, robust transient response, and AEC-Q100 reliability.

FAQ

What is the purpose of the BIAS pin on the MPQ9842GLE-5-AEC1-Z?

The BIAS pin accepts an external 5V–18V supply to power the internal control circuitry, bypassing the VIN-regulated VCC rail. This reduces power dissipation inside the IC, improving full-load efficiency by up to 1.2% and lowering die temperature - especially beneficial in high-ambient automotive applications where thermal headroom is limited.

Can the MPQ9842GLE-5-AEC1-Z operate with input voltage below 5V?

Yes - the MPQ9842GLE-5-AEC1-Z operates down to 3.3V input. Its internal 5V regulator remains functional at VIN ≥ 5V; below that, VCC degrades linearly but the device continues regulating 5V output until VIN drops below the under-voltage lockout threshold of 2.8V (rising). This supports cold-crank scenarios in 12V systems.

How does the PHASE pin affect synchronization in multi-phase designs?

The PHASE pin selects whether the internal switching node aligns in-phase (PHASE = high) or 180° out-of-phase (PHASE = low) with the external SYNC clock. In dual-MPQ9842 configurations, tying one device's PHASE to VIN and the other's to GND enables interleaved operation, reducing input/output ripple and spreading EMI energy across two frequencies.

Is external compensation required for the MPQ9842GLE-5-AEC1-Z?

No - the MPQ9842GLE-5-AEC1-Z features an optimized internal compensation network tailored for its fixed 5V output and integrated MOSFETs. No external Type-II or Type-III compensation components are needed, simplifying layout and eliminating tuning effort while ensuring stability across all operating conditions.

What is the function of the BST refresh feature during dropout operation?

BST refresh actively monitors the BST-to-SW voltage and forces the low-side MOSFET on when it falls below 2.5V, recharging the bootstrap capacitor. This enables >95% duty cycle operation - critical for maintaining regulation when input voltage approaches output (e.g., 5.5V_IN → 5V_OUT) - without requiring external charge pumps or auxiliary supplies.

Does the MPQ9842GLE-5-AEC1-Z support spread-spectrum frequency modulation?

No - the MPQ9842GLE-5-AEC1-Z does not implement spread-spectrum modulation. However, its programmable 350kHz–2.5MHz frequency range and ability to synchronize to external clocks allow designers to place switching noise outside sensitive bands (e.g., AM radio, CAN FD), achieving CISPR25 Class 5 compliance using passive filtering alone.

How is power-good (PG) timing validated in automotive systems?

The PG signal asserts when V_OUT reaches 90% of 5V (4.5V) and deasserts at 84% (4.2V), with 30μs deglitching on rise and 50μs on fall. This hysteresis and timing ensure reliable sequencing with microcontrollers having slow wake-up comparators, preventing false resets during output settling or transient recovery.

MPQ9842GLE-5-AEC1-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: MPQ

Package/Case:: 16-VQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 3.3V

Voltage - Input (Max):: 36V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 2A

Frequency - Switching:: 350kHz ~ 2.5MHz

Synchronous Rectifier:: Yes

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount, Wettable Flank

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

MPQ9842GLE-5-AEC1-Z FAQ

1.How can I place an order for MPQ9842GLE-5-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ9842GLE-5-AEC1-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 MPQ9842GLE-5-AEC1-Z reliable?

The price and inventory of MPQ9842GLE-5-AEC1-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ9842GLE-5-AEC1-Z is usually 5 days.

3.What payment methods are accepted for MPQ9842GLE-5-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9842GLE-5-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ9842GLE-5-AEC1-Z?

MPQ9842GLE-5-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ9842GLE-5-AEC1-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 MPQ9842GLE-5-AEC1-Z?

For technical support, including MPQ9842GLE-5-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9842GLE-5-AEC1-Z requirements.

6.How does Aetrix verify that MPQ9842GLE-5-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ9842GLE-5-AEC1-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 MPQ9842GLE-5-AEC1-Z meets industry standards.

7.What is the process for return or replacement of MPQ9842GLE-5-AEC1-Z?

All MPQ9842GLE-5-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9842GLE-5-AEC1-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 MPQ9842GLE-5-AEC1-Z part is unused and in its original packaging.

Return procedure for MPQ9842GLE-5-AEC1-Z:

1.Submit a request within 90 days.

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

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