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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Monolithic Power Systems Inc. MPQ4253BGU-AEC1-Z

Name: MPQ4253BGU-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ4253BGU-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4253BGU-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Special Purpose Regulators

Package:: 26-PowerVFQFN

Datasheet:: MPQ4253BGU-AEC1-Z.pdf

Description:: 36V, STEP-DOWN CONVERTER SUPPORT

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Product details

Overview

MPQ4253BGU-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, monolithic 36V synchronous buck converter with integrated dual USB power switches and protocol identification logic - supporting one USB Type-C (5V @ 3A DFP) and one USB Type-A (BC1.2/Apple Divider 3/1.2V–1.2V) port. It delivers up to 6A continuous output current, operates from 6V–36V input, features 5.17V default output voltage, and passes Apple MFi certification for automotive and infotainment charging applications.

For engineers reviewing the MPQ4253BGU-AEC1-Z datasheet, MPQ4253BGU-AEC1-Z pinout, MPQ4253BGU-AEC1-Z application, or MPQ4253BGU-AEC1-Z equivalent, key selection considerations include its dual-protocol USB auto-detection behavior, load-shedding mode (Type-C current downgrades to 1.5A when Type-A detects a device), integrated 18mΩ/15mΩ buck MOSFETs, QFN-26 (5mm×5mm) AEC-Q100 package, and FSS-enabled 480kHz switching frequency.

Technical Context

The MPQ4253BGU-AEC1-Z implements peak-current-mode control with internal 4.6V VCC LDO, programmable output voltage (5.1V/5.17V/5.3V), and automatic PFM/PWM transition at light load. Its USB Type-C port uses CC1/CC2 pins for connection detection and VCONN sourcing, while USB Type-A port employs DP2/DM2 for BC1.2 DCP, Apple Divider 3, and 1.2V/1.2V handshake without external components.

It integrates dual independent current-limit switches (18mΩ R_DS(ON) each), ISENS± sensing for USB2-triggered load shedding, and full protection including hiccup-mode OCP, 5.9V OVP, and thermal shutdown at 165°C. The FREQ pin supports 250kHz–1MHz adjustable switching frequency with optional ±10% frequency spread spectrum.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	6V to 36V - supports 12V/24V automotive battery rails with 4.6V UVLO hysteresis.
Output Voltage	5.17V (typical, OUT_SEL floating) - factory-trimmed for USB compliance; ±1% over -40°C to +125°C.
Max Output Current	6A - sustained buck output current with integrated 18mΩ HS/15mΩ LS MOSFETs and thermal derating.
USB1 Current Limit	3A (Type-C DFP mode) - accurate current limiting with automatic downgrade to 1.5A upon USB2 plug-in detection.
USB2 Current Limit	3A (Type-A BC1.2/Apple modes) - supports DCP, Apple Divider 3, and 1.2V/1.2V without host controller interaction.
Switching Frequency	480kHz with FSS (FREQ floating) - reduces EMI peaks via ±10% triangle modulation; adjustable down to 250kHz or up to 1MHz.
Package	QFN-26 (5mm × 5mm, 0.5mm pitch) - AEC-Q100 Grade 1 qualified, θ_JA = 26°C/W on 4-layer EVB.

Pinout & Package

MPQ4253BGU-AEC1-Z is housed in a thermally enhanced QFN-26 (5mm × 5mm) package with exposed thermal pad (PGND-connected). Pin 1 is marked by a dot; top-side marking includes "MP4253B" prefix, year/week code, and lot number. Layout requires tight coupling of PGND/AGND, low-inductance SW/BST routing, and 220nF VCC decoupling adjacent to pin 7.

Pin/Terminal	Circuit Role	Design Meaning
1, 24 (CC1, CC2)	USB Type-C configuration channel	Detect plug orientation, initiate VCONN sourcing, and trigger load-shedding when USB2 is active.
2 (USB1), 16 (USB2)	USB power outputs	Direct 5V outputs with integrated 18mΩ switches; USB1 supports 3A DFP, USB2 supports BC1.2/Apple protocols.
3, 15, 25 (OUT)	Buck output node	Primary regulated 5.17V rail feeding both USB ports; connects to output capacitor bank and inductor.
4, 14 (VIN)	Main input supply	6V–36V input; requires local 100µF+ low-ESR bulk capacitance and 10µF ceramic near pins.
5, 13 (PGND)	Power ground return	High-current return path for buck switch node and USB switches; must be solid copper plane with multiple vias.
6 (AGND)	Analog reference ground	Reference for error amplifier, current sense, and USB data lines; tied to PGND at single point.
7 (VCC)	Internal LDO output	4.6V regulated supply for gate drivers and logic; requires 220nF ceramic decoupling and external startup circuit.
8, 9, 26 (SW)	Switch node	Drain of HS-FET and source of LS-FET; high di/dt node requiring wide copper trace and minimal loop area.
10 (BST)	Bootstrap supply	Connects to SW via 0.22µF capacitor to generate gate drive voltage for HS-FET.
11 (OUT_SEL)	VOUT programming	Pull low → 5.1V; float → 5.17V; pull high → 5.3V - enables fine-tuning for cable drop compensation.
12 (FREQ)	Frequency control	Floating → 480kHz + FSS; grounded → 250kHz; resistor-to-ground → 250–1000kHz linear adjustment.
17, 18 (ISENS+, ISENS−)	USB2 current sense	Monitor USB2 load to trigger automatic USB1 current downgrade from 3A to 1.5A during dual-port operation.
19, 20 (DM2, DP2)	Type-A data lines	Implement BC1.2 DCP short, Apple Divider 3 (2.7V), and 1.2V/1.2V handshake autonomously.
21 (EN)	Enable control	Active-high logic input; clamped at 7.6V; must be pulled high via ≥100kΩ resistor to avoid floating.
22, 23 (DP1, DM1)	Type-C data lines	Support USB PD sink communication and legacy enumeration; used only in non-PD Type-C DFP mode.

Key Features

Feature	Design Value
All-in-one dual-USB architecture	Integrates buck converter, two current-limited USB switches, and protocol identification logic - eliminates external USB controllers and discrete switches.
Apple MFi-certified Type-C operation	Passes MFi test suite for 5V@3A DFP mode with automatic CCx detection, VCONN sourcing, and load-shedding coordination.
Auto-load-shedding logic	When USB2 detects a connected device, ISENS± triggers immediate USB1 current limit reduction from 3A to 1.5A - prevents overcurrent on shared buck rail.
Programmable line-drop compensation	90mV compensation at 2.4A ensures stable 5V delivery at USB connector despite PCB trace resistance.
AEC-Q100 Grade 1 qualification	Rated for −40°C to +125°C junction temperature with 165°C thermal shutdown and 20°C hysteresis - suitable for under-hood automotive modules.

Applications

Automotive Infotainment Charging Hub

Telematics Control Unit (TCU) Power Module

Use Scenario: Dual-port USB charging in center console or rear-seat entertainment system with 12V/24V battery input.

IC Role / Device Role / Timing Role: Primary buck regulator and USB power manager - provides stable 5.17V rail and negotiates charging protocols independently per port.

Use Value: Eliminates need for separate USB controller IC and discrete power switches; meets AEC-Q100 requirements for vibration, temperature, and ESD robustness.

Use Scenario: Compact TCU module requiring reliable USB connectivity for firmware updates and diagnostic tools in commercial fleet vehicles.

IC Role / Device Role / Timing Role: Integrated USB power delivery and protocol handling - enables plug-and-play compatibility with iOS/Android devices without host CPU intervention.

Use Value: Reduces BOM count by 7+ components; supports Apple MFi certification out-of-box, accelerating time-to-market for certified telematics hardware.

Commercial Vehicle Cabin Gateway

ADAS Camera Power Interface

Use Scenario: Multi-function cabin gateway supplying power and data to dashcam, Wi-Fi hotspot, and driver-facing USB peripherals.

IC Role / Device Role / Timing Role: Dual-USB power source with autonomous BC1.2/Apple/Type-C detection - maintains charging during engine start transients (6V–36V input range).

Use Value: Withstands cold-crank (6V) and load-dump (36V) events; hiccup-mode OCP protects against shorted cables in harsh vehicle environments.

Use Scenario: Front-facing ADAS camera module requiring USB Type-C for high-speed video streaming and firmware updates.

IC Role / Device Role / Timing Role: Regulated 5.17V supply with precise current limiting and CCx-based cable detection - ensures safe hot-plug operation and stable VCONN sourcing.

Use Value: Enables direct USB-C interface without level shifters or protocol translators; 18mΩ R_DS(ON) minimizes heat rise in space-constrained camera housings.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-USB buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ4252BGU-AEC1-Z	Single USB Type-A port only; no Type-C CC logic or VCONN support; same 6A buck, 5.17V output, and AEC-Q100 Grade 1 rating.	Lacks USB Type-C functionality - unsuitable where reversible connector or MFi compliance is required.	Select when only legacy Type-A charging is needed and cost reduction is prioritized over Type-C feature set.
NCP81239MNTXG	36V buck with dual USB switches but no integrated BC1.2/Apple/Type-C protocol logic; requires external microcontroller for enumeration.	Needs external firmware and GPIO control for USB detection - increases design complexity and validation effort.	Choose only if custom protocol handling is already implemented and flexibility to support non-standard chargers is essential.

Compared with MPQ4252BGU-AEC1-Z, the MPQ4253BGU-AEC1-Z adds full Type-C DFP capability and MFi certification at minimal footprint cost; versus NCP81239MNTXG, it delivers turnkey USB protocol handling without MCU dependency - reducing development time and qualification risk for automotive USB hubs.

Availability

MPQ4253BGU-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, telematics control units, and commercial vehicle cabin gateways requiring stable component supply with AEC-Q100 compliance, Apple MFi certification, and dual-USB charging capability.

Supply support for MPQ4253BGU-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 power management ICs, with core expertise in DC/DC converters, motor drivers, and USB power delivery solutions.

The MPQ4253B product line targets automotive-grade USB charging applications, integrating buck regulation, dual-USB switching, and protocol identification into a single AEC-Q100-qualified device to simplify front-end power design in infotainment and telematics modules.

FAQ

What is the purpose of the ISENS+ and ISENS− pins?

ISENS+ and ISENS− monitor USB2 output current using an external sense resistor. When USB2 load exceeds threshold, they trigger automatic load shedding: USB1 current capability drops from 3A to 1.5A to prevent overloading the shared buck output rail. This behavior is fully autonomous and requires no host intervention.

How does the MPQ4253BGU-AEC1-Z achieve Apple MFi certification?

It passes Apple's MFi test suite for USB Type-C 5V@3A DFP mode through integrated CC1/CC2 detection, precise VCONN sourcing (0.75V–2.45V), detach threshold (2.75V), and strict timing control (10–20ms debounce). No external MFi authentication IC is needed - all logic is embedded in the silicon.

Can the output voltage be adjusted beyond the three factory-set options?

No - VOUT is fixed to 5.1V, 5.17V, or 5.3V via the OUT_SEL pin (low/floating/high). There is no external feedback resistor divider option. The 5.17V default is optimized for USB specification tolerance and line-drop compensation across typical automotive harness lengths.

What is the role of the external VCC startup circuit with R1 and D1?

R1 and D1 provide initial bias to VCC before the buck output ramps up. Since the internal VCC LDO requires VIN > 2.3V to activate, this circuit ensures reliable startup at low input voltages (e.g., cold-crank 6V) by delivering ~4.6V to pin 7 prior to VOUT stabilization.

Does the MPQ4253BGU-AEC1-Z support USB Power Delivery (USB-PD)?

No - it implements USB Type-C DFP mode only (5V@3A fixed), not full USB-PD negotiation. CC1/CC2 pins handle basic attachment detection and VCONN, but lack BMC signaling or PD controller logic. For variable-voltage PD, a companion PD controller (e.g., MPS MPQ4272) is required.

How is thermal performance validated for AEC-Q100 Grade 1 operation?

Thermal shutdown is guaranteed at 165°C with 20°C hysteresis. On the EVQ4253B-U-00A evaluation board (4-layer, 50mm×50mm), θ_JA = 26°C/W allows 6A operation at +85°C ambient. Derating curves in the datasheet confirm 125°C junction operation with appropriate copper area and airflow.

What happens when both USB ports are simultaneously loaded at 3A?

The buck converter sustains 6A total output, but USB1 automatically downgrades to 1.5A via load-shedding triggered by ISENS± when USB2 detects a device. Total delivered power remains within 6A limit, preserving reliability without external intervention or fault conditions.

MPQ4253BGU-AEC1-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 26-PowerVFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: -

Voltage - Input:: -

Number of Outputs:: -

Voltage - Output:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 26-QFN (5x5)

MPQ4253BGU-AEC1-Z FAQ

1.How can I place an order for MPQ4253BGU-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4253BGU-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 MPQ4253BGU-AEC1-Z reliable?

The price and inventory of MPQ4253BGU-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 MPQ4253BGU-AEC1-Z is usually 5 days.

3.What payment methods are accepted for MPQ4253BGU-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4253BGU-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4253BGU-AEC1-Z?

MPQ4253BGU-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4253BGU-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 MPQ4253BGU-AEC1-Z?

For technical support, including MPQ4253BGU-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4253BGU-AEC1-Z requirements.

6.How does Aetrix verify that MPQ4253BGU-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ4253BGU-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 MPQ4253BGU-AEC1-Z meets industry standards.

7.What is the process for return or replacement of MPQ4253BGU-AEC1-Z?

All MPQ4253BGU-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4253BGU-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 MPQ4253BGU-AEC1-Z part is unused and in its original packaging.

Return procedure for MPQ4253BGU-AEC1-Z:

1.Submit a request within 90 days.

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

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