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Monolithic Power Systems Inc. MPQ4253BGU-AEC1-P
- Part No.:
- MPQ4253BGU-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Special Purpose Regulators
- Package:
- 26-PowerVFQFN
- Datasheet:
-
MPQ4253BGU-AEC1-P.pdf
- Description:
- 36V, STEP-DOWN CONVERTER SUPPORT
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
MPQ4253BGU-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, monolithic 36V synchronous buck converter with integrated dual USB power switches (one Type-C DFP @ 3A, one Type-A DCP @ 3A), Apple MFI-certified charging port identification, and load-shedding capability. It delivers up to 6A continuous output current, supports 6V–36V input, provides selectable 5.1V/5.17V/5.3V VOUT, and operates in QFN-26 (5mm×5mm) package for automotive USB charging modules.
For engineers reviewing the MPQ4253BGU-AEC1-P datasheet, MPQ4253BGU-AEC1-P pinout, MPQ4253BGU-AEC1-P application, or MPQ4253BGU-AEC1-P equivalent, key selection criteria include its dual-USB protocol auto-detection (BC1.2, Apple Divider 3, 1.2V/1.2V, Type-C 5V@3A), integrated 18mΩ/15mΩ buck MOSFETs, 90mV line-drop compensation, hiccup-mode OCP, and thermal shutdown at 165°C - all validated for automotive cabin infotainment and telematics power systems.
Technical Context
The MPQ4253BGU-AEC1-P implements peak-current-mode control with fixed-frequency PWM (250kHz–1MHz) and automatic transition to PFM under light load. Its integrated Type-C CC1/CC2 detection logic enables VCONN sourcing and dynamic RP reconfiguration (56kΩ → 22kΩ) upon USB2 device insertion, triggering automatic USB1 current downgrade from 3A to 1.5A.
It embeds two independent current-sense amplifiers (ISENS±) for USB2 overcurrent detection, a dedicated 4.6V internal LDO for VCC biasing (with external startup path), and frequency spread spectrum (±10% at 480kHz) for EMI reduction. All protections - OVP (5.45–6.25V), UVLO (4.6–5.4V), thermal shutdown (165°C), and hiccup-mode OCP - are fully autonomous and do not require external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 36V - supports full automotive battery range including cold-crank (6V) and load-dump (36V) |
| Max Output Current | 6A continuous - sufficient to drive both USB ports simultaneously at full rated load |
| Buck MOSFET RDS(ON) | 18mΩ (HS) / 15mΩ (LS) - minimizes conduction loss and thermal rise at high current |
| USB Switch RDS(ON) | 18mΩ per channel - ensures <90mV voltage drop at 3A, meeting USB PD voltage tolerance |
| Line-Drop Compensation | 90mV at 2.4A - actively compensates for PCB trace IR drop to maintain ±1% VBUS accuracy |
| Switching Frequency | 480kHz default with FSS - balances efficiency, size, and EMI compliance without external resistor |
| OVP Threshold | 5.45V rising - protects connected devices from overvoltage during transient events |
| Thermal Shutdown | 165°C with 20°C hysteresis - prevents permanent damage while enabling safe recovery after cooling |
Pinout & Package
MPQ4253BGU-AEC1-P is housed in a thermally enhanced QFN-26 (5mm × 5mm, 0.5mm pitch) package with exposed thermal pad (PGND-connected) for automotive-grade thermal performance. Pin 1 is marked by dot; top-side marking includes "MP4253B" prefix and lot code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 (CC1, CC2) | USB Type-C configuration channel | Detects cable orientation, negotiates VCONN, and triggers RP reconfiguration when USB2 loads |
| 2 (USB1), 16 (USB2) | USB power outputs | Direct 5V outputs with integrated 18mΩ switches and independent current limiting |
| 3, 15, 25 (OUT) | Buck output node | Shared 5.17V supply rail feeding both USB switches and internal circuitry |
| 4, 14 (VIN) | Main input supply | Accepts 6–36V; powers internal LDO, gate drivers, and buck stage - requires local 100µF low-ESR input cap |
| 5, 13 (PGND) | Power ground return | High-current return path for buck switch node and USB outputs - must be solid copper plane with multiple vias |
| 6 (AGND) | Analog reference ground | Low-noise reference for error amp, current sense, and protection comparators - tied to PGND at single point |
| 7 (VCC) | Internal LDO output | 4.6V regulated supply for control logic; requires 220nF ceramic decoupling and external startup diode/resistor |
| 8, 9, 26 (SW) | Switch node | Drain of HS-FET and source of LS-FET - connects to inductor; demands wide copper trace and tight layout |
| 10 (BST) | Bootstrap capacitor connection | Forms floating supply for HS-FET driver via 0.22µF capacitor to SW - critical for reliable high-side turn-on |
| 11 (OUT_SEL) | VOUT programming input | Pull-low = 5.1V, float = 5.17V, pull-high = 5.3V - sets nominal USB bus voltage per OEM requirements |
| 12 (FREQ) | Switching frequency control | Floating = 480kHz + FSS; grounded = 250kHz; resistor-to-GND enables 250–1000kHz tuning |
| 17, 18 (ISENS+, ISENS−) | USB2 current-sense differential input | Monitors USB2 load to trigger USB1 current downgrade (3A→1.5A) and load-shedding mode |
| 19, 20 (DM2, DP2) | Type-A data lines | Implement BC1.2 DCP, Apple Divider 3, and 1.2V/1.2V handshake without external ICs |
| 21 (EN) | Enable control input | Active-high logic; must be driven - floating prohibited; clamped at 7.6V for robustness |
| 22, 23 (DP1, DM1) | Type-C data lines | Support USB 2.0 signaling and legacy device compatibility alongside CC detection |
Key Features
| Feature | Design Value |
|---|---|
| All-in-one Type-C + Type-A solution | Eliminates need for separate USB protocol ICs, reducing BOM count and PCB area by >40% vs discrete approach |
| Apple MFI certification support | Validated against Apple's proprietary charger handshake protocols - required for OEM integration in Apple-ecosystem vehicles |
| Auto-load-shedding on USB2 detection | Reduces USB1 advertised capability from 3A to 1.5A when USB2 is loaded - ensures total system current stays within 6A limit |
| Integrated 90mV line-drop compensation | Maintains ±0.5% VBUS accuracy across 0–3A load range despite PCB trace resistance up to 30mΩ |
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C junction temperature - suitable for under-dash and center-console mounting locations |
| Frequency spread spectrum (FSS) | Reduces peak EMI by >10dB at 480kHz fundamental - simplifies compliance with CISPR 25 Class 5 |
Applications
| Automotive Infotainment USB Hub | Telematics Control Unit (TCU) Charging |
|---|---|
Use Scenario: Dual-port USB charging module embedded in head unit or center console, powering smartphone navigation and accessory devices. IC Role / Device Role / Timing Role: Primary 5V power source and protocol manager for both USB Type-C (driver phone) and Type-A (passenger device) ports. Use Value: Delivers stable 5.17V ±1% at up to 6A total with automatic current sharing, eliminating need for external current-sharing resistors or protocol ICs. | Use Scenario: Integrated charging subsystem in vehicle telematics gateway, supporting firmware updates and diagnostics via USB. IC Role / Device Role / Timing Role: Synchronous buck regulator and USB power delivery controller that maintains VBUS integrity during CAN/LIN bus activity-induced transients. Use Value: Withstands 36V load-dump events and maintains USB enumeration through built-in UVLO hysteresis (700mV) and OVP clamping (5.8V). |
| ADAS Camera Module Power | Electric Vehicle (EV) Cabin Controller |
Use Scenario: Compact 5V supply for rear-view or surround-view camera modules requiring simultaneous USB data + power. IC Role / Device Role / Timing Role: Buck converter supplying clean 5V to camera sensor and USB PHY, with CC1/CC2 detection enabling VCONN for active cables. Use Value: Integrated 100mW VCONN sourcing eliminates need for external charge pump, reducing component count and failure points. | Use Scenario: Centralized USB charging for EV dashboard displays, wireless charging pads, and passenger entertainment interfaces. IC Role / Device Role / Timing Role: Dual-USB power manager coordinating load shedding between front/rear ports based on real-time current sensing. Use Value: Prevents fuse tripping during simultaneous high-power charging by dynamically downgrading Type-C port to 1.5A when Type-A is active. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-USB automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4252BGU-AEC1-P | Single USB port (Type-A only); no CC1/CC2, no Type-C support; same 6A buck, 36V input, AEC-Q100 Grade 1 | Lacks Type-C negotiation, VCONN, and Apple MFI - unsuitable for vehicles requiring modern smartphone compatibility | Select only if design uses Type-A exclusively and cost reduction outweighs future-proofing needs |
| TPS65987D-64RGER | USB-C PD controller + buck (not integrated); requires external 36V buck IC; supports USB PD 3.0, programmable VBUS up to 20V | Enables variable-output USB PD (e.g., 9V/15V), but adds complexity, BOM cost, and footprint vs single-chip solution | Choose only when USB PD programmability or >5V outputs are mandatory - not a drop-in replacement |
Compared with MPQ4252BGU-AEC1-P, the MPQ4253BGU-AEC1-P adds essential Type-C infrastructure and MFI compliance at minimal cost premium; versus TPS65987D, it trades PD flexibility for integration simplicity, lower EMI, and guaranteed automotive qualification out-of-box.
Availability
MPQ4253BGU-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment systems, telematics control units, ADAS camera modules, and EV cabin controllers requiring stable component supply with AEC-Q100 assurance and long-term production continuity.
Supply support for MPQ4253BGU-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 power management ICs, with over 20 years of expertise in DC/DC conversion, motor drivers, and USB power delivery solutions.
The MPQ4253B product line targets automotive-grade USB charging applications, integrating buck regulation, dual-USB protocol handling, and safety-critical protections into a single AEC-Q100-qualified package to simplify Tier-1 supplier designs.
FAQ
What is the purpose of the ISENS+ and ISENS− pins?
ISENS+ and ISENS− form a differential current-sense input for the USB2 port. They monitor USB2 output current via an external sense resistor; when current exceeds threshold, the IC automatically reduces USB1's advertised capability from 3A to 1.5A to prevent exceeding the 6A total output limit - enabling intelligent load shedding without host MCU intervention.
How does the MPQ4253BGU-AEC1-P achieve Apple MFI compliance?
It implements Apple's proprietary charger identification schemes - specifically Apple Divider 3 mode - using its integrated DP2/DM2 data lines and internal analog comparators. This allows direct handshake with iOS devices without external MFI authentication ICs, satisfying Apple's hardware-level certification requirements for vehicle-integrated chargers.
Can the output voltage be adjusted beyond the three factory-set values?
No. The OUT_SEL pin only supports three discrete VOUT settings: 5.1V (pulled low), 5.17V (floating), or 5.3V (pulled high). There is no external feedback resistor divider option; the internal reference and error amplifier are trimmed to these fixed points during production for automotive-grade stability and repeatability.
What is the role of the CC1 and CC2 pins in non-Type-C applications?
Even when only Type-A devices are connected, CC1/CC2 remain active for VCONN sourcing. After Type-C cable detection, they reconfigure to power the cable's electronic marker chip. If no Type-C device is present, they default to high-impedance state and do not interfere with Type-A operation or BC1.2 detection on DP2/DM2.
Is an external bootstrap capacitor required for reliable operation?
Yes. A 0.22µF X7R ceramic capacitor must be placed between BST and SW pins. This capacitor supplies gate-drive energy for the high-side MOSFET during each switching cycle. Omitting it causes HS-FET turn-on failure, leading to immediate buck regulation loss and potential thermal runaway.
How does the device handle input voltage transients common in automotive environments?
It withstands 40V absolute maximum input and incorporates 700mV UVLO hysteresis to prevent oscillation during slow battery recovery. Combined with 5.45–6.25V OVP clamping and thermal shutdown at 165°C, it meets ISO 7637-2 Pulse 5a (load dump) requirements when paired with appropriate input TVS and bulk capacitance.
Does the MPQ4253BGU-AEC1-P support USB Power Delivery (PD) negotiation?
No. It supports only fixed 5V USB charging modes: Type-C DFP (5V@3A), BC1.2 DCP, Apple Divider 3, and 1.2V/1.2V. It lacks the USB PD PHY, BMC decoder, and programmable VBUS capability required for PD 2.0/3.0 negotiation - making it ideal for cost-sensitive, fixed-voltage automotive USB hubs.
MPQ4253BGU-AEC1-P 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-P FAQ
1.How can I place an order for MPQ4253BGU-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4253BGU-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 MPQ4253BGU-AEC1-P reliable?
The price and inventory of MPQ4253BGU-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 MPQ4253BGU-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4253BGU-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4253BGU-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4253BGU-AEC1-P?
MPQ4253BGU-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4253BGU-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 MPQ4253BGU-AEC1-P?
For technical support, including MPQ4253BGU-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4253BGU-AEC1-P requirements.
6.How does Aetrix verify that MPQ4253BGU-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4253BGU-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 MPQ4253BGU-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4253BGU-AEC1-P?
All MPQ4253BGU-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4253BGU-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 MPQ4253BGU-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4253BGU-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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