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Monolithic Power Systems Inc. MEZS91202A
- Part No.:
- MEZS91202A
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 4-SIP Module
- Datasheet:
-
MEZS91202A.pdf
- Description:
- DC DC CONVERTER 5V
- Quantity:
- Payment:
- Shipping:
Inventory:2,076
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Product details
Overview
MEZS91202A from Monolithic Power Systems is a 36V, 2.5A USB charger module integrating MP2496M step-down converter in QFN-26 (4mm×4mm) package, delivering regulated 5V output with up to 95% efficiency across 7–36V input range, used in automotive USB power adapters and industrial docking stations.
For engineers reviewing the MEZS91202A datasheet, MEZS91202A pinout, MEZS91202A application, or MEZS91202A equivalent, key selection criteria include ±4% output voltage accuracy, hiccup-mode short-circuit protection, line drop compensation, 350kHz switching frequency, and -40°C to 85°C operating temperature range.
Technical Context
The MEZS91202A implements a synchronous buck topology using the MP2496M controller IC, supporting BC1.2 detection, divider mode, and 1.2V/1.2V mode for USB charging negotiation. It features integrated current sensing and thermal shutdown at 165°C.
Input line regulation is ±0.5% (typ.) at VIN = 24V; output ripple is 13mV (typ.) under 12V input and full load. Rise time from 10% to 90% VOUT is 1.6ms (typ.), and MTBF is calculated at 4185×10³ hrs per MIL-HDBK-217F.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7V to 36V continuous - supports 12V/24V automotive battery rails and industrial 24V systems without external pre-regulation. |
| Output Voltage | 5V ±4% (typ.) - meets USB specification for downstream port compliance and host device interoperability. |
| Max Output Current | 2.5A - sustains full-load operation with natural convection cooling on standard 2-layer PCBs. |
| Peak Efficiency | Up to 95% - minimizes thermal stress and enables compact enclosure designs in space-constrained applications. |
| Switching Frequency | 350kHz (typ.) - balances EMI performance and inductor size; compatible with standard low-DCR 6.5μH power inductors. |
| Short-Circuit Protection | Hiccup mode - limits fault energy during sustained overloads while enabling automatic recovery without manual reset. |
| Operating Temp | -40°C to +85°C - qualified for under-hood automotive and factory-floor industrial environments. |
Pinout & Package
Package: QFN-26 (4mm × 4mm, 0.5mm pitch), thermally enhanced with exposed thermal pad. Mounting requires solder paste stencil design per IPC-7351B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | VIN | Primary input power terminals - dual pins reduce trace resistance and improve current sharing for high-input-voltage operation. |
| 3, 4 | GND | Power ground return paths - must be connected directly to thermal pad and low-impedance ground plane for stable regulation and thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| USB Charging Compliance | Integrated DCP for BC1.2, divider mode, and 1.2V/1.2V handshake - eliminates need for external USB ID resistors or protocol ICs. |
| Line Drop Compensation | Active compensation across full load range - maintains 5V output within tolerance despite cable voltage drop in long-wire USB deployments. |
| Over-Temperature Protection | Thermal shutdown at 165°C with automatic restart - prevents permanent damage during transient overload or poor airflow conditions. |
| Open Design Files | Gerber files, BOM, and schematic available upon request - accelerates custom integration and regulatory certification (e.g., FCC/CE). |
| Natural Convection Operation | Rated for 2.5A output without forced air - reduces system cost and noise by eliminating fans or heatsinks in embedded enclosures. |
Applications
| Automotive USB Adapter | Industrial Docking Station |
|---|---|
Use Scenario: 12V/24V vehicle power outlet supplying dual-device charging via single USB-A port. IC Role / Device Role / Timing Role: Primary DC-DC regulator and USB power delivery controller with BC1.2 detection. Use Value: Maintains 5V ±4% under cold-crank (7V) and load-dump (36V) transients while supporting legacy smartphone charging protocols. | Use Scenario: Ruggedized tablet dock in factory automation requiring reliable 5V/2.5A USB power with wide-input tolerance. IC Role / Device Role / Timing Role: Standalone USB power module interfacing with 24V industrial bus and isolated USB data lines. Use Value: Eliminates need for external LDO or charge controller; hiccup-mode protection prevents downtime during accidental short circuits. |
| Point-of-Sale Terminal | Smart Kiosk Power Supply |
Use Scenario: Compact retail terminal with integrated barcode scanner and payment reader powered via USB. IC Role / Device Role / Timing Role: High-efficiency 5V source with fast transient response to handle burst current from peripheral activation. Use Value: 13mV output ripple ensures clean power for sensitive analog sensors and communication ICs without additional filtering. | Use Scenario: Outdoor kiosk powered from unregulated 24V solar or PoE-derived supply with variable input conditions. IC Role / Device Role / Timing Role: Input-tolerant USB power conditioner with line drop compensation for long internal harnesses. Use Value: Compensates for >300mV IR drop across 1m of 24AWG wiring, preserving 5V compliance at the USB connector. |
Availability
MEZS91202A is available at Aetrix Electronics and suitable for automotive USB adapters, industrial docking stations, point-of-sale terminals, and smart kiosk power supplies requiring stable component supply and production-ready USB charging capability.
Supply support for MEZS91202A 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 and modules, headquartered in Kirkland, WA, with global design and support centers.
The mEZ series delivers fully tested, ready-to-use DC-DC power modules targeting rapid prototyping and production deployment in automotive, industrial, and consumer USB power applications.
FAQ
What USB charging protocols does the MEZS91202A support?
The MEZS91202A supports Dedicated Charging Port (DCP) mode per USB Battery Charging Specification v1.2, plus divider mode and 1.2V/1.2V handshake for legacy Apple and Samsung devices. It does not support USB PD or QC protocols.
Can the output voltage be adjusted externally?
No - the MEZS91202A is factory-configured for fixed 5V output. The MP2496M controller inside uses internal feedback resistors; no external resistor network or VSET pin is accessible on this module.
Is thermal pad soldering required for reliable operation?
Yes - the QFN-26 package includes an exposed thermal pad that must be soldered to a dedicated copper pour on the PCB. Omitting this connection risks thermal shutdown above 1.5A load and violates MPS mounting recommendations.
Does the module include input ESD or surge protection?
No - the MEZS91202A has no integrated TVS or surge suppression. External 36V-rated TVS diodes (e.g., SMAJ36A) and input bulk capacitance are required for automotive load-dump immunity per ISO 7637-2.
What is the minimum recommended input capacitance?
MPS specifies ≥47μF total input capacitance near the VIN pins. The reference BOM uses five 10μF X5R ceramics (C1–C1D) plus one 100μF POSCAP (C2), totaling 150μF with low ESR to suppress switching noise and sustain input during load transients.
How is short-circuit protection implemented?
Short-circuit protection operates in hiccup mode: after detecting overcurrent, the module shuts down for ~500ms, then attempts soft-start recovery. This repeats until fault clears, limiting average power dissipation to <1W during sustained shorts.
Are Gerber files and layout guidelines available?
Yes - Monolithic Power provides complete Gerber files, assembly drawings, and PCB layout guidelines upon request to [email protected]. These include thermal pad stencil design, decoupling placement, and USB trace routing recommendations.
MEZS91202A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 4-SIP Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7V
- Voltage - Input (Max):
- 36V
- Voltage - Output 1:
- 5V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 2.5A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OCP, OTP, SCP
- Operating Temperature:
- -40°C ~ 85°C
- Efficiency:
- 93%
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MEZS91202A FAQ
1.How can I place an order for MEZS91202A through Aetrix?
Please submit a Request for Quotation (RFQ) for MEZS91202A 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 MEZS91202A reliable?
The price and inventory of MEZS91202A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEZS91202A is usually 5 days.
3.What payment methods are accepted for MEZS91202A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEZS91202A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEZS91202A?
MEZS91202A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEZS91202A 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 MEZS91202A?
For technical support, including MEZS91202A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEZS91202A requirements.
6.How does Aetrix verify that MEZS91202A is sourced from the original manufacturer or authorized distributors?
All MEZS91202A 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 MEZS91202A meets industry standards.
7.What is the process for return or replacement of MEZS91202A?
All MEZS91202A units undergo pre-shipment inspection (PSI). If there is an issue with MEZS91202A, 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 MEZS91202A part is unused and in its original packaging.
Return procedure for MEZS91202A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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