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Monolithic Power Systems Inc. MP4576GQBE-Z
- Part No.:
- MP4576GQBE-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-VFQFN
- Datasheet:
-
MP4576GQBE-Z.pdf
- Description:
- IC REG BUCK ADJ 600MA 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,536
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Product details
Overview
MP4576GQBE-Z from Monolithic Power Systems is a fully integrated, synchronous buck converter delivering up to 600mA continuous output current with 4.5V–60V input range, 0.8V feedback reference, and internal high-side/low-side MOSFETs. It supports automotive cold-crank operation via low-dropout mode and achieves 91% efficiency at 24V→5V/600mA/400kHz. Used in infotainment power rails where wide VIN and low quiescent current (40µA) are critical.
For engineers reviewing the MP4576GQBE-Z datasheet, MP4576GQBE-Z pinout, MP4576GQBE-Z application, or MP4576GQBE-Z equivalent, key selection criteria include its AAM/FCCM mode selectability, valley-current OCP with hiccup SCP, PG open-drain indicator, and QFN-12 wettable flank package for automotive-grade solder joint inspection.
Technical Context
The MP4576 employs peak-current-mode PWM control with internal slope compensation and valley-current detection for over-current protection. Its oscillator supports programmable switching frequency (300–2700 kHz) via external resistor on FREQ pin and provides 180° out-of-phase clock output on CCM/SYNCO for multi-phase synchronization.
It integrates a 0.8V precision bandgap reference, internal soft-start (450 µs), and dual-mode operation: Advanced Asynchronous Mode (AAM) for light-load efficiency and Forced Continuous Conduction Mode (FCCM) for fixed-frequency EMI control. Thermal shutdown activates at 170°C with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports 12V/24V/48V automotive battery systems including load dump (65V abs max) and cold-crank down to 4.5V. |
| Output Current | 600mA continuous - sufficient for powering microcontrollers, sensors, and LED drivers in compact automotive modules. |
| Feedback Reference | 0.800V ±1.0% - enables precise output regulation using standard resistor dividers; used by PG and UVLO circuits. |
| Quiescent Current | 40µA in standby - extends vehicle battery life during ignition-off periods without compromising wake-up responsiveness. |
| Switching Frequency | 300–2700 kHz (resistor-programmable) - allows EMI optimization and inductor size reduction while avoiding AM radio band (530–1710 kHz). |
| Thermal Protection | Hiccup-mode thermal shutdown at 170°C with 25°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Package | QFN-12 (2.5mm × 3mm, wettable flank) - enables automated optical inspection (AOI) of solder joints and improves thermal performance via exposed pad. |
Pinout & Package
MP4576GQBE-Z uses a thermally enhanced QFN-12 (2.5mm × 3mm) package with wettable flanks and an exposed thermal pad. Pin 1 is marked by a dot; top view orientation follows JEDEC MS-012 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap supply | Connects external capacitor between BST and SW to generate gate drive voltage for high-side MOSFET; critical for proper HS-FET turn-on. |
| 2 SW | Power switch node | High-current switching output connecting to inductor; requires wide PCB trace and tight layout to minimize ringing and EMI. |
| 3 PG | Power good indicator | Open-drain output pulled low if VOUT falls below 84% or exceeds 116% of nominal; used for system power sequencing and fault reporting. |
| 4 FB | Feedback input | Inverting input of error amplifier; regulates output by comparing divider voltage to 0.8V reference; also monitors VOUT for PG and UVLO functions. |
| 5 FREQ | Frequency programming | Resistor-to-GND sets switching frequency (300–2700 kHz); enables EMI tuning and inductor selection flexibility. |
| 6 VCC | Bias supply | Internal LDO output powering control circuitry; requires ≥1µF ceramic decoupling capacitor placed adjacent to pin. |
| 7 GND | Ground reference | Common return for power and signal paths; must connect to large copper pour under exposed thermal pad for thermal and noise performance. |
| 8 IN | Main input supply | Primary power input (4.5–60V); requires local high-frequency ceramic capacitor to suppress switching transients. |
| 9,10 NC | No connection | Unbonded pins; may be tied to GND to improve thermal conduction and reduce EMI radiation. |
| 11 CCM/SYNCO | Mode control / sync output | Pull to GND via resistor for FCCM; float for AAM; outputs 180° phase-shifted clock for synchronizing multiple converters. |
| 12 EN | Enable input | Logic-level control: >1.45V enables device; <1.12V disables with 5µs turn-off delay; supports system-level power management. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Reduces BOM count and board area; eliminates need for external Schottky diode and associated losses. |
| Advanced Asynchronous Mode (AAM) | Automatically reduces switching frequency under light load to maintain >85% efficiency at 1mA, minimizing no-load power loss. |
| Low-dropout mode | Enables stable regulation down to VIN = VOUT + 0.5V, supporting automotive cold-crank conditions (e.g., 6V start-up to 5V rail). |
| Valley-current over-current protection | Detects inductor current at valley point to prevent current runaway during short-circuit events, enabling fast hiccup recovery. |
| MeshConnect™ flip-chip packaging | Reduces parasitic inductance and improves thermal resistance (θJC = 11°C/W), lowering junction temperature rise by ≤8°C at full load. |
Applications
| Infotainment Power Supply | Automotive LED Lamp Driver |
|---|---|
|
Use Scenario: Powering head-unit MCU, display interface ICs, and audio codecs in 12V/24V vehicle architectures. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator converting battery voltage to stable 3.3V or 5V rail with tight line/load regulation. Use Value: 4.5V minimum input ensures operation during cranking dips; 40µA quiescent current minimizes battery drain in parked state. |
Use Scenario: Driving interior ambient lighting, dashboard backlighting, and exterior position lamps requiring regulated constant-voltage supply. IC Role / Device Role / Timing Role: Efficient non-isolated buck converter supplying 5V/12V to LED driver ICs or directly to LED strings with current-limiting resistors. Use Value: 60V absolute maximum input withstands load-dump transients (ISO 7637-2 Pulse 5a); PG output signals lamp health to body controller. |
| Industrial Sensor Node Power | Railway Control Module Supply |
|
Use Scenario: Providing clean, isolated 3.3V power to CAN transceivers, temperature/humidity sensors, and wireless SoCs in battery- or rail-powered edge devices. IC Role / Device Role / Timing Role: Compact, high-efficiency intermediate regulator stepping down 24V industrial bus to logic-level voltage with minimal heat generation. Use Value: QFN-12 wettable flank package supports IPC-A-610 Class 3 solder joint inspection; AAM mode extends battery life in wireless sensor deployments. |
Use Scenario: Powering microcontroller-based train door controllers, brake monitoring units, and signaling interfaces operating from 72V/110V DC traction batteries. IC Role / Device Role / Timing Role: Pre-regulator stage reducing high-voltage DC bus to 12V/5V for downstream LDOs and digital logic, with robust transient immunity. Use Value: 60V input rating covers railway voltage fluctuations; hiccup SCP and thermal shutdown ensure fail-safe behavior in safety-critical subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4576GQ-AEC1-Z | AEC-Q100 Grade 1 qualified; identical electrical specs but validated for -40°C to +125°C junction temperature with extended reliability testing. | Required for ASIL-B automotive safety systems; not needed for industrial or consumer-grade designs. | Select MPQ4576GQ-AEC1-Z when automotive qualification and long-term reliability under temperature cycling are mandatory. |
| LM61460QWRNRQ1 | TI part with 3.5V–36V input, 6A output, and spread-spectrum EMI reduction; larger package (16-pin WQFN) and higher cost. | Suitable for higher-current applications (>1A); lacks 60V rating and cold-crank support below 4.5V. | Choose LM61460QWRNRQ1 only when scaling output current beyond 600mA or requiring TI's WEBENCH integration and spread-spectrum features. |
Compared with MPQ4576GQ-AEC1-Z, the MP4576GQBE-Z offers identical performance at lower cost and qualification overhead for non-safety-critical automotive or industrial use; versus LM61460QWRNRQ1, it delivers optimal size and voltage range for sub-1A 60V applications but lacks spread-spectrum and higher current capability.
Availability
MP4576GQBE-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, LED lamp drivers, industrial sensor nodes, and railway control modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for MP4576GQBE-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 design expertise in DC-DC conversion, motor drivers, and LED lighting solutions.
The MP4576 belongs to MPS's automotive-grade synchronous buck converter product line, engineered specifically for harsh-environment applications demanding wide input range, low IQ, and robust protection features in compact packages.
FAQ
What is the minimum input voltage required for MP4576GQBE-Z to regulate output during cold-crank?
The MP4576GQBE-Z supports input voltages as low as 4.5V and enters low-dropout mode to maintain regulation when VIN approaches VOUT. At 5V output, it sustains regulation down to ~5.5V input under full 600mA load, verified per Figure 12 in the datasheet.
Can MP4576GQBE-Z synchronize to an external clock?
No - the CCM/SYNCO pin functions only as a synchronization *output*, providing a 180° phase-shifted copy of the internal clock. It does not accept external clock inputs; synchronization is one-way and intended for multi-converter timing alignment.
How is power good (PG) asserted and what voltage thresholds trigger it?
PG is an open-drain output pulled low when VOUT falls below 84% or exceeds 116% of the nominal value set by the FB divider. It asserts high when VOUT is within 90–108% of nominal, with 70µs rise and 25µs fall delay, enabling reliable power sequencing.
Does MP4576GQBE-Z require an external compensation network?
No - the MP4576GQBE-Z features internal compensation, eliminating external Type-II or Type-III compensation components. Only standard input/output capacitors, inductor, and feedback resistors are required for full operation.
What is the thermal resistance (θJA) of the QFN-12 package under standard test conditions?
On a 4-layer JEDEC JESD51-7 board, θJA is 60°C/W. On MPS's EVQ4576-QB-00A evaluation board (8.9cm × 8.9cm, 2oz copper), θJA improves to 45°C/W - confirming effective thermal performance with proper PCB layout and thermal pad soldering.
Is the BST capacitor value specified, and what type is recommended?
While not explicitly specified in the datasheet, a 0.1µF X7R ceramic capacitor is recommended between BST and SW pins, placed as close as possible to minimize loop inductance. This ensures stable high-side gate drive across temperature and load conditions.
How does the MP4576GQBE-Z handle short-circuit conditions?
It implements hiccup-mode short-circuit protection: upon detecting valley current exceeding 1A, it shuts down, waits ~50ms, then attempts restart. This cycle repeats until fault clears, limiting average power dissipation and preventing thermal runaway.
MP4576GQBE-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 12-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 54V
- Current - Output:
- 600mA
- Frequency - Switching:
- 400kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-QFN (2.5x3)
MP4576GQBE-Z FAQ
1.How can I place an order for MP4576GQBE-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4576GQBE-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 MP4576GQBE-Z reliable?
The price and inventory of MP4576GQBE-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4576GQBE-Z is usually 5 days.
3.What payment methods are accepted for MP4576GQBE-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4576GQBE-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4576GQBE-Z?
MP4576GQBE-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4576GQBE-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 MP4576GQBE-Z?
For technical support, including MP4576GQBE-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4576GQBE-Z requirements.
6.How does Aetrix verify that MP4576GQBE-Z is sourced from the original manufacturer or authorized distributors?
All MP4576GQBE-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 MP4576GQBE-Z meets industry standards.
7.What is the process for return or replacement of MP4576GQBE-Z?
All MP4576GQBE-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4576GQBE-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 MP4576GQBE-Z part is unused and in its original packaging.
Return procedure for MP4576GQBE-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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