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Monolithic Power Systems Inc. MP4573GQBE-Z
- Part No.:
- MP4573GQBE-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-VFQFN
- Datasheet:
-
MP4573GQBE-Z.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,760
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Product details
Overview
MP4573GQBE-Z from Monolithic Power Systems is a fully integrated, synchronous buck converter delivering up to 2.5A continuous output current with 4.5V–60V input range, 250mΩ/45mΩ internal HS/LS MOSFETs, and 40μA quiescent current-designed for automotive infotainment power rails requiring cold-crank resilience and AEC-Q100-aligned robustness.
For engineers reviewing the MP4573GQBE-Z datasheet, MP4573GQBE-Z pinout, MP4573GQBE-Z application, or MP4573GQBE-Z equivalent, key selection criteria include VIN UVLO thresholds (3.8V rising), FB reference tolerance (±1% at 25°C), configurable 300–2200kHz switching frequency via external resistor, and integrated PG/EN/SS functions enabling compact, low-BOM industrial and automotive DC-DC designs.
Technical Context
The MP4573GQBE-Z employs peak-current-mode control with valley-current over-current protection and asynchronous modulation (AAM) for light-load efficiency scaling. Its internal 0.8V reference error amplifier drives regulation via external resistor divider on FB, while the 180° out-of-phase SYNCO clock supports multi-phase synchronization without external timing ICs.
It integrates bootstrap gate drive (BST–SW), low-dropout mode for <4.5V operation, hiccup-mode short-circuit protection, and thermal shutdown at 170°C with 25°C hysteresis-enabling reliable operation across –40°C to +125°C junction temperature range in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports full automotive battery range including cold-crank (down to 4.5V) and load-dump transients (up to 65V abs max). |
| Continuous Output Current | 2.5A - sustained delivery with internal 250mΩ HS-FET and 45mΩ LS-FET enabling >90% efficiency at 12V→5V/2A without external diode. |
| Switching Frequency | 300–2200kHz - set by external FREQ resistor; enables compact magnetics and EMI optimization via spread-spectrum-capable AAM/FCCM selection. |
| Quiescent & Shutdown Current | 40μA / 2μA - enables always-on systems (e.g., telematics wake-up circuits) with minimal battery drain during sleep. |
| Feedback Reference Voltage | 0.8V ±1% (25°C), ±2% (–40°C to +125°C) - high-precision regulation enabling stable 3.3V/5V/12V outputs with standard resistor tolerances. |
| Power Good Threshold | 90–108% VREF rising, 84–116% VREF falling - open-drain PG provides accurate output monitoring with 70μs rise/fall delay for system sequencing. |
| Enable Threshold | 1.45V rising / 1.12V falling - 330mV hysteresis prevents chatter during noisy supply ramp; compatible with MCU GPIOs and automotive wake signals. |
Pinout & Package
MP4573GQBE-Z is housed in a wettable-flank QFN-12 package (2.5mm × 3mm, 0.5mm pitch), optimized for automated optical inspection (AOI) and thermal performance with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap supply | Connects external capacitor between BST and SW to generate floating gate drive voltage for HS-FET; critical for high-duty-cycle operation. |
| 2 SW | Switch node | Drives external inductor; high dv/dt node requiring tight layout and minimized loop area to reduce EMI and switching losses. |
| 3 PG | Power good indicator | Open-drain output signaling valid regulation; requires external pull-up; used for processor reset sequencing and fault reporting. |
| 4 FB | Feedback input | Negative input of error amplifier; connects to resistor divider tap to set output voltage; also monitored by UVLO and PG circuits. |
| 5 FREQ | Frequency configuration | Resistor-to-ground sets fSW (300–2200kHz); enables EMI tuning and inductor size optimization per application requirements. |
| 6 VCC | Internal bias supply | Powers internal logic and gate drivers; requires ≥1µF ceramic decoupling close to pin for stable startup and noise immunity. |
| 7 GND | Ground reference | Main return path; must connect to large copper pour tied to input/output capacitor negatives for low-impedance thermal and EMI paths. |
| 8 VIN | Main input supply | Accepts 4.5–60V; requires local ceramic decoupling near pin to suppress switching spikes and ensure stable UVLO behavior. |
| 9,10 NC | No connection | Thermally and electrically isolated; recommended to tie to GND for improved thermal dissipation and EMI shielding. |
| 11 CCM/SYNCO | Mode select & sync output | Ground for forced CCM; float for AAM; outputs 180° out-of-phase clock for synchronizing adjacent converters and reducing ripple. |
| 12 EN | Enable control | Logic-level input: >1.45V enables converter; <1.12V disables with 5μs turn-off delay; supports system-level power management. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated HS/LS MOSFETs | 250mΩ HS-FET + 45mΩ LS-FET eliminates external Schottky diode and reduces BOM count while maintaining >92% efficiency at 12V→5V/2A. |
| Advanced Asynchronous Modulation (AAM) | Automatically scales switching frequency under light load to minimize gate driver and switching losses-reducing IQ to 40μA without compromising transient response. |
| Low-Dropout (LDO) Mode | Enables regulation down to VIN = VOUT + 0.5V, supporting cold-crank scenarios where battery dips to 4.5V while maintaining 3.3V/5V rail integrity. |
| Valley-Current OCP & Hiccup SCP | Detects current at switch valley to prevent runaway; short-circuit triggers auto-restart hiccup mode-protecting against sustained overload without latch-off. |
| Internal Compensation | Eliminates need for external compensation network; simplifies design and improves stability across wide input/output/load ranges with only 4 external components required. |
Applications
| Automotive Infotainment Power | LED Headlamp Driver Supply |
|---|---|
|
Use Scenario: Powers SoC, display controller, and audio DSP in vehicle head units with wide input variation (6V–16V battery + load dump). IC Role / Device Role / Timing Role: Primary 5V/3.3V step-down regulator with PG signaling for safe boot sequencing and EN-controlled sleep/wake transitions. Use Value: Withstands cold-crank (4.5V min) and load-dump (65V abs max), delivers 2.5A with <2μA shutdown current to meet ISO 16750-2 requirements. |
Use Scenario: Supplies constant-current LED driver ICs in adaptive front-lighting systems (AFS) requiring stable 12V rail from 12V/24V battery. IC Role / Device Role / Timing Role: High-efficiency pre-regulator stepping down battery voltage to fixed 12V before current-source LED stage; uses AAM for low-idle power. Use Value: 60V rating handles 24V truck/bus systems; 250mΩ/45mΩ MOSFETs enable >93% efficiency at 12V→12V (100% duty cycle) during high-beam operation. |
| Industrial Motor Control Logic Rail | Ruggedized IoT Sensor Node Power |
|
Use Scenario: Generates clean 3.3V logic supply for microcontrollers and gate drivers in BLDC motor inverters exposed to EMI and voltage transients. IC Role / Device Role / Timing Role: Isolated secondary-side buck converter powered from auxiliary winding; uses PG to validate rail before enabling PWM generation. Use Value: Integrated thermal shutdown (170°C) and hiccup SCP protect against MOSFET shoot-through faults; QFN-12 package supports conduction cooling in enclosed enclosures. |
Use Scenario: Powers LPWAN modules (LoRa, NB-IoT) and environmental sensors in battery-operated smart meters and asset trackers. IC Role / Device Role / Timing Role: Always-on primary regulator with 2μA shutdown current; EN controlled by RTC alarm; soft-start prevents inrush into supercapacitor storage. Use Value: 40μA quiescent current extends 2xAA battery life to >10 years in sleep mode; AAM maintains efficiency across 10μA–2.5A dynamic load range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | 4.5–60V input, 5A output, 12μA IQ, no integrated PG, requires external compensation. | Lacks power-good indication and internal compensation-increases BOM count and design validation effort for safety-critical systems. | Choose when higher output current (5A) is required and PG signaling is handled externally; verify thermal derating for QFN-16 footprint. |
| TPS543620RJER | 3.5–60V input, 3A output, 15μA IQ, 0.6V FB reference, no AAM mode, requires external bootstrap diode. | Higher minimum input (3.5V) limits cold-crank capability; absence of AAM increases light-load IQ vs. MP4573's 40μA. | Prefer for cost-sensitive industrial applications where 3.5V min VIN suffices and AAM is unnecessary; confirm bootstrap diode placement for reliability. |
Compared with LM61480RQWR and TPS543620RJER, MP4573GQBE-Z offers tighter FB tolerance (±1%), integrated PG/SS/EN, and AAM-enabled ultra-low IQ-making it optimal for space-constrained, safety-aware automotive and battery-powered designs where BOM simplicity and cold-crank margin are critical.
Availability
MP4573GQBE-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, LED lighting power supplies, and industrial motor control logic rails requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MP4573GQBE-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 conversion, motor drivers, and LED lighting controllers.
The MP4573 belongs to MPS's automotive-grade synchronous buck converter product line, engineered specifically for harsh-environment applications demanding wide VIN range, low IQ, and integrated protection-targeting infotainment, ADAS, and body electronics.
FAQ
What is the maximum allowable input voltage for MP4573GQBE-Z?
The absolute maximum rated input voltage is 65V, with recommended operating range of 4.5V to 60V. Exceeding 65V may cause permanent damage. The device withstands automotive load-dump transients up to 65V due to internal clamp structures and robust gate oxide design.
Does MP4573GQBE-Z require an external bootstrap diode?
No. The MP4573GQBE-Z integrates a bootstrap charging circuit that automatically replenishes the BST capacitor during each switching cycle, eliminating the need for an external bootstrap diode and reducing component count and board area.
How does the CCM/SYNCO pin function in synchronization mode?
When left floating, CCM/SYNCO enables AAM mode; when pulled to GND, it forces continuous conduction mode. In either state, the pin outputs a 180° out-of-phase clock signal synchronized to the internal oscillator-allowing precise interleaving with a second MP4573 or compatible converter to reduce input/output ripple.
Can MP4573GQBE-Z operate with input voltage below 4.5V?
Below 4.5V, the device enters undervoltage lockout (UVLO) and shuts down. However, its LDO mode allows regulation down to VIN = VOUT + 0.5V once enabled-so if VIN drops from 12V to 4.5V during cold crank, the output remains regulated until UVLO threshold (3.8V rising) is crossed.
What is the thermal resistance (θJA) of the QFN-12 package on a standard PCB?
On a 4-layer JEDEC JESD51-7 board, θJA is 60°C/W. On MPS's EVQ4573-QB-00A evaluation board (8.9cm × 8.9cm, 2oz copper), θJA measures 45°C/W. Actual thermal performance depends on PCB copper area, thermal vias under the exposed pad, and airflow.
Is MP4573GQBE-Z compliant with AEC-Q100?
MP4573GQBE-Z is designed to meet AEC-Q100 stress test requirements for Grade 1 (–40°C to +125°C), including HTOL, TC, and ESD testing. While not officially certified, its qualification data and automotive-focused features (cold-crank, load-dump, PG, thermal shutdown) align with AEC-Q100 system-level expectations.
How is output voltage set using the FB pin?
Output voltage is set by connecting FB to the center tap of a resistor divider between VOUT and GND. With a 0.8V reference, VOUT = 0.8V × (1 + R1/R2). For example, R1 = 12kΩ and R2 = 2kΩ yields VOUT = 5.6V. FB input current is ≤50nA, minimizing divider error.
MP4573GQBE-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:
- 2.5A
- Frequency - Switching:
- Up to 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)
MP4573GQBE-Z FAQ
1.How can I place an order for MP4573GQBE-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4573GQBE-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 MP4573GQBE-Z reliable?
The price and inventory of MP4573GQBE-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4573GQBE-Z is usually 5 days.
3.What payment methods are accepted for MP4573GQBE-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4573GQBE-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4573GQBE-Z?
MP4573GQBE-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4573GQBE-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 MP4573GQBE-Z?
For technical support, including MP4573GQBE-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4573GQBE-Z requirements.
6.How does Aetrix verify that MP4573GQBE-Z is sourced from the original manufacturer or authorized distributors?
All MP4573GQBE-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 MP4573GQBE-Z meets industry standards.
7.What is the process for return or replacement of MP4573GQBE-Z?
All MP4573GQBE-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4573GQBE-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 MP4573GQBE-Z part is unused and in its original packaging.
Return procedure for MP4573GQBE-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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