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Monolithic Power Systems Inc. MP4572GQB-Z
- Part No.:
- MP4572GQB-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-VFQFN
- Datasheet:
-
MP4572GQB-Z.pdf
- Description:
- IC REG BUCK 2A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,086
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Product details
Overview
MP4572GQB-Z from Monolithic Power Systems is a fully integrated, synchronous buck converter delivering up to 2A continuous output current with 4.5V–60V input range, 0.8V reference voltage (±1% at 25°C), 40μA quiescent current, and internal 250mΩ/45mΩ MOSFETs - designed for automotive infotainment power rails requiring cold-crank operation and AEC-Q100-aligned reliability.
For engineers reviewing the MP4572GQB-Z datasheet, MP4572GQB-Z pinout, MP4572GQB-Z application, or MP4572GQB-Z equivalent, key selection criteria include VIN UVLO thresholds (3.8V rising / 3.5V falling), programmable switching frequency (300–2200 kHz via resistor), PG indicator accuracy (±6% VOUT window), and thermal shutdown at 170°C with 25°C hysteresis.
Technical Context
The MP4572GQB-Z employs peak-current-mode PWM control with valley-current OCP and zero-cross detection for precise light-load regulation. Its asynchronous modulation (AAM) dynamically scales switching frequency below 200 kHz under light load to minimize gate and switching losses while maintaining 2μA shutdown current.
It integrates internal compensation, soft-start (0.45 ms), low-dropout mode for automotive cold-crank (VIN down to 4.5V), and hiccup-mode short-circuit protection. The 180° out-of-phase SYNCO clock enables multi-phase synchronization without external timing components.
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 and cold-crank transients. |
| Continuous Output Current | 2A - sustained delivery with internal MOSFETs eliminating need for external Schottky diode or gate drivers. |
| Feedback Reference Voltage | 0.800V ±1% at 25°C - enables precise output regulation (e.g., 5V ±50mV) using standard resistor dividers. |
| Quiescent Current | 40μA in active AAM mode - minimizes standby power loss in always-on vehicle modules. |
| Switching Frequency Range | 300 kHz to 2.2 MHz - set by external resistor on FREQ pin; higher frequencies allow smaller inductors (e.g., 4.7μH at 2.2MHz). |
| Power Good Threshold | 90–108% of nominal VOUT - open-drain PG pin asserts high only when output is within tight regulation band. |
| Thermal Shutdown | 170°C junction temperature with 25°C hysteresis - auto-recovery prevents latch-up during transient overloads. |
Pinout & Package
MP4572GQB-Z is housed in a thermally enhanced QFN-12 package (2.5mm × 3mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by dot; pins 9 and 10 are NC and may be tied to GND for improved thermal/EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Connects external capacitor between BST and SW to generate floating gate drive for high-side MOSFET. |
| SW | Switch node | High-current output node connecting internal HS/LS FETs; requires wide PCB trace and low-inductance layout. |
| PG | Power good indicator | Open-drain output pulled high only when VOUT is within 90–108% of target; requires external pull-up. |
| FB | Feedback input | Negative input of error amplifier; sets output voltage via resistor divider; also used by PG and UVLO circuits. |
| FREQ | Frequency programming | Resistor-to-GND sets switching frequency (e.g., 76.8kΩ = 400kHz); enables EMI optimization. |
| VCC | Internal bias supply | Internally regulated ~5V rail; requires ≥1μF ceramic decoupling capacitor placed adjacent to pin. |
| GND | Ground reference | Primary return path for power and signal; must connect to large copper area shared with input/output capacitors. |
| IN | Main input supply | Accepts full 4.5–60V range; requires low-ESR input capacitor placed as close as possible to this pin. |
| EN | Enable control | Active-high logic input (1.45V typical threshold); floating or low disables device and reduces IQ to 2μA. |
| CCM/SYNCO | Mode select & sync output | Pull to GND via 10–300kΩ for forced CCM; float for AAM; outputs 180° out-of-phase clock for multi-phase sync. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | 250mΩ (HS) and 45mΩ (LS) RDS(on) at 25°C - eliminates external rectifier and reduces BOM count and footprint. |
| Advanced Asynchronous Modulation (AAM) | Reduces switching frequency under light load to cut gate driver and switching losses - maintains >85% efficiency at 1mA output. |
| Automotive-grade protections | Includes hiccup SCP, valley-current OCP, VIN UVLO (3.8V rise/3.5V fall), thermal shutdown (170°C), and cold-crank dropout mode. |
| Programmable soft start | Fixed 0.45ms internal ramp - prevents inrush current and output overshoot during power-up. |
| Synchronization capability | CCM/SYNCO pin provides 180° phase-shifted clock - enables seamless two-phase interleaving without external oscillator. |
Applications
| Automotive Infotainment | Automotive LED Lighting |
|---|---|
|
Use Scenario: Powering head-unit SoC core rails (e.g., 1.1V/1.8V/3.3V) from 12V battery with load dump immunity. IC Role / Device Role / Timing Role: Primary DC-DC regulator providing stable, low-noise intermediate bus with PG monitoring for system sequencing. Use Value: Cold-crank operation down to 4.5V input ensures uninterrupted display/audio during engine start; AAM extends battery life in standby. |
Use Scenario: Driving high-brightness LED arrays in adaptive front lighting (AFL) or interior ambient lighting. IC Role / Device Role / Timing Role: Constant-voltage source regulating LED string supply; PG confirms safe illumination state before enabling drivers. Use Value: 60V max input withstands 48V architecture transients; 2A output supports multi-string configurations without external pass devices. |
| Automotive Motor Control | Industrial Power Systems |
|
Use Scenario: Supplying gate drivers and logic for BLDC motor controllers in HVAC blowers or seat adjusters. IC Role / Device Role / Timing Role: Secondary power rail generator converting battery voltage to 5V/12V for MCU and driver ICs. Use Value: Low 40μA quiescent current meets ISO 16750-2 sleep-mode requirements; hiccup SCP prevents thermal runaway during stall conditions. |
Use Scenario: Providing isolated auxiliary power in industrial PLC I/O modules operating from 24V or 48V field buses. IC Role / Device Role / Timing Role: Compact, self-contained step-down stage replacing discrete buck controllers + MOSFETs + compensation network. Use Value: Internal compensation and QFN-12 package reduce design cycle time; 125°C max junction temp supports convection-cooled enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4572GQB-Z | Automotive-grade variant with AEC-Q100 qualification, same electrical specs and pinout. | Required for safety-critical automotive ECUs; identical thermal and electrical behavior in non-automotive use. | Select MPQ4572GQB-Z if AEC-Q100 compliance is mandated; otherwise MP4572GQB-Z offers identical performance at lower cost. |
| LM61480RGER | TI part with 3.5–36V input, 8A output, 2.1MHz max fSW, but no built-in SYNC output or cold-crank mode. | Lacks 60V rating and automotive-specific features (e.g., 4.5V UVLO, hiccup SCP), limiting use to 24V industrial systems. | Choose LM61480RGER only when >2A output or higher integration density is required - not drop-in compatible due to different VIN range and feature set. |
Compared with MPQ4572GQB-Z, the MP4572GQB-Z trades AEC-Q100 certification for cost savings while retaining identical electrical performance; versus LM61480RGER, it delivers superior automotive robustness and lower quiescent current but at half the output current capacity.
Availability
MP4572GQB-Z is available at Aetrix Electronics and suitable for automotive infotainment, LED lighting, and industrial power systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MP4572GQB-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 centers in the US, China, and Taiwan and global manufacturing partnerships.
The MP4572 belongs to MPS's automotive-qualified buck converter product line, engineered specifically for harsh-environment DC-DC conversion in vehicles - emphasizing input transient resilience, low IQ, and integrated protection.
FAQ
What is the minimum input voltage required for startup?
The MP4572GQB-Z starts switching when VIN exceeds the rising UVLO threshold of 3.8V (typical). However, reliable regulation down to full 2A load requires VIN ≥ 4.5V due to dropout characteristics and internal bias generation constraints.
Can the MP4572GQB-Z operate in forced continuous conduction mode (FCCM)?
Yes - tie the CCM/SYNCO pin to GND via a 10kΩ–300kΩ resistor to force FCCM operation regardless of load. This eliminates frequency variation and simplifies EMI filtering but increases light-load quiescent current versus AAM mode.
How is the power good (PG) signal asserted and deasserted?
PG goes high (open-drain pulled up) when FB voltage is between 90% and 108% of VREF (i.e., 0.72V–0.864V for 0.8V reference); it pulls low when FB falls below 84% or rises above 116% of VREF, with 70μs rise/fall delay.
What thermal pad connection is required for the QFN-12 package?
The exposed thermal pad must be soldered to a dedicated PCB copper pour connected to GND. Minimum recommended stencil aperture is 70% of pad area; thermal vias (≥4×0.3mm) should connect directly to inner ground planes to achieve θJA ≤ 45°C/W.
Does the MP4572GQB-Z support output voltages below 1V?
No - the datasheet specifies a minimum output voltage of 1V, determined by the 0.8V feedback reference and practical resistor-divider limitations. Attempting sub-1V regulation risks instability and violates guaranteed operating conditions.
How does the device behave during cold-crank conditions (VIN dropping to 4.5V)?
In low-dropout mode, the MP4572GQB-Z maintains regulation by extending high-side on-time beyond normal limits. Output voltage remains within ±5% of target down to VIN = 4.5V at full 2A load, provided output capacitor ESR is ≤ 10mΩ.
Is an external bootstrap capacitor required, and what value is recommended?
Yes - a 0.1μF X7R ceramic capacitor must be placed between BST and SW pins. It must be located within 2mm of the IC with minimal loop area to sustain gate drive during high-duty-cycle operation.
MP4572GQB-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:
- -
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- Up to 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-QFN (2.5x3)
MP4572GQB-Z FAQ
1.How can I place an order for MP4572GQB-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4572GQB-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 MP4572GQB-Z reliable?
The price and inventory of MP4572GQB-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4572GQB-Z is usually 5 days.
3.What payment methods are accepted for MP4572GQB-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4572GQB-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4572GQB-Z?
MP4572GQB-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4572GQB-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 MP4572GQB-Z?
For technical support, including MP4572GQB-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4572GQB-Z requirements.
6.How does Aetrix verify that MP4572GQB-Z is sourced from the original manufacturer or authorized distributors?
All MP4572GQB-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 MP4572GQB-Z meets industry standards.
7.What is the process for return or replacement of MP4572GQB-Z?
All MP4572GQB-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4572GQB-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 MP4572GQB-Z part is unused and in its original packaging.
Return procedure for MP4572GQB-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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