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Monolithic Power Systems Inc. MPQ4470GL-AEC1-Z
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- Part No.:
- MPQ4470GL-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
MPQ4470GL-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 5A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,758
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Product details
Overview
MPQ4470GL-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 5A continuous output current across a 4.5V–36V input range. It integrates 40mΩ high-side and 20mΩ low-side MOSFETs, features latch-off over-voltage protection (OVP), programmable soft-start, and operates at 100kHz–1MHz switching frequency. It is deployed in automotive ADAS power rails requiring fast transient response and thermal robustness.
For engineers reviewing the MPQ4470GL-AEC1-Z datasheet, MPQ4470GL-AEC1-Z pinout, MPQ4470GL-AEC1-Z application, or MPQ4470GL-AEC1-Z equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification, OVP latch behavior, 0.8V–0.9×VIN adjustable output, 1% reference voltage accuracy, and QFN20 (3mm×4mm) package with exposed thermal pads for automotive-grade thermal management.
Technical Context
The MPQ4470GL-AEC1-Z implements a current-mode PWM controller with integrated gate drivers and proprietary switching-loss-reduction technology. Its ON-time is determined by VIN and an external resistor on the FREQ pin, enabling stable frequency setting across input voltage variations while maintaining constant duty ratio (VOUT/VIN).
It supports both continuous-conduction mode (CCM) at heavy loads and skip-mode operation at light loads to sustain high efficiency down to microamp quiescent currents. Protection logic includes cycle-by-cycle over-current detection, hiccup-mode short-circuit response, non-latching UVLO (4.0V rising / 3.1V falling), and thermal shutdown at 175°C with 45°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 36V - Supports 12V/24V automotive battery rails with 40V absolute max rating. |
| Continuous Output Current | 5A - Delivers full rated load without derating up to +125°C junction temperature. |
| Switching Frequency | 100kHz to 1MHz - Adjustable via external resistor; enables compact LC filter design with ceramic output capacitors. |
| Feedback Reference Voltage | 0.815V ±12mV - Enables precise output regulation; sets VOUT = 0.815V × (1 + R1/R2). |
| Internal MOSFET RDS(on) | HS: 40mΩ, LS: 20mΩ - Minimizes conduction loss; supports >92% peak efficiency at 3.3V/3A (VIN=12V). |
| OVP Response | Latch-off at 1.25×VREF - Forces shutdown until power cycle; prevents damage during output fault conditions. |
| Quiescent Current | 600μA typical - Maintains low standby power in always-on automotive modules. |
Pinout & Package
MPQ4470GL-AEC1-Z is housed in a thermally enhanced 3mm×4mm, 20-pin QFN package with five exposed thermal pads (pins 8, 19, 21, 22, 23) connected to IN and five more (pins 9, 10, 17, 18, 24, 25) connected to SW - optimized for high-current routing and PCB heat dissipation in automotive layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AGND | Analog ground reference for feedback and control circuitry; must be isolated from PGND in layout to avoid noise coupling. |
| 2 | FREQ | Frequency-setting input; connects to GND via resistor to program ON-time and switching frequency (100kHz–1MHz). |
| 3 | FB | Feedback node; monitors output voltage via resistor divider; triggers regulation when VFB drops below 0.815V. |
| 4 | SS | Soft-start capacitor node; internal 8.5μA current source ramps voltage to control output rise time and limit inrush current. |
| 5 | EN | Enable input with 1.25V rising threshold and 0.86V falling threshold; includes internal 1MΩ pull-down for default disable. |
| 6 | PGOOD | Open-drain power-good flag; asserts HIGH after ~700μs when VFB ≥ 90% of reference; used for system sequencing. |
| 7 | BST | Bootstrap supply for high-side driver; requires 0.1μF–1μF capacitor between BST and SW to sustain gate drive above VIN. |
| 8,19,21,22,23 | IN | High-current input power pins; multiple parallel connections reduce impedance and thermal resistance for 5A operation. |
| 9,10,17,18,24,25 | SW | Switch-node outputs; connect directly to inductor; require wide copper pours and multiple vias for EMI and thermal performance. |
| 11–16 | PGND | Power ground return for output stage; forms low-impedance path for inductor current; must tie to AGND at single point. |
| 20 | VCC | Internally regulated bias supply (~4.85V); requires local 1μF ceramic decoupling for stable gate driver operation. |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary switching-loss reduction | Reduces gate-drive and switching losses at high frequencies, enabling 1MHz operation without efficiency penalty. |
| Low dropout mode support | Maintains regulation even at VIN–VOUT < 1V via bootstrap refresh circuitry - critical for cold-crank automotive scenarios. |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C operating junction temperature - meets automotive power rail reliability requirements. |
| Programmable soft-start | External capacitor sets ramp time; prevents inrush current and avoids triggering OCP during startup. |
| Fast transient response | Stabilizes within 10μs under 2A load step (50%–100%) due to high-bandwidth current-mode control architecture. |
Applications
| Automotive ADAS Camera Module | Infotainment System Core Logic Rail |
|---|---|
Use Scenario: Powers image sensor and ISP in forward-facing camera systems subject to engine start-stop and load dump transients. IC Role / Device Role / Timing Role: Primary 3.3V/5A buck regulator supplying sensor analog front-end and digital core; provides PGOOD for safe boot sequencing. Use Value: Latch-off OVP prevents latch-up during reverse-battery or load-dump-induced output overvoltage; AEC-Q100 Grade 1 ensures functional safety compliance. | Use Scenario: Generates 1.1V core voltage for SoC in head-unit infotainment systems with variable thermal loading. IC Role / Device Role / Timing Role: High-efficiency POL converter with programmable soft-start; coordinates power-up with MCU reset assertion via PGOOD. Use Value: 1% reference voltage and fast transient response maintain SoC voltage within ±3% during burst-mode CPU activity. |
| Body Control Module (BCM) I/O Power | Automotive Telematics Unit (TCU) RF Subsystem |
Use Scenario: Supplies 5V rail to CAN transceivers, LIN interfaces, and LED drivers in centralized body electronics. IC Role / Device Role / Timing Role: Robust 5V/5A supply with UVLO hysteresis (900mV) to tolerate cranking dips; EN pin enables wake-on-LIN functionality. Use Value: Integrated 40mΩ/20mΩ MOSFETs eliminate external discrete FETs, reducing BOM count and board space in space-constrained BCMs. | Use Scenario: Powers LTE/5G RF front-end ICs requiring clean, low-noise 3.3V supply with minimal ripple. IC Role / Device Role / Timing Role: Low-EMI buck converter with skip-mode operation; SS pin synchronizes with baseband processor power-up sequence. Use Value: Programmable frequency avoids interference with cellular bands; ceramic-cap-friendly design eliminates need for ESR-based compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4470AGL-AEC1-Z | Omits OVP latch-off function; identical specs otherwise including AEC-Q100 Grade 1, RDS(on), and pinout. | Suitable where output overvoltage is managed upstream (e.g., by secondary supervisor IC), eliminating need for latch-off recovery. | Select when system-level fault handling already covers OVP, or when faster restart after transient overvoltage is required. |
| TPS54560QDGQRQ1 | Lower 4.5A rating, wider 3.5V–60V input, no integrated low-side FET (external sync rectifier required), different pinout. | Used in higher-input automotive systems (e.g., 48V mild-hybrid); lacks monolithic integration and footprint compatibility. | Choose only if input exceeds 36V or if external MOSFET control is preferred; not drop-in compatible. |
Compared with MPQ4470GL-AEC1-Z, the MPQ4470AGL-AEC1-Z removes latch-off OVP while retaining all other automotive-grade protections and performance, whereas TPS54560QDGQRQ1 trades monolithic integration for extended input range and requires redesign of gate drive and layout.
Availability
MPQ4470GL-AEC1-Z is available at Aetrix Electronics and suitable for automotive ADAS, infotainment, and telematics applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MPQ4470GL-AEC1-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 analog and power ICs, with over two decades of leadership in DC/DC conversion and motor control solutions.
The MPQ4470 product line targets automotive-grade power management, designed specifically to meet stringent AEC-Q100 reliability, thermal, and EMI requirements in safety-critical vehicle subsystems.
FAQ
What is the difference between MPQ4470GL-AEC1-Z and MPQ4470AGL-AEC1-Z?
The MPQ4470GL-AEC1-Z includes latch-off over-voltage protection (OVP), which forces shutdown until power cycle upon detecting >1.25×VREF at FB. The MPQ4470AGL-AEC1-Z omits this feature but is otherwise identical in specifications, pinout, and AEC-Q100 qualification. Both share the same 40mΩ/20mΩ MOSFETs, 5A rating, and 3mm×4mm QFN package.
Does MPQ4470GL-AEC1-Z support ceramic output capacitors without external compensation?
Yes, but only when using output capacitors with sufficient ESR (e.g., POSCAP or polymer types). For low-ESR ceramic capacitors, external ramp compensation (R4/C4) is required to ensure stability - per Equation 4 in the datasheet - because ceramic ESR alone does not provide adequate slope compensation for the current-mode controller.
What is the minimum recommended input capacitance for MPQ4470GL-AEC1-Z at 5A output?
For 5A output at VIN=12V and VOUT=3.3V, the calculated input ripple current is ~3.5A RMS. A minimum of 47μF X7R ceramic (rated ≥25V) placed directly at the IN pins is recommended. Use parallel 10μF + 22μF + 15μF stack with multiple vias to minimize ESL and ensure effective high-frequency decoupling.
How does the bootstrap circuit operate during low-duty-cycle conditions?
During low-duty-cycle (high-VOUT/VIN) operation, the BST–SW voltage headroom shrinks. The internal bootstrap refresh circuit activates when VBST–VSW falls below 2.3V, turning on the LS-FET to discharge the inductor and restore SW-to-GND potential - enabling VIN-to-BST charging. This allows reliable operation down to ~0.9×VIN output without external charge pump.
Can MPQ4470GL-AEC1-Z be used in non-automotive industrial applications?
Yes - its 4.5V–36V input range, 5A capability, and robust protection suite make it suitable for industrial PLCs, PoE-powered devices, and test equipment. However, the AEC-Q100 qualification adds cost and screening overhead; for non-automotive use, the standard MPQ4470GL-Z (non-AEC) may offer better value without sacrificing electrical performance.
What is the thermal resistance (θJA) of the QFN20 package under standard JEDEC 4-layer PCB conditions?
The datasheet specifies θJA = 48°C/W for the 3mm×4mm QFN20 package on a JEDEC-standard 4-layer PCB (JESD51-7). With proper thermal pad soldering to ≥4 cm² internal copper pour and ≥6 thermal vias, actual θJA can improve to ≤35°C/W in optimized layouts - enabling full 5A operation at +85°C ambient.
Is the PGOOD delay adjustable?
No - the PGOOD assertion delay is fixed at 500–900μs (typical 700μs) after FB reaches 90% of VREF, and the deassertion delay is similarly fixed when FB falls below 85% of VREF. This timing is internally generated and not user-configurable; external logic must accommodate this fixed latency for sequencing.
MPQ4470GL-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- 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):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 32.4V
- Current - Output:
- 5A
- Frequency - Switching:
- 100kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
MPQ4470GL-AEC1-Z FAQ
1.How can I place an order for MPQ4470GL-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4470GL-AEC1-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 MPQ4470GL-AEC1-Z reliable?
The price and inventory of MPQ4470GL-AEC1-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4470GL-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4470GL-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4470GL-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4470GL-AEC1-Z?
MPQ4470GL-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4470GL-AEC1-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 MPQ4470GL-AEC1-Z?
For technical support, including MPQ4470GL-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4470GL-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4470GL-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4470GL-AEC1-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 MPQ4470GL-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4470GL-AEC1-Z?
All MPQ4470GL-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4470GL-AEC1-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 MPQ4470GL-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4470GL-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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