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Monolithic Power Systems Inc. MPQ4570GF-AEC1
- Part No.:
- MPQ4570GF-AEC1
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MPQ4570GF-AEC1.pdf
- Description:
- IC REG BUCK ADJ 3A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,264
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Product details
Overview
MPQ4570GF-AEC1 from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, fully integrated synchronous step-down converter delivering 3A continuous output current with 4.5V–55V input range, peak-current-mode control, and programmable switching frequency up to 640kHz. It integrates 90mΩ high-side and 70mΩ low-side MOSFETs, supports external SYNC clock (100–1000kHz), and provides power-good indication and thermal shutdown - deployed in automotive infotainment power rails and PoE-powered industrial controllers.
For engineers reviewing the MPQ4570GF-AEC1 datasheet, MPQ4570GF-AEC1 pinout, MPQ4570GF-AEC1 application, or MPQ4570GF-AEC1 equivalent, key selection criteria include its AEC-Q100 qualification, valley-current-detection OCP, frequency scalability under light load, and BIAS pin-enabled efficiency optimization for 12V/24V/48V automotive and industrial DC bus systems.
Technical Context
The MPQ4570GF-AEC1 employs peak-current-mode PWM control with internal error amplifier transconductance of 430–730μA/V and COMP node dynamics enabling stable regulation across ceramic or polymer output capacitors without ESR dependency. Its oscillator supports resistor-programmed frequency (400–640kHz at RFREQ=100kΩ) or external SYNC synchronization with 100ns minimum pulse width tolerance.
It implements dual-stage overcurrent protection: cycle-by-cycle peak current limiting (3.9–7.5A) combined with valley current detection to prevent runaway inductor current, while OVP triggers immediate HS/LS shutdown at 108–122% of VFB and recovers autonomously below 103% VFB. Thermal shutdown activates at 150–170°C with 10°C hysteresis and auto-recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 55V - supports direct connection to 12V, 24V, and 48V automotive/industrial DC buses without pre-regulation. |
| Continuous Output Current | 3A - sustained delivery with integrated MOSFETs eliminates need for external power stages in compact 5V/3.3V rail generation. |
| Switching Frequency | 400–640kHz (programmable via FREQ pin resistor); scalable down to 5% nominal under light load - reduces switching loss and improves light-load efficiency. |
| Internal MOSFET RDS(on) | 90mΩ (HS) / 70mΩ (LS) - enables >92% typical efficiency at 12VIN/3.3VOUT/2A and minimizes board space vs discrete solutions. |
| OVP Threshold | 108–122% of 1.0V feedback reference - fast-acting fault response with automatic recovery avoids system latch-up during transient overvoltage events. |
| Thermal Shutdown | 150–170°C junction temperature with 10°C hysteresis - ensures reliable operation in sealed automotive ECUs and industrial enclosures without forced air. |
| Power Good Accuracy | ±5% hysteresis window (90% rising / 85% falling VFB threshold) - provides precise sequencing signal for microcontroller reset and system power management. |
Pinout & Package
The MPQ4570GF-AEC1 is housed in a thermally enhanced TSSOP-20 EP package with exposed pad for PCB-level heat dissipation (θJA = 45°C/W, θJC = 10°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 COMP | Compensation network node | Connects external RC network to set loop stability; directly drives error amplifier output for current-mode control. |
| 2 FB | Feedback input | Senses output voltage via resistive divider; referenced to 1.0V ±2% internal bandgap for accurate regulation. |
| 3 FREQ | Frequency programming/SYNC input | Resistor-to-GND sets fSW; accepts external 100–1000kHz clock for synchronized multi-rail systems. |
| 4 EN | Enable control | Active-high logic input (1.4–1.8V rising threshold); no internal pull-up - requires explicit biasing for deterministic startup. |
| 5 BST | Bootstrap supply | Charges external 0.1μF capacitor to drive high-side MOSFET gate; regulated at 4.2V with UVLO (2.3V, 300mV hysteresis). |
| 6–8 VIN | Main input power | High-current input pins accepting 4.5–55V; require local ceramic decoupling to suppress switching noise. |
| 10,11 SW | Switch node | Drives external inductor; connects to BST capacitor; voltage swings from GND to VIN during operation. |
| 13–15, Exposed Pad GND | Power ground | Low-impedance return path for high-side/low-side MOSFETs; must be soldered to large PCB copper area for thermal performance. |
| 16 VDD | Driver supply | Internally regulated at 3.6V (from VIN) or 4.8V (from BIAS ≥5.4V); powers LS gate driver and BST charging circuit. |
| 17 BIAS | Efficiency-optimized auxiliary supply | Accepts 3.3–5.5V external source to reduce quiescent loss; enables higher efficiency at light loads and elevated ambient temperatures. |
| 18 PG | Power good open-drain output | Signals valid regulation (high) when FB ≥90% VREF; pulls low on fault (FB ≤85% VREF) for system-level monitoring. |
| 19 SS | Soft-start timing | External capacitor sets ramp time (tSS ≈ CSS × 1V / 4μA); internal 500μs default if floating. |
| 20 AGND | Analog ground | Separate ground for error amplifier and reference circuits; must be star-connected to power GND near IC to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures (−40°C to +125°C junction), including HTOL, TC, and ESD testing per stress test plan. |
| Valley-current-detection OCP | Prevents inductor current runaway by disabling HS switch until valley current falls below threshold - critical for short-circuit survival. |
| BIAS pin efficiency mode | Reduces total power loss by powering internal regulators from external 3.3–5.5V source instead of VIN, improving light-load efficiency by ~5–8%. |
| Frequency foldback under light load | Switching frequency scales linearly from full rate down to 5% as FB drops below 25% VREF, minimizing switching loss at <10% load. |
| Integrated bootstrap regulator | Charges BST capacitor to 4.2V with dedicated PMOS pass transistor; includes UVLO (2.3V) and soft-start reset to ensure robust gate drive. |
Applications
| Automotive Infotainment Power Supply | PoE-Powered Industrial Controller |
|---|---|
|
Use Scenario: Generating stable 5V/3.3V rails from 12V/24V vehicle battery with cold-crank (4.5V) and load-dump (55V) tolerance. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with AEC-Q100 compliance, valley-OCP, and thermal shutdown for ASIL-B adjacent systems. Use Value: Eliminates need for external MOSFETs and gate drivers; BIAS pin enables efficient 5V rail generation from MCU's 5V LDO output. |
Use Scenario: Converting 48V PoE midspan output to isolated 12V/5V for PLC I/O modules and fieldbus gateways. IC Role / Device Role / Timing Role: Non-isolated buck stage upstream of isolated DC-DC; supports SYNC to align switching with downstream converters and reduce EMI. Use Value: Wide VIN accommodates PoE+ (57V max) derating; programmable fSW allows EMI tuning; PG signal enables remote power health monitoring. |
| Printer Engine Power Management | Distributed Automotive Body Control Unit |
|
Use Scenario: Powering stepper motor drivers and ASICs in laser printers with 24V/48V DC bus and burst-mode print cycles. IC Role / Device Role / Timing Role: High-efficiency buck converter with light-load frequency scaling and external soft-start for inrush control during wake-from-standby. Use Value: Valley-OCP prevents damage during motor stall; SS capacitor enables controlled 100ms ramp to avoid mechanical jerk in paper feed subsystems. |
Use Scenario: Local 3.3V rail generation in door module ECUs powered from 12V battery with stop-start cycling. IC Role / Device Role / Timing Role: AEC-Q100-compliant point-of-load regulator with UVLO hysteresis (400mV) to ride through 6V cranking dips without dropout. Use Value: Integrated HS/LS MOSFETs reduce BOM count; exposed pad enables conduction cooling in sealed plastic housings; PG signals MCU on valid rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5–65V input, 1.5A output, external MOSFETs required; no integrated low-side FET or BIAS pin. | Lacks AEC-Q100 Grade 1 rating; requires external gate drivers and compensation components - larger solution size. | Select when higher input voltage margin (>55V) is needed and design can accommodate discrete power stage layout. |
| TPS54560QDGQRQ1 | 3.5–60V input, 5A output, integrated FETs, but no valley-OCP or BIAS pin; fixed 500kHz fSW. | Higher current capability but lacks frequency scalability and efficiency-optimized auxiliary supply - less optimal for light-load automotive modules. | Choose when 5A output is mandatory and thermal headroom permits fixed-frequency operation without light-load optimization. |
Compared with LM5164QPWPRQ1 and TPS54560QDGQRQ1, the MPQ4570GF-AEC1 delivers superior integration (dual MOSFETs + BIAS + valley-OCP), tighter AEC-Q100 compliance, and adaptive frequency control - making it optimal for space-constrained, thermally demanding automotive and industrial buck applications requiring <3A output.
Availability
MPQ4570GF-AEC1 is available at Aetrix Electronics and suitable for automotive infotainment systems, PoE-powered industrial controllers, and printer engine power supplies requiring stable component supply with AEC-Q100 traceability and long-term production support.
Supply support for MPQ4570GF-AEC1 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 core expertise in DC-DC conversion, motor drivers, and LED lighting controllers.
The MPQ4570 belongs to MPS's automotive-grade synchronous buck converter product line, designed specifically for harsh-environment applications requiring AEC-Q100 qualification, wide-input operation, and integrated power stage reliability.
FAQ
What is the purpose of the BIAS pin, and how should it be used?
The BIAS pin allows external 3.3–5.5V supply to power internal regulators, reducing quiescent current and improving light-load efficiency by bypassing VIN-derived regulation. When unused, it must be floated or tied to GND; when connected, a 0.1–1μF decoupling capacitor is mandatory at the pin. This feature lowers thermal stress in sealed automotive modules.
How does valley-current-detection OCP differ from standard cycle-by-cycle current limit?
Valley-current detection monitors inductor current at the end of each switching cycle and disables the high-side MOSFET until valley current falls below a defined threshold. This prevents current runaway during output shorts or overload conditions where peak limiting alone may not sustain safe operation - a critical safety enhancement for automotive and industrial use.
Can the MPQ4570GF-AEC1 synchronize to an external clock, and what are the timing requirements?
Yes - the FREQ pin accepts external SYNC clocks from 100kHz to 1MHz. The signal must have HIGH ≥1.5V and LOW ≤1V, with pulse width ≥100ns to overcome parasitic capacitance. SYNC alignment reduces beat frequencies and EMI in multi-rail systems, and is validated per AEC-Q100 EMC test plans.
What is the minimum recommended input capacitance, and why is it critical?
A minimum 10μF ceramic capacitor with low ESR must be placed within 5mm of VIN and GND pins. This suppresses high-frequency switching noise and prevents voltage droop during transient load steps. Insufficient input capacitance causes erratic EN behavior, COMP oscillation, and premature UVLO triggering - especially during cold-crank conditions.
How does the soft-start function interact with output short-circuit recovery?
During output short, FB collapses, discharging the SS capacitor. Once the short is removed, SS recharges externally (or defaults to 500μs), forcing a full soft-start sequence before regulation resumes. This prevents inrush current damage to the inductor and output capacitors, and is confirmed in AEC-Q100 stress testing for repeated fault recovery.
Is thermal performance affected by PCB layout, and what is the recommended copper area for the exposed pad?
Yes - the exposed pad (pins 13–15 + thermal pad) must be soldered to ≥200mm² of inner/outer layer copper connected via ≥6 thermal vias (0.3mm diameter) to internal ground planes. This achieves the specified θJA = 45°C/W; insufficient copper raises junction temperature by >25°C at 3A load, risking thermal shutdown in enclosed environments.
What happens to switching frequency during light-load operation, and how is it controlled?
When FB voltage drops below 25% of VREF, fSW begins scaling linearly downward; at zero FB, frequency reaches 5% of nominal value. This is internally controlled by COMP voltage level - no external circuitry required. Frequency foldback reduces switching loss and improves efficiency from 65% at 10mA to >85% at 100mA load.
MPQ4570GF-AEC1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- 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):
- 55V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 49.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 520kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
MPQ4570GF-AEC1 FAQ
1.How can I place an order for MPQ4570GF-AEC1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4570GF-AEC1 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 MPQ4570GF-AEC1 reliable?
The price and inventory of MPQ4570GF-AEC1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4570GF-AEC1 is usually 5 days.
3.What payment methods are accepted for MPQ4570GF-AEC1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4570GF-AEC1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4570GF-AEC1?
MPQ4570GF-AEC1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4570GF-AEC1 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 MPQ4570GF-AEC1?
For technical support, including MPQ4570GF-AEC1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4570GF-AEC1 requirements.
6.How does Aetrix verify that MPQ4570GF-AEC1 is sourced from the original manufacturer or authorized distributors?
All MPQ4570GF-AEC1 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 MPQ4570GF-AEC1 meets industry standards.
7.What is the process for return or replacement of MPQ4570GF-AEC1?
All MPQ4570GF-AEC1 units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4570GF-AEC1, 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 MPQ4570GF-AEC1 part is unused and in its original packaging.
Return procedure for MPQ4570GF-AEC1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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