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Monolithic Power Systems Inc. MPQ4570GF-P
- Part No.:
- MPQ4570GF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MPQ4570GF-P.pdf
- Description:
- IC REG BUCK ADJ 3A 20TSSOPF
- Quantity:
- Payment:
- Shipping:
Inventory:2,991
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Product details
Overview
MPQ4570GF-P from Monolithic Power Systems is a fully integrated, AEC-Q100 Grade 1 qualified 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 and supports external SYNC, soft-start, power-good indication, and valley-current-based OCP-designed for automotive power systems, PoE-powered industrial equipment, and high-voltage printer DC-DC rails.
For engineers reviewing the MPQ4570GF-P datasheet, MPQ4570GF-P pinout, MPQ4570GF-P application, or MPQ4570GF-P equivalent, key selection considerations include its wide VIN range, thermal foldback during short-circuit, BIAS-powered VDD regulation for efficiency optimization, and TSSOP-20 EP package with exposed pad for enhanced thermal performance in space-constrained automotive and industrial designs.
Technical Context
The MPQ4570GF-P employs peak-current-mode control with internal error amplifier transconductance of 430–730μA/V and COMP node dynamics enabling stable loop compensation across varied output capacitors. Its oscillator supports resistor-programmed frequencies (100–1000kHz) or external SYNC clock synchronization with 100ns minimum pulse width tolerance.
Light-load operation features automatic frequency scaling (down to 5% nominal fSW) and zero-current detection to disable low-side MOSFET conduction-reducing driver loss and improving efficiency below ~200mA load. Thermal shutdown triggers at 150°C–170°C with 10°C hysteresis, and OVP activates at 108–122% of FB reference (1V), forcing immediate HS/LS shutdown and PG assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 55V - supports direct connection to automotive battery (12V/24V), PoE+ (57V), and industrial HV DC buses without pre-regulation. |
| Continuous Output Current | 3A - sustained delivery under full thermal design margin at TA ≤ 85°C with TSSOP-20 EP and proper PCB copper area. |
| Switching Frequency | Programmable 100–1000kHz via FREQ pin resistor or external SYNC - enables EMI tuning and inductor size optimization. |
| Internal MOSFET RDS(on) | 90mΩ (HS) / 70mΩ (LS) - enables >92% efficiency at 12V→3.3V/2A with minimal external component count. |
| Feedback Reference Voltage | 0.98V to 1.02V - tight 2% tolerance ensures ±1.5% output voltage accuracy over line/load/temperature. |
| Power Good Threshold | 90% rising / 85% falling of VFB - provides clean, hysteresis-enabled system power sequencing signal with 8–37μs delay. |
| OCP Mechanism | Valley-current detection + peak-current limit - prevents runaway inductor current during startup or overload while reducing thermal stress during output short. |
Pinout & Package
The MPQ4570GF-P is housed in a thermally enhanced TSSOP-20 EP package with exposed pad (pins 13–15 and exposed pad) for direct PCB thermal vias. Pin 1 is COMP; pin 2 is FB; pin 3 is FREQ; pin 4 is EN; pins 6–8 are VIN; pins 10–11 are SW; pins 13–15 and exposed pad are GND; pin 16 is VDD; pin 17 is BIAS; pin 18 is PG; pin 19 is SS; pin 20 is AGND. Pins 9 and 12 are NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 COMP | Compensation network node | Connects external RC network to set loop bandwidth and phase margin; directly drives PWM comparator threshold. |
| 2 FB | Output voltage feedback input | Senses divided output voltage; compares against 1V reference to regulate output with ±2% accuracy. |
| 3 FREQ | Frequency programming / SYNC input | Resistor-to-GND sets fSW; external 100–1000kHz clock overrides internal oscillator with edge-triggered sync. |
| 4 EN | Enable control input | Active-high logic: ≥1.6V enables regulator; ≤1.3V disables with 300mV hysteresis; no internal pull-up/down. |
| 5 BST | Bootstrap supply for high-side gate driver | Connects 0.1μF capacitor to SW; internal regulator charges BST to 4.2V for floating HS gate drive. |
| 6–8 VIN | Main input power supply | Accepts 4.5–55V; powers internal regulators, drivers, and logic; requires local ceramic decoupling. |
| 10–11 SW | Switch node | Drives external inductor; connects internally to HS drain and LS source; high dv/dt node requiring careful layout. |
| 13–15, Exposed Pad GND | Power ground return path | Low-impedance return for HS/LS MOSFET currents; must be connected to large PCB copper pour with multiple thermal vias. |
| 16 VDD | Internal driver and BST charging supply | Regulated at 3.6V (from VIN) or 4.8V (from BIAS); powers gate drivers and bootstrap circuitry. |
| 17 BIAS | External bias supply input | Connect to 3.3–5.5V source to improve efficiency and reduce thermal load on VIN-to-VDD LDO. |
| 18 PG | Open-drain power-good indicator | Asserts low during startup/fault; pulls high when VOUT reaches 90% target; enables system power sequencing. |
| 19 SS | Soft-start timing control | External capacitor sets ramp time; internal 500μs default; overrides reference during startup to limit inrush. |
| 20 AGND | Analog ground reference | Separate ground for FB/COMP/EN/PG circuits; must be star-connected to power GND near IC to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range (4.5V–55V) | Enables single-supply operation across 12V/24V/48V automotive, industrial, and PoE systems without intermediate stages. |
| Integrated 90mΩ HS / 70mΩ LS MOSFETs | Reduces BOM count by eliminating external switches; lowers conduction loss and improves thermal footprint vs. controller-only solutions. |
| Valley-current-detection OCP | Prevents inductor saturation and thermal runaway during overload or short-circuit while maintaining cycle-by-cycle protection. |
| BIAS-powered VDD regulation | Improves full-load efficiency by 1–2% and reduces junction temperature by shifting VDD supply from VIN LDO to external 5V rail. |
| Programmable light-load frequency scaling | Reduces switching loss at <200mA loads by dynamically lowering fSW down to 5% of nominal, extending battery life in standby modes. |
Applications
| Automotive Infotainment Power Supply | PoE-Powered Industrial Sensor Hub |
|---|---|
|
Use Scenario: Converts 12V/24V vehicle battery to stable 3.3V/5V for MCU, display, and audio codecs in head units. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with AEC-Q100 Grade 1 qualification, thermal foldback, and UVLO for cold-crank immunity. Use Value: Eliminates need for external MOSFETs and discrete protection; maintains regulation during 4.5V battery dips and 55V load-dump transients. |
Use Scenario: Steps down 48–57V PoE++ input to 12V/5V for distributed sensors, PLC I/O modules, and fieldbus gateways. IC Role / Device Role / Timing Role: High-input-voltage buck converter with SYNC capability to align switching with system clock and reduce EMI in dense PCB layouts. Use Value: Supports direct PoE interface without pre-regulator; programmable fSW avoids noise coupling into analog sensor signals. |
| Thermal-Managed Printer Engine PSU | Industrial DC Motor Drive Auxiliary Rail |
|
Use Scenario: Generates 15V/3A for stepper motor drivers and 3.3V for control logic in laser printers and multifunction copiers. IC Role / Device Role / Timing Role: High-efficiency, thermally robust buck converter with valley-current OCP to survive repeated short-circuit events during paper jams. Use Value: Current-limit foldback during output short reduces thermal dissipation by >40%, preventing shutdown during transient faults. |
Use Scenario: Supplies isolated gate-driver bias and microcontroller core voltage from 24V/48V industrial bus in servo drives and inverters. IC Role / Device Role / Timing Role: Compact, high-reliability buck regulator with PG output for safe startup sequencing and fault reporting to main controller. Use Value: Power-good signal enables coordinated enable/disable of gate drivers and logic, preventing shoot-through during power transitions. |
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 |
|---|---|---|---|
| MPQ4572GF-P | Higher 5A rating, same 4.5–55V range, identical pinout and feature set except increased current capability. | Better suited for higher-power motor control or multi-rail systems where 3A margin is insufficient. | Select when output current demand exceeds 3A but board layout and thermal constraints allow same footprint. |
| LM5164QPWPRQ1 | 4.5–65V input, 1A output, external MOSFETs required, no integrated low-side switch, different control architecture (current-mode with slope compensation). | Used where adjustable current limit, ultra-low IQ (<15μA), or higher VIN tolerance is prioritized over integration. | Choose only if system requires sub-1A output or needs to optimize for ultra-low quiescent current in always-on automotive modules. |
Compared with MPQ4572GF-P, the MPQ4570GF-P offers tighter thermal management at 3A with lower RDS(on) per amp and reduced PCB area; versus LM5164QPWPRQ1, it delivers full integration and higher current in the same TSSOP-20 EP package but trades off ultra-low IQ and extended VIN range.
Availability
MPQ4570GF-P is available at Aetrix Electronics and suitable for automotive infotainment systems, PoE-powered industrial sensor hubs, and thermal-managed printer engine power supplies requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MPQ4570GF-P 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 expertise in DC-DC conversion, motor drivers, and LED lighting controllers.
The MPQ4570 belongs to MPS's automotive-qualified MPQ series of fully integrated synchronous buck converters, designed specifically for harsh-environment applications demanding AEC-Q100 reliability, wide input range, and robust protection features.
FAQ
What is the maximum allowable input voltage for MPQ4570GF-P, and what happens above that limit?
The absolute maximum VIN is 60V. Operation above 55V violates recommended conditions and risks exceeding internal MOSFET breakdown limits. At 60V, the high-side MOSFET's VDS rating is approached, and prolonged exposure may cause premature failure. The device includes VIN UVLO (rising threshold 3.7–4.1V, falling 3.3–3.7V) but no overvoltage clamping-external TVS or crowbar protection is required for load-dump transients beyond 55V.
How does the BIAS pin improve efficiency, and what voltage range is supported?
The BIAS pin supplies the internal VDD regulator when driven between 3.3V and 5.5V, bypassing the VIN-to-VDD LDO and reducing power dissipation. At 5V BIAS, VDD regulates to 4.8V (600mV drop), cutting quiescent loss by ~30% versus VIN-powered mode. Efficiency gain is most pronounced at high VIN (e.g., 48V→5V), where LDO dropout loss dominates; BIAS must be decoupled with 0.1–1μF ceramic capacitor.
Can MPQ4570GF-P operate without an external soft-start capacitor?
Yes-the device includes an internal 500μs soft-start timer. Leaving SS pin floating activates this default. An external capacitor extends soft-start time linearly: tSS ≈ (CSS × 1V) / 4μA. For example, 100nF yields ~25ms ramp. Internal soft-start remains active even if external capacitor is omitted, ensuring controlled startup and inrush limiting in all configurations.
What is the purpose of valley-current detection in over-current protection?
Valley-current detection monitors inductor current at the end of each switching cycle to prevent "current runaway" during overload or short-circuit. Unlike peak-current limiting alone, it ensures the low-side MOSFET remains off until inductor current falls below a safe threshold-avoiding uncontrolled current buildup and reducing thermal stress during sustained faults. This feature is critical for printer and motor applications with frequent short-circuit events.
Is MPQ4570GF-P pin-compatible with other MPQ-series buck converters?
No-MPQ4570GF-P uses a unique TSSOP-20 EP pinout optimized for its dual-MOSFET integration and BIAS functionality. MPQ4572GF-P shares identical pinout and footprint, enabling drop-in upgrade to 5A, but MPQ4420A or MPQ4470 use different packages (SOIC-8, QFN) and incompatible pin assignments. Always verify pin functions using the official MPQ4570 Rev. 1.05 datasheet before substitution.
How does frequency scaling behave under light load, and what is its impact on output ripple?
When COMP voltage drops below ~0.8V, MPQ4570GF-P begins scaling fSW downward; below ~0.7V, switching pauses entirely. Minimum fSW is 5% of programmed value (e.g., 25kHz from 500kHz setting). Ripple increases at lower frequencies due to larger ΔIL, but valley-current detection and forced CCM at medium loads maintain regulation. For low-noise applications, fixed-frequency mode is recommended via SYNC or disabling light-load mode.
What thermal design guidance applies to the TSSOP-20 EP package?
The exposed pad (pins 13–15 + thermal pad) must connect to ≥4 cm² of 2oz copper with ≥6 thermal vias (0.3mm diameter) to internal ground planes. θJA is 45°C/W on 4-layer JEDEC PCB; derating begins above 85°C ambient. For 3A continuous output, keep junction temperature ≤125°C using this layout-exceeding 150°C triggers thermal shutdown with 10°C hysteresis.
MPQ4570GF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) 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):
- 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-TSSOPF-EP
MPQ4570GF-P FAQ
1.How can I place an order for MPQ4570GF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4570GF-P 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-P reliable?
The price and inventory of MPQ4570GF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4570GF-P is usually 5 days.
3.What payment methods are accepted for MPQ4570GF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4570GF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4570GF-P?
MPQ4570GF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4570GF-P 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-P?
For technical support, including MPQ4570GF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4570GF-P requirements.
6.How does Aetrix verify that MPQ4570GF-P is sourced from the original manufacturer or authorized distributors?
All MPQ4570GF-P 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-P meets industry standards.
7.What is the process for return or replacement of MPQ4570GF-P?
All MPQ4570GF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4570GF-P, 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-P part is unused and in its original packaging.
Return procedure for MPQ4570GF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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