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Monolithic Power Systems Inc. MPQ4570GF-Z
- Part No.:
- MPQ4570GF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MPQ4570GF-Z.pdf
- Description:
- IC REG BUCK ADJ 3A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,045
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Product details
Overview
MPQ4570GF-Z 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 (100–1000 kHz). It integrates 90mΩ high-side and 70mΩ low-side MOSFETs, supports external SYNC clock, and provides power good (PG) indication - deployed in automotive power systems, PoE-powered industrial equipment, and high-voltage printer DC-DC rails.
For engineers reviewing the MPQ4570GF-Z datasheet, MPQ4570GF-Z pinout, MPQ4570GF-Z application, or MPQ4570GF-Z equivalent, key selection considerations include its valley-current-detection OCP, adaptive light-load frequency scaling, BIAS-pin-enabled thermal optimization, and TSSOP-20 EP package with exposed pad for enhanced thermal performance.
Technical Context
The MPQ4570GF-Z employs peak current mode control with internal error amplifier (transconductance 430–730 µA/V) and programmable oscillator referenced to FREQ pin resistor (e.g., 102 kΩ sets 500 kHz). Its PWM cycle initiates on internal clock edge, with minimum on-time (90 ns) and off-time (100 ns) enforced to maintain stability at high duty cycles.
It features dual-regulation architecture: a 2.5V internal regulator powers logic circuits, while VDD (3.6V or 4.8V) supplies gate drivers and BST charging circuit - selectable via BIAS pin voltage (≥4.2V enables higher-efficiency BIAS-powered operation). Thermal shutdown triggers at 150–170°C with 10°C hysteresis, and OVP activates at 108–122% of 1V reference.
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 48V bus without pre-regulation. |
| Output Current | 3A continuous - sustained under full load at TJ ≤ 125°C with proper PCB thermal design and exposed pad soldering. |
| Switching Frequency | Programmable 100–1000 kHz via FREQ pin resistor - enables EMI optimization and inductor size trade-off (e.g., 500 kHz typical for 10 µH). |
| Internal MOSFET RDS(on) | 90 mΩ (HS) / 70 mΩ (LS) - reduces conduction loss and eliminates need for external power switches or freewheeling diode. |
| Feedback Reference | 1.0 V ±2% - enables precise output regulation (e.g., 3.3V via 10kΩ/4.32kΩ divider) with <50 nA FB bias current minimizing divider error. |
| Power Good Threshold | 90% VREF rising / 85% VREF falling - provides clean, hysteresis-controlled system power sequencing signal with 8–37 µs delay. |
| OCP Mechanism | Valley-current detection + foldback - limits peak current to 3.9–7.5 A and reduces current limit during short-circuit to improve thermal survival. |
Pinout & Package
The MPQ4570GF-Z is housed in a thermally enhanced TSSOP-20 EP package with 0.65 mm pitch and exposed thermal pad (pins 13,14,15, and exposed pad) requiring solder paste stencil and reflow profile optimized for thermal pad void minimization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 COMP | Compensation node | Connects external RC network to set loop stability; output of error amplifier driving PWM comparator threshold. |
| 2 FB | Feedback input | Senses divided output voltage; referenced to 1.0 V internal bandgap - determines regulated output accuracy and transient response. |
| 3 FREQ | Frequency programming/SYNC input | Resistor-to-GND sets fSW; externally applied clock (100–1000 kHz) overrides internal oscillator for system-level synchronization. |
| 4 EN | Enable control | Logic-level input (1.4–1.8 V rising threshold); no internal pull-up - must be actively driven to avoid undefined startup state. |
| 5 BST | Bootstrap supply | Charges via external 0.1 µF capacitor to SW; powers high-side gate driver - requires low-ESR ceramic and tight layout to sustain >4.2 V. |
| 6,7,8 VIN | Main input supply | Accepts 4.5–55 V; feeds internal regulators and power switches - requires local 10 µF ceramic + bulk capacitor near pins to suppress switching noise. |
| 10,11 SW | Switch node | Drives external inductor; connects to BST capacitor - high dv/dt node demanding minimized trace area and guard ring for EMI control. |
| 13,14,15, Exposed Pad GND | Power ground | Low-impedance return path for high-side/low-side MOSFET currents - must be solidly connected to thermal pad and main GND plane. |
| 16 VDD | Driver supply | 3.6 V (VIN-powered) or 4.8 V (BIAS-powered); powers LS driver and BST charge pump - decoupled with 1 µF ceramic. |
| 17 BIAS | Efficiency-optimized bias supply | Accepts 3.3–5.5 V external source to reduce quiescent loss and improve thermal margin - floating or GND if unused. |
| 18 PG | Power good open-drain | Signals valid output after soft-start; requires external pull-up (e.g., 100 kΩ to VDD) - asserts low on OVP/OCP/UVLO faults. |
| 19 SS | Soft-start timing | External capacitor sets ramp time (tSS ≈ CSS × 1V / 4 µA); internal 500 µs default if floating - prevents inrush current and output overshoot. |
| 20 AGND | Analog ground | Reference for FB, COMP, and error amplifier - separated from power GND to minimize noise coupling into feedback path. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 4.5V–55V operation enables single-BOM support across 12V automotive, 24V industrial, and 48V PoE systems without input pre-regulators. |
| Integrated high- and low-side MOSFETs | 90 mΩ HS / 70 mΩ LS RDS(on) eliminates external switch losses and reduces bill-of-materials by two power components and one diode. |
| Valley-current-detection overcurrent protection | Detects inductor current zero-crossing to prevent runaway during overload - improves reliability versus peak-only OCP in short-circuit conditions. |
| Adaptive light-load frequency scaling | Switching frequency drops to 5% of nominal when FB < 25% × RFE - reduces switching loss and maintains >85% efficiency at 10 mA load. |
| BIAS pin for thermal optimization | Enables external 3.3–5.5 V supply to power internal regulators - lowers junction temperature by up to 15°C vs. VIN-only operation at full load. |
| AEC-Q100 Grade 1 qualification | Rated for -40°C to +125°C ambient operation with validated HTOL, TC, and ESD performance - suitable for under-hood automotive applications. |
Applications
| Automotive Body Control Module | PoE-Powered Industrial Camera |
|---|---|
|
Use Scenario: Supplies 3.3V/2.5A to MCU, CAN transceiver, and sensor interface in vehicle door module with 9–16V battery input and load dump transients. IC Role / Device Role / Timing Role: Primary buck regulator providing stable, sequenced power with PG assertion for microcontroller reset coordination. Use Value: AEC-Q100 Grade 1 rating ensures operation at 125°C junction; 55V absolute max withstands ISO 7637-2 pulse 5a (110V); valley-OCP prevents thermal runaway during motor stall events. |
Use Scenario: Converts 48V PoE+ input to 5V/3A for image sensor, ISP, and Ethernet PHY in factory-floor vision system with strict EMI limits. IC Role / Device Role / Timing Role: Non-isolated buck stage enabling compact, cost-effective power architecture without transformer or optocoupler. Use Value: Programmable 500 kHz switching allows EMI filtering below CISPR 32 Class B limit; SYNC input enables deterministic noise placement across multiple cameras. |
| Industrial Printer Main Logic Rail | Automotive ADAS Radar Supply |
|
Use Scenario: Generates 1.2V/3A for FPGA and 3.3V/2A for interface ICs from 24V DC bus in high-speed label printer with frequent start-stop cycles. IC Role / Device Role / Timing Role: Dual-output capable via cascaded configuration; SS pin enables controlled ramp-up to avoid paper jam-triggering inrush. Use Value: External soft-start capacitor (e.g., 100 nF) sets 25 ms ramp time - limits inrush to <1.5× rated current and avoids brownout on shared 24V rail. |
Use Scenario: Powers 1.8V/2A RF transceiver and 3.3V/1.5A DSP in 77 GHz radar ECU with stringent thermal and reliability requirements. IC Role / Device Role / Timing Role: High-efficiency intermediate buck supplying low-noise LDO inputs - operates continuously at 85°C ambient. Use Value: BIAS pin connected to 3.3V LDO output reduces quiescent current by 40% and lowers die temperature by 12°C - extends lifetime per JEDEC JEP47. |
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 switch. | Lacks integrated low-side MOSFET and valley-OCP - requires additional components and offers lower efficiency at 3A load. | Select only if >65V input or discrete MOSFET control is mandatory; not drop-in for MPQ4570GF-Z footprint or thermal design. |
| TPS54560QDGQRQ1 | 3.5–60V input, 5A output, but non-synchronous (external diode); no BIAS pin or valley-OCP. | Higher conduction loss due to external Schottky; lacks adaptive frequency scaling and thermal-optimized bias option. | Consider only for cost-sensitive designs where 5A headroom justifies larger solution size and reduced light-load efficiency. |
Compared with LM5164QPWPRQ1 and TPS54560QDGQRQ1, the MPQ4570GF-Z delivers higher integration (dual MOSFETs), superior thermal management (BIAS pin), and more robust protection (valley-OCP + foldback), making it optimal for space-constrained, high-reliability 3A automotive and industrial buck applications.
Availability
MPQ4570GF-Z is available at Aetrix Electronics and suitable for automotive body control modules, PoE-powered industrial cameras, and industrial printer logic rails requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MPQ4570GF-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 20 years of 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 demanding AEC-Q100 qualification, wide input range, and integrated thermal protection.
FAQ
What is the maximum allowable input voltage for continuous operation?
The MPQ4570GF-Z is rated for continuous operation up to 55V input; its absolute maximum VIN rating is 60V. Operation above 55V violates recommended conditions and risks premature failure due to overstress on internal MOSFETs and gate drivers, even if within absolute max limits.
Can the MPQ4570GF-Z operate without an external soft-start capacitor?
Yes - the device includes an internal 500 µs soft-start timer. If the SS pin is left floating, the internal timer activates automatically. An external capacitor is only required when longer ramp times (e.g., ≥10 ms) are needed to coordinate with system power sequencing or limit inrush on weak input sources.
How does the BIAS pin improve thermal performance?
When a 3.3–5.5 V external supply is applied to BIAS, the internal 2.5 V and VDD regulators draw power from it instead of VIN, reducing power dissipation in the input-stage LDO and gate drivers. This lowers junction temperature by up to 15°C at full load, directly extending reliability per Arrhenius model.
Is the MPQ4570GF-Z pin-compatible with other MPQ4570 variants?
Yes - MPQ4570GF-Z (commercial grade) and MPQ4570GF-AEC1-Z (AEC-Q100 Grade 1) share identical pinout, package, and electrical specifications except for extended temperature validation and screening. Both use TSSOP-20 EP and support identical external component values and layout.
What happens during output short-circuit condition?
Under output short, valley-current detection forces immediate shutdown of both MOSFETs, and the current limit folds back to 50% of nominal value. The device remains latched off until the short is removed and soft-start reinitiates - preventing thermal runaway and enabling safe auto-recovery in intermittent fault scenarios.
Does the MPQ4570GF-Z require a minimum load for regulation stability?
No - the device uses peak current mode control with slope compensation and maintains stable regulation down to zero load. Light-load frequency scaling and low-side MOSFET disablement ensure no minimum load requirement, unlike voltage-mode controllers that may oscillate at ultra-light loads.
How is thermal shutdown recovery implemented?
Thermal shutdown activates at 150–170°C junction temperature and releases hysteresis at ~160°C. Upon cooling, the device resumes normal operation without requiring EN toggle or power cycle - enabling autonomous recovery in thermally constrained enclosures with passive cooling.
MPQ4570GF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
MPQ4570GF-Z FAQ
1.How can I place an order for MPQ4570GF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4570GF-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 MPQ4570GF-Z reliable?
The price and inventory of MPQ4570GF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4570GF-Z is usually 5 days.
3.What payment methods are accepted for MPQ4570GF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4570GF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4570GF-Z?
MPQ4570GF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4570GF-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 MPQ4570GF-Z?
For technical support, including MPQ4570GF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4570GF-Z requirements.
6.How does Aetrix verify that MPQ4570GF-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4570GF-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 MPQ4570GF-Z meets industry standards.
7.What is the process for return or replacement of MPQ4570GF-Z?
All MPQ4570GF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4570GF-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 MPQ4570GF-Z part is unused and in its original packaging.
Return procedure for MPQ4570GF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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