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Monolithic Power Systems Inc. MPQ4420HGJ-Z
- Part No.:
- MPQ4420HGJ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MPQ4420HGJ-Z.pdf
- Description:
- IC REG BUCK ADJ 2A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,694
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Product details
Overview
MPQ4420HGJ-Z from Monolithic Power Systems is a high-efficiency, AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter delivering up to 2A continuous output current with 4V–36V input range, 0.8V adjustable output voltage, and integrated 90mΩ/55mΩ MOSFETs - deployed in automotive power rails and industrial control systems.
For engineers reviewing the MPQ4420HGJ-Z datasheet, MPQ4420HGJ-Z pinout, MPQ4420HGJ-Z application, or MPQ4420HGJ-Z equivalent, key selection considerations include cold-crank duty cycle support (≥92%), 410kHz default switching frequency with external sync capability (200kHz–2.2MHz), power-good signaling, thermal shutdown (170°C), and TSOT23-8 package constraints for high-density PCB layout.
Technical Context
The MPQ4420HGJ-Z employs peak-current-mode control with internal compensation, enabling stable regulation across wide line/load variations without external loop components. Its current-mode architecture delivers fast transient response and simplifies stability design for 3.3V/5V point-of-load applications.
It integrates dual MOSFETs with low RDS(ON), a bootstrap driver with dedicated UVLO (2.2V), and a 5V internal bias regulator powered from VIN - supporting operation down to 4V while maintaining full functionality during automotive cold-crank conditions (VIN ≥ 4V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports full automotive battery range including cold-crank (≥4V) and load-dump transients. |
| Output Current | 2A continuous - sufficient for MCU cores, sensors, and CAN transceivers in automotive ECUs. |
| Switching Frequency | Default 410kHz, synchronizable 200kHz–2.2MHz - enables EMI optimization and inductor size reduction. |
| Feedback Reference | 0.792V ±12mV - sets precise output voltage via external resistor divider; enables 0.8V minimum VOUT. |
| Thermal Shutdown | 170°C activation, 30°C hysteresis - protects against sustained overload or poor heatsinking in sealed enclosures. |
| Power Good Threshold | 90% of VFB rising, 84% falling - provides accurate rail-valid indication with 90μs delay for system sequencing. |
| EN Threshold | 1.4V typical rising, 1.25V falling - ensures robust enable/disable control with 150mV hysteresis against noise. |
Pinout & Package
MPQ4420HGJ-Z is housed in an 8-pin TSOT23 package (2.9mm × 1.6mm × 0.85mm), optimized for space-constrained automotive and industrial PCBs with exposed thermal pad not present - thermal performance relies on copper area under GND and IN/SW traces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PG | Open-drain power-good indicator | Pulled low at startup; goes high after VOUT reaches 90% of target with 90μs delay - used for processor reset or downstream enable sequencing. |
| 2 IN | Main input supply connection | Accepts 4V–36V; requires low-ESR ceramic capacitor placed adjacent to pin to suppress high-frequency switching noise. |
| 3 SW | Switch node output | Drives external inductor; high di/dt node requiring short/wide trace routing away from analog signals like FB. |
| 4 GND | System ground reference | Primary return path for power and feedback; must connect to large copper pour with multiple vias for thermal and noise control. |
| 5 BST | Bootstrap supply for high-side gate driver | Requires 0.1μF–1μF capacitor between BST and SW; 20Ω series resistor recommended to damp ringing. |
| 6 EN/SYNC | Dual-function digital control pin | High >1.4V enables IC; external clock 200kHz–2.2MHz applied here synchronizes switching frequency. |
| 7 VCC | Bias supply for internal circuitry | Internally regulated ~5V output; decoupled with 0.1μF–0.22μF ceramic cap placed directly at pin. |
| 8 FB | Voltage feedback input | Compares output divider voltage to 0.792V reference; sensitive node requiring shortest possible trace to minimize noise pickup. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 90mΩ HS / 55mΩ LS MOSFETs eliminate external diode losses - improves full-load efficiency by ≥8% vs. asynchronous designs. |
| Automotive cold-crank support | 92–95% max duty cycle enables regulation down to VIN = 4V while maintaining VOUT - critical for engine start-up in 12V systems. |
| Frequency synchronization | EN pin accepts 200kHz–2.2MHz external clock - allows EMI spread-spectrum alignment across multi-rail power systems. |
| Comprehensive fault protection | OCP with hiccup mode, thermal shutdown (170°C), UVLO (3.5V rising), and PG monitoring - reduces need for external supervision ICs. |
| Internal soft-start | 1.5ms fixed ramp time - prevents inrush current and output overshoot during power-up without external components. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
Use Scenario: Powering microcontrollers, LIN transceivers, and sensor interfaces in door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck regulator supplying core logic and communication peripherals. Use Value: AEC-Q100 Grade 1 qualification ensures reliability across –40°C to +125°C ambient; cold-crank support maintains operation during engine cranking. | Use Scenario: Generating isolated 5V rails for digital I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Compact, high-input-range buck converter replacing discrete solutions in DIN-rail mounted enclosures. Use Value: 36V max input accommodates 24V industrial bus with margin; TSOT23-8 footprint saves board space versus SOIC-8 alternatives. |
| Distributed Automotive ADAS Camera Power | Ruggedized Telematics Unit Power |
Use Scenario: Providing clean 1.8V/3.3V supplies to image signal processors and MIPI interfaces in surround-view cameras. IC Role / Device Role / Timing Role: Secondary buck stage stepping down from 5V or 12V intermediate rail to low-voltage domain. Use Value: Low 70ns minimum on-time enables high VIN/VOUT ratios (e.g., 12V→1.8V at 410kHz); PG signal validates rail before ISP initialization. | Use Scenario: Powering GPS/GNSS receivers, cellular modems, and flash memory in vehicle tracking units exposed to vibration and temperature extremes. IC Role / Device Role / Timing Role: Main 3.3V system rail generator with hiccup-mode OCP for short-circuit resilience in unattended deployments. Use Value: Thermal shutdown + hiccup mode prevents latch-up during connector faults; AEC-Q100 compliance ensures field longevity. |
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 |
|---|---|---|---|
| LM61480RQR | 4.5V–36V input, 8A output, 2.1MHz fixed frequency, no internal BST resistor recommendation | Higher current capacity; targets larger loads like infotainment SoCs rather than sub-2A domains | Select when >3A output or higher switching frequency is required; requires external BST damping design. |
| TPS54240DGQR | 3.5V–42V input, 2.5A output, 100kHz–2.5MHz sync range, no AEC-Q100 qualification | Lacks automotive qualification; wider input range but lower efficiency at light load due to non-synchronous rectification | Choose for cost-sensitive industrial use where AEC-Q100 is not mandated; verify thermal performance at full load. |
Compared with LM61480RQR and TPS54240DGQR, the MPQ4420HGJ-Z uniquely balances AEC-Q100 Grade 1 compliance, compact TSOT23-8 packaging, and cold-crank capability - making it optimal for space- and reliability-constrained 2A automotive subsystems where qualification and footprint are decisive.
Availability
MPQ4420HGJ-Z is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and distributed ADAS camera modules requiring stable component supply across extended temperature and lifecycle demands.
Supply support for MPQ4420HGJ-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ4420H product line delivers AEC-Q100 qualified DC/DC converters targeting automotive subsystems requiring high input voltage tolerance, cold-crank operation, and compact packaging - emphasizing reliability, integration, and ease of layout in harsh environments.
FAQ
What is the minimum input voltage required for MPQ4420HGJ-Z to regulate output during cold-crank?
The MPQ4420HGJ-Z maintains regulation down to 4V input, with a maximum duty cycle of 92–95%, enabling stable 3.3V or 5V output during automotive engine cranking events where battery voltage dips below 6V. This is validated per AEC-Q100 Grade 1 requirements across –40°C to +125°C junction temperature.
Can MPQ4420HGJ-Z synchronize to an external clock, and what is the supported frequency range?
Yes - the EN/SYNC pin accepts an external clock signal from 200kHz to 2.2MHz, allowing precise timing alignment with other system clocks to reduce beat frequencies and EMI peaks. The internal oscillator locks to the external edge within 2ms of stable output, and pulse width must remain under 1.7μs for reliable synchronization.
How does the power-good (PG) pin behave during startup and fault conditions?
The open-drain PG pin pulls low until VOUT reaches 90% of the target (e.g., 3.3V → 2.97V), then asserts high after a 90μs delay. It pulls low again if VOUT drops to 84% of target, or immediately upon EN deactivation, thermal shutdown, or output short-circuit - providing deterministic sequencing and fault signaling without external comparators.
What is the purpose of the BST pin, and why is a 20Ω resistor recommended?
The BST pin supplies the floating gate drive voltage for the high-side MOSFET via a capacitor connected between BST and SW. A 20Ω resistor in series with the BST capacitor damps high-frequency ringing at the SW node during switching transitions - reducing EMI and preventing false triggering of the internal bootstrap UVLO (2.2V threshold).
Does MPQ4420HGJ-Z require external compensation components for loop stability?
No - the MPQ4420HGJ-Z features an internally compensated current-mode controller optimized for standard output capacitor types (ceramic, tantalum, electrolytic). Stability is maintained across 10μF–470μF output capacitance and 5mΩ–100mΩ ESR, eliminating the need for external Type-II or Type-III compensation networks in most applications.
What thermal derating applies to the TSOT23-8 package at elevated ambient temperatures?
With θJA = 100°C/W on a 4-layer PCB, the MPQ4420HGJ-Z delivers full 2A output up to +85°C ambient. Above that, output current must be linearly reduced: at +105°C ambient, max continuous current is ~1.5A; at +125°C, it drops to ~1.0A - based on TJ ≤ 125°C operating limit and thermal shutdown at 170°C.
Is the MPQ4420HGJ-Z RoHS-compliant and lead-free?
Yes - MPQ4420HGJ-Z is fully RoHS-compliant and lead-free, with green status verified per MPS Quality Assurance documentation. The TSOT23-8 package uses matte tin (Sn) lead finish, compatible with standard Pb-free reflow profiles (JEDEC J-STD-020D), and meets IPC/JEDEC standard for moisture sensitivity level (MSL) 1.
MPQ4420HGJ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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):
- 4V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 32.4V
- Current - Output:
- 2A
- Frequency - Switching:
- 410kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MPQ4420HGJ-Z FAQ
1.How can I place an order for MPQ4420HGJ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4420HGJ-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 MPQ4420HGJ-Z reliable?
The price and inventory of MPQ4420HGJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4420HGJ-Z is usually 5 days.
3.What payment methods are accepted for MPQ4420HGJ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4420HGJ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4420HGJ-Z?
MPQ4420HGJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4420HGJ-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 MPQ4420HGJ-Z?
For technical support, including MPQ4420HGJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4420HGJ-Z requirements.
6.How does Aetrix verify that MPQ4420HGJ-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4420HGJ-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 MPQ4420HGJ-Z meets industry standards.
7.What is the process for return or replacement of MPQ4420HGJ-Z?
All MPQ4420HGJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4420HGJ-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 MPQ4420HGJ-Z part is unused and in its original packaging.
Return procedure for MPQ4420HGJ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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