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Monolithic Power Systems Inc. MP4415AGQB-Z
- Part No.:
- MP4415AGQB-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 13-PowerVQFN
- Datasheet:
-
MP4415AGQB-Z.pdf
- Description:
- IC REG BUCK ADJ 1.5A 13QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,950
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Product details
Overview
MP4415AGQB-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 90mΩ/50mΩ MOSFETs, delivering 1.5A continuous output current across a 4V–36V input range, operating at a default 2.2MHz switching frequency, and featuring power-good indication, valley-current OCP, and thermal shutdown-used in automotive infotainment power rails.
For engineers reviewing the MP4415AGQB-Z datasheet, MP4415AGQB-Z pinout, MP4415AGQB-Z application, or MP4415AGQB-Z equivalent, key selection considerations include its QFN-13 (2.5mm×3mm) package, 0.8V adjustable output, CISPR25 Class 5 compliance, forced CCM operation, and EN/SYNC pin for enable control or external clock synchronization.
Technical Context
The MP4415AGQB-Z employs peak-current-mode control with internal compensation, enabling stable regulation across wide load and line variations without external loop components. Its fixed-frequency architecture supports forced continuous conduction mode (CCM) from no-load to full-load, minimizing output ripple and simplifying EMI filtering.
It integrates dual MOSFET drivers with bootstrap charging circuitry, including a dedicated floating regulator and UVLO protection on the BST rail. Frequency foldback activates at VIN >21V or during short-circuit conditions, reducing switching frequency to 1.1MHz to limit peak current and improve fault resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports wide industrial and automotive battery-supplied systems including 12V/24V rails and cold-crank transients. |
| Output Current | 1.5A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in compact embedded designs. |
| Switching Frequency | Default 2.2MHz, syncable 450kHz–2.2MHz - enables use of small external inductors (e.g., 2.2µH) and reduces audible noise. |
| Feedback Reference | 0.807V ±1.5% - sets output voltage via resistor divider; enables precise 3.3V/5V generation with <1% error over temperature. |
| Internal MOSFET RDS(on) | HS: 90mΩ, LS: 50mΩ - minimizes conduction loss and improves full-load efficiency (>92% typical at 12V→3.3V/1A). |
| Protection Features | OCP (valley-current detection + hiccup), thermal shutdown (170°C), UVLO (3.5V rising), PG indicator - ensures robust operation under overload, short-circuit, and thermal stress. |
| Package | QFN-13 (2.5mm × 3mm, 0.5mm pitch) - thermally enhanced footprint with exposed PGND pad for efficient heat dissipation in space-constrained PCBs. |
Pinout & Package
MP4415AGQB-Z is housed in a thermally optimized QFN-13 (2.5mm × 3mm) package with an exposed PGND thermal pad. The package supports reflow soldering per JEDEC J-STD-020 and achieves θJA = 60°C/W on a 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 IN | Main power input | Accepts 4V–36V; requires low-ESR ceramic decoupling placed adjacent to pins to suppress high di/dt noise. |
| 3 NC | No connection | Unbonded die pad; must remain unconnected and unstubbed on PCB to avoid parasitic coupling. |
| 4 PG | Open-drain power-good flag | Pulls low during startup, thermal shutdown, or EN disable; rises after VOUT reaches 88% of target with 90μs delay. |
| 5 EN/SYNC | Enable & external clock input | Logic-high (>1.45V) enables operation; accepts 450kHz–2.2MHz sync signal; includes internal 400kΩ pull-down. |
| 6 FB | Voltage feedback node | Connects to resistor divider tap; senses output voltage against 0.807V reference; sensitive to layout-induced noise. |
| 7 VCC | Internal bias supply | Regulated ~4.9V output; requires 0.1–0.22μF ceramic capacitor directly between VCC and AGND. |
| 8 AGND | Analog ground reference | Reference for FB, EN/SYNC, and internal logic; internally tied to PGND but kept separate on PCB for noise isolation. |
| 9 SW | Switch node | Drives external inductor; exhibits fast-edge ringing; routed with minimum loop area and away from analog traces. |
| 10 BST | Bootstrap supply | Requires 0.1–1μF capacitor to SW; 20Ω series resistor recommended to damp SW edge spikes and reduce EMI. |
| 11,12,13 PGND | Power ground return | High-current return path for HS/LS FETs and input/output capacitors; connected to thermal pad for optimal heat transfer. |
Key Features
| Feature | Design Value |
|---|---|
| Forced Continuous Conduction Mode (CCM) | Maintains fixed 2.2MHz operation down to zero load-reducing light-load output ripple and eliminating frequency modulation artifacts. |
| Integrated Power MOSFETs | 90mΩ HS / 50mΩ LS RDS(on) - eliminates external switch selection, reduces BOM count, and improves thermal coupling between driver and FETs. |
| Valley-Current OCP with Hiccup Recovery | Detects inductor current minima during LS-FET conduction; triggers hiccup mode on sustained overload-limiting average power dissipation during output shorts. |
| CISPR25 Class 5 Compliance | Meets stringent automotive EMI limits without requiring external snubbers or shielding-validated with standard test board per ISO 7637-2 and CISPR 25 Ed.4. |
| Internal Soft Start | 1.5ms ramp time - prevents output overshoot and inrush current during power-up; eliminates need for external SS capacitor. |
Applications
| Automotive Infotainment | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering display controllers and audio codecs in head units with 12V battery input subject to load dump and cold-crank. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck regulator supplying SoC peripherals and communication interfaces (I²C, SPI, CAN transceivers). Use Value: Wide 4V–36V input range handles automotive transients; 2.2MHz operation allows compact 2.2µH inductor; PG signal enables system-level power sequencing. | Use Scenario: Generating isolated 5V rail for digital I/O expansion cards in programmable logic controllers with 24V DC field supply. IC Role / Device Role / Timing Role: Point-of-load (POL) converter regulating FPGA I/O banks and level-shifting buffers in modular backplane architectures. Use Value: QFN-13 package fits dense PCB layouts; CCM mode ensures predictable EMI profile; thermal shutdown protects against ambient overheating in enclosed cabinets. |
| Medical Imaging Sensor Interface | Telecom Remote Radio Unit |
Use Scenario: Supplying low-noise 1.8V/3.3V to CMOS image sensor arrays and ADC front-ends in portable ultrasound probes. IC Role / Device Role / Timing Role: High-efficiency, low-ripple POL regulator feeding analog signal chain components requiring stable, clean DC bias. Use Value: Internal compensation and low-RDS(on) MOSFETs minimize output voltage deviation under dynamic load steps; FB accuracy ±1.5% ensures consistent sensor gain calibration. | Use Scenario: Providing 5V/12V bias to GaN power amplifiers and fronthaul PHY ICs in outdoor 5G small-cell base stations. IC Role / Device Role / Timing Role: Secondary buck stage converting 48V intermediate bus to amplifier supply rails with tight transient response. Use Value: 2.2MHz sync capability aligns switching edges with system clock to avoid beat frequencies; valley-current OCP prevents latch-up during PA burst transmission. |
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 |
|---|---|---|---|
| MPQ4415AGQB-Z | Automotive-grade variant (AEC-Q100 qualified); identical electrical specs and pinout; extended temp range (−40°C to +125°C). | Required for automotive safety-critical modules where qualification traceability and HTOL testing are mandated. | Select MPQ4415AGQB-Z when AEC-Q100 Grade 1 compliance and PPAP documentation are required. |
| TPS543320RTWR | 36V, 3A, 2.2MHz buck with PMBus interface; higher current rating but larger 3mm×3mm QFN-16 package and external compensation. | Suitable for systems needing telemetry, margining, or dynamic voltage scaling via digital control. | Choose TPS543320RTWR only if digital configurability and >1.5A output are essential; adds complexity and cost. |
Compared with MP4415AGQB-Z, MPQ4415AGQB-Z offers identical performance with automotive qualification, while TPS543320RTWR trades simplicity and footprint for digital control and higher current-making MP4415AGQB-Z optimal for cost-sensitive, space-constrained analog-regulated systems.
Availability
MP4415AGQB-Z is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and medical imaging sensor interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP4415AGQB-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 power management ICs, with design centers in the US, China, and Taiwan, and global distribution through authorized partners.
The MP4415A belongs to MPS's high-voltage synchronous buck converter product line, engineered for compact, high-efficiency DC/DC conversion in automotive, industrial, and telecom applications where wide input range and minimal external components are critical.
FAQ
What is the maximum allowable input voltage for MP4415AGQB-Z?
The absolute maximum input voltage is +40V, but the recommended operating range is 4V to 36V. Exceeding 36V risks violating the 2.2MHz oscillator stability margin and may trigger premature frequency foldback or thermal derating. Operation above 36V is not guaranteed per datasheet specifications and voids reliability assurances.
Can MP4415AGQB-Z operate without an external bootstrap diode?
Yes-MP4415AGQB-Z uses internal bootstrap charging and does not require an external diode. The integrated floating regulator and PMOS pass transistor fully support duty cycles up to 95%. An external diode (e.g., 1N4148) is optional and only beneficial for >65% duty cycle applications to marginally improve efficiency by reducing BST charge path losses.
How is output voltage adjusted on MP4415AGQB-Z?
Output voltage is set using a resistor divider from VOUT to AGND, connected to the FB pin. With a 0.807V internal reference, RFB2 = RFB1 × (0.807V / (VOUT − 0.807V)). For VOUT ≥ 1V, RFB1 ≈ 40kΩ is recommended; for lower outputs, a T-network with RT improves accuracy and loop stability.
Does MP4415AGQB-Z support spread-spectrum frequency modulation?
No-MP4415AGQB-Z does not implement spread-spectrum modulation. It operates at a fixed nominal frequency of 2.2MHz, with optional external synchronization from 450kHz to 2.2MHz. EMI reduction relies on high-frequency operation, integrated MOSFETs, and CISPR25 Class 5–compliant layout practices-not frequency dithering.
What is the purpose of the NC pin (Pin 3) on MP4415AGQB-Z?
Pin 3 is a no-connect (NC) terminal-unbonded on-die with no internal connection. It must remain unconnected on the PCB; routing traces or copper pours to this pin introduces parasitic capacitance that can couple noise into adjacent AGND or FB nodes, degrading regulation accuracy and transient response.
How does the power-good (PG) signal behave during thermal shutdown?
During thermal shutdown, the PG pin is actively pulled low within microseconds of junction temperature exceeding 170°C. This provides immediate system-level fault indication-distinct from normal startup behavior where PG remains low until VFB exceeds 88% of the reference and sustains for ≥90μs after soft-start completion.
Is MP4415AGQB-Z compatible with ceramic output capacitors only?
No-it supports ceramic, tantalum, and low-ESR electrolytic output capacitors. Ceramic is preferred for low ESR and high-frequency ripple suppression; tantalum/electrolytic types are acceptable when bulk capacitance is prioritized, though their higher ESR increases output ripple magnitude per ΔVOUT ≈ ILOAD × RESR.
MP4415AGQB-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 13-PowerVQFN
- 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):
- 30.6V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 450kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 13-QFN (2.5x3)
MP4415AGQB-Z FAQ
1.How can I place an order for MP4415AGQB-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4415AGQB-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 MP4415AGQB-Z reliable?
The price and inventory of MP4415AGQB-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4415AGQB-Z is usually 5 days.
3.What payment methods are accepted for MP4415AGQB-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4415AGQB-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4415AGQB-Z?
MP4415AGQB-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4415AGQB-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 MP4415AGQB-Z?
For technical support, including MP4415AGQB-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4415AGQB-Z requirements.
6.How does Aetrix verify that MP4415AGQB-Z is sourced from the original manufacturer or authorized distributors?
All MP4415AGQB-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 MP4415AGQB-Z meets industry standards.
7.What is the process for return or replacement of MP4415AGQB-Z?
All MP4415AGQB-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4415AGQB-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 MP4415AGQB-Z part is unused and in its original packaging.
Return procedure for MP4415AGQB-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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