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Monolithic Power Systems Inc. MP4415AGQB-P
- Part No.:
- MP4415AGQB-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 13-PowerVQFN
- Datasheet:
-
MP4415AGQB-P.pdf
- Description:
- IC REG BUCK ADJ 1.5A 13QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,384
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Product details
Overview
MP4415AGQB-P 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, internal soft-start, and valley-current OCP - deployed in automotive infotainment power rails.
For engineers reviewing the MP4415AGQB-P datasheet, MP4415AGQB-P pinout, MP4415AGQB-P application, or MP4415AGQB-P equivalent, key selection criteria include input voltage range compliance, thermal shutdown threshold (170°C), PG accuracy (±5% hysteresis), RDS(ON) matching for efficiency at light load, and QFN-13 package thermal resistance (θJA = 60°C/W).
Technical Context
The MP4415AGQB-P uses peak-current-mode control with fixed-frequency PWM, enabling fast transient response and simplified loop compensation via an internal 0.807V reference and optimized compensation network. Its forced CCM operation ensures stable 2.2MHz switching from no-load to full-load, minimizing output ripple and eliminating audible noise.
It integrates a bootstrap regulator with 2.2V UVLO and 150mV hysteresis for high-side gate drive, supports external clock synchronization from 450kHz to 2.2MHz, and implements frequency foldback during short-circuit or soft-start to limit peak inductor current and prevent thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports wide automotive battery transients (e.g., cold-crank to load-dump) without external pre-regulation. |
| Output Current | 1.5A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in compact embedded systems. |
| Switching Frequency | Default 2.2MHz, syncable 450kHz–2.2MHz - enables use of small 2.2µH inductors and reduces EMI filter size. |
| Feedback Voltage | 0.807V ±12mV - sets output voltage via resistor divider; tight tolerance minimizes output error across temperature. |
| HS/LS RDS(ON) | 90mΩ / 50mΩ - achieves >92% efficiency at 12VIN/3.3VOUT/1A, reducing conduction loss and thermal stress. |
| Thermal Shutdown | 170°C with 30°C hysteresis - protects against sustained overload while allowing recovery without manual reset. |
| Power Good Accuracy | ±5% hysteresis around 88% VFB - provides reliable system power sequencing and fault detection. |
Pinout & Package
MP4415AGQB-P is housed in a thermally enhanced QFN-13 (2.5mm × 3mm) package with exposed thermal pad, supporting 2.08W continuous power dissipation at TA = 25°C and θJA = 60°C/W on a 4-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 IN | Input power supply rail | Accepts 4–36V; 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 unrouted to avoid parasitic coupling. |
| 4 PG | Open-drain power-good indicator | Pulls low during startup, thermal shutdown, or EN deactivation; rises after VOUT reaches 88% of target with 90μs delay. |
| 5 EN/SYNC | Enable and external clock input | Logic-high (>1.45V) enables regulation; accepts 450kHz–2.2MHz sync signal to align switching edges and reduce EMI. |
| 6 FB | Feedback node for output voltage sensing | Compares divided VOUT to 0.807V reference; sensitive analog node requiring shortest possible trace and no vias. |
| 7 VCC | Internal bias regulator output | Supplies 4.9V ±4% to internal circuitry; requires 0.1–0.22μF ceramic capacitor directly between VCC and AGND. |
| 8 AGND | Analog ground reference | Reference for FB, EN/SYNC, and error amplifier; internally tied to PGND but kept separate in layout to minimize noise coupling. |
| 9 SW | Switch node | Connects to inductor; carries high dv/dt square wave; must use wide copper pour and minimal trace length to reduce EMI and losses. |
| 10 BST | Bootstrap supply for high-side driver | Requires 0.1–1μF capacitor between BST and SW; 20Ω series resistor strongly recommended to damp ringing. |
| 11–13 PGND | Power ground return path | High-current return for HS/LS FETs and inductor; must connect to large copper pour with multiple thermal vias to exposed pad. |
Key Features
| Feature | Design Value |
|---|---|
| Forced Continuous Conduction Mode (CCM) | Maintains fixed 2.2MHz switching across entire 0–1.5A load range, eliminating frequency modulation artifacts and simplifying EMI filtering. |
| Valley-Current OCP with Hiccup Mode | Detects low-side current minima to prevent inductor saturation during overload; enters periodic restart (hiccup) under dead-short to limit average power dissipation. |
| CISPR25 Class 5 Compliance | Meets stringent automotive EMI limits for conducted and radiated emissions without additional shielding or complex filters. |
| Internal Soft-Start (1.5ms) | Linearly ramps reference voltage to prevent output overshoot and inrush current into downstream capacitors during power-up. |
| Integrated Bootstrap Regulator | Autonomously charges BST capacitor using internal PMOS pass device and regulates BST-SW voltage to ~5V, eliminating need for external diode in most applications. |
Applications
| Automotive Infotainment | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering SoC cores and DDR memory in head-unit mainboards subject to 4–36V battery variations and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 1.1V/1.8V/3.3V rails with fast line/load transient response and PG signaling for safe boot sequencing. Use Value: 2.2MHz operation avoids AM radio band; QFN-13 footprint saves board space; 170°C thermal shutdown prevents field failures during prolonged high-ambient operation. | Use Scenario: Generating isolated 5V and 3.3V supplies for digital I/O expansion cards in factory automation controllers. IC Role / Device Role / Timing Role: Non-isolated point-of-load converter accepting 24V DC industrial bus and regulating to logic-level voltages with precise PG assertion. Use Value: Wide 4–36V input accommodates brownout conditions; valley-current OCP prevents latch-up during sensor short circuits; CISPR25 compliance eases CE marking. |
| Medical Imaging Sensor Interface | Telecom Remote Radio Unit |
Use Scenario: Supplying low-noise 3.3V for CMOS image sensor interfaces in portable ultrasound devices where EMI must not interfere with analog front-end signals. IC Role / Device Role / Timing Role: High-frequency synchronous buck providing clean, ripple-controlled power with minimal conducted noise into adjacent analog signal paths. Use Value: 2.2MHz switching pushes fundamental noise beyond sensitive baseband frequencies; internal compensation eliminates external type-II/III networks. | Use Scenario: Powering FPGA configuration and transceiver bias in outdoor 5G small-cell radios exposed to -40°C to +85°C ambient and high humidity. IC Role / Device Role / Timing Role: Robust buck converter delivering 1.2V core and 1.8V I/O rails with guaranteed operation across full industrial temperature range and thermal shutdown recovery. Use Value: 125°C max junction rating and 30°C thermal hysteresis ensure reliable restart after temporary overloads; QFN-13 package supports automated optical inspection. |
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-P | Automotive-grade variant with AEC-Q100 qualification, same electrical specs and pinout. | Required for safety-critical automotive modules; includes extended temperature validation (-40°C to +125°C). | Select when automotive qualification, enhanced reliability testing, or longer product lifecycle commitment is mandatory. |
| TPS543320RTWR | 3A output, 2.2MHz, but uses external MOSFETs and requires more external components; higher BOM cost. | Suitable for higher-current loads where scalability matters; lacks integrated PG and soft-start timing control. | Choose only if >1.5A output or design flexibility with discrete FETs outweighs integration benefits and board area savings. |
Compared with MP4415AGQB-P, MPQ4415AGQB-P adds automotive qualification without altering performance, while TPS543320RTWR trades integration for higher current capability and design adaptability - making MP4415AGQB-P optimal for space-constrained, cost-sensitive 1.5A applications needing plug-and-play operation.
Availability
MP4415AGQB-P is available at Aetrix Electronics and suitable for automotive infotainment systems, 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-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 power management ICs, with over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP4415A product line delivers compact, high-frequency synchronous buck converters targeting space-constrained applications in automotive, industrial, and telecom sectors where input voltage range, thermal robustness, and EMI compliance are critical.
FAQ
What is the minimum recommended input capacitance for MP4415AGQB-P?
A 4.7µF X5R/X7R ceramic capacitor plus a 0.1µF 0603 bypass capacitor placed directly at the IN and PGND pins is required. The 0.1µF cap absorbs high-frequency switching noise, while the bulk capacitor handles RMS input ripple current - calculated as up to 0.5×ILOAD at worst-case VIN = 2×VOUT.
Can MP4415AGQB-P operate with an input voltage below 4V?
No. The absolute minimum operating input voltage is 4V per datasheet specifications. Below this, the internal VCC regulator cannot sustain bias for control circuitry, and UVLO prevents startup. The 3.5V rising UVLO threshold ensures reliable turn-on only within the validated 4–36V range.
How does the frequency foldback feature behave under overload?
During short-circuit or severe overload, the MP4415AGQB-P reduces switching frequency to ~1.1MHz (half nominal) when FB falls below 400mV. This lowers peak inductor current and average power dissipation, preventing thermal runaway while maintaining hiccup-mode restart capability until fault clearance.
Is an external bootstrap diode necessary for MP4415AGQB-P?
No - the IC integrates a bootstrap regulator that autonomously charges the BST capacitor. An external diode (e.g., 1N4148) is optional and only beneficial at very high duty cycles (>65%) to improve efficiency by reducing BST charging losses; it is not required for standard operation.
What is the maximum allowable output voltage adjustment range?
The output voltage is adjustable from 0.8V up to VIN × DMAX (85%), limited by minimum on-time (46ns) and practical inductor selection. For example, at 12VIN, maximum VOUT is ~10.2V; lower outputs require precision resistor dividers with RFB1 ≈ 40kΩ to maintain loop stability and feedback accuracy.
Does MP4415AGQB-P support spread-spectrum frequency modulation?
No. The MP4415AGQB-P does not implement spread-spectrum modulation. It offers fixed-frequency operation or external synchronization (450kHz–2.2MHz), but no intentional frequency dithering. EMI reduction relies on high-frequency operation, integrated MOSFETs, and CISPR25-compliant layout practices.
How is thermal performance affected by PCB layout?
Thermal resistance drops from θJA = 60°C/W (4-layer board) to >100°C/W on 2-layer boards lacking thermal vias to the exposed pad. Using ≥6 thermal vias under the QFN-13's exposed pad and connecting them to an inner-layer ground plane reduces junction-to-ambient rise by up to 35°C at 1.5A load.
MP4415AGQB-P 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-P FAQ
1.How can I place an order for MP4415AGQB-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4415AGQB-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 MP4415AGQB-P reliable?
The price and inventory of MP4415AGQB-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4415AGQB-P is usually 5 days.
3.What payment methods are accepted for MP4415AGQB-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4415AGQB-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4415AGQB-P?
MP4415AGQB-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4415AGQB-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 MP4415AGQB-P?
For technical support, including MP4415AGQB-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4415AGQB-P requirements.
6.How does Aetrix verify that MP4415AGQB-P is sourced from the original manufacturer or authorized distributors?
All MP4415AGQB-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 MP4415AGQB-P meets industry standards.
7.What is the process for return or replacement of MP4415AGQB-P?
All MP4415AGQB-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4415AGQB-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 MP4415AGQB-P part is unused and in its original packaging.
Return procedure for MP4415AGQB-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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