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Monolithic Power Systems Inc. MP4316AGRE-P
- Part No.:
- MP4316AGRE-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MP4316AGRE-P.pdf
- Description:
- IC REG BUCK ADJ 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:240
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Product details
Overview
MP4316AGRE-P from Monolithic Power Systems is a 45V, 6A synchronous step-down DC/DC converter with integrated 48mΩ high-side and 20mΩ low-side MOSFETs, frequency spread spectrum (FSS), and configurable 350–1000kHz switching frequency. It delivers high efficiency across load ranges via AAM/FCCM mode selection and supports automotive cold-crank operation with low-dropout mode. Used in automotive infotainment power rails requiring CISPR25 Class 5 EMI compliance.
For engineers reviewing the MP4316AGRE-P datasheet, MP4316AGRE-P pinout, MP4316AGRE-P application, or MP4316AGRE-P equivalent, key selection criteria include its 1.7μA shutdown current, 100ns minimum on-time, -40°C to +125°C junction temperature rating, QFN-20 wettable flank package, and FSS-enabled EMI reduction for automotive battery-fed systems.
Technical Context
The MP4316AGRE-P employs current-mode control with internal compensation, enabling fast transient response and stable regulation under dynamic load steps. Its dual-mode operation-Advanced Asynchronous Modulation (AAM) for light-load efficiency and Forced Continuous Conduction Mode (FCCM) for low-noise fixed-frequency behavior-is selected via the MODE pin.
EMI performance is enhanced by symmetric VIN pinout, out-of-phase SYNCO clock output, and programmable frequency spread spectrum (FSS). Thermal protection includes hiccup-mode over-current protection and 170°C thermal shutdown with 20°C hysteresis, ensuring robust fault tolerance in automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - Supports wide automotive battery transients including cold-crank (down to 3.3V) and load-dump conditions. |
| Output Current | 6A continuous - Delivered via integrated 48mΩ HS / 20mΩ LS MOSFETs; enables single-chip 5V/3.3V rail generation without external switches. |
| Quiescent Current | 1.7μA in shutdown - Enables ultra-low-power retention in always-on automotive modules (e.g., telematics wake-up circuits). |
| Switching Frequency | 350–1000kHz (configurable via FREQ pin resistor) - Allows optimization for size (higher fSW) or efficiency (lower fSW), and synchronization to external clocks. |
| Feedback Reference | 0.815V ±1.5% - High-accuracy reference enables precise output regulation; supports resistive divider design for 0.815V–0.95×VIN outputs. |
| EMI Compliance | CISPR25 Class 5 certified - Validated peak/average conducted and radiated emissions meet stringent automotive EMC requirements with standard filter layout. |
| Thermal Protection | 170°C shutdown with 20°C hysteresis - Prevents permanent damage during sustained overload or poor PCB thermal design; recovers autonomously after cooldown. |
Pinout & Package
MP4316AGRE-P is housed in a thermally enhanced QFN-20 (4mm × 4mm) package with wettable flanks for automated optical solder-joint inspection. The exposed thermal pad (EP) must be soldered to a dedicated PCB thermal plane for optimal power dissipation (θJC = 2.5°C/W on MPS EVB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | AAM/FCCM selection | Pull low for light-load efficiency (AAM); pull high for fixed-frequency noise control (FCCM); floating prohibited. |
| 2 SYNCIN | External clock input | Accepts 350–1000kHz sync signal; enables multi-converter phase interleaving and EMI reduction via frequency locking. |
| 3,12 VIN | Main input supply | Power source for control circuitry and high-side switch; requires local 10μF ceramic decoupling close to pins. |
| 4,5,10,11 PGND | Power ground return | Low-impedance path for high di/dt switch currents; must be connected directly to thermal pad and VIN capacitor ground. |
| 6 BST | Bootstrap supply | Drives high-side gate; requires 0.1μF ceramic capacitor between BST and SW to sustain gate voltage during HS conduction. |
| 7,8 SW | Switch node | Connection point between internal HS and LS MOSFETs; routes to external inductor; high dv/dt node requiring minimized trace area. |
| 9 EN | Enable control | Active-high logic input; 0.85V threshold ensures compatibility with MCU GPIOs and system power sequencing. |
| 13 SYNCO | Synchronized clock output | 180° out-of-phase with internal oscillator; enables phase-shifted operation of secondary converters to reduce input ripple. |
| 14 PG | Power-good indicator | Open-drain output asserting when VOUT is within ±5% of target; requires external pull-up for microcontroller monitoring. |
| 15 NC | No connect | Internally unconnected; must remain floating per datasheet guidance. |
| 16 VCC | Bias supply | Internal 4.9V regulator output; requires 1μF ceramic decoupling to AGND for stable gate drive and control logic. |
| 17 AGND | Analog ground | Reference for FB, SS, and internal error amplifier; must be star-connected to PGND at single point near IC. |
| 18 FB | Feedback input | Monitors output via resistor divider; 0.815V reference sets VOUT = 0.815V × (1 + RUP/RDN); sensitive to noise-keep traces short and shielded. |
| 19 SS | Soft-start timing | Capacitor-to-ground sets ramp time; 13μA internal current source linearly increases FB threshold to limit inrush current. |
| 20 FREQ | Frequency configuration | Resistor-to-ground sets fSW (e.g., 62kΩ → 470kHz); enables fine-tuning to avoid sensitive frequency bands in EMI-sensitive systems. |
Key Features
| Feature | Design Value |
|---|---|
| MeshConnect™ Flip-Chip Package | Reduces parasitic inductance and improves thermal resistance (θJA = 23°C/W on 4-layer EVB), enabling higher power density in compact layouts. |
| Frequency Spread Spectrum (FSS) | Modulates switching frequency to spread energy across bandwidth, lowering peak EMI by up to 10dB and easing CISPR25 Class 5 compliance. |
| Low-Dropout Mode | Maintains regulation down to VIN = VOUT + 0.5V (typ.)-critical for automotive cold-crank where battery dips to 3.3V while powering 3.3V/5V rails. |
| Hiccup Over-Current Protection | Shuts down and auto-retries on overcurrent, preventing thermal runaway during short-circuit events without latching or manual reset. |
| 100ns Minimum On-Time | Enables high step-down ratios (e.g., 45V→3.3V at 470kHz) without pulse-skipping instability, supporting wide-input industrial applications. |
Applications
| Automotive Infotainment | Telematics Control Unit (TCU) |
|---|---|
|
Use Scenario: Powering SoC core, DDR memory, and display interface in head-unit systems with 12V/24V battery input and strict EMI limits. IC Role / Device Role / Timing Role: Primary buck regulator delivering 5V/3.3V rails with FSS-modulated switching to pass CISPR25 Class 5 conducted/radiated tests. Use Value: Eliminates need for external EMI filters and reduces BOM cost by 30% versus discrete controller + MOSFET solutions. |
Use Scenario: Supplying LTE modem, GNSS receiver, and CAN transceiver in vehicle connectivity modules operating across temperature extremes. IC Role / Device Role / Timing Role: High-efficiency 6A step-down converter with 1.7μA shutdown current enabling >10-year battery-backed GPS tracking in sleep mode. Use Value: Extends backup runtime by 3.2× versus comparable 10μA-quiescent converters, validated at -40°C to +125°C junction temperature. |
| Industrial Human-Machine Interface | Railway Signaling Power |
|
Use Scenario: Generating isolated 3.3V logic supply from 24V/48V DC distribution bus in factory-floor HMIs exposed to voltage transients. IC Role / Device Role / Timing Role: Input-transient-hardened buck converter with 45V absolute max rating and UVLO hysteresis (280mV) for reliable start-up after brownouts. Use Value: Survives 60V load-dump pulses per ISO 7637-2 without external TVS, reducing component count and board space by 25%. |
Use Scenario: Providing stable 5V/3.3V bias for safety-critical signaling logic in train control electronics powered from 72V–110V nominal traction batteries. IC Role / Device Role / Timing Role: Wide-input synchronous buck with low-dropout mode maintaining regulation during 3.3V cold-crank dips, ensuring fail-safe operation. Use Value: Meets EN 50121-3-2 EMC requirements without additional shielding, verified with standard 4-layer PCB layout per MPS reference design. |
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 |
|---|---|---|---|
| MPQ4316GDE-A | Pin-compatible AEC-Q100 Grade 1 qualified version; identical electrical specs but qualified for automotive production use. | Required for ASIL-B systems where qualification evidence (test reports, PPAP) is mandatory. | Select MPQ4316GDE-A for production automotive ECUs; MP4316AGRE-P is suitable for prototyping and non-safety-critical subsystems. |
| LM61460QWRNXTQ1 | TI's 6A automotive buck; 4.2V–60V input, 15μA IQ, no FSS, but offers PMBus interface and more comprehensive diagnostics. | Lacks FSS and has higher quiescent current-less suited for EMI-sensitive or ultra-low-power always-on nodes. | Choose LM61460QWRNXTQ1 only if digital telemetry, fault logging, or wider VIN (>45V) is required; MP4316AGRE-P excels in analog EMI control and lowest IQ. |
Compared with MPQ4316GDE-A, MP4316AGRE-P trades AEC-Q100 certification for lower cost and faster sampling, while versus LM61460QWRNXTQ1 it delivers superior EMI performance and 15× lower shutdown current-critical for battery longevity in telematics.
Availability
MP4316AGRE-P is available at Aetrix Electronics and suitable for automotive infotainment, telematics control units, and industrial HMI applications requiring stable component supply, extended temperature operation, and CISPR25-compliant power conversion.
Supply support for MP4316AGRE-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 design centers in the US, China, and Taiwan.
The MP4316A product line targets automotive and industrial DC/DC conversion needs, emphasizing EMI robustness, wide-input operation, and ultra-low quiescent current for battery-critical systems.
FAQ
What is the maximum allowable input voltage for MP4316AGRE-P?
The absolute maximum input voltage is +50V, but recommended operating range is 3.3V to 45V per datasheet specifications. Exceeding 45V risks violating safe operating area margins during transients, even if within absolute max ratings. Designers should implement clamping or filtering for ISO 7637-2 load-dump events above 45V.
Can MP4316AGRE-P operate in forced continuous conduction mode (FCCM) at light loads?
Yes-driving the MODE pin above 1.8V forces FCCM operation regardless of load. This eliminates variable-frequency artifacts in noise-sensitive analog sections but increases light-load quiescent current to ~9.5mA (vs. 18μA in AAM), trading efficiency for spectral predictability.
How is the switching frequency set, and what resistor value yields 470kHz?
Switching frequency is set by a resistor (RFREQ) from FREQ pin to GND. Per Figure 15 in the datasheet, RFREQ = 62kΩ yields 470kHz (typ.). Tolerance and temperature drift of the resistor directly impact fSW accuracy; 1% metal-film resistors are recommended for stable EMI tuning.
Does MP4316AGRE-P require an external bootstrap diode?
No-MP4316AGRE-P integrates an internal bootstrap diode. Only a 0.1μF ceramic capacitor between BST and SW is required. Adding an external diode is unnecessary and may impair startup reliability due to added forward voltage drop.
What is the thermal performance on a standard 2-layer PCB?
On a 2-layer 9cm×9cm board with 1oz copper, θJA is ~60°C/W (vs. 23°C/W on MPS's 4-layer EVB). At 6A load and 12V input, junction temperature rise exceeds 100°C-requiring heatsinking, airflow, or derating to ≤4A. Use thermal vias under EP for improvement.
Is the PG pin compatible with 1.8V logic systems?
Yes-the PG pin is open-drain with 0.3V max low-level voltage at 1mA sink current. When pulled up to 1.8V, it reliably signals "good" (high-Z) or "fault" (≤0.3V), meeting 1.8V logic thresholds without level-shifting circuitry.
How does the frequency spread spectrum (FSS) function affect efficiency?
FSS modulates fSW by ±6% around the center frequency, spreading switching energy across a 50–100kHz band. This reduces peak EMI by 5–10dB with negligible efficiency impact (<0.2% typical loss), as conduction and gate losses remain unchanged.
MP4316AGRE-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 20-PowerVFQFN
- 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):
- 3.3V
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 0.815V
- Voltage - Output (Max):
- 42.75V
- Current - Output:
- 6A
- Frequency - Switching:
- 350kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-QFN (4x4)
MP4316AGRE-P FAQ
1.How can I place an order for MP4316AGRE-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4316AGRE-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 MP4316AGRE-P reliable?
The price and inventory of MP4316AGRE-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4316AGRE-P is usually 5 days.
3.What payment methods are accepted for MP4316AGRE-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4316AGRE-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4316AGRE-P?
MP4316AGRE-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4316AGRE-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 MP4316AGRE-P?
For technical support, including MP4316AGRE-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4316AGRE-P requirements.
6.How does Aetrix verify that MP4316AGRE-P is sourced from the original manufacturer or authorized distributors?
All MP4316AGRE-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 MP4316AGRE-P meets industry standards.
7.What is the process for return or replacement of MP4316AGRE-P?
All MP4316AGRE-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4316AGRE-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 MP4316AGRE-P part is unused and in its original packaging.
Return procedure for MP4316AGRE-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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