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Monolithic Power Systems Inc. MP4316AGRE-Z
- Part No.:
- MP4316AGRE-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MP4316AGRE-Z.pdf
- Description:
- IC REG BUCK ADJ 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,990
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Product details
Overview
MP4316AGRE-Z from Monolithic Power Systems is a 45V, 6A synchronous step-down DC/DC converter with integrated high-side (48mΩ) and low-side (20mΩ) MOSFETs, frequency spread spectrum (FSS), and 1.7μA shutdown current. It operates across 3.3V–45V input range, supports automotive cold-crank via low-dropout mode, and delivers regulated output down to 0.815V in battery-powered radios and industrial power systems.
For engineers reviewing the MP4316AGRE-Z datasheet, MP4316AGRE-Z pinout, MP4316AGRE-Z application, or MP4316AGRE-Z equivalent, key selection criteria include its 350–1000kHz configurable switching frequency, AAM/FCCM mode selection, CISPR25 Class 5 EMI compliance, and QFN-20 wettable flank package for automated optical inspection.
Technical Context
The MP4316AGRE-Z employs current-mode control with internal compensation, enabling fast transient response and stable operation across wide load and input voltage ranges. Its dual-mode operation-Advanced Asynchronous Modulation (AAM) for light-load efficiency and Forced Continuous Conduction Mode (FCCM) for fixed-frequency noise control-is selected via the MODE pin.
EMI mitigation is implemented through three complementary techniques: frequency spread spectrum (FSS) modulation, out-of-phase synchronized clock output (SYNCO), and symmetric VIN pinout with MeshConnect™ flip-chip packaging. Thermal protection includes 170°C junction shutdown with 20°C hysteresis and frequency foldback during startup to prevent inductor current runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - supports full automotive battery range including cold-crank (down to ~3.3V) and load-dump transients. |
| Output Current | 6A continuous - delivered via integrated 48mΩ HS and 20mΩ LS MOSFETs, minimizing external component count and thermal footprint. |
| Quiescent Current | 1.7μA in shutdown - enables multi-year battery life in always-on telematics and infotainment standby modes. |
| Switching Frequency | 350kHz to 1000kHz, resistor-configurable - allows optimization for size (higher fSW) or efficiency (lower fSW) and EMI filtering design. |
| Feedback Reference | 0.815V ±1.5% - sets precise output regulation; enables 3.3V, 5V, or custom VOUT using standard resistor dividers. |
| EMI Compliance | CISPR25 Class 5 certified - meets stringent automotive radiated/conducted emissions limits without external shielding or complex filters. |
| Thermal Protection | 170°C shutdown with 20°C hysteresis - ensures robust fault tolerance in enclosed automotive enclosures or high-ambient industrial environments. |
Pinout & Package
MP4316AGRE-Z is housed in a thermally enhanced QFN-20 (4mm × 4mm) package with wettable flanks for solder joint inspection. The exposed thermal pad (Pin 20 NC) must be connected to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | Mode selection | Logic-high forces FCCM; logic-low enables AAM for light-load efficiency - must be actively pulled, not floated. |
| 2 SYNCIN | External clock input | Accepts 350–1000kHz sync signal; enables multi-converter phase interleaving and deterministic EMI reduction. |
| 3,12 VIN | Main power input | Dual-pin configuration reduces high di/dt loop area; requires local 10μF ceramic decoupling close to pins. |
| 4,5,10,11 PGND | Power ground return | Four dedicated PGND pins minimize ground bounce and improve current sharing under 6A peak loads. |
| 6 BST | Bootstrap supply | Connects to SW via 0.1μF ceramic capacitor; supplies gate drive for internal high-side MOSFET. |
| 7,8 SW | Switch node | Drives external inductor; high dv/dt node requiring tight layout and minimal trace length to reduce EMI. |
| 9 EN | Enable control | 0.85V threshold enables device; 0.85V hysteresis prevents chatter during noisy supply ramp-up. |
| 13 SYNCO | Synchronized clock output | 180° out-of-phase with internal oscillator - enables interleaved multi-phase designs without external logic. |
| 14 PG | Power good indicator | Open-drain output asserts when VOUT is within ±5% of target - used for system sequencing and fault monitoring. |
| 16 VCC | Bias supply | Internally regulated 4.9V rail powers control circuitry; requires 4.7μF ceramic decoupling to GND. |
| 17 AGND | Analog ground | Separate ground reference for feedback and soft-start circuits - must tie to PGND at single point near IC. |
| 18 FB | Feedback input | Monitors output via resistor divider; 0.815V reference enables accurate regulation independent of input or load variation. |
| 19 SS | Soft-start timing | 13µA current source charges external capacitor - controls output ramp rate to limit inrush current into downstream capacitance. |
| 20 FREQ | Frequency setting | Resistor-to-GND sets fSW per curve on datasheet page 15 - enables precise EMI band placement and filter design. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade operating range | Junction temperature support from –40°C to +125°C - qualified for engine bay and dashboard-mounted electronics. |
| Low-dropout mode | Maintains regulation at VIN as low as 0.815V + VDS(on) - sustains radio operation during 6V cold-crank events without brownout. |
| MeshConnect™ flip-chip packaging | Reduces parasitic inductance by >30% vs. wire-bond QFN - improves switching edge control and EMI performance. |
| Hiccup over-current protection | Current-limit triggers auto-restart after fault clears - prevents thermal runaway during sustained short-circuit conditions. |
| Frequency spread spectrum (FSS) | Modulates fSW by ±10% - spreads energy across 40kHz bandwidth to lower peak conducted/radiated emissions by up to 10dB. |
Applications
| Radios | Battery-Powered Systems |
|---|---|
|
Use Scenario: AM/FM/DAB automotive head units requiring stable 3.3V or 5V rails from 9–16V battery with cold-crank resilience. IC Role / Device Role / Timing Role: Primary buck regulator supplying DSP, tuner, and display subsystems with tight output regulation and low-noise operation. Use Value: Low-dropout mode maintains 5V output during 6V cranking; FSS and CISPR25 Class 5 compliance eliminate need for ferrite beads or shielded inductors. |
Use Scenario: Portable test equipment and handheld meters powered by Li-ion or 2-cell alkaline batteries. IC Role / Device Role / Timing Role: Main system power converter delivering 3.3V at up to 6A peak during measurement bursts while minimizing quiescent drain. Use Value: 1.7μA shutdown current extends shelf life; AAM mode achieves >85% efficiency at 1mA load, critical for long-term data logging. |
| Industrial Power Systems | General-Purpose Consumer Applications |
|
Use Scenario: DIN-rail mounted PLC I/O modules operating from 24V or 48V DC industrial buses with wide ambient temperature swings. IC Role / Device Role / Timing Role: Point-of-load regulator generating isolated 5V/3.3V for microcontrollers, sensors, and communication interfaces. Use Value: 45V max input withstands 48V bus transients; thermal shutdown and hiccup OCP ensure reliable operation in unventilated enclosures. |
Use Scenario: Smart home hubs and set-top boxes requiring compact, low-cost, high-efficiency 5V/3.3V conversion from wall adapters. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 12V adapter output to core logic voltages with minimal BOM count. Use Value: Integrated MOSFETs and QFN-20 package reduce board area by 40% vs. discrete solutions; wettable flanks enable AOI-compatible assembly. |
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 | Automotive-grade AEC-Q100 qualified version with same electrical specs and pinout; higher MSL rating (MSL3 vs MSL1). | Required for safety-critical automotive ECUs where qualification documentation and lot traceability are mandatory. | Select MPQ4316GDE-A when AEC-Q100 compliance and extended temperature validation (-40°C to +125°C) are contractually required. |
| LM61460QWRNRQ1 | TI's 6A automotive buck; 3.3–36V input, 12μA IQ, no FSS, but offers PMBus interface and more comprehensive telemetry. | Suitable for systems needing digital monitoring (VOUT, IOUT, temperature) but lacks CISPR25 Class 5 certification out-of-box. | Choose LM61460QWRNRQ1 only if digital configurability and telemetry outweigh the need for guaranteed EMI compliance and lower shutdown IQ. |
Compared with MPQ4316GDE-A, the MP4316AGRE-Z trades automotive qualification for cost-sensitive industrial and consumer use; versus LM61460QWRNRQ1, it delivers superior EMI performance and lower shutdown current but lacks digital interface and telemetry.
Availability
MP4316AGRE-Z is available at Aetrix Electronics and suitable for automotive infotainment, portable instrumentation, and industrial PLC power supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP4316AGRE-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.
The MP4316A belongs to MPS's automotive-qualified DC/DC converter product line, engineered specifically for demanding 12V/24V/48V vehicle electrical systems where EMI, thermal robustness, and cold-crank operation are critical.
FAQ
What is the minimum recommended output capacitor value for stable operation?
The MP4316AGRE-Z requires ≥47μF total output capacitance with ≤10mΩ ESR for stability across all operating conditions. Ceramic capacitors are preferred; a combination of 22μF X7R + 2×10μF X5R in parallel meets ripple, ESR, and temperature drift requirements per datasheet Section 8.2.
Can the MP4316AGRE-Z operate without an external soft-start capacitor?
No - the SS pin must be connected to a capacitor (typically 10–100nF) to control inrush current. Leaving SS floating causes uncontrolled startup and potential overvoltage stress on downstream components due to missing soft-start ramp control.
How does the MODE pin affect efficiency at light loads?
In AAM mode (MODE = low), the IC skips switching cycles to maintain regulation, reducing switching losses and achieving >85% efficiency at 1mA load. In FCCM mode (MODE = high), fixed-frequency operation increases light-load losses, dropping efficiency to ~65% at same condition.
Is the FREQ pin compatible with standard resistor tolerances?
Yes - the fSW vs. RFREQ curve shows <±3% variation with 1% tolerance resistors. For 470kHz nominal operation, a 62kΩ ±1% resistor yields 420–520kHz, well within the specified 350–1000kHz range and sufficient for EMI filter design margin.
What is the maximum allowable PCB copper area under the thermal pad?
The exposed thermal pad (Pin 20 NC) must connect to ≥200mm² of 2oz copper on inner layers, with ≥8 thermal vias (0.3mm diameter) to internal ground planes. Exceeding this area provides diminishing returns; insufficient area risks junction temperatures exceeding 125°C at 6A full load.
Does the PG output require an external pull-up resistor?
Yes - PG is open-drain and must be pulled up to a valid logic supply (e.g., 3.3V or 5V) with a 10kΩ resistor. Without pull-up, PG remains floating and cannot assert power-good status to system controllers or sequencers.
How does frequency spread spectrum (FSS) impact EMI test margins?
FSS spreads spectral energy over ~40kHz bandwidth, reducing peak radiated/conducted emissions by 6–10dB compared to fixed-frequency operation. This provides ≥5dB margin against CISPR25 Class 5 limits in typical evaluation board layouts without added filtering.
MP4316AGRE-Z 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-Z FAQ
1.How can I place an order for MP4316AGRE-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4316AGRE-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 MP4316AGRE-Z reliable?
The price and inventory of MP4316AGRE-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4316AGRE-Z is usually 5 days.
3.What payment methods are accepted for MP4316AGRE-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4316AGRE-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4316AGRE-Z?
MP4316AGRE-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4316AGRE-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 MP4316AGRE-Z?
For technical support, including MP4316AGRE-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4316AGRE-Z requirements.
6.How does Aetrix verify that MP4316AGRE-Z is sourced from the original manufacturer or authorized distributors?
All MP4316AGRE-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 MP4316AGRE-Z meets industry standards.
7.What is the process for return or replacement of MP4316AGRE-Z?
All MP4316AGRE-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4316AGRE-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 MP4316AGRE-Z part is unused and in its original packaging.
Return procedure for MP4316AGRE-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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