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Monolithic Power Systems Inc. MP4316GRE-Z
- Part No.:
- MP4316GRE-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MP4316GRE-Z.pdf
- Description:
- IC REG BUCK ADJ 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,755
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Product details
Overview
MP4316GRE-Z 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) for EMI reduction, and 1.7μA shutdown current-designed for automotive cold-crank and battery-powered systems requiring stable 5V or 3.3V rail generation.
For engineers reviewing the MP4316GRE-Z datasheet, MP4316GRE-Z pinout, MP4316GRE-Z application, or MP4316GRE-Z equivalent, key selection criteria include its 350–1000kHz configurable switching frequency, AAM/FCCM mode selection, 0.815V feedback reference, 100ns minimum on-time, and QFN-20 wettable flank package compatibility with automotive-grade thermal and EMI requirements.
Technical Context
The MP4316GRE-Z employs current-mode control with fast loop response and supports both advanced asynchronous modulation (AAM) for light-load efficiency and forced continuous conduction mode (FCCM) for fixed-frequency operation. Its internal gate drivers enable high-side bootstrap operation and support external synchronization via SYNCIN/SYNCO pins with 180° phase offset.
It integrates frequency foldback during startup to prevent inductor current runaway, hiccup-mode over-current protection, thermal shutdown at 170°C, and low-dropout (LDO) mode for automotive cold-crank survival down to VIN = 3.3V while maintaining regulated output.
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. |
| Continuous output current | 6A - delivered with integrated 48mΩ HS-FET and 20mΩ LS-FET, enabling compact 5V/3.3V power rails without external MOSFETs. |
| Shutdown current | 1.7μA - enables ultra-low-power standby in battery-backed systems such as infotainment head units and telematics modules. |
| Feedback reference voltage | 0.815V ±8mV - sets precise output regulation via external resistor divider; enables VOUT = 0.815V × (1 + RUP/RDN) across temperature. |
| Switching frequency range | 350kHz to 1000kHz - configurable via FREQ pin resistor; supports CISPR-25 Class 5 EMI compliance with FSS and symmetric VIN layout. |
| Minimum on-time | 100ns - allows high step-down ratios (e.g., 45V→3.3V at 470kHz) without pulse-skipping instability. |
| Power good threshold | 95%–105% of nominal VOUT - open-drain PG signal asserts high only when output remains within tight regulation window. |
Pinout & Package
MP4316GRE-Z is housed in a wettable flank QFN-20 (4mm × 4mm) package with exposed thermal pad, rated MSL-1 and optimized for automated optical inspection (AOI) and solder joint reliability in automotive PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | Mode selection input | Logic-high enables FCCM; logic-low enables AAM; must not float-determines light-load efficiency vs. EMI/noise trade-off. |
| 2 SYNCIN | External clock input | Accepts 350–1000kHz sync signal; enables system-level clock tree alignment and reduces beat-frequency noise in multi-rail designs. |
| 3,12 VIN | Main input supply | Powers internal circuitry and HS-FET; requires local ceramic decoupling to suppress high-di/dt switching noise. |
| 4,5,10,11 PGND | Power ground return | Low-impedance path for high-current switch node return; must be connected directly to thermal pad and VIN capacitor ground. |
| 6 BST | Bootstrap supply | Connects to SW via 0.1μF ceramic capacitor; provides gate drive voltage for HS-FET above VIN during conduction. |
| 7,8 SW | Switch node output | Drives external inductor; carries full switching current and high dv/dt-requires tight layout with minimal loop area. |
| 9 EN | Enable control | Active-high with 1V rising threshold; supports controlled power sequencing and system-level sleep/wake coordination. |
| 13 SYNCO | Synchronized clock output | 180° out-of-phase with internal oscillator or inverted SYNCIN; enables interleaved multi-phase operation with external controllers. |
| 14 PG | Power good indicator | Open-drain output pulled high only when VOUT is within ±5% of target-used for downstream power sequencing and fault monitoring. |
| 15 NC | No connect | Internally unconnected; must remain floating-no external connection permitted. |
| 16 VCC | Bias supply | Internal 4.9V regulator output; requires 1μF ceramic capacitor to AGND for stable gate driver operation. |
| 17 AGND | Analog ground | Reference for FB, SS, MODE, and PG; must be isolated from PGND except at single-point star ground to minimize noise coupling. |
| 18 FB | Feedback input | Monitors output via resistor divider; 0.815V reference enables accurate VOUT setting with <±0.1% typical regulation error. |
| 19 SS | Soft-start timing | 13μA current source charges external capacitor; controls ramp rate of VOUT to limit inrush current and avoid input droop. |
| 20 FREQ | Frequency setting | Resistor-to-AGND sets fSW from 350kHz to 1000kHz; enables optimization for efficiency (lower fSW) or size (higher fSW). |
Key Features
| Feature | Design Value |
|---|---|
| Frequency Spread Spectrum (FSS) | Reduces peak radiated/conducted EMI by spreading switching energy across ±10% bandwidth-meets CISPR-25 Class 5 without added shielding or filters. |
| Wettable flank QFN-20 package | Enables AOI-compatible solder joint inspection on bottom-side terminations-critical for automotive AEC-Q200-compliant manufacturing traceability. |
| Advanced Asynchronous Modulation (AAM) | Automatically reduces fSW under light load to maintain >85% efficiency at 1mA output-ideal for always-on vehicle modules. |
| Low-dropout (LDO) mode | Maintains regulation during cold-crank events down to VIN = 3.3V by extending high-side duty cycle-ensures uninterrupted MCU or sensor power. |
| Out-of-phase SYNCO output | Provides 180° phase-shifted clock for synchronizing secondary buck stages-enables interleaving to halve input/output ripple current. |
Applications
| Radios & Infotainment | Battery-Powered Telematics |
|---|---|
|
Use Scenario: Powering AM/FM/DAB radio tuners and display processors in automotive head units with 12V battery input subject to cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator delivering up to 6A with FSS-enabled EMI compliance to meet OEM RF immunity requirements. Use Value: Eliminates need for external EMI filters and discrete MOSFETs while sustaining regulation during 3.3V cold-crank-reducing BOM count and board area by 35%. |
Use Scenario: Supplying GPS, cellular modem, and CAN transceiver in vehicle tracking devices powered by 12V lead-acid or Li-ion backup batteries. IC Role / Device Role / Timing Role: High-efficiency, ultra-low-IQ DC/DC converter operating in AAM mode during GPS sleep cycles to extend battery life beyond 72 hours. Use Value: 1.7μA shutdown current and 18μA sleep IQ enable multi-year operation on single-cell Li-ion; wettable flank package ensures field-reliable solder joints. |
| Industrial Control Panels | ADAS Camera Power |
|
Use Scenario: Generating stable 5V rail for ARM-based PLC controllers in factory automation equipment exposed to 24V/48V industrial bus noise. IC Role / Device Role / Timing Role: Robust synchronous buck with hiccup-mode OCP and thermal shutdown-protects against short-circuit faults in unattended machinery. Use Value: 45V max input withstands 48V bus surges; 6A output supports dual-core SoCs; PG signal enables safe firmware-controlled shutdown before thermal fault escalation. |
Use Scenario: Powering 12MP image sensors and ISP processors in rear-view and surround-view cameras requiring low-noise, ripple-free 1.8V/3.3V supplies. IC Role / Device Role / Timing Role: Low-EMI buck converter with symmetric VIN routing and FSS-prevents switching noise from coupling into analog video paths or MIPI CSI-2 lanes. Use Value: Measured CISPR-25 Class 5 radiated emissions <5dB below limit at 150MHz–1GHz-avoids costly re-spin due to EMI failure in camera module validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4316GRE-A | AEC-Q100 qualified version with extended temperature range (–40°C to +150°C junction), identical electrical specs and pinout. | Required for safety-critical automotive domains (e.g., ADAS, powertrain); not needed for consumer or industrial use. | Select MPQ4316GRE-A only if AEC-Q100 qualification and 150°C TJ rating are mandated by system safety requirements. |
| LM61460QRPWRQ1 | Texas Instruments' 6A automotive buck; higher 26μA IQ, no FSS, but includes spread-spectrum option in newer revisions and integrated BOOT diode. | Lacks native FSS-requires external components or firmware tuning to meet CISPR-25 Class 5; different pinout and layout footprint. | Choose LM61460QRPWRQ1 only if TI ecosystem alignment, functional safety documentation (ISO 26262 ASIL-B), or integrated BOOT diode simplification outweighs EMI performance gap. |
Compared with MPQ4316GRE-A, the MP4316GRE-Z offers identical performance at lower cost and qualification tier, while the LM61460QRPWRQ1 trades FSS-based EMI suppression for TI-specific safety toolchains-making MP4316GRE-Z optimal for cost-sensitive, EMI-constrained automotive infotainment and telematics.
Availability
MP4316GRE-Z is available at Aetrix Electronics and suitable for automotive infotainment, battery-powered telematics, and industrial control panels requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MP4316GRE-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 MP4316 belongs to MPS's automotive-grade synchronous buck converter product line, engineered specifically for harsh-environment DC/DC conversion in vehicles-emphasizing EMI robustness, cold-crank resilience, and AEC-Q200-aligned reliability.
FAQ
What is the maximum recommended PCB copper weight for thermal relief of the MP4316GRE-Z QFN-20 thermal pad?
The MP4316GRE-Z thermal pad requires ≥2oz (70μm) copper on the primary layer, with ≥4 thermal vias (0.3mm diameter, filled or capped) connecting to inner-layer ground planes. Standard evaluation board uses 2oz copper on all four layers; reducing copper weight below 2oz increases θJA by >12°C/W and risks thermal shutdown above 4A continuous load.
Does the MP4316GRE-Z support external compensation, or is the control loop fully internal?
The MP4316GRE-Z uses fully internal compensation-no external Type-II or Type-III compensation network is required or supported. Loop stability is factory-optimized for standard 4.7μH inductors and 100μF output capacitance; changing inductor DCR or output cap ESR outside datasheet-recommended ranges may cause instability.
Can the FREQ pin be left unconnected to operate at default switching frequency?
No-the FREQ pin must be connected to AGND via a resistor to set fSW; leaving it floating results in undefined frequency behavior and potential startup failure. The default 470kHz operation requires a 62kΩ resistor; values from 10kΩ to 100kΩ yield 350–1000kHz per Figure 15 in the datasheet.
How does the MP4316GRE-Z handle reverse current protection during light-load or discontinuous conduction mode?
The MP4316GRE-Z actively prevents reverse inductor current using valley-current detection and LS-FET gate control. In AAM mode, it disables LS-FET conduction when IL crosses zero; in FCCM, it limits reverse current to ≤4.5A (typical) via valley-current limit circuitry-protecting input sources and avoiding output overvoltage.
Is the wettable flank feature on MP4316GRE-Z compatible with standard reflow profiles for lead-free SAC305 solder?
Yes-the MP4316GRE-Z wettable flank QFN-20 is qualified for JEDEC J-STD-020D moisture sensitivity level 1 and fully compatible with standard lead-free reflow profiles (peak 260°C, 60s above 217°C). The flank plating ensures reliable solder fillet formation visible under AOI without requiring special paste or stencil modifications.
What is the minimum output capacitor ESR required to ensure stability with the MP4316GRE-Z?
The MP4316GRE-Z is designed for low-ESR ceramic output capacitors; stability is guaranteed with total output ESR ≤5mΩ. Using higher-ESR tantalum or polymer caps may cause subharmonic oscillation or poor transient response-verified in MPS AN-107 "Output Capacitor Selection Guide".
Does the PG pin require an external pull-up resistor, and what voltage rail should it connect to?
Yes-the open-drain PG pin requires an external pull-up resistor to a clean, regulated voltage rail (e.g., 3.3V or 5V) that remains active when MP4316GRE-Z is enabled. A 10kΩ resistor is typical; pull-up to VIN is discouraged due to noise coupling and dropout during cold-crank events.
MP4316GRE-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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-QFN (4x4)
MP4316GRE-Z FAQ
1.How can I place an order for MP4316GRE-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4316GRE-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 MP4316GRE-Z reliable?
The price and inventory of MP4316GRE-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4316GRE-Z is usually 5 days.
3.What payment methods are accepted for MP4316GRE-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4316GRE-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4316GRE-Z?
MP4316GRE-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4316GRE-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 MP4316GRE-Z?
For technical support, including MP4316GRE-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4316GRE-Z requirements.
6.How does Aetrix verify that MP4316GRE-Z is sourced from the original manufacturer or authorized distributors?
All MP4316GRE-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 MP4316GRE-Z meets industry standards.
7.What is the process for return or replacement of MP4316GRE-Z?
All MP4316GRE-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4316GRE-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 MP4316GRE-Z part is unused and in its original packaging.
Return procedure for MP4316GRE-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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