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Monolithic Power Systems Inc. MP8619EQJ-LF-P
- Part No.:
- MP8619EQJ-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 30-VFQFN Exposed Pad
- Datasheet:
-
MP8619EQJ-LF-P.pdf
- Description:
- IC REG BUCK ADJ 8A 30QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,399
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Product details
Overview
MP8619EQJ-LF-P from Monolithic Power Systems is a synchronous step-down DC/DC converter with integrated 50mΩ high-side and 8mΩ low-side MOSFETs, delivering 8A continuous output current across 4.5V–25V input range, fixed 600kHz switching frequency, and adjustable 0.8V–15V output voltage-used in networking systems and digital set-top boxes for compact, high-current local regulation.
For engineers reviewing the MP8619EQJ-LF-P datasheet, MP8619EQJ-LF-P pinout, MP8619EQJ-LF-P application, or MP8619EQJ-LF-P equivalent, key selection criteria include internal MOSFET RDS(on), thermal shutdown at 150°C, EN/SYNC dual-function pin, 30-pin QFN package layout constraints, and end-of-life status requiring migration planning to NB700 or NB693A.
Technical Context
The MP8619 operates in peak current-mode control with internal compensation, enabling stable loop response without external Type-II/III networks. Its proprietary switching loss reduction technique improves efficiency at high duty cycles, while the bootstrap circuit (BST pin + SW-to-BST capacitor) sustains high-side gate drive above VIN.
Current-mode architecture delivers fast transient response to load steps up to 8A, and cycle-by-cycle overcurrent protection triggers hiccup mode upon sustained short-circuit-reducing average fault current and die temperature rise. UVLO (4.0V rising, 3.2V falling) ensures reliable startup only when VCC regulator output is valid.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 25V - supports 5V, 12V, and 24V industrial rails without pre-regulation |
| Output Current | 8A continuous - enables single-chip power delivery for FPGA I/O banks or multi-core SoC domains |
| Switching Frequency | Fixed 600kHz - balances EMI filtering cost and inductor size; syncable 300kHz–2MHz |
| Feedback Reference | 0.808V ±20mV - sets output accuracy; enables 0.8V–15V adjustment via resistor divider |
| HS/LS RDS(on) | 50mΩ / 8mΩ - reduces conduction loss at full load; enables >90% efficiency at 12V→3.3V/8A |
| Thermal Shutdown | 150°C with 140°C hysteresis - protects against sustained overload or poor PCB heatsinking |
| OCP Threshold | 9.5A - provides margin above 8A rating while limiting fault energy during short circuits |
Pinout & Package
The MP8619EQJ-LF-P is housed in a thermally enhanced 5mm × 6mm, 30-pin QFN package with exposed thermal pad (pin 9–15, 20, 21, 30 = GND; pin 16–19 = SW; pin 22 = VCC; pin 23 = BST; pin 24 = FB; pin 25 = PG; pin 26 = EN/SYNC; pins 27–29 = IN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (27–29) | Power Input | Accepts 4.5V–25V; requires low-ESR input capacitor near pins to suppress switching noise |
| SW (16–19) | Switch Node | High-current path to external inductor; must use wide copper traces and multiple vias to GND |
| BST (23) | Bootstrap Supply | Connects to SW via 0.1–1µF ceramic capacitor; enables high-side gate drive above VIN |
| FB (24) | Voltage Feedback | Senses output via resistor divider; internal 0.808V reference sets regulation point |
| PG (25) | Power Good Output | Open-drain signal asserting when VOUT is within ±10% of target; 25µs delay prevents false trips |
| EN/SYNC (26) | Enable & Clock Sync | Pull ≥2V to enable; apply external 300kHz–2MHz clock to synchronize switching and reduce EMI |
Key Features
| Feature | Design Value |
|---|---|
| Internal Compensation | Eliminates need for external compensation network-reduces BOM count and layout sensitivity |
| Proprietary Switching Loss Reduction | Optimizes gate drive timing and overlap control to minimize shoot-through and Miller losses |
| Integrated Power MOSFETs | 50mΩ HS + 8mΩ LS devices co-packaged-enables compact 5×6mm footprint without discrete FETs or drivers |
| Hiccup-Mode OCP | Enters periodic restart on sustained overcurrent-limits average power dissipation and prevents thermal runaway |
| Soft-Start Ramp | Internally generates 0–1.2V SS voltage to limit inrush current and prevent output overshoot at startup |
Applications
| Networking Systems | Digital Set Top Boxes |
|---|---|
Use Scenario: Powering 12Gbps SerDes lanes and PHY interface circuitry in enterprise switches. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 1.2V/8A to high-speed transceivers. Use Value: Internal MOSFETs and 600kHz operation minimize board area and filter component count versus discrete solutions. | Use Scenario: Supplying 3.3V/5V rails to video decoding SoCs and HDMI transmitter ICs. IC Role / Device Role / Timing Role: Main system regulator managing dynamic load transients from bursty video decode workloads. Use Value: Fast current-mode response maintains <±1% output regulation during 5A load steps typical in media playback. |
| Distributed Power Systems | Industrial Embedded Controllers |
Use Scenario: Local 5V/8A conversion from 24V backplane in modular PLC I/O modules. IC Role / Device Role / Timing Role: Isolated secondary-side buck converter replacing linear regulators for thermal efficiency. Use Value: 8A capability eliminates need for paralleling smaller converters-reducing design complexity and failure points. | Use Scenario: Powering ARM Cortex-A series processors and DDR3 memory subsystems in HMI panels. IC Role / Device Role / Timing Role: Core voltage regulator with EN/SYNC pin synchronized to system clock to suppress beat-frequency EMI. Use Value: Sync capability allows deterministic noise placement-critical for meeting Class B EMC limits in factory environments. |
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 |
|---|---|---|---|
| NB700 | Higher 10A output rating; 2.5V–18V input; 750kHz fixed frequency; improved light-load efficiency | Supports higher current loads and lower input voltages-suitable for next-gen designs migrating from MP8619 | Select when upgrading for >8A demand or tighter input range (e.g., 5V-only systems) |
| NB693A | 8A output; 4.5V–25V input; 650kHz switching; enhanced thermal performance (θJA = 28°C/W) | Direct functional replacement with better thermal metrics-ideal for space-constrained or high-ambient-temp deployments | Select for drop-in compatibility where thermal headroom is critical (e.g., sealed enclosures) |
Compared with MP8619EQJ-LF-P, NB700 offers higher current and wider low-end input support but narrower max VIN, while NB693A retains identical voltage range and current rating with superior thermal resistance-making it the preferred direct replacement for legacy designs needing extended lifecycle support.
Availability
MP8619EQJ-LF-P is available at Aetrix Electronics and suitable for networking systems, digital set-top boxes, and distributed power systems requiring stable component supply during end-of-life transition planning.
Supply support for MP8619EQJ-LF-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 analog and power ICs, with core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MP8619 belongs to MPS's high-current integrated buck converter product line, designed specifically for space-constrained, high-efficiency point-of-load applications in communications and consumer electronics where minimal external components and robust thermal behavior are essential.
FAQ
Is MP8619EQJ-LF-P still in active production?
No-MP8619EQJ-LF-P is officially marked End of Life (EOL) by Monolithic Power Systems. The datasheet explicitly directs users to migrate to NB700 or NB693A. Aetrix Electronics maintains limited legacy stock for last-time buy and design continuity support, but no new wafer starts are planned.
What is the function of the BST pin, and what capacitor value is required?
The BST (bootstrap) pin supplies floating gate drive voltage to the high-side MOSFET. A 0.1µF to 1µF X7R ceramic capacitor must be placed between BST and SW pins. This capacitor charges during low-side conduction and powers the high-side driver during its on-time-ensuring reliable 100% duty cycle capability and minimizing body diode conduction loss.
Can MP8619EQJ-LF-P operate with an input voltage below 4.5V?
No-it will not start or regulate reliably below 4.5V due to UVLO activation. The absolute minimum operating VIN is 4.5V (rising threshold), and the internal VCC regulator requires ≥4.0V to power control circuitry. Attempting operation at 3.3V or 4.2V results in intermittent enable/disable cycling or complete shutdown.
How does the EN/SYNC pin behave when used for synchronization?
When an external clock (300kHz–2MHz) is applied to EN/SYNC, the MP8619 locks its internal oscillator to the rising edge of that signal-eliminating switching frequency jitter and enabling deterministic EMI spectrum placement. The pin retains enable functionality: logic-high (>2V) enables regulation; logic-low (<0.4V) disables all switching and reduces quiescent current to 1µA.
What is the maximum allowable output voltage ripple for stable operation?
Stability is maintained with ≤1% peak-to-peak output ripple (e.g., ≤33mV for 3.3V output). Exceeding this-due to insufficient output capacitance, high ESR, or undersized inductor-can cause feedback loop instability, audible switching noise, or premature PG deassertion. Ceramic capacitors with ≤5mΩ ESR and ≥47µF total capacitance are recommended for 8A loads.
Does MP8619EQJ-LF-P support forced PWM mode at light load?
No-it operates exclusively in peak current-mode control with automatic pulse-skipping at light loads to improve efficiency. There is no dedicated pin or register to force continuous conduction mode (CCM); the device transitions naturally between CCM and discontinuous conduction mode (DCM) based on load current and inductor value-no user intervention required.
What PCB layout practices are mandatory for thermal reliability?
Thermal reliability requires soldering the exposed thermal pad (pins 9–15, 20, 21, 30) directly to a solid internal or bottom-layer GND plane using ≥9 thermal vias (0.3mm diameter, spaced ≤1mm apart). IN, SW, and GND traces must be ≥1.5mm wide with 2oz copper; feedback traces must be routed away from SW and kept under 5mm in length to avoid noise coupling into the 0.808V reference path.
MP8619EQJ-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 30-VFQFN Exposed Pad
- 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):
- 4.5V
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 15V
- Current - Output:
- 8A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 30-QFN (5x6)
MP8619EQJ-LF-P FAQ
1.How can I place an order for MP8619EQJ-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8619EQJ-LF-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 MP8619EQJ-LF-P reliable?
The price and inventory of MP8619EQJ-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8619EQJ-LF-P is usually 5 days.
3.What payment methods are accepted for MP8619EQJ-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8619EQJ-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8619EQJ-LF-P?
MP8619EQJ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8619EQJ-LF-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 MP8619EQJ-LF-P?
For technical support, including MP8619EQJ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8619EQJ-LF-P requirements.
6.How does Aetrix verify that MP8619EQJ-LF-P is sourced from the original manufacturer or authorized distributors?
All MP8619EQJ-LF-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 MP8619EQJ-LF-P meets industry standards.
7.What is the process for return or replacement of MP8619EQJ-LF-P?
All MP8619EQJ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP8619EQJ-LF-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 MP8619EQJ-LF-P part is unused and in its original packaging.
Return procedure for MP8619EQJ-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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