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Monolithic Power Systems Inc. MP8352DL-LF-P
- Part No.:
- MP8352DL-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
MP8352DL-LF-P.pdf
- Description:
- IC REG CTRLR BUCK 14WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,582
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Product details
Overview
MP8352DL-LF-P from Monolithic Power Systems is a synchronous step-down DC/DC converter with integrated 45mΩ high-side MOSFET and external gate driver for low-side synchronous rectification. It delivers 6A continuous output current from a 3V–6V input, operates at fixed 600kHz (synchronizable up to 1.5MHz), and features power-good indication, cycle-by-cycle overcurrent protection with hiccup mode, and thermal shutdown. It targets point-of-load regulation in digital set-top boxes and flat-panel displays.
For engineers reviewing the MP8352DL-LF-P datasheet, MP8352DL-LF-P pinout, MP8352DL-LF-P application, or MP8352DL-LF-P equivalent, key selection criteria include its 3mm × 4mm QFN-14 package, external VCC bias requirement, synchronous gate driver capability (BG pin), adjustable 0.8V reference output voltage, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The MP8352 employs peak-current-mode control with a fixed 600kHz oscillator and supports external synchronization from 300kHz to 1.5MHz via the EN/SYNC pin. Its internal error amplifier compares FB voltage against a precise 0.808V (typ) reference and drives a COMP node for PWM duty-cycle control.
It integrates a high-side MOSFET switch and provides a dedicated BG pin to drive an external low-side MOSFET, enabling synchronous rectification. Bootstrap charging (BST pin) supplies the floating gate driver, while VCC requires an external bias supply decoupled with ≥1μF ceramic capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 6V - Supports single-cell Li-ion, USB PD, and intermediate bus rails without pre-regulation. |
| Continuous Output Current | 6A - Sustains full load under worst-case thermal conditions with proper PCB copper area and airflow. |
| Switching Frequency | Fixed 600kHz (±20%) - Enables compact magnetics; synchronizable to 300kHz–1.5MHz for EMI reduction or system clock alignment. |
| Feedback Reference Voltage | 0.808V (typ) - Sets output voltage via external resistor divider; enables outputs as low as 0.8V with tight regulation. |
| High-Side RDS(ON) | 45mΩ - Minimizes conduction loss at 6A, contributing to >95% peak efficiency at 5VIN/2.5VOUT. |
| Thermal Shutdown Threshold | 150°C - Protects die during overload or poor heatsinking; resumes operation after cooling to ~140°C. |
| Power Good Threshold | 0.74V (typ) with 40mV hysteresis - Provides reliable output voltage monitoring for system sequencing and fault reporting. |
Pinout & Package
MP8352DL-LF-P is housed in a thermally enhanced 3mm × 4mm, 14-pin QFN package with exposed thermal pad. The package supports high-power density designs and requires soldering the exposed pad to a solid ground plane for optimal thermal performance (θJA = 48°C/W on 4-layer PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Feedback Input | Connects to resistor divider midpoint; regulates output by comparing against 0.808V internal reference. |
| 2 PG | Power Good Open-Drain Output | Sinks current when VOUT drops >10% below nominal; requires external 100kΩ pull-up to VCC or VOUT. |
| 3 EN/SYNC | Enable & External Clock Input | Logic-high (>2.0V) enables operation; rising edge of external 300kHz–1.5MHz signal synchronizes internal oscillator. |
| 4,5,6 IN | Main Input Supply | Accepts 3V–6V unregulated input; multiple pins reduce trace resistance and improve high-current path integrity. |
| 7 N/C | No Connect | Internally unused; must remain unconnected and unbonded per datasheet. |
| 8,9,10 SW | Switch Node Output | Drives external inductor; connects to BST capacitor and high-side MOSFET source; carries high di/dt switching current. |
| 11 BST | Bootstrap Capacitor Terminal | Forms floating supply for high-side gate driver; requires 0.1–1μF ceramic capacitor between BST and SW. |
| 12 VCC | External Bias Supply Input | Requires stable 3V–6V external supply (not derived from IN); decoupled with ≥1μF ceramic capacitor. |
| 13 BG | Synchronous Gate Driver Output | Drives gate of external low-side MOSFET; sink/source impedances are 1Ω/4Ω for fast turn-on/turn-off. |
| 14 GND + Exposed Pad | Signal & Thermal Ground | Primary ground reference for FB, PG, EN/SYNC; exposed pad must be soldered to PCB ground plane for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Gate Driver (BG pin) | Delivers 1Ω sink / 4Ω source impedance to drive external low-side MOSFET, eliminating Schottky losses and enabling >95% efficiency. |
| External VCC Bias Requirement | Decouples gate driver and logic supply from noisy input rail, improving noise immunity and allowing optimized bias voltage selection. |
| Cycle-by-Cycle Overcurrent Protection with Hiccup | Detects peak inductor current exceeding ~8A (guaranteed), then enters low-duty-cycle restart mode to limit average short-circuit power dissipation. |
| Stable with Low-ESR Ceramic Output Capacitors | Internal compensation supports 10μF–100μF X5R/X7R ceramics without external compensation components, reducing BOM count and board space. |
| Adjustable Output Voltage (0.8V min) | Uses precision 0.808V feedback reference and standard resistor dividers to support common logic rails (1.2V, 1.8V, 2.5V, 3.3V) with ±1.5% accuracy. |
Applications
| Digital Set-Top Box Power Rails | Flat Panel Display Logic Supply |
|---|---|
|
Use Scenario: Powers SoC core, memory, and video processing ICs in cable/satellite STBs requiring clean, regulated 1.2V/1.8V/3.3V rails. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 6A continuous current with fast transient response to handle burst-mode video decoding loads. Use Value: High efficiency (>92% at 3A) reduces thermal load in sealed enclosures; PG signal enables safe system boot sequencing and watchdog reset. |
Use Scenario: Supplies TCON (timing controller) and panel interface logic in LCD/LED TVs and monitors operating from 5V intermediate bus. IC Role / Device Role / Timing Role: Synchronous buck converter generating stable 1.8V or 2.5V from 5V input, synchronized to system clock to minimize EMI in sensitive analog video paths. Use Value: 600kHz fixed frequency with external sync capability allows EMI energy to be shifted away from critical video bands; low output ripple (<15mVpp) prevents image artifacts. |
| Personal Video Recorder (PVR) Storage Interface | Broadband Communications Gateway |
|
Use Scenario: Powers SATA controller and flash memory subsystems in PVRs where intermittent 4–6A bursts occur during video recording/playback. IC Role / Device Role / Timing Role: High-current POL regulator with hiccup-mode OCP to survive momentary short circuits caused by hot-plug SATA connectors or ESD events. Use Value: Cycle-by-cycle current limiting and thermal shutdown prevent latch-up or damage during connector arcing; compact QFN-14 footprint saves space on dense storage daughterboards. |
Use Scenario: Generates 1.2V/1.5V/1.8V rails for multi-core broadband processors and PHY interfaces in residential gateways and DOCSIS modems. IC Role / Device Role / Timing Role: Efficient intermediate bus converter stepping down from 5V/12V to processor core voltages, supporting dynamic voltage scaling via FB divider programming. Use Value: Adjustable output and precise 0.808V reference enable accurate core voltage tracking; EN/SYNC pin allows coordinated power sequencing across multiple rails in multi-rail systems. |
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 |
|---|---|---|---|
| MP2315DJ-LF-Z | Integrated dual MOSFETs (no external BG driver), 3.3V–18V input, 3A output, 500kHz fixed frequency. | Lacks synchronous gate driver and external VCC bias; suitable only for lower-current, self-contained applications without external FET control. | Select when board space is constrained and 3A output suffices; avoid if external low-side FET optimization or >3A load is required. |
| RT7290BZSP | 3.3V–18V input, 6A output, integrated high/low-side FETs, 600kHz, but no EN/SYNC or PG pin. | Missing power-good signaling and external clock sync - limits use in systems requiring strict power sequencing or EMI-controlled timing. | Choose for cost-sensitive, non-sequenced applications where hiccup OCP and thermal shutdown are sufficient; not recommended for display or STB designs needing PG or sync. |
Compared with MP8352DL-LF-P, MP2315DJ-LF-Z trades gate driver flexibility and bias independence for integration and wider VIN range but halves output current; RT7290BZSP offers full integration but omits critical system-level features (PG, SYNC), reducing design adaptability in complex embedded power trees.
Availability
MP8352DL-LF-P is available at Aetrix Electronics and suitable for digital set-top boxes, flat-panel television logic supplies, personal video recorder storage interfaces, and broadband communications gateways requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP8352DL-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 mixed-signal ICs for power management, motor drive, and automotive applications.
The MP8352 belongs to MPS's high-current synchronous buck converter product line, designed specifically for space-constrained, high-efficiency point-of-load regulation in consumer electronics and communication infrastructure where thermal performance and system-level integration (PG, SYNC, hiccup OCP) are critical.
FAQ
What is the purpose of the external VCC supply requirement for MP8352DL-LF-P?
The MP8352DL-LF-P lacks an internal LDO and requires a clean, stable 3V–6V external VCC supply to power its gate driver, logic, and error amplifier. This decouples biasing from the noisy input rail, improves noise immunity, and allows optimization of VCC voltage for gate drive strength and efficiency-especially critical when driving large external low-side MOSFETs via the BG pin.
Can MP8352DL-LF-P operate without an external synchronous MOSFET?
No. The MP8352DL-LF-P integrates only a high-side MOSFET and requires an external low-side MOSFET driven by the BG pin for synchronous rectification. Operating without it would leave the low-side path uncontrolled, causing catastrophic failure. A Schottky diode cannot substitute-it would violate the device's current-mode control loop and disable hiccup-mode protection.
How does the EN/SYNC pin function in both enable and synchronization modes?
The EN/SYNC pin serves dual roles: applying >2.0V enables operation; pulling <0.4V disables it with 5µs minimum hold time. For synchronization, a clean CMOS-compatible clock (300kHz–1.5MHz) applied to this pin aligns the internal oscillator's rising edge to the external clock's rising edge-enabling deterministic switching and EMI reduction without modifying external components.
Why does MP8352DL-LF-P use a bootstrap capacitor (BST) instead of an integrated charge pump?
The BST pin implements a flying-capacitor bootstrap circuit to generate a gate-drive voltage above the SW node, essential for fully enhancing the high-side MOSFET. This architecture avoids the complexity and quiescent current of an integrated charge pump while maintaining high efficiency. A 0.1–1μF ceramic capacitor between BST and SW is mandatory; omission causes immediate high-side FET failure.
What thermal design considerations apply to the exposed pad on the QFN-14 package?
The exposed pad is electrically GND and thermally critical: it must be soldered to a dedicated PCB ground plane with ≥4 thermal vias (0.3mm diameter, filled or capped) connecting to inner/inner ground layers. Insufficient copper area or via count raises θJA beyond 48°C/W, risking thermal shutdown at ≤4A load-even with ambient <25°C-due to junction temperature exceeding 150°C.
Is the MP8352DL-LF-P compatible with ceramic output capacitors smaller than 10μF?
Yes, but stability must be verified. The MP8352DL-LF-P is optimized for 10μF–100μF low-ESR X5R/X7R ceramics. Capacitors <10μF may cause phase margin degradation or audible switching noise due to insufficient bulk capacitance. If used, re-evaluate loop compensation with network analyzer measurements and confirm <10mVpp output ripple under full load transients.
Does the hiccup-mode overcurrent protection automatically recover after fault removal?
Yes. When FB voltage falls below ~0.25V (indicating severe overload or short), the MP8352DL-LF-P enters hiccup mode: it disables switching for ~10ms, then attempts restart. If the fault persists, it repeats. Once the short is removed and FB rises above threshold, normal PWM operation resumes within one switching cycle-no manual reset or power cycle is needed.
MP8352DL-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 6V
- Frequency - Switching:
- 600kHz
- Duty Cycle (Max):
- 90%
- Synchronous Rectifier:
- No
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Power Good
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x4)
MP8352DL-LF-P FAQ
1.How can I place an order for MP8352DL-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8352DL-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 MP8352DL-LF-P reliable?
The price and inventory of MP8352DL-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 MP8352DL-LF-P is usually 5 days.
3.What payment methods are accepted for MP8352DL-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8352DL-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8352DL-LF-P?
MP8352DL-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8352DL-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 MP8352DL-LF-P?
For technical support, including MP8352DL-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8352DL-LF-P requirements.
6.How does Aetrix verify that MP8352DL-LF-P is sourced from the original manufacturer or authorized distributors?
All MP8352DL-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 MP8352DL-LF-P meets industry standards.
7.What is the process for return or replacement of MP8352DL-LF-P?
All MP8352DL-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP8352DL-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 MP8352DL-LF-P part is unused and in its original packaging.
Return procedure for MP8352DL-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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