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Monolithic Power Systems Inc. MP3306EG-LF-P
- Part No.:
- MP3306EG-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 12-TFQFN
- Datasheet:
-
MP3306EG-LF-P.pdf
- Description:
- IC LED DRVR RGLTR PWM 1.8A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,611
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Product details
Overview
MP3306EG-LF-P from Monolithic Power Systems is a synchronous step-up white LED driver IC with 3V–12V input, 700kHz fixed-frequency current-mode control, 202mV ±3% feedback reference, and integrated high-side/low-side NMOS switches (RON = 0.6Ω each). It regulates LED string current via external high-side sense resistor and supports analog/PWM dimming in compact 2mm × 2mm QFN12 for space-constrained portable displays.
For engineers reviewing the MP3306EG-LF-P datasheet, MP3306EG-LF-P pinout, MP3306EG-LF-P application, or MP3306EG-LF-P equivalent, key selection criteria include its programmable OVP threshold (1.22V), output disconnect in shutdown, cycle-by-cycle current limiting, thermal shutdown at 150°C, and dual-dimming interface (PWMI/PWMO) for precise brightness control in battery-powered imaging and display systems.
Technical Context
The MP3306EG-LF-P implements a constant-frequency peak-current-mode boost architecture with internal ramp compensation to suppress subharmonic oscillation above 50% duty cycle. Its error amplifier compares 202mV FB voltage against sensed LED current, driving PWM comparator to modulate internal N-channel MOSFETs (M1, M2, M3).
It integrates three protection mechanisms: open-load shutdown triggered by OVP pin voltage ≥1.22V, output short protection via L-pin current limiting, and thermal shutdown at 150°C. The VCC linear regulator (3.9V typ.) powers gate drivers and logic, while BST capacitor enables high-side NMOS drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 12V - Supports single-cell Li-ion (3.0–4.2V) and multi-cell alkaline/NiMH (up to 12V) without external LDO pre-regulation. |
| Switching Frequency | 550–830 kHz (typ. 700 kHz) - Enables use of small 15 µH inductors and ceramic output capacitors <1 µF for minimal board area. |
| Feedback Reference | 202 mV ±3% - Sets LED current as ILED = 202 mV / RSENSE; low value minimizes power loss across sense resistor. |
| OVP Threshold | 1.22 V (programmable via resistor divider on OVP pin) - Configurable open-circuit protection to prevent overvoltage damage during LED string failure. |
| Thermal Shutdown | 150 °C - Internal sensor disables switching until junction cools; prevents permanent die damage under sustained overload or poor PCB thermal design. |
| Quiescent Current | 300–460 µA - Low operating bias enables >100-hour standby in always-on display backlight applications. |
| Enable Threshold | VENHI = 1.1 V, VENLO = 0.6 V - Compatible with 1.8V/3.3V GPIO control without level-shifting circuitry. |
Pinout & Package
MP3306EG-LF-P is housed in a thermally enhanced 12-pin QFN package (2mm × 2mm, 0.4mm pitch) with exposed thermal pad for efficient heat dissipation in high-current LED drive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply rail | Primary power source for internal logic and gate drivers; requires local 1µF ceramic bypass to GND. |
| VCC | Internal LDO output | 3.9V regulated supply for gate drivers and control circuitry; must be bypassed with 1µF ceramic capacitor. |
| EN | Enable control input | Logic-level enable: >1.1V turns IC on; <0.6V forces shutdown and activates output disconnect switch (M1). |
| PWMI | PWM dimming input | Accepts 0.1–50 kHz PWM signal; internally filtered to generate analog control voltage at PWMO pin. |
| PWMO | Analog dimming output | 0–1.2V DC output controlling FB reference (0–0.2V); connect external capacitor for analog dimming or float for direct PWM mode. |
| OVP | Programmable overvoltage sense | Resistor-divider input setting shutdown threshold at 1.22V; latches off until EN or VIN toggled after open-LED fault. |
| FB | Current-sense feedback | Compares voltage across external high-side sense resistor to 202mV reference; determines regulated LED current. |
| GND | Power and signal ground | Common return path for IN, VCC, SW, OUT, BST, and all signal pins; must connect to exposed thermal pad. |
| SW | Switch node | Drain of internal low-side NMOS (M2); connects to inductor; carries high di/dt switching current. |
| OUT | Boost output terminal | Connects to LED anode and output capacitor; requires low-ESR ceramic cap placed adjacent to pin. |
| BST | Bootstrap supply | Forms floating gate drive for high-side NMOS (M3) via capacitor between BST and SW pins. |
| L | Inductor connection | Source of internal disconnect MOSFET (M1); connects to inductor; enables output-to-input isolation during shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated high-side (0.6Ω) and low-side (0.6Ω) NMOS switches eliminate external Schottky diode, improving efficiency by ≥8% at 20mA. |
| Output disconnect in shutdown | Internal M1 MOSFET opens between L and OUT when EN = low, fully discharging output capacitor and preventing LED leakage current. |
| Programmable open-load protection | OVP pin allows user-defined overvoltage threshold (e.g., 18V for 6-LED string) to shut down IC before output exceeds safe limits. |
| Dual dimming interface | Hardware-selectable analog (PWMO voltage) or PWM (PWMI signal) dimming without firmware or external controller. |
| Comprehensive protection suite | Includes UVLO (2.7V), cycle-by-cycle current limit (1.8A), output short protection, and thermal shutdown (150°C). |
Applications
| Smartphone Backlight | Digital Still Camera Flash |
|---|---|
Use Scenario: Driving 4–8 white LEDs in series for main LCD backlight in compact smartphones with 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Constant-current boost controller regulating 20mA per LED string using 202mV FB reference and internal synchronous switches. Use Value: 700kHz switching enables <15µH inductor and 0.22µF ceramic output cap, reducing solution size by 40% vs. 100kHz alternatives. | Use Scenario: Providing high-brightness, short-duration flash illumination (200–500ms) for 1/2.3" image sensors in DSLR-style cameras. IC Role / Device Role / Timing Role: Fast-response current source delivering up to 1.8A peak switch current to charge flash capacitor or drive parallel LED arrays. Use Value: Cycle-by-cycle current limiting and thermal shutdown ensure reliable operation during repeated flash bursts without derating. |
| Portable Media Player Display | Industrial Handheld Scanner |
Use Scenario: Powering 3–5 white LEDs for 3.5–5" TFT-LCD backlights in battery-operated media players with variable ambient light conditions. IC Role / Device Role / Timing Role: Dual-dimming controller accepting either PWM signals (from MCU) or analog voltage (from ambient light sensor) at PWMI/PWMO pins. Use Value: 0.6V/1.1V EN thresholds and 300µA quiescent current extend battery life in always-on display modes. | Use Scenario: Illuminating linear CCD or CMOS barcode sensor arrays in rugged handheld scanners powered by 4×AA alkaline cells (6V nominal). IC Role / Device Role / Timing Role: Input-voltage-tolerant (3–12V) LED driver maintaining stable 20mA current despite battery voltage sag from 6.0V to 4.2V. Use Value: Under-voltage lockout (2.7V) prevents erratic behavior during deep discharge, ensuring consistent scan illumination quality. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT8532GQW | Fixed 1.2MHz switching frequency; 200mV FB reference; no integrated OVP programming pin. | Lacks programmable open-load protection - requires external OVP circuit for LED string fault detection. | Select when higher frequency enables smaller magnetics and system-level EMI filtering is prioritized over fault configurability. |
| LM3409QMYX/NOPB | External MOSFET controller (no internal switches); 200mV FB; adjustable frequency (200kHz–1MHz). | Requires external high-side/low-side FETs and gate drivers - increases BOM count and layout complexity. | Select when >1.8A peak current or >30V output capability is required beyond MP3306EG-LF-P's integrated switch limits. |
Compared with RT8532GQW and LM3409QMYX/NOPB, the MP3306EG-LF-P delivers optimal integration for space-constrained portable devices: its embedded 0.6Ω NMOS switches, programmable OVP pin, and dual-dimming interface reduce component count by ≥4 versus controller-based solutions while maintaining full protection coverage.
Availability
MP3306EG-LF-P is available at Aetrix Electronics and suitable for smartphone backlighting, digital camera flash modules, and portable media player displays requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.
Supply support for MP3306EG-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, LED drivers, and motor control.
The MP3306 belongs to MPS's white LED boost driver product line, engineered specifically for portable imaging and display applications demanding high efficiency, ultra-small footprint, and robust fault protection in 3–12V battery-powered systems.
FAQ
What is the maximum number of white LEDs the MP3306EG-LF-P can drive in series?
The MP3306EG-LF-P supports up to 8 white LEDs in series when powered from 5V input, assuming typical forward voltage of 3.0–3.5V per LED (24–28V total output). Its 30V absolute maximum output rating and 93% max duty cycle allow operation up to ~27V output, verified in Figure 8 of the datasheet with 14V input and 8-LED string.
How does the MP3306EG-LF-P implement analog dimming without an external DAC?
The MP3306EG-LF-P uses an internal 100kΩ resistor between PWMI and PWMO pins. Applying a PWM signal to PWMI creates a filtered DC voltage at PWMO (0–1.2V), which linearly scales the internal 0–0.2V reference used by the error amplifier - eliminating need for external DAC or op-amp circuitry.
Can the MP3306EG-LF-P operate with input voltage below 3V?
No. The MP3306EG-LF-P has a guaranteed minimum input voltage of 3V per Recommended Operating Conditions. Its under-voltage lockout triggers at 2.7V (typ.), and operation below 3V is not characterized - attempting startup below this threshold results in undefined behavior or failure to regulate.
What is the purpose of the L pin, and how does it differ from OUT?
The L pin is the source terminal of the internal disconnect MOSFET (M1). During shutdown (EN = low), M1 opens between L and OUT, isolating the output capacitor and LED string from input - enabling full discharge and zero leakage current. OUT remains the regulated boost output node connected to LED anodes.
Is the MP3306EG-LF-P compatible with ceramic output capacitors only?
Yes. The datasheet specifies ceramic output capacitors (e.g., 0.22µF X7R) placed as close as possible to the OUT and GND pins. Aluminum or tantalum capacitors are not recommended due to higher ESR, which degrades transient response and may cause instability in the current-mode control loop.
Does the MP3306EG-LF-P require external compensation components?
No. The MP3306EG-LF-P features internal compensation optimized for standard 15µH inductors and 0.22µF ceramic output capacitors. No external RC network is needed for stability - simplifying layout and reducing BOM count compared to controller-based boost ICs.
MP3306EG-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 12-TFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 12V
- Voltage - Output:
- 30V
- Current - Output / Channel:
- 1.8A (Switch)
- Frequency:
- 690kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-QFN (2x2)
MP3306EG-LF-P FAQ
1.How can I place an order for MP3306EG-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3306EG-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 MP3306EG-LF-P reliable?
The price and inventory of MP3306EG-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 MP3306EG-LF-P is usually 5 days.
3.What payment methods are accepted for MP3306EG-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3306EG-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3306EG-LF-P?
MP3306EG-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3306EG-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 MP3306EG-LF-P?
For technical support, including MP3306EG-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3306EG-LF-P requirements.
6.How does Aetrix verify that MP3306EG-LF-P is sourced from the original manufacturer or authorized distributors?
All MP3306EG-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 MP3306EG-LF-P meets industry standards.
7.What is the process for return or replacement of MP3306EG-LF-P?
All MP3306EG-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP3306EG-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 MP3306EG-LF-P part is unused and in its original packaging.
Return procedure for MP3306EG-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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