Part Number: MP3302DJ-LF-Z

Manufacturer: Monolithic Power Systems Inc.


Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

Technical Specifications of MP3302DJ-LF-Z

Datasheet  MP3302DJ-LF-Z datasheet
Category Integrated Circuits (ICs)
Family PMIC – LED Drivers
Manufacturer Monolithic Power Systems Inc.
Packaging Tape & Reel (TR)
Part Status Active
Type DC DC Regulator
Topology Step-Up (Boost)
Internal Switch(s) Yes
Number of Outputs 1
Voltage – Supply (Min) 2.5V
Voltage – Supply (Max) 6V
Voltage – Output 36V
Current – Output / Channel 1.33A (Switch)
Frequency 1.3MHz
Dimming Single-Wire
Applications Backlight
Operating Temperature -40°C ~ 125°C (TJ)
Mounting Type Surface Mount
Package / Case SOT-23-5 Thin, TSOT-23-5
Supplier Device Package TSOT-23-5


The MP3302DJ-LF-Z is a flexible step-up converter developed for powering white LED arrays from a single-cell lithium-ion battery. In this detailed tutorial, we will look at the MP3302DJ-LF-Z’s features, applications, and essential specs, allowing you to fully utilize its capabilities.

Operating Principle

The MP3302DJ-LF-Z is a step-up converter designed to drive arrays of white LEDs efficiently from a single-cell lithium-ion battery. Its basic operating principle is as follows:

  • Current Mode Control:To adjust the LED current, the MP3302DJ-LF-Z uses a current mode control mechanism. This means it keeps a constant current running through the LEDs, which is essential for uniform brightness and extending LED lifespan.
  • Fixed Frequency Architecture:The converter runs at a constant switching frequency of 1.3MHz. This constant frequency promotes consistent performance and reduces electromagnetic interference (EMI).
  • External Current Sense Resistor:The MP3302DJ-LF-Z uses an external current sensing resistor to regulate the LED current. This component enables the gadget to gauge current and modify it to achieve the required brightness levels.
  • Internal Power MOSFET:The integrated power MOSFET in the converter simplifies the circuit design and saves space on the PCB. The MOSFET is an important component for switching and managing the current flow to the LEDs.
  • Low Feedback Voltage:The feedback voltage for the MP3302DJ-LF-Z is 200mV. This low voltage reduces power loss, resulting in increased system efficiency.
  • Over-Voltage Protection:The MP3302DJ-LF-Z contains built-in protection mechanisms that switch the device off in the event of an over-voltage scenario, such as an open circuit. This protects both the LEDs and the converter from harm.
  • Under-Voltage Lockout (UVLO):Under-voltage lockout is built into the converter, which helps to protect the battery by ensuring that it runs within a safe voltage range.
  • Internal Current Limit:An internal current limit of 1.3A protects the LEDs and the converter from overloading, further boosting system safety.
  • Thermal Shutdown:Thermal overload protection is built into the MP3302DJ-LF-Z to avoid overheating. If the device detects high heat, it will shut down to protect itself.

Key Features

The MP3302DJ-LF-Z boasts a range of key features that make it an ideal choice for driving white LEDs efficiently:

  • Internal Power MOSFET: Including an internal power MOSFET simplifies circuit design and saves space on the PCB, resulting in a compact and efficient solution.
  • Drives up to 10 Series White LEDs: The converter can effectively power up to 10 series-connected white LEDs, making it appropriate for a wide range of LED array applications.
  • Efficiency of up to 87%: The high efficiency of up to 87% ensures that the power from the battery is effectively turned into LED illumination, hence extending battery life.
  • Single-Wire Dimming Control: The converter provides single-wire dimming control, allowing for simple LED brightness adjustment without the need for complicated control interfaces.
  • Set Switching Frequency of 1.3MHz: The set switching frequency of 1.3MHz ensures reliable LED operation by providing consistent performance and minimizing EMI.
  • Open Load Shutdown: The converter has protective measures that shut down the device in the face of an over-voltage condition, such as an open circuit, protecting both the LEDs and the converter.
  • Low 200mV Feedback Voltage: A low feedback voltage reduces power loss and so improves the overall efficiency of the LED lighting system.
  • UVLO, Thermal Shutdown: The MP3302DJ-LF-Z prioritizes safety by avoiding under-voltage operation and protecting against thermal concerns with under-voltage lockout and thermal shutdown features.
  • Internal 1.3A Current Limit: This function guarantees that the LED current does not exceed safe levels, preventing overloading and potential damage.
  • TSOT23-5 and 2mm x 3mm QFN8 packages are available. Packages: The converter is available in a variety of compact and variable package solutions, making it appropriate for a wide range of design needs and applications.

These key features collectively make the MP3302DJ-LF-Z a highly efficient and reliable solution for driving white LEDs from a single-cell lithium-ion battery while ensuring the safety and longevity of the LED array.

Applications of MP3302DJ-LF-Z

The MP3302DJ-LF-Z is a versatile step-up converter that finds use in a variety of settings where driving arrays of white LEDs efficiently from a single-cell lithium-ion battery is critical. Here are some notable examples:

Illuminating LCD Panels

The MP3302DJ-LF-Z is essential for illuminating LCD screens, particularly medium-sized displays spanning from 5 to 7 inches. It improves the visual quality of these panels by guaranteeing consistent LED brightness and efficiency. This is a common application in:

  • Portable Monitors: The MP3302DJ-LF-Z is used in many portable monitors and display screens to provide uniform and energy-efficient backlighting.
  • Automotive Displays: This converter provides reliable illumination for in-car entertainment systems and digital dashboards.

Powering Handheld Devices

To maximize battery life, handheld devices such as cellphones, tablets, and PDAs require efficient power management. The MP3302DJ-LF-Z assists in powering white LEDs in various devices, resulting in longer battery life and constant display quality.

  • Smartphones: LED flash units for cameras, notification LEDs, and backlighting in smartphone displays are just a few applications for this converter.
  • Tablets: The converter improves the backlighting on tablet screens, resulting in a more enjoyable user experience.

Enhancing Digital Still Cameras

The MP3302DJ-LF-Z can benefit digital cameras, particularly compact point-and-shoot models, by improving low-light shooting and energy economy.

  • LED Flash: The converter can be used in LED flash modules to provide adequate and consistent illumination for taking high-quality images in a variety of lighting circumstances.
  • Backlit Displays: Some digital cameras have backlit displays for adjusting settings and reviewing photos. These displays can be powered efficiently by the MP3302DJ-LF-Z.

Small LCD Displays

Smaller LCD panels are ubiquitous in consumer electronics, and the MP3302DJ-LF-Z may provide effective LED backlighting in such devices.

  • Wearable Technology: Small LCD displays are used in devices such as smartwatches and fitness trackers. This converter guarantees that these displays may be seen in a variety of lighting settings.
  • Consumer Electronics: compact LCD panels are commonly found in products such as remote controls, compact digital clocks, and other household electronics. In these situations, the MP3302DJ-LF-Z aids in maintaining consistent visibility.

The ability of the MP3302DJ-LF-Z to efficiently drive white LED arrays while providing features such as fixed frequency control, current limiting, and protective mechanisms makes it a flexible component for improving the performance and visual quality of a wide range of devices and displays. Its applications include any situation in which efficient LED illumination from a single-cell lithium-ion battery is required.

Efficiency and Performance

● Driving Up to 10 Series White LEDs

The MP3302DJ-LF-Z efficiently drives up to 10 white LEDs in series, simplifying circuit design and ensuring uniform brightness.

● Achieving Up to 87% Efficiency

With up to 87% efficiency, the converter maximizes battery life in portable devices by minimizing wasted energy.

● Single Wire Dimming Control

Single wire dimming control simplifies LED brightness adjustments, enhancing user convenience and reducing the need for complex controls.

● 1.3MHz Fixed Switching Frequency

The 1.3MHz fixed switching frequency ensures stable performance, minimizes EMI, and provides tighter control over LED current.

Protection and Safety Features

● Over-Voltage Protection

The converter’s over-voltage protection safeguards LEDs and the device from voltage spikes and open circuit situations.

● Low Feedback Voltage for Reduced Power Loss

With a 200mV feedback voltage, power loss is minimized, leading to increased efficiency and extended battery life.

● Under-Voltage Lockout (UVLO)

UVLO protects the battery by preventing deep discharges when the voltage falls below a safe threshold.

● Internal 1.3A Current Limit

The 1.3A internal current limit prevents LED damage in case of an output overload.

● Thermal Shutdown

Thermal overload protection ensures the device’s safety by shutting down in case of excessive temperatures, safeguarding both the circuit and LEDs.


In summary, the MP3302DJ-LF-Z is a dependable, efficient solution for a wide range of applications, including LCD panels, mobile devices, and digital cameras, with better performance, prolonged battery life, and consistent illumination. It is a must-have option for the future of LED-powered systems.

To learn more about this outstanding device, inquire about its capabilities, or place an order for the MP3302DJ-LF-Z and other electronic components, please contact ICRFQ, a leading electronic component distributor in China.

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Kevin Chen