My Inquiry
My Account
Monolithic Power Systems Inc. MP3302DJ-LF-P
- Part No.:
- MP3302DJ-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MP3302DJ-LF-P.pdf
- Description:
- IC LED DRV RGLTR SGL WR TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,375
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP3302DJ-LF-P from Monolithic Power Systems is a single-cell step-up white LED driver IC with integrated 1.3A MOSFET, fixed 1.3MHz switching frequency, 200mV feedback reference, and single-wire analog/PWM dimming control. It regulates up to 10 series white LEDs from 2.5–6V input, delivering stable current in handheld LCD backlighting applications.
For engineers reviewing the MP3302DJ-LF-P datasheet, MP3302DJ-LF-P pinout, MP3302DJ-LF-P application, or MP3302DJ-LF-P equivalent, key selection criteria include open-load shutdown at 42V, internal thermal shutdown at 150°C, UVLO thresholds (2.45V rising), and TSOT23-5 package compatibility with space-constrained portable designs.
Technical Context
The MP3302DJ-LF-P implements constant-frequency peak-current-mode boost regulation with an internal 0.5Ω power switch and 200mV precision feedback reference. Its error amplifier compares FB voltage against this reference to adjust PWM duty cycle, maintaining LED current accuracy across input and temperature variations.
Single-wire dimming operates via EN pin: DC voltages between 0.7V–1.4V linearly scale regulated FB voltage from 0–200mV for analog dimming; 200Hz–1kHz square waves enable PWM dimming. Open-circuit protection triggers shutdown when SW exceeds 42V, preventing overvoltage damage to LED strings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports single Li-ion battery operation without external LDO pre-regulation. |
| Switching Frequency | 1.3MHz (typ) - enables use of small 4.7µH inductors and 0.47µF output capacitors for compact PCB layout. |
| Feedback Reference | 200mV (typ) - reduces I²R loss in current-sense resistor, improving efficiency at high LED currents. |
| Current Limit | 1.33A (typ) - sets maximum switch conduction capability, limiting peak inductor current during startup or overload. |
| UVLO Threshold | 2.45V (rising) - prevents erratic operation during battery discharge below functional voltage. |
| Open-Load Shutdown | 42V (typ) - disables switching if LED string opens, protecting output components from overvoltage stress. |
| Thermal Shutdown | 150°C (typ) - halts operation to prevent permanent junction damage under sustained overload or poor heatsinking. |
Pinout & Package
MP3302DJ-LF-P is housed in a 5-pin TSOT23 package with exposed pad connected to GND for thermal management. Pin 3 (NC) is not internally connected and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Power Switch Drain | Drives external inductor; swings from GND to up to 36V; requires low-inductance routing to minimize EMI. |
| 2 (GND) | Ground Reference | Main signal and power ground; exposed pad must be soldered to PCB GND plane for thermal performance. |
| 3 (NC) | No Connect | Unbonded die pad; must be left floating-no trace or copper connection permitted. |
| 4 (EN) | Enable & Dimming Input | DC voltage 0.7–1.4V enables analog dimming; >1.5V PWM toggles full on/off; <0.4V disables device. |
| 5 (IN) | Input Supply | Connects to 2.5–6V source; requires local 10µF ceramic bypass capacitor near pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.3A MOSFET | Eliminates need for external high-side switch, reducing BOM count and board area in portable backlight designs. |
| Single-Wire Dimming | EN pin supports both analog (0.7–1.4V DC) and PWM (200Hz–1kHz) dimming without additional control lines. |
| 200mV Feedback Reference | Enables use of low-value, high-precision sense resistors (e.g., 1.11Ω for 180mA), minimizing power loss and heat. |
| Open-Load Protection | Shuts down SW output when VSW > 42V, preventing destructive overvoltage during LED string failure. |
| Thermal + UVLO + Current Limit | Three independent protection circuits ensure robust operation across battery voltage sag, ambient temperature rise, and shorted loads. |
Applications
| Handheld LCD Backlighting | Digital Still Camera Display |
|---|---|
|
Use Scenario: Driving 9 parallel strings of 3-series white LEDs in a 5" LCD panel powered by a single Li-ion cell (3.3–6V). IC Role / Device Role / Timing Role: Step-up DC/DC converter regulating constant LED current via FB pin; EN pin provides brightness control synchronized to system UI commands. Use Value: Delivers 180mA total LED current with 87% efficiency at 5V input, enabling >5-hour battery life in PDA-class devices. |
Use Scenario: Backlighting a 3.5" OLED viewfinder in a digital still camera with variable ambient light conditions. IC Role / Device Role / Timing Role: Constant-current LED driver with fast-response analog dimming (EN pin) to match real-time exposure settings and battery state. Use Value: 1.3MHz switching avoids audible noise in audio-sensitive imaging environments while supporting rapid brightness transitions. |
| Small Industrial HMI Display | Portable Medical Device Indicator |
|
Use Scenario: Illuminating segmented backlight zones on a ruggedized 7" industrial human-machine interface with wide-temperature operation. IC Role / Device Role / Timing Role: Primary LED current regulator with UVLO (2.45V) and thermal shutdown (150°C) ensuring reliable operation from –40°C to +85°C ambient. Use Value: TSOT23-5 footprint allows integration into dense control panels; open-load shutdown prevents fault propagation during field LED failures. |
Use Scenario: Providing status illumination in a battery-powered portable ECG monitor requiring low EMI and predictable dimming behavior. IC Role / Device Role / Timing Role: Low-noise LED driver with soft-start and RC-filterable EN input to reject system-level digital noise affecting clinical readings. Use Value: 200mV FB reference minimizes sense resistor self-heating, preserving current accuracy critical for consistent visual signaling. |
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 |
|---|---|---|---|
| RT9397BZSP | Fixed 1.2MHz frequency; 1.2A switch; 200mV FB; no integrated soft-start. | Lacks internal soft-start and open-load shutdown; requires external circuitry for safe startup and fault handling. | Prefer MP3302DJ-LF-P where robust fault protection and simplified design are required. |
| TPS61165DRVR | 1.2MHz switching; 1.2A switch; 200mV FB; integrated PWM-to-analog converter. | Requires external PWM generator; lacks native analog dimming via EN pin voltage scaling. | Choose MP3302DJ-LF-P for direct analog dimming control without added ICs or firmware overhead. |
Compared with RT9397BZSP and TPS61165DRVR, MP3302DJ-LF-P uniquely integrates single-wire analog dimming, open-load shutdown, and thermal/UVLO/current protections in a TSOT23-5 package-reducing component count and validation effort for portable LED backlight systems.
Availability
MP3302DJ-LF-P is available at Aetrix Electronics and suitable for handheld computers, digital still cameras, and small LCD displays requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MP3302DJ-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, motion control, and automotive applications.
The MP3302 belongs to MPS's white LED driver product line, engineered specifically for space-constrained, battery-powered LCD/OLED backlighting with emphasis on efficiency, protection integrity, and dimming flexibility.
FAQ
What is the maximum number of white LEDs the MP3302DJ-LF-P can drive in series?
The MP3302DJ-LF-P supports up to 10 white LEDs in series, assuming typical forward voltage of 3.2V per LED (32V total), staying within its 40V absolute maximum SW pin rating and 42V open-load shutdown threshold. At higher LED counts, output voltage approaches protection limits, reducing design margin.
Can the MP3302DJ-LF-P operate from a 3.3V input with full 180mA LED current?
Yes. The datasheet confirms operation at 3.3V input driving 9 strings of 3 WLEDs at 180mA total current. Efficiency remains above 75% at this condition, and the 2.45V UVLO ensures stable startup even as the Li-ion cell discharges toward 3.3V.
How does the EN pin function for analog dimming versus PWM dimming?
For analog dimming, apply a stable DC voltage between 0.7V and 1.4V to EN: 0.7V yields ~0% LED current, 1.4V yields 100%. For PWM dimming, apply a 200Hz–1kHz square wave ≥1.5V amplitude; duty cycle directly controls average LED brightness without altering current regulation setpoint.
Is an external Schottky diode required, and what specifications are recommended?
Yes-an external Schottky diode is mandatory in the boost topology. MPS recommends B0540 (40V, 500mA) or equivalent: low forward voltage (<0.4V) minimizes conduction loss, and fast recovery prevents reverse recovery spikes that degrade efficiency and EMI performance.
What is the purpose of the NC pin (Pin 3) in the TSOT23-5 package?
Pin 3 is a no-connect terminal-unbonded at the die level. It must remain electrically isolated: no trace, no copper pour, and no solder mask opening. Connecting it risks internal shorting or unpredictable latch-up behavior due to proximity to sensitive analog nodes.
Does the MP3302DJ-LF-P require an external current-sense resistor, and how is its value calculated?
Yes. The LED current is set by RSENSE = 0.2V / ILED. For example, 180mA requires 1.11Ω (1% tolerance). The resistor connects between LED string cathode and GND, with FB tied to the cathode node-ensuring accurate current regulation independent of LED VF variation.
MP3302DJ-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 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)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MP3302DJ-LF-P FAQ
1.How can I place an order for MP3302DJ-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3302DJ-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 MP3302DJ-LF-P reliable?
The price and inventory of MP3302DJ-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 MP3302DJ-LF-P is usually 5 days.
3.What payment methods are accepted for MP3302DJ-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3302DJ-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3302DJ-LF-P?
MP3302DJ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3302DJ-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 MP3302DJ-LF-P?
For technical support, including MP3302DJ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3302DJ-LF-P requirements.
6.How does Aetrix verify that MP3302DJ-LF-P is sourced from the original manufacturer or authorized distributors?
All MP3302DJ-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 MP3302DJ-LF-P meets industry standards.
7.What is the process for return or replacement of MP3302DJ-LF-P?
All MP3302DJ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP3302DJ-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 MP3302DJ-LF-P part is unused and in its original packaging.
Return procedure for MP3302DJ-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP3302DJ-LF-P Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
