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Monolithic Power Systems Inc. MP3412EJ-LF-P
- Part No.:
- MP3412EJ-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MP3412EJ-LF-P.pdf
- Description:
- IC LED DRVR RGLTR PWM TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,395
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Product details
Overview
MP3412EJ-LF-P from Monolithic Power Systems is a synchronous boost white LED driver IC with true output disconnect, 1.1A switch current limit, 1MHz fixed switching frequency, and 0.8V minimum startup voltage. It operates from 0.8V–4.4V input, regulates LED current via 200mV feedback reference, and delivers up to 5.0V output in a TSOT23-6 package for space-constrained portable lighting.
For engineers reviewing the MP3412EJ-LF-P datasheet, MP3412EJ-LF-P pinout, MP3412EJ-LF-P application, or MP3412EJ-LF-P equivalent, key selection criteria include low-voltage start-up capability, integrated synchronous rectification, output disconnect behavior during shutdown, and inrush current limiting for battery-powered WLED systems.
Technical Context
The MP3412EJ-LF-P implements current-mode PWM control with internal compensation and a dedicated 250kHz start-up oscillator that enables operation below 1V input. Its error amplifier uses a 200mV reference and 33µS transconductance to regulate LED current through RSENSE.
It integrates dual MOSFETs (336mΩ NMOS switch, 405mΩ PMOS synchronous rectifier), thermal regulation active above 125°C, and open-load/short-circuit protection triggered at SW >5.1V or via soft-start capacitor discharge. Output disconnect eliminates body diode conduction, ensuring VOUT fully discharges to 0V in shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.8V to 4.4V - supports single-cell alkaline, NiMH, or LiFePO₄ batteries without pre-regulation. |
| Output Voltage Range | 2.5V to 5.0V - sufficient to drive 1–2 series white LEDs (3.0–3.6V each) with margin. |
| Switching Frequency | 1.0MHz ±10% - enables use of ≤10µH inductors and small ceramic capacitors for minimal PCB area. |
| Feedback Reference | 200mV ±5mV - sets LED current as ILED = 0.2V / RSENSE; enables precise dimming control. |
| Shutdown Current | <1µA - preserves battery life in standby mode for handheld and portable devices. |
| Efficiency | Up to 96% - achieved via synchronous rectification and low RDS(ON) switches, reducing thermal load. |
| Thermal Shutdown | 150°C - protects die under overload; recovery occurs after junction temperature falls below threshold. |
Pinout & Package
MP3412EJ-LF-P is housed in a 6-pin TSOT23-6 package (0.95mm pitch, 1.00mm max height), optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Power Switch Node | Connection point between internal NMOS and synchronous PMOS; ties directly to inductor; carries high-frequency pulsed current. |
| 2 GND | Power & Signal Ground | Common return path for switch current, control circuitry, and feedback loop; must be low-inductance connection. |
| 3 FB | Current Sense Feedback Input | Monitors voltage across RSENSE; compares to 200mV reference to regulate LED current; requires short trace to minimize noise. |
| 4 EN | Enable Control Input | Logic-level enable (0.4V low / 0.62V high thresholds); supports PWM dimming when driven with ≥200Hz square wave. |
| 5 OUT | Boost Output / Rectifier Drain | Drain of internal PMOS rectifier; connects to LED anode; fully disconnected from IN during shutdown via true load disconnect. |
| 6 IN | Battery Input Supply | Primary power input (0.8–4.4V); must be locally bypassed with ≥4.7µF ceramic capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| True Output Load Disconnect | Eliminates PMOS body diode conduction during shutdown, ensuring VOUT drops fully to 0V and preventing residual LED glow. |
| Inrush Current Limiting & Soft-Start | Internal 200µs soft-start ramps peak inductor current from 300mA to 1.1A, limiting surge on battery supply at turn-on. |
| Open-Load & Short-Circuit Protection | Detects SW node overvoltage (>5.1V) for open LED fault; limits current and activates thermal regulation during sustained short. |
| Low-Voltage Start-Up | Dedicated 250kHz start-up oscillator enables reliable operation from 0.8V input-critical for aging or cold-temperature batteries. |
| Integrated Synchronous Rectification | 405mΩ PMOS rectifier replaces external Schottky diode, improving efficiency by ~8% and eliminating reverse leakage path. |
Applications
| Cellular Phones | Digital Cameras |
|---|---|
|
Use Scenario: Backlighting for small OLED or TFT displays in ultra-thin smartphones with single-cell battery supply. IC Role / Device Role / Timing Role: Boost converter and current regulator driving 1–2 series WLEDs; provides stable current despite VIN sag during RF transmission bursts. Use Value: True output disconnect prevents display ghosting during sleep mode; 0.8V start-up extends usable battery range down to end-of-discharge. |
Use Scenario: Flash illumination for compact digital cameras using lithium-ion or AA alkaline cells. IC Role / Device Role / Timing Role: High-efficiency current source delivering 200mA to white LED flash array; synchronized dimming via EN pin PWM. Use Value: 1MHz switching allows <10µH inductor and 2.2µF ceramic output cap-reducing solution size by >40% vs. 500kHz alternatives. |
| Handheld Instruments | GPS Receivers |
|
Use Scenario: Status and backlight illumination in ruggedized test meters and field diagnostic tools operating across wide temperature ranges. IC Role / Device Role / Timing Role: LED driver with thermal regulation (active above 125°C) and shutdown at 150°C to sustain reliability in enclosed enclosures. Use Value: Open-load protection disables output if LED fails open, preventing uncontrolled voltage rise and system damage. |
Use Scenario: Indicator and map backlighting in battery-powered GPS units requiring long runtime and cold-weather operation. IC Role / Device Role / Timing Role: Low-quiescent-current (380–600µA) boost controller enabling >100-hour standby with LED indicators active. Use Value: Sub-1µA shutdown current minimizes battery drain during extended GPS-off periods; 0.8V start-up ensures function at -20°C with NiMH cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar WLED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT9701GSP | Lacks true output disconnect; uses external Schottky diode; 600kHz switching; 1.2A switch limit. | No VOUT discharge in shutdown; higher board area due to diode + larger inductor; lower efficiency at light loads. | Choose when cost sensitivity outweighs need for zero-VOUT shutdown or ultra-compact layout. |
| TPS61061DRVR | Fixed 1.2MHz frequency; 400mA switch current; no open-load protection; 1.8V min start-up. | Cannot drive >1 WLED at full brightness; unsuitable for sub-1V battery operation or open-circuit fault detection. | Prefer only for low-current indicator LEDs where thermal headroom and fault coverage are secondary. |
Compared with RT9701GSP and TPS61061DRVR, MP3412EJ-LF-P uniquely combines sub-1V start-up, true output disconnect, open-load protection, and 1.1A capability in a 6-pin TSOT23-making it optimal for robust, miniaturized WLED systems demanding battery longevity and fault resilience.
Availability
MP3412EJ-LF-P is available at Aetrix Electronics and suitable for cellular phone backlighting, digital camera flash circuits, handheld instrument indicators, and GPS receiver displays requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for MP3412EJ-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 emphasis on efficiency, integration, and thermal robustness.
The MP3412 belongs to MPS's WLED boost driver product line, engineered specifically for portable battery-powered lighting where ultra-low start-up voltage, output safety, and minimal footprint are critical design constraints.
FAQ
What is the minimum input voltage required for MP3412EJ-LF-P to start switching?
The MP3412EJ-LF-P starts switching at 0.8V typical (0.62V min, 0.82V max) due to its dedicated low-voltage start-up oscillator. This allows operation from nearly depleted single-cell alkaline or NiMH batteries, extending device runtime beyond conventional 1.0V–1.2V start thresholds.
How does the true output disconnect feature work during shutdown?
During shutdown (EN = low), the internal PMOS synchronous rectifier is actively disabled to block body diode conduction. This isolates OUT from IN and allows the output capacitor to fully discharge to 0V-eliminating residual LED glow and preventing unintended current paths in multi-rail systems.
Can MP3412EJ-LF-P drive more than one white LED in series?
Yes-it supports up to two standard white LEDs (3.0–3.6V each) in series, as its 2.5–5.0V output range and 1.1A switch current accommodate forward voltages up to ~7.2V with appropriate inductor sizing and thermal derating. Driving three or more LEDs exceeds its 5.0V VOUT limit.
What is the recommended RSENSE value for 200mA LED current?
Using ILED = 0.2V / RSENSE, a 1.0Ω resistor sets nominal 200mA current. The datasheet confirms this value yields stable regulation at 25°C; tolerance and temperature coefficient of the resistor directly impact current accuracy and thermal drift.
Does MP3412EJ-LF-P require external compensation components?
No-its current-mode PWM controller includes internal compensation, eliminating the need for external RC networks on the FB pin. This reduces BOM count and layout sensitivity while maintaining loop stability across input/output voltage and load variations.
How does the device respond to an open LED fault?
When the LED opens, FB remains at 0V, forcing maximum duty cycle. Once SW node voltage exceeds 5.1V, the device shuts down and holds off until power is cycled-preventing destructive overvoltage on downstream components and ensuring system-level safety.
Is MP3412EJ-LF-P RoHS compliant and halogen free?
Yes-MP3412EJ-LF-P carries the "-LF" suffix indicating lead-free, halogen-free construction and full compliance with EU RoHS Directive 2011/65/EU. All packaging materials meet MPS's green policy standards per their Quality Assurance documentation.
MP3412EJ-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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):
- 0.8V
- Voltage - Supply (Max):
- 4.4V
- Voltage - Output:
- 2.5V ~ 5V
- Current - Output / Channel:
- 1.1A (Switch)
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -20°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
MP3412EJ-LF-P FAQ
1.How can I place an order for MP3412EJ-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3412EJ-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 MP3412EJ-LF-P reliable?
The price and inventory of MP3412EJ-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 MP3412EJ-LF-P is usually 5 days.
3.What payment methods are accepted for MP3412EJ-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3412EJ-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3412EJ-LF-P?
MP3412EJ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3412EJ-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 MP3412EJ-LF-P?
For technical support, including MP3412EJ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3412EJ-LF-P requirements.
6.How does Aetrix verify that MP3412EJ-LF-P is sourced from the original manufacturer or authorized distributors?
All MP3412EJ-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 MP3412EJ-LF-P meets industry standards.
7.What is the process for return or replacement of MP3412EJ-LF-P?
All MP3412EJ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP3412EJ-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 MP3412EJ-LF-P part is unused and in its original packaging.
Return procedure for MP3412EJ-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP3412EJ-LF-P Tags
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