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Monolithic Power Systems Inc. MP1541DJ-LF-Z
- Part No.:
- MP1541DJ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MP1541DJ-LF-Z.pdf
- Description:
- IC REG BOOST ADJ 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,245
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Product details
Overview
MP1541DJ-LF-Z from Monolithic Power Systems is a fixed-frequency current-mode boost converter IC with integrated 0.65Ω MOSFET, operating at 1.3MHz to enable compact 2mm-height inductors and ceramic capacitors. It delivers up to 300mA at 12V from a 5V input, supports 2.5V–6V input and 3V–22V output ranges, and includes UVLO, thermal shutdown, and internal soft-start for battery-sensitive applications like camera flash.
For engineers reviewing the MP1541DJ-LF-Z datasheet, MP1541DJ-LF-Z pinout, MP1541DJ-LF-Z application, or MP1541DJ-LF-Z equivalent, key selection criteria include its TSOT23-5 package footprint, 1.25V feedback reference, 1.9A current limit, and compatibility with Schottky diode rectification in space-constrained DC-DC designs.
Technical Context
The MP1541DJ-LF-Z implements peak-current-mode control with a fixed 1.3MHz oscillator and internal ramp compensation to suppress subharmonic oscillation above 50% duty cycle. Its error amplifier compares FB voltage against a 1.25V bandgap reference and drives PWM logic via a stabilizing ramp-summed current sense signal.
It integrates a 0.65Ω N-channel MOSFET switch, uses internal soft-start (120µs ramp), and features EN-controlled startup with 1.3V typical enable threshold and 100mV hysteresis. Protection includes undervoltage lockout (2.45V trip), thermal shutdown (160°C), and cycle-by-cycle current limiting (1.9A typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.3MHz fixed - enables use of miniature 2mm-height inductors and low-ESR ceramic capacitors |
| Input Voltage Range | 2.5V to 6V - supports single-cell Li-ion (3.0–4.2V) and 3.3V/5V rail inputs |
| Output Voltage Range | 3V to 22V - programmable via resistor divider; 12V @ 300mA achievable from 5V input |
| Feedback Reference | 1.25V ±4% - sets output via external resistive divider; stable over –40°C to +85°C |
| Current Limit | 1.9A typical - protects internal MOSFET during overload or short-circuit conditions |
| Quiescent Current | 635–850µA - minimizes standby power draw in battery-powered systems |
| Thermal Shutdown | 160°C junction - self-protects under sustained overload; recovers after cooldown |
Pinout & Package
MP1541DJ-LF-Z is housed in a 5-pin TSOT23-5 package (2.9mm × 1.6mm × 0.9mm), optimized for high-density PCB layouts and thermal performance in portable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Power Switch Drain | Connects to inductor and Schottky diode anode; swings from GND to up to 22V |
| 2 GND | Ground Reference | Primary return path for power and control circuits; must be low-impedance |
| 3 FB | Feedback Input | Senses output voltage via resistor divider; regulates to 1.25V reference |
| 4 EN | Enable Control | Active-high logic input; 1.3V typical threshold; must not float |
| 5 IN | Input Supply | Accepts 2.5–6V; requires local 4.7µF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.65Ω MOSFET | Eliminates external high-side switch; reduces BOM count and layout area |
| 1.3MHz fixed frequency | Enables <2mm-height magnetics and small ceramic caps; improves transient response |
| Internal soft-start (120µs) | Limits inrush current at startup; prevents input rail droop and extends battery life |
| 1.25V precision feedback | Supports accurate output regulation across temperature; simplifies divider design |
| UVLO + thermal + current protection | Ensures robust operation under brownout, overtemperature, or overload without external circuitry |
Applications
| Camera Phone Flash | Handheld Computers & PDAs |
|---|---|
Use Scenario: Driving white LEDs for high-intensity flash in smartphone rear cameras. IC Role / Device Role / Timing Role: Boost converter generating 12V from 3.7V battery to deliver 100mA flash current. Use Value: Internal soft-start prevents battery sag during flash activation; 1.3MHz switching avoids audible noise in audio-sensitive modules. | Use Scenario: Powering 3.3V or 5V peripherals (e.g., SD card, USB PHY) from a single Li-ion cell. IC Role / Device Role / Timing Role: Step-up regulator supplying regulated 5V rail from 2.5–4.2V battery input. Use Value: TSOT23-5 footprint saves board space; 635µA quiescent current preserves runtime in sleep mode. |
| Digital Still Cameras | Small LCD Displays |
Use Scenario: Providing bias voltage for CCD/CMOS image sensor analog front-end and flash charging. IC Role / Device Role / Timing Role: High-efficiency boost stage delivering 12V/300mA with fast load-step response. Use Value: 1.9A current limit handles pulsed loads; thermal shutdown prevents damage during extended burst capture. | Use Scenario: Generating 12–15V backlight supply for monochrome or color STN/TFT LCD panels. IC Role / Device Role / Timing Role: Compact DC-DC source replacing discrete charge-pump solutions. Use Value: Fixed 1.3MHz frequency ensures predictable EMI profile; internal compensation reduces external component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61040DRVR | 500kHz switching frequency; 0.5A switch current; 1.23V feedback reference | Lower frequency requires larger inductors; better suited for lower-noise, lower-power applications | Select when EMI filtering is prioritized over size, and load current ≤200mA |
| RT8532GJ6 | 1.2MHz switching; 2.5A current limit; 0.6V feedback reference; requires external compensation | Higher current capability but needs external loop components; less integrated than MP1541 | Select when >300mA continuous output or adjustable soft-start timing is required |
Compared with TPS61040DRVR and RT8532GJ6, the MP1541DJ-LF-Z offers superior integration (internal compensation, soft-start, 1.25V reference) and smallest footprint (TSOT23-5), making it optimal for ultra-compact, battery-powered boost applications where size and simplicity are critical.
Availability
MP1541DJ-LF-Z is available at Aetrix Electronics and suitable for camera flash modules, handheld computing peripherals, and small LCD display power supplies requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MP1541DJ-LF-Z 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 expertise in DC-DC conversion, LED drivers, and motor control.
The MP1541 belongs to MPS's low-power boost converter product line, designed specifically for space-constrained, battery-operated consumer electronics requiring high efficiency, minimal external components, and reliable protection.
FAQ
What is the maximum output voltage supported by the MP1541DJ-LF-Z?
The MP1541DJ-LF-Z supports output voltages up to 22V, set by the external resistor divider on the FB pin. The internal 1.25V reference and current-limit architecture allow stable regulation across this range when paired with appropriate Schottky diode and output capacitor ratings.
Can the MP1541DJ-LF-Z operate from a single Li-ion cell?
Yes - the MP1541DJ-LF-Z operates from 2.5V to 6V input, covering the full discharge range of a single Li-ion cell (2.7V–4.2V). Its 1.3MHz switching and internal MOSFET ensure high efficiency (>85% at 300mA/12V from 3.7V) without external gate drivers.
Is external compensation required for stable operation?
No - the MP1541DJ-LF-Z is internally compensated. A single 47kΩ–100kΩ resistor in series with the FB node is recommended for most applications; no external capacitor or complex network is needed to achieve stable regulation.
What package type does MP1541DJ-LF-Z use?
The MP1541DJ-LF-Z uses the TSOT23-5 package (2.9mm × 1.6mm × 0.9mm), with pins arranged as SW-GND-FB-EN-IN. This ultra-small outline supports high-density layouts and meets JEDEC MO-193AA mechanical standards.
Does the MP1541DJ-LF-Z include thermal protection?
Yes - it incorporates a thermal shutdown circuit that disables the internal MOSFET when junction temperature reaches 160°C. Operation resumes automatically after die temperature falls below the hysteresis threshold, preventing permanent damage during sustained overload.
How is the enable function implemented on the EN pin?
The EN pin is a logic-level input with 1.3V typical turn-on threshold and 100mV hysteresis. It must be pulled high (≥1.6V) to activate regulation or tied to VIN for automatic startup. Floating the EN pin is prohibited and may cause erratic behavior.
What diode is recommended for use with MP1541DJ-LF-Z in a 12V/300mA application?
For 12V output at 300mA, the MBR0520 Schottky diode is recommended per the datasheet. Its 20V reverse rating, low forward voltage (~0.35V), and fast recovery minimize conduction loss and improve efficiency over standard PN diodes.
MP1541DJ-LF-Z 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
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- 22V
- Current - Output:
- 300mA
- Frequency - Switching:
- 1.3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MP1541DJ-LF-Z FAQ
1.How can I place an order for MP1541DJ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1541DJ-LF-Z 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 MP1541DJ-LF-Z reliable?
The price and inventory of MP1541DJ-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1541DJ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP1541DJ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1541DJ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1541DJ-LF-Z?
MP1541DJ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1541DJ-LF-Z 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 MP1541DJ-LF-Z?
For technical support, including MP1541DJ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1541DJ-LF-Z requirements.
6.How does Aetrix verify that MP1541DJ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP1541DJ-LF-Z 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 MP1541DJ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP1541DJ-LF-Z?
All MP1541DJ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP1541DJ-LF-Z, 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 MP1541DJ-LF-Z part is unused and in its original packaging.
Return procedure for MP1541DJ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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