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Monolithic Power Systems Inc. MP6401DJ-25BD3-LF-Z
- Part No.:
- MP6401DJ-25BD3-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MP6401DJ-25BD3-LF-Z.pdf
- Description:
- IC REG LIN 2.5V 300MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,768
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Product details
Overview
MP6401DJ-25BD3-LF-Z from Monolithic Power Systems is a 300mA low-dropout linear regulator with integrated push-pull active-low reset circuit, delivering ±2% output voltage accuracy at 2.5V fixed output, operating from 2.5V–5.5V input, and featuring -12.5% reset threshold with 200ms delay. It targets space-constrained portable electronics requiring simultaneous power regulation and microprocessor supervision, such as smart phones and GPS receivers.
For engineers reviewing the MP6401DJ-25BD3-LF-Z datasheet, MP6401DJ-25BD3-LF-Z pinout, MP6401DJ-25BD3-LF-Z application, or MP6401DJ-25BD3-LF-Z equivalent, key selection criteria include dropout voltage under load, reset timing precision, quiescent current in battery-powered operation, and TSOT23-6 package thermal performance.
Technical Context
The device integrates an LDO regulator core with a dedicated reset comparator monitoring VOUT against a factory-trimmed -12.5% threshold, triggering a push-pull RESET assertion within 30μs of undervoltage detection. Its ADJ pin enables either fixed-output mode (ADJ = GND) or adjustable mode (ADJ = resistor divider), supporting 1.229V–5V outputs.
Thermal shutdown activates at 150°C with 20°C hysteresis, while reverse-current protection blocks OUT-to-IN leakage below 1μA when VIN < VOUT. The EN pin provides active-high enable control, and internal current limiting caps output at 500mA during overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2% - ensures stable supply for 2.5V logic rails without external feedback components. |
| Max Load Current | 300mA - sufficient to power baseband processors, RF transceivers, or sensor subsystems in handheld devices. |
| Dropout Voltage | 114mV at 300mA - enables regulation down to 2.5V output from 2.614V input, critical for single-cell Li-ion or Li-poly systems. |
| Quiescent Current | 80μA - minimizes standby drain in always-on subsystems like real-time clocks or backup memory controllers. |
| Reset Threshold | -12.5% of VOUT - asserts RESET when output falls to 2.1875V, providing robust brownout detection for 2.5V microcontrollers. |
| Reset Delay | 200ms typical - prevents spurious resets during brief input transients while allowing fast system recovery after stable power restoration. |
| Noise (10Hz–100kHz) | 15μVRMS - supports noise-sensitive analog circuits like ADC references or RF synthesizers without additional filtering. |
Pinout & Package
MP6401DJ-25BD3-LF-Z uses the TSOT23-6 package (1.00mm max height, 2.80mm × 2.60mm footprint), optimized for high-density portable PCB layouts and offering θJA = 220°C/W on standard FR-4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply connection | Accepts 2.5V–5.5V unregulated input; must be decoupled with ≥1μF ceramic capacitor near pin. |
| 2 (GND) | Power ground reference | Common return path for regulator and reset circuitry; requires low-impedance connection to PCB ground plane. |
| 3 (EN) | Enable control input | Active-high logic input; tie directly to IN for always-on operation; floating prohibited to avoid undefined state. |
| 4 (RESET) | Push-pull active-low reset output | Drives microcontroller RESET pin directly; sinks 3.2mA at 0.4V, sources 500μA at 0.8×VOUT when deasserted. |
| 5 (ADJ) | Mode select / feedback node | Connected to GND for 2.5V fixed output; connected to resistor divider tap for adjustable output configuration. |
| 6 (OUT) | Regulated output | Delivers up to 300mA at 2.5V ±2%; requires ≥3.3μF X7R/X5R ceramic capacitor with ESR < 100mΩ. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reset function | Eliminates need for discrete supervisor IC, reducing BOM count and board area by ~25% in compact mobile designs. |
| Ultra-low noise output | 15μVRMS enables direct powering of precision analog blocks without post-regulation LC filtering. |
| Reverse current blocking | Prevents backfeed from backup battery or powered output into main supply rail, protecting upstream sources. |
| Thermal and short-circuit protection | Self-limiting behavior ensures safe operation during sustained overload or poor heatsinking conditions. |
| Four selectable reset delays | 200ms option balances immunity to line ripple with fast system restart capability after clean power-up. |
Applications
| Smartphone Baseband Power | Portable GPS Receiver |
|---|---|
|
Use Scenario: Regulating main 2.5V supply for cellular baseband processor and associated peripherals during dynamic load changes. IC Role / Device Role / Timing Role: Primary LDO with integrated reset supervision, ensuring processor reset occurs only when regulated voltage falls below 2.1875V for ≥200ms. Use Value: Prevents processor lockup during battery sag or transient load spikes while eliminating external reset IC and its associated layout complexity. |
Use Scenario: Providing clean, stable 2.5V rail to GPS RF front-end and baseband IC in handheld navigation units. IC Role / Device Role / Timing Role: Low-noise LDO with precise reset timing, maintaining signal integrity in GNSS receiver chains sensitive to supply ripple. Use Value: 15μVRMS noise floor avoids degradation of GPS C/N₀ ratio; 200ms reset delay rejects brief antenna coupling transients. |
| Wireless Audio Transmitter | PDA Application Processor |
|
Use Scenario: Powering Bluetooth LE audio codec and RF section in battery-operated earbuds or speaker modules. IC Role / Device Role / Timing Role: Compact LDO with ultra-low IQ (80μA), enabling >100-hour standby time while asserting RESET before brownout-induced data corruption. Use Value: Extends battery life in always-listening modes; push-pull RESET drives MCU wake-up logic without pull-up resistor. |
Use Scenario: Supplying 2.5V I/O voltage to PDA application processor and NAND flash interface during active and sleep states. IC Role / Device Role / Timing Role: Fixed-output LDO with thermal shutdown and reverse leakage protection, safeguarding memory contents during hot-swap battery replacement. Use Value: Reverse-current blocking preserves RAM data when main battery is removed and backup cap sustains VOUT above 2.1875V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79925DBVR | 200mA max output, no integrated reset, 170mV dropout at 200mA, 65μA IQ | Requires external reset IC (e.g., TPS3808G01) for supervision, increasing component count and board area | Select when lower quiescent current is prioritized over integrated reset and higher load capability is unnecessary |
| MCP1826-2502E/DB | 500mA max output, no reset function, ±1% accuracy, 250mV dropout at 500mA, 120μA IQ | Lacks reset circuit entirely; suitable only where host MCU implements software-based brownout detection | Choose when higher current delivery is required and reset functionality is handled elsewhere in system firmware or hardware |
Compared with MP6401DJ-25BD3-LF-Z, TPS79925DBVR trades integrated reset and 300mA capacity for lower IQ and tighter accuracy, while MCP1826-2502E/DB offers greater current headroom but requires full external supervision design effort.
Availability
MP6401DJ-25BD3-LF-Z is available at Aetrix Electronics and suitable for smartphone baseband power, portable GPS receivers, wireless audio transmitters, and PDA application processors requiring stable component supply across production lifecycles.
Supply support for MP6401DJ-25BD3-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 mixed-signal ICs for power management, motion control, and automotive applications.
The MP6401 product line delivers integrated LDO + reset solutions targeting space- and power-constrained portable electronics, emphasizing minimal external components, low noise, and reliable system-level supervision.
FAQ
What is the function of the ADJ pin on MP6401DJ-25BD3-LF-Z?
The ADJ pin selects between fixed and adjustable output modes. When tied to GND, it configures the device for 2.5V fixed output. When connected to a resistor divider between OUT and GND, it enables adjustable output from 1.229V to 5V. In fixed mode, ADJ-to-GND impedance must remain below 50kΩ.
Can MP6401DJ-25BD3-LF-Z operate with input voltage below 2.5V?
No. The absolute minimum input voltage is 2.5V per the Recommended Operating Conditions table. Input voltage below 2.5V triggers undervoltage lockout (VUVLO = 1.85–2.2V), disabling regulation and asserting RESET. Operation below 2.5V is not supported.
How does the reset delay time get selected for this part number?
The "D3" suffix in MP6401DJ-25BD3-LF-Z specifies the 200ms reset delay option. This is factory-programmed and non-configurable externally. Other delay options (3.125ms, 25ms, 1580ms) require different part numbers (D1, D2, D4).
What is the maximum allowable power dissipation in TSOT23-6 package at +60°C ambient?
Using θJA = 220°C/W and TJ(MAX) = 150°C, maximum continuous power dissipation is (150 − 60)/220 = 0.409W. At 300mA load and 2.5V output from 5V input, power dissipation is (5 − 2.5) × 0.3 = 0.75W - exceeding safe limit; derating or improved PCB copper is required.
Does MP6401DJ-25BD3-LF-Z support backup battery operation?
Yes. Its reverse-current protection blocks OUT-to-IN leakage (<1μA), allowing a backup battery or supercapacitor connected to OUT to sustain logic during main supply removal. RESET asserts immediately upon main input loss, enabling controlled save-and-hibernate sequences.
Is an external capacitor required on the RESET pin?
No. The RESET pin is a push-pull output and does not require external capacitance. However, a 100kΩ pull-up resistor may be added if interfacing with open-drain inputs, though the internal driver is capable of directly driving standard CMOS RESET inputs.
What is the minimum output capacitor value and type recommended?
A minimum 3.3μF X7R or X5R ceramic capacitor is required on the OUT pin. Larger values (e.g., 10μF) improve transient response and PSRR. ESR must be below 100mΩ; tantalum or aluminum electrolytics are not recommended due to ESR and stability risks.
MP6401DJ-25BD3-LF-Z 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
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.22V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 155 µA
- Current - Supply (Max):
- -
- PSRR:
- 57dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
MP6401DJ-25BD3-LF-Z FAQ
1.How can I place an order for MP6401DJ-25BD3-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6401DJ-25BD3-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 MP6401DJ-25BD3-LF-Z reliable?
The price and inventory of MP6401DJ-25BD3-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 MP6401DJ-25BD3-LF-Z is usually 5 days.
3.What payment methods are accepted for MP6401DJ-25BD3-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6401DJ-25BD3-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6401DJ-25BD3-LF-Z?
MP6401DJ-25BD3-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6401DJ-25BD3-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 MP6401DJ-25BD3-LF-Z?
For technical support, including MP6401DJ-25BD3-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6401DJ-25BD3-LF-Z requirements.
6.How does Aetrix verify that MP6401DJ-25BD3-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP6401DJ-25BD3-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 MP6401DJ-25BD3-LF-Z meets industry standards.
7.What is the process for return or replacement of MP6401DJ-25BD3-LF-Z?
All MP6401DJ-25BD3-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP6401DJ-25BD3-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 MP6401DJ-25BD3-LF-Z part is unused and in its original packaging.
Return procedure for MP6401DJ-25BD3-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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