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Analog Devices Inc./Maxim Integrated MAX8841ELT25+T
- Part No.:
- MAX8841ELT25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WFDFN
- Datasheet:
-
MAX8841ELT25+T.pdf
- Description:
- IC REG LINEAR 2.5V 150MA 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,867
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Product details
Overview
MAX8841ELT25+T from Maxim Integrated is a preset 2.5V, ultra-low-noise, low-dropout linear regulator delivering up to 150mA output current with 120mV dropout at 120mA load, 40µA ground current, and stable operation using only 1µF ceramic input/output capacitors - designed for noise-sensitive RF and analog power rails in portable electronics.
For engineers reviewing the MAX8841ELT25+T datasheet, MAX8841ELT25+T pinout, MAX8841ELT25+T application, or MAX8841ELT25+T equivalent, key selection criteria include its 2.5V fixed output, µDFN-6 (1.5mm × 1.0mm) package, no-bypass-capacitor architecture, 72dB PSRR at 1kHz, and guaranteed 150mA output with thermal/overcurrent protection.
Technical Context
The MAX8841ELT25+T uses a p-channel MOSFET pass transistor (1Ω typical RDS(ON)) enabling low quiescent current (40µA at light load) and eliminating base-drive losses inherent in PNP-based LDOs. Its internal feedback divider sets the 2.5V output without external resistors.
No BP (bypass) pin is present - unlike the MAX8840 - and the N.C. pin (Pin 4) is unconnected, simplifying layout and reducing BOM count. Shutdown logic disables reference, error amplifier, and pass transistor, dropping supply current below 1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±3% over -40°C to +85°C - ensures stable biasing for 2.5V ADC references or RF ICs without trimming. |
| Max Output Current | 150mA guaranteed minimum - supports moderate-power analog subsystems like Bluetooth transceivers or camera ISPs. |
| Dropout Voltage | 120mV at 120mA load - enables operation down to VIN = 2.62V, extending battery life in single-cell Li-ion systems. |
| Ground Current | 40µA typical at no load - minimizes standby power loss in always-on sensor nodes or sleep-mode peripherals. |
| PSRR | 72dB at 1kHz, 46dB at 100kHz - suppresses switching noise from DC-DC converters feeding adjacent digital blocks. |
| Input Voltage Range | 2.0V to 6.0V - compatible with Li-ion (2.7–4.2V), Li-poly, and regulated 3.3V/5V rails without external level-shifting. |
| Shutdown Current | <1µA - enables deep-sleep modes in portable devices while retaining fast wake-up capability (300µs exit delay). |
Pinout & Package
MAX8841ELT25+T is housed in a lead-free, RoHS-compliant 6-pin µDFN package measuring 1.5mm × 1.0mm × 0.8mm, with exposed thermal pad (GND-connected) for enhanced power dissipation in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Unregulated Input Supply | Accepts 2.0V–6.0V input; requires 1µF ceramic capacitor to GND for stability and line-transient suppression. |
| 2 GND | Ground Reference & Thermal Path | Primary return path and thermal conduction node; must connect to large PCB copper area or ground plane. |
| 3 SHDN | Active-Low Shutdown Control | Pull ≤0.4V to disable regulator; logic-high ≥1.5V enables operation; draws ≤0.01µA bias current. |
| 4 N.C. | No Internal Connection | Not bonded or connected internally - leave floating or tie to GND per layout best practice; no electrical function. |
| 5 OUT | Regulated 2.5V Output | Delivers up to 150mA; bypassed with 1µF ceramic capacitor to GND; high-impedance during shutdown. |
| 6 N.C. | No Internal Connection | Unused terminal - no internal bond wire; electrically isolated; may be left unconnected or grounded for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| No external bypass capacitor required | Eliminates BP pin and associated 10nF capacitor - reduces component count, PCB area, and cost vs. MAX8840 variants. |
| Stable with 1µF ceramic capacitors | Enables use of small, low-ESR X5R/X7R MLCCs on both input and output - avoids larger tantalum or aluminum electrolytics. |
| Ultra-low ground current | 40µA typical at zero load - extends battery runtime in intermittently active IoT sensors and wearables. |
| Integrated protection | Thermal shutdown (160°C trip, 10°C hysteresis) and current limiting (150–300mA range) prevent damage under fault conditions. |
| Fast shutdown exit | 300µs typical delay from SHDN high to VOUT reaching 90% of 2.5V - supports rapid power-state transitions in mobile SoC subsystems. |
Applications
| Bluetooth Audio Transmitter | Portable Digital Camera Sensor Bias |
|---|---|
|
Use Scenario: Powering the RF front-end and audio codec in compact Bluetooth headsets requiring clean 2.5V supply. IC Role / Device Role / Timing Role: Low-noise LDO supplying bias voltage to 2.5V RF power amplifier and sigma-delta DAC. Use Value: 72dB PSRR at 1kHz rejects noise from shared 3.3V DC-DC converter, preventing audible artifacts and RF desense. |
Use Scenario: Providing precision analog supply to CMOS image sensor's analog signal chain in pocket-sized cameras. IC Role / Device Role / Timing Role: Fixed 2.5V regulator powering sensor analog core and column ADC reference. Use Value: 120mV dropout allows operation until battery drops to 2.62V, maximizing usable capacity from single-cell Li-ion. |
| Medical Pulse Oximeter Analog Front-End | Industrial Handheld Scanner Laser Driver Bias |
|
Use Scenario: Delivering ultra-clean 2.5V to photodiode transimpedance amplifier and LED driver in battery-powered oximeters. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO isolating sensitive analog measurement circuitry from digital MCU noise. Use Value: 40µA ground current extends operating time between charges; thermal protection prevents overheating during extended LED pulses. |
Use Scenario: Supplying stable 2.5V bias to laser diode driver IC in rugged handheld barcode scanners. IC Role / Device Role / Timing Role: High-reliability LDO ensuring consistent laser threshold voltage despite battery voltage sag. Use Value: Guaranteed 150mA output supports peak laser drive currents; 1.5mm × 1.0mm µDFN fits tight optical module footprints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B252MR-G | 2.5V fixed, 150mA, 120mV dropout, but 60µA quiescent current and 55dB PSRR @ 1kHz - higher noise and lower rejection than MAX8841ELT25+T. | Lacks thermal shutdown; rated only to +85°C (same as MAX8841), but no overcurrent protection. | Choose when lowest BOM cost is critical and PSRR >70dB is not required. |
| Analog Devices ADP160ACBZ-2.5-R7 | 2.5V fixed, 150mA, 195mV dropout @ 150mA, 1.8µA quiescent current - superior shutdown current but higher dropout limits low-VIN usability. | Includes soft-start; no thermal shutdown; specified for automotive AEC-Q200 Grade 3 (-40°C to +125°C). | Prefer for ultra-low-IQ designs where input voltage stays ≥2.7V and extended temperature range is needed. |
Compared with Torex XC6219B252MR-G and ADP160ACBZ-2.5-R7, the MAX8841ELT25+T uniquely balances ultra-low noise sensitivity (via optimized internal architecture), robust protection (thermal + current limit), and minimal external components - making it optimal for space-constrained, battery-powered RF/analog systems demanding predictable 2.5V regulation.
Availability
MAX8841ELT25+T is available at Aetrix Electronics and suitable for portable medical devices, Bluetooth accessories, digital imaging modules, and industrial handheld scanners requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MAX8841ELT25+T 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX8840/MAX8841/MAX8842 family was engineered specifically for ultra-low-noise, low-quiescent power delivery in miniaturized portable electronics - prioritizing PSRR, dropout, and board-area efficiency over programmability or wide-input flexibility.
FAQ
What is the output voltage tolerance of the MAX8841ELT25+T over temperature and load?
The MAX8841ELT25+T guarantees ±3% output voltage accuracy across full load (100µA to 80mA) and temperature (-40°C to +85°C). At +25°C and 1mA load, typical deviation is ±1%. This ensures reliable operation for 2.5V-tolerant analog circuits without external trimming or calibration.
Does the MAX8841ELT25+T require an external feedback resistor network?
No. The MAX8841ELT25+T features a factory-preset 2.5V output with internal feedback divider - no external resistors are needed. This distinguishes it from the adjustable MAX8842 and simplifies design versus the MAX8840, which requires a BP capacitor for noise reduction.
Can the MAX8841ELT25+T operate from a single-cell Li-ion battery throughout its discharge curve?
Yes. With a 2.5V output and 120mV dropout at 120mA, the MAX8841ELT25+T remains functional down to VIN = 2.62V - well within the usable 2.7V–4.2V range of a discharged single-cell Li-ion battery, maximizing system runtime.
What is the thermal performance of the MAX8841ELT25+T in the µDFN package?
The MAX8841ELT25+T has a junction-to-ambient thermal resistance (θJA) of 477°C/W in the 1.5mm × 1.0mm µDFN. With its exposed GND pad, thermal performance improves significantly when soldered to ≥25mm² copper area - enabling continuous 150mA operation at +70°C ambient if properly heatsinked.
How does the MAX8841ELT25+T compare to the MAX8840ELT25+T in terms of noise performance?
The MAX8840ELT25+T achieves 11µVRMS output noise (100Hz–100kHz) using a 10nF BP capacitor, while the MAX8841ELT25+T - lacking BP - delivers 230µVRMS. For ultra-low-noise applications (e.g., RF synthesizers), MAX8840 is preferred; for general-purpose 2.5V analog rails where simplicity matters more, MAX8841ELT25+T is optimal.
MAX8841ELT25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.135V @ 120mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 72dB ~ 46dB (1kHz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-uDFN (1.5x1.0)
MAX8841ELT25+T FAQ
1.How can I place an order for MAX8841ELT25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8841ELT25+T 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 MAX8841ELT25+T reliable?
The price and inventory of MAX8841ELT25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8841ELT25+T is usually 5 days.
3.What payment methods are accepted for MAX8841ELT25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8841ELT25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8841ELT25+T?
MAX8841ELT25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8841ELT25+T 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 MAX8841ELT25+T?
For technical support, including MAX8841ELT25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8841ELT25+T requirements.
6.How does Aetrix verify that MAX8841ELT25+T is sourced from the original manufacturer or authorized distributors?
All MAX8841ELT25+T 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 MAX8841ELT25+T meets industry standards.
7.What is the process for return or replacement of MAX8841ELT25+T?
All MAX8841ELT25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8841ELT25+T, 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 MAX8841ELT25+T part is unused and in its original packaging.
Return procedure for MAX8841ELT25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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