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Analog Devices Inc./Maxim Integrated MAX8841ELT33+T
- Part No.:
- MAX8841ELT33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WFDFN
- Datasheet:
-
MAX8841ELT33+T.pdf
- Description:
- IC REG LINEAR 3.3V 150MA 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:100,120
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Product details
Overview
MAX8841ELT33+T from Maxim Integrated is a preset 3.3V, 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. It targets noise-sensitive RF and analog circuitry in portable battery-powered systems.
For engineers reviewing the MAX8841ELT33+T datasheet, MAX8841ELT33+T pinout, MAX8841ELT33+T application, or MAX8841ELT33+T equivalent, key selection criteria include its 3.3V fixed output, µDFN-6 (1.5mm × 1.0mm) package, absence of bypass capacitor requirement, 72dB PSRR at 1kHz, and guaranteed 150mA output capability under industrial temperature range.
Technical Context
The MAX8841ELT33+T uses a p-channel MOSFET pass transistor with 1Ω typical RDS(ON), enabling low dropout and eliminating base-drive current loss. Its bandgap reference (1.225V) feeds an error amplifier that controls the pass gate to maintain regulation without external feedback components.
Unlike the MAX8840 (which requires a BP capacitor for noise reduction), the MAX8841ELT33+T omits the BP pin-replacing it with N.C.-and achieves simplified layout by removing the need for a dedicated noise-bypass capacitor while retaining high PSRR and low ground current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3% over -40°C to +85°C - ensures stable rail for 3.3V logic, ADCs, and RF ICs without external resistors. |
| Max Output Current | 150mA guaranteed minimum - supports moderate-power subsystems like Bluetooth radios or camera modules. |
| Dropout Voltage | 120mV at 120mA load - enables operation down to VIN = 3.42V, extending usable battery life in single-cell Li-ion systems. |
| Ground Current | 40µA typical at light load - minimizes quiescent power loss critical for always-on sensor nodes and standby modes. |
| PSRR | 72dB at 1kHz, 46dB at 100kHz - suppresses switching noise from DC-DC converters feeding the LDO input. |
| Input Voltage Range | 2V to 6V - compatible with Li-ion (2.7–4.2V), Li-poly, and regulated 5V supplies. |
| Shutdown Current | <1µA - enables deep-sleep power gating in portable devices. |
Pinout & Package
MAX8841ELT33+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 thermal performance. The package footprint matches standard 0.65mm pitch land pattern per Maxim's 21-0147 outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Unregulated Input Supply | Accepts 2V–6V input; requires 1µF ceramic decoupling close to pin for stability and transient response. |
| 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; draws <0.01µA bias current; connect to IN for always-on operation. |
| 4 N.C. | No Internal Connection | Not bonded; must remain unconnected - no routing or soldering required. |
| 5 N.C. | No Internal Connection | Second unused pin; electrically isolated - leave floating per datasheet guidance. |
| 6 OUT | Regulated 3.3V Output | Delivers up to 150mA; bypassed with 1µF ceramic capacitor to GND; low ESR essential for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Space-saving µDFN | 1.5mm × 1.0mm footprint - reduces PCB area by >50% vs. SOT-23, enabling ultra-compact wearable designs. |
| No Bypass Capacitor Required | Eliminates BP pin and 10nF capacitor - simplifies BOM, lowers cost, and removes noise-tuning dependency. |
| Stable with 1µF Ceramic Cap | Guaranteed stability across temperature and load with X5R/X7R dielectrics - avoids larger, less reliable capacitors. |
| Overcurrent & Thermal Protection | Current limit ≥150mA and shutdown at 160°C with 10°C hysteresis - prevents damage during fault conditions. |
| Low Ground Current | 40µA typical at light load - extends battery runtime in intermittent-operation applications like IoT sensors. |
Applications
| Bluetooth Audio Transmitter | Portable Digital Camera Sensor Rail |
|---|---|
|
Use Scenario: Powering the RF transceiver and audio codec in a Bluetooth headset with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Provides clean, low-noise 3.3V bias to minimize phase noise and SNR degradation in 2.4GHz RF front-end. Use Value: 72dB PSRR at 1kHz rejects switching noise from companion buck converter, preserving EVM and audio fidelity. |
Use Scenario: Supplying image sensor and ISP core voltage in compact digital cameras with tight thermal constraints. IC Role / Device Role / Timing Role: Delivers stable 3.3V rail with fast load-transient response to handle burst pixel readout currents. Use Value: 120mV dropout at 120mA allows operation until battery drops to 3.42V, maximizing capture time per charge. |
| Medical Pulse Oximeter Analog Front-End | Industrial Handheld Scanner Logic Rail |
|
Use Scenario: Biasing low-noise op-amps and ADCs in battery-operated pulse oximeters requiring sub-µV noise floor. IC Role / Device Role / Timing Role: Supplies ultra-stable 3.3V reference for precision analog signal chain, minimizing offset drift. Use Value: 40µA ground current extends operating time between charges without compromising measurement accuracy. |
Use Scenario: Powering microcontroller, display driver, and barcode decoder ASIC in rugged handheld scanners. IC Role / Device Role / Timing Role: Acts as primary 3.3V system rail with robust thermal protection for intermittent high-current decoding bursts. Use Value: Thermal shutdown at 160°C with 10°C hysteresis prevents latch-up during extended use in hot ambient environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2033PDQNR | Lower 25µA IQ but higher 175mV dropout at 150mA; 1.6V–6.0V input; no thermal shutdown. | Better for ultra-low-IQ wearables; unsuitable where thermal fault protection is mandatory. | Select when lowest quiescent current dominates over thermal safety and dropout margin. |
| MCP1700-3302E/TO | Higher 200mV dropout at 250mA; 150mA max rated; 2.7V–13.2V input; TO-92 package (larger, through-hole). | Used in legacy industrial controls; lacks µDFN size and PSRR performance for RF apps. | Choose only for cost-sensitive, non-space-constrained designs needing basic 3.3V regulation. |
Compared with TPS7A2033PDQNR and MCP1700-3302E/TO, the MAX8841ELT33+T uniquely balances ultra-low noise immunity (via high PSRR), minimal board area (µDFN), and integrated thermal/current protection - making it optimal for next-gen portable RF and medical electronics where reliability and density are co-critical.
Availability
MAX8841ELT33+T is available at Aetrix Electronics and suitable for Bluetooth accessories, portable imaging systems, medical diagnostics equipment, and industrial handheld terminals requiring stable component supply across multi-year production cycles.
Supply support for MAX8841ELT33+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 demanding applications.
The MAX8840/MAX8841/MAX8842 family was designed specifically for space-constrained, battery-powered systems requiring ultra-low noise, high PSRR, and minimal external components - targeting cellular infrastructure, portable radios, and precision analog subsystems.
FAQ
What is the output voltage tolerance of the MAX8841ELT33+T over temperature and load?
The MAX8841ELT33+T guarantees ±3% output voltage accuracy across full industrial temperature range (-40°C to +85°C) and load current (100µA to 80mA). At room temperature and 1mA load, typical deviation is ±1%. This tolerance ensures reliable operation of 3.3V logic interfaces and ADC references without trimming.
Does the MAX8841ELT33+T require an external feedback resistor network?
No, the MAX8841ELT33+T does not require external feedback resistors. It is factory-preset to 3.3V and contains internal precision voltage-divider circuitry. Unlike the adjustable MAX8842, the MAX8841ELT33+T operates as a fully self-contained 3.3V regulator with only IN, GND, SHDN, and OUT connections needed.
Can the MAX8841ELT33+T be used with input voltages below 2.0V?
No, the MAX8841ELT33+T has a specified minimum input voltage of 2.0V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.0V is not characterized or guaranteed, and may result in loss of regulation or undefined behavior. For sub-2V operation, consider alternative LDOs with lower VIN(min).
How does the shutdown functionality work on the MAX8841ELT33+T?
The MAX8841ELT33+T features active-low shutdown: driving SHDN ≤0.4V disables the voltage reference, error amplifier, and pass transistor, reducing supply current to <1µA and placing OUT in high-impedance state. SHDN must be pulled high (≥1.5V) for normal operation; connecting SHDN directly to IN provides default-enable behavior.
Is the MAX8841ELT33+T compatible with 100% ceramic output capacitors?
Yes, the MAX8841ELT33+T is fully stable with 1µF X5R or X7R ceramic capacitors on the output, as confirmed in the datasheet's "Capacitor Selection and Regulator Stability" section. Z5U/Y5V dielectrics are discouraged due to capacitance drift; for wide-temperature operation, X7R is recommended to ensure stability across -40°C to +85°C.
MAX8841ELT33+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.12V @ 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-µDFN (1.5x1)
MAX8841ELT33+T FAQ
1.How can I place an order for MAX8841ELT33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8841ELT33+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 MAX8841ELT33+T reliable?
The price and inventory of MAX8841ELT33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8841ELT33+T is usually 5 days.
3.What payment methods are accepted for MAX8841ELT33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8841ELT33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8841ELT33+T?
MAX8841ELT33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8841ELT33+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 MAX8841ELT33+T?
For technical support, including MAX8841ELT33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8841ELT33+T requirements.
6.How does Aetrix verify that MAX8841ELT33+T is sourced from the original manufacturer or authorized distributors?
All MAX8841ELT33+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 MAX8841ELT33+T meets industry standards.
7.What is the process for return or replacement of MAX8841ELT33+T?
All MAX8841ELT33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8841ELT33+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 MAX8841ELT33+T part is unused and in its original packaging.
Return procedure for MAX8841ELT33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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