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Analog Devices Inc./Maxim Integrated MAX8841ELT18+T
- Part No.:
- MAX8841ELT18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WFDFN
- Datasheet:
-
MAX8841ELT18+T.pdf
- Description:
- IC REG LINEAR 1.8V 150MA 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,815
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Product details
Overview
MAX8841ELT18+T from Maxim Integrated is a 1.8V fixed-output, ultra-low-noise, low-dropout linear regulator delivering up to 150mA with 120mV dropout at 120mA load, 40µA ground current, and stable operation using only 1µF ceramic input/output capacitors. It targets noise-sensitive analog rails in portable RF and audio subsystems.
For engineers reviewing the MAX8841ELT18+T datasheet, MAX8841ELT18+T pinout, MAX8841ELT18+T application, or MAX8841ELT18+T equivalent, key selection criteria include output noise (230µVRMS), PSRR (72dB @ 1kHz), shutdown current (<1µA), dropout behavior near battery end-of-life, and µDFN-6 footprint compatibility with space-constrained PCB layouts.
Technical Context
The MAX8841ELT18+T uses a p-channel MOSFET pass transistor (1Ω typical RDS(ON)) enabling low quiescent current and no base-drive loss. Its bandgap reference (1.225V) feeds an error amplifier that controls gate voltage to maintain regulation without external feedback components.
No BP or FB pins are present-this variant omits the bypass capacitor terminal (BP) of MAX8840 and the adjustable feedback (FB) of MAX8842. Shutdown logic disables the reference, error amplifier, and pass transistor, reducing supply current to <1µA while placing OUT in high-impedance state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±3% over load/temperature; enables direct replacement for 1.8V logic and analog supply rails. |
| Max Output Current | 150mA guaranteed minimum; supports moderate-current peripherals like RF transceivers or ADC drivers. |
| Dropout Voltage | 120mV at 120mA load; allows operation down to VIN = 1.92V, extending usable battery life in single-cell Li-ion systems. |
| Ground Current | 40µA typical at light load; minimizes standby power loss in always-on subsystems. |
| PSRR | 72dB at 1kHz, 46dB at 100kHz; suppresses switching noise from DC-DC converters feeding the LDO input. |
| Output Noise | 230µVRMS (100Hz–100kHz); suitable for powering low-noise op-amps, VCOs, and RF front-end biasing. |
| Shutdown Current | <1µA; enables deep-sleep modes in battery-powered devices without compromising wake-up latency. |
Pinout & Package
MAX8841ELT18+T is housed in a 1.5mm × 1.0mm × 0.8mm, 6-pin µDFN package with exposed thermal pad (pin 2 connected to GND). The package supports high-density routing and efficient heat dissipation via GND pad soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Unregulated Input Supply | Accepts 2V–6V 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 copper area or internal 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; must remain unconnected-no pull-up/down or routing required. |
| 5 N.C. | No Internal Connection | Not bonded; electrically isolated; leave floating per datasheet guidance. |
| 6 OUT | Regulated 1.8V Output | Delivers 150mA with ±3% accuracy; bypassed with 1µF ceramic capacitor to GND for load-transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Space-saving µDFN-6 | 1.5mm × 1.0mm footprint reduces PCB area by >50% vs. SOT-23, critical for compact mobile modules. |
| No external feedback network | Factory-trimmed 1.8V output eliminates resistor divider layout, calibration, and drift concerns. |
| Stable with 1µF ceramic capacitors | Eliminates need for costly tantalum or polymer caps; compatible with X5R/X7R dielectrics across full temperature range. |
| Thermal & overcurrent protection | Shuts down at 160°C junction temp with 10°C hysteresis; survives indefinite output short-circuit. |
| Low-noise architecture | 230µVRMS noise enables clean power for RF synthesizers and precision ADC references without added filtering. |
Applications
| Bluetooth Audio Transmitter | Portable Digital Camera Sensor Bias |
|---|---|
|
Use Scenario: Powering the RF PA and crystal oscillator in a Class 2 Bluetooth headset. IC Role / Device Role / Timing Role: Low-noise 1.8V supply for VCO tuning voltage and PA bias rail. Use Value: 230µVRMS noise prevents phase jitter degradation; 72dB PSRR rejects noise from shared 3.3V buck converter. |
Use Scenario: Providing stable analog bias to CMOS image sensor's analog front-end during burst capture. IC Role / Device Role / Timing Role: Precision 1.8V rail for sensor pixel readout and column amplifiers. Use Value: ±3% output accuracy ensures consistent ADC reference scaling; 120mV dropout sustains operation as battery drops to 1.92V. |
| Wireless LAN Baseband IC | Medical Pulse Oximeter Analog Front-End |
|
Use Scenario: Supplying the 1.8V I/O domain of a Wi-Fi SoC in a handheld hotspot device. IC Role / Device Role / Timing Role: Primary low-noise digital I/O supply decoupled from noisy RF sections. Use Value: 40µA ground current extends standby time; shutdown mode reduces system leakage to sub-µA levels. |
Use Scenario: Powering photodiode transimpedance amplifier and analog signal chain in a battery-operated wearable oximeter. IC Role / Device Role / Timing Role: Ultra-low-noise 1.8V source for signal conditioning prior to 24-bit delta-sigma ADC. Use Value: 230µVRMS noise avoids SNR degradation in weak optical signal detection; 1µF ceramic stability simplifies BOM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B182MR-G | 1.8V fixed, 150mA, 250mV dropout @ 100mA, 45µA IQ, no shutdown | Lacks active shutdown; higher dropout limits usable battery range | Choose when shutdown functionality is unnecessary and cost is primary constraint. |
| Analog Devices ADP160ACBZ-1.8-R7 | 1.8V fixed, 150mA, 195mV dropout @ 150mA, 57µA IQ, 27µVRMS noise | Lower noise but higher dropout and ground current; 5-ball WLCSP vs. 6-pin µDFN | Prefer when ultra-low noise dominates over battery life and board area. |
Compared with MAX8841ELT18+T, the XC6219B182MR-G trades shutdown capability and lower dropout for lower cost, while the ADP160ACBZ-1.8-R7 delivers superior noise performance at the expense of larger dropout voltage and higher quiescent current-making MAX8841ELT18+T optimal for balanced noise, efficiency, and footprint in portable RF/audio designs.
Availability
MAX8841ELT18+T is available at Aetrix Electronics and suitable for cellular handsets, Bluetooth accessories, and portable medical sensors requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8841ELT18+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) designs high-performance analog and mixed-signal ICs for power management, sensing, and communications applications.
The MAX8840/MAX8841/MAX8842 family was engineered specifically for ultra-low-noise, space-constrained battery-powered systems-emphasizing minimal PCB area, low quiescent current, and robust transient response in portable RF and imaging equipment.
FAQ
What is the maximum input voltage rating for MAX8841ELT18+T?
The absolute maximum input voltage for MAX8841ELT18+T is +7V relative to GND. However, the recommended operating range is 2V to 6V. Exceeding 6V may compromise long-term reliability even if within absolute ratings, and operation below 2V prevents regulation due to dropout constraints. Always maintain VIN ≥ VOUT + dropout voltage (120mV @ 120mA) for proper function.
Does MAX8841ELT18+T require an external bypass capacitor on the BP pin?
No, MAX8841ELT18+T does not include a BP (bypass) pin-this feature is exclusive to the MAX8840 variant. The MAX8841ELT18+T achieves its specified 230µVRMS output noise without any external BP capacitor. Adding one would have no effect, as the BP terminal is unimplemented and internally disconnected in this part number.
Can MAX8841ELT18+T be used with ceramic capacitors smaller than 1µF?
No-MAX8841ELT18+T is characterized and guaranteed stable only with ≥1µF ceramic output capacitance (X5R/X7R dielectric). Using smaller values risks oscillation or degraded load-transient response. The datasheet explicitly states "stable with 1µF ceramic capacitor for any load," and typical operating curves assume this value. Derating below 1µF voids stability guarantees.
What is the thermal shutdown threshold and hysteresis for MAX8841ELT18+T?
MAX8841ELT18+T activates thermal shutdown at a junction temperature of +160°C and re-enables regulation after cooling by 10°C (hysteresis = 10°C). This protects the device during sustained overload or poor PCB thermal design. During continuous thermal fault, the regulator cycles ON/OFF, producing a pulsed output until ambient conditions improve or load is reduced.
Is MAX8841ELT18+T pin-compatible with other variants in the MAX8840/MAX8841/MAX8842 family?
Yes-MAX8841ELT18+T shares identical 6-pin µDFN-6 (1.5mm × 1.0mm) pinout and footprint with MAX8840 and MAX8842 variants. Pin 1 (IN), Pin 2 (GND), Pin 3 (SHDN), Pins 4–5 (N.C.), and Pin 6 (OUT) are functionally and physically aligned. However, electrical behavior differs: MAX8840 has BP, MAX8842 has FB, and MAX8841 has neither-so PCBs must route only the required signals and leave unused pins unconnected.
MAX8841ELT18+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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)
MAX8841ELT18+T FAQ
1.How can I place an order for MAX8841ELT18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8841ELT18+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 MAX8841ELT18+T reliable?
The price and inventory of MAX8841ELT18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8841ELT18+T is usually 5 days.
3.What payment methods are accepted for MAX8841ELT18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8841ELT18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8841ELT18+T?
MAX8841ELT18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8841ELT18+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 MAX8841ELT18+T?
For technical support, including MAX8841ELT18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8841ELT18+T requirements.
6.How does Aetrix verify that MAX8841ELT18+T is sourced from the original manufacturer or authorized distributors?
All MAX8841ELT18+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 MAX8841ELT18+T meets industry standards.
7.What is the process for return or replacement of MAX8841ELT18+T?
All MAX8841ELT18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8841ELT18+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 MAX8841ELT18+T part is unused and in its original packaging.
Return procedure for MAX8841ELT18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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