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Analog Devices Inc./Maxim Integrated MAX8881EUT25+T
- Part No.:
- MAX8881EUT25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX8881EUT25+T.pdf
- Description:
- IC REG LINEAR 2.5V 200MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:373
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Product details
Overview
MAX8881EUT25+T from Maxim Integrated is a fixed-output, ultra-low-quiescent-current LDO linear regulator delivering 2.5V at up to 200mA with 3.5µA supply current, ±1.5% output voltage accuracy, and reverse battery protection - designed for long-life battery-powered systems such as smoke detectors and smart battery packs.
For engineers reviewing the MAX8881EUT25+T datasheet, MAX8881EUT25+T pinout, MAX8881EUT25+T application, or MAX8881EUT25+T equivalent, key selection criteria include dropout voltage (100–200mV at 50mA), POK open-drain fault indicator, input voltage range (2.5V–12V), and SOT23-6 package compatibility with space-constrained portable designs.
Technical Context
The MAX8881EUT25+T integrates a 2Ω PMOS pass transistor and internal 1.25V reference to enable low-dropout operation and stable regulation without external feedback components. Its shutdown logic disables regulation when SHDN < 0.5V, reducing supply current to 1.5–3µA while maintaining reverse battery protection down to –12V on IN.
Internal thermal shutdown activates at +160°C (15°C hysteresis), and the POK comparator asserts low when VOUT falls >10% below nominal - both functions operate across –40°C to +85°C ambient. The device requires only 1µF input and 4.7µF output capacitors (ESR < 0.5Ω) for stability at full 200mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.5% over –40°C to +85°C - ensures precise rail generation for 2.5V logic or analog circuitry without trimming. |
| Supply Current | 3.5µA typical at VIN = 12V - extends battery life in multi-year standby applications like wireless sensors. |
| Input Voltage Range | 2.5V to 12V - supports single-cell Li-ion (3.0–4.2V), dual-cell alkaline (2.4–3.2V), and 9V battery inputs. |
| Max Output Current | 200mA continuous - sufficient for microcontrollers, RF transceivers, and real-time clocks in compact portable devices. |
| Dropout Voltage | 100mV typical at 50mA load - enables regulation down to VIN = 2.6V for 2.5V output, maximizing usable battery voltage. |
| POK Threshold | 90% of nominal VOUT with 1.5% hysteresis - provides reliable undervoltage detection for system reset or fault logging. |
| Reverse Battery Protection | IN reverse leakage <1mA at –12V - prevents damage and battery drain when batteries are inserted backward. |
Pinout & Package
MAX8881EUT25+T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA, 2.9mm × 2.8mm × 1.3mm), with exposed pad not present - compatible with standard SOT23 reflow profiles and manual soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input voltage supply | Battery or DC source input (2.5V–12V); bypass with 1µF capacitor to GND for noise suppression. |
| 2 GND | Ground reference | Primary return path for all internal circuits and output current; must connect to low-impedance PCB ground plane. |
| 3 OUT | Regulated output | 2.5V output capable of sourcing up to 200mA; requires 4.7µF ceramic capacitor (ESR < 0.5Ω) to GND for stability. |
| 4 FB | Feedback sense node | Internally connected to OUT - no external resistors needed; ties internal divider to set fixed 2.5V output. |
| 5 SHDN | Enable/disable control | Active-high logic input; regulator enabled when >2V, disabled when <0.5V; connect to IN if unused. |
| 6 POK | Power-OK open-drain flag | Drives low when VOUT drops >10% or during shutdown; requires external pull-up for reset or monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (3.5µA) | Enables >10-year battery life in low-duty-cycle IoT sensors by minimizing quiescent drain during sleep modes. |
| Reverse battery protection | Prevents >1mA reverse current at –12V on IN, eliminating need for external series diode and its associated voltage drop. |
| Integrated POK comparator | Provides system-level fault signaling without external supervision IC - reduces BOM count and board area. |
| Thermal shutdown with hysteresis | Shuts down at +160°C and auto-recovers after 15°C cooldown - protects against sustained overload without latch-up. |
| Stable with low-ESR ceramics | Operates reliably with 4.7µF X7R/X5R capacitors (ESR < 0.5Ω), enabling use of small, low-cost MLCCs instead of tantalum. |
Applications
| Smoke Detectors | Battery-Powered Alarms |
|---|---|
Use Scenario: Standby operation for >5 years on two AA alkaline cells, with periodic smoke-sensing bursts. IC Role / Device Role / Timing Role: Primary 2.5V power rail regulator for CMOS sensor interface and microcontroller core. Use Value: 3.5µA quiescent current directly extends battery service life; reverse battery protection avoids field failures from incorrect battery insertion. |
Use Scenario: Wireless door/window contact alarm with coin-cell backup and RF transmission on event. IC Role / Device Role / Timing Role: Stable 2.5V supply for ultra-low-power MCU and sub-GHz transceiver during wake-up and transmit phases. Use Value: 200mA peak current supports fast RF burst transmission; POK output triggers MCU reset if battery sags during transmission. |
| Smart Battery Packs | Real-Time Clocks |
Use Scenario: Fuel-gauge and protection circuitry inside Li-ion pack, powered from cell stack via step-down converter. IC Role / Device Role / Timing Role: Secondary LDO providing clean 2.5V for gas-gauge ADC and SMBus interface logic. Use Value: Input range up to 12V accommodates 3S Li-ion (12.6V max); ±1.5% accuracy ensures precise voltage reference for coulomb counting. |
Use Scenario: Backup power management for RTC in industrial controllers, retaining time during main power loss. IC Role / Device Role / Timing Role: Low-noise 2.5V regulator for RTC crystal oscillator and SRAM retention circuitry. Use Value: 300µVRMS output noise (10Hz–100kHz) prevents timing jitter; reverse protection safeguards RTC during battery swap. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78225DRVR | Lower IQ (500nA), but only 150mA output; 2.5V fixed; no POK output; 1.8–5.5V input range. | Suitable for ultra-long-life coin-cell applications where POK is unnecessary and load current ≤150mA. | Select TPS78225DRVR only if nanoscale IQ dominates design priority and POK functionality is omitted. |
| MCP1702T-2502E/MB | Higher IQ (2.5µA), 250mA output, no reverse battery protection, no POK, 2.7–13.2V input range. | Fits cost-sensitive industrial sensors where reverse polarity risk is mitigated externally and fault signaling is handled by MCU. | Choose MCP1702T-2502E/MB when budget constraints outweigh need for integrated reverse protection and POK. |
Compared with TPS78225DRVR and MCP1702T-2502E/MB, the MAX8881EUT25+T uniquely combines 3.5µA IQ, 200mA drive, reverse battery protection, and POK in a single SOT23-6 package - making it optimal for safety-critical, battery-reliant systems requiring fault visibility and polarity resilience.
Availability
MAX8881EUT25+T is available at Aetrix Electronics and suitable for smoke detectors, battery-powered alarms, smart battery packs, real-time clocks, and remote transmitters requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX8881EUT25+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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and consumer applications.
The MAX8880/MAX8881 family was designed specifically for ultra-low-power, reverse-polarity-resilient LDO regulation in battery-powered equipment - emphasizing longevity, reliability, and integration of protection features in minimal footprint.
FAQ
What is the maximum input voltage rating for MAX8881EUT25+T?
The MAX8881EUT25+T has an absolute maximum input voltage of +14V, but its specified operating input range is 2.5V to 12V. Operation above 12V is not guaranteed for regulation performance or long-term reliability, and exceeding +14V risks permanent damage. For 12V battery systems, the MAX8881EUT25+T remains within safe operating limits even at full charge.
Does MAX8881EUT25+T require external feedback resistors to set its output voltage?
No, the MAX8881EUT25+T does not require external feedback resistors. It is factory-trimmed to deliver a fixed 2.5V output; the FB pin is internally connected to OUT. External resistors are only required for the adjustable MAX8880 variant. Using MAX8881EUT25+T simplifies layout and eliminates resistor tolerance errors affecting output accuracy.
How does the POK output function in MAX8881EUT25+T?
The POK output of MAX8881EUT25+T is an open-drain signal that pulls low when the regulated output falls more than 10% below 2.5V (i.e., below ~2.25V) or during shutdown. It remains high-impedance otherwise. A pull-up resistor (e.g., 100kΩ to VOUT) is required to generate a logic-high signal during normal operation - enabling direct interfacing with MCU reset or interrupt inputs.
Can MAX8881EUT25+T be used with a 1.5V alkaline battery?
No, MAX8881EUT25+T cannot regulate from a single 1.5V alkaline cell because its minimum input voltage is 2.5V. It requires at least two alkaline cells (nominal 3.0V) or a Li-ion cell (3.0–4.2V). Attempting to operate below 2.5V results in dropout and unregulated output; the device will not function as intended with 1.5V input.
What thermal protection behavior does MAX8881EUT25+T exhibit under overload?
Under sustained overload, MAX8881EUT25+T activates thermal shutdown at +160°C junction temperature and cycles on/off with 15°C hysteresis - turning off the pass transistor until junction cools to +145°C, then resuming regulation. This pulsed behavior prevents destruction but is not intended for continuous operation; designers must ensure PCB thermal design keeps steady-state junction temperature ≤+150°C.
MAX8881EUT25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 50mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 10 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX8881EUT25+T FAQ
1.How can I place an order for MAX8881EUT25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8881EUT25+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 MAX8881EUT25+T reliable?
The price and inventory of MAX8881EUT25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8881EUT25+T is usually 5 days.
3.What payment methods are accepted for MAX8881EUT25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8881EUT25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8881EUT25+T?
MAX8881EUT25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8881EUT25+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 MAX8881EUT25+T?
For technical support, including MAX8881EUT25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8881EUT25+T requirements.
6.How does Aetrix verify that MAX8881EUT25+T is sourced from the original manufacturer or authorized distributors?
All MAX8881EUT25+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 MAX8881EUT25+T meets industry standards.
7.What is the process for return or replacement of MAX8881EUT25+T?
All MAX8881EUT25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8881EUT25+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 MAX8881EUT25+T part is unused and in its original packaging.
Return procedure for MAX8881EUT25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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