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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 LDO
- Quantity:
- Payment:
- Shipping:
Inventory:44,920
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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 accuracy, and reverse battery protection - designed for long-life battery-powered 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 flag functionality, SOT23-6 package compatibility, and thermal shutdown at 160°C.
Technical Context
The MAX8881EUT25-T integrates a 2Ω PMOS pass transistor and internal 1.25V reference to achieve low dropout and stable regulation without external feedback components. Its architecture eliminates base-drive current loss typical of PNP regulators, enabling consistent 3.5µA quiescent current across input voltages (2.5V–12V) and load conditions including dropout.
Reverse battery protection limits IN-to-GND reverse leakage to <1mA when VIN < 0V, while the open-drain POK output asserts low when VOUT falls >10% below nominal or during shutdown. Thermal shutdown activates at +160°C with 15°C hysteresis, enabling pulsed recovery under sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.5% over -40°C to +85°C - ensures stable MCU core or sensor rail without external resistors. |
| Quiescent Current | 3.5µA at VIN = 12V - extends shelf life in standby-mode devices like remote transmitters. |
| 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 systems. |
| Max Output Current | 200mA continuous - sufficient for low-power microcontrollers, RTCs, and CMOS backup circuits. |
| Dropout Voltage | 100mV typical at 50mA - enables operation down to 2.6V input for 2.5V output, maximizing usable battery capacity. |
| POK Threshold | 90% of nominal VOUT with 1.5% hysteresis - provides reliable undervoltage detection for system reset sequencing. |
| Thermal Shutdown | 160°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
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 space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Bypass with 1µF capacitor to GND; accepts 2.5–12V; reverse polarity protected to -14V. |
| 2 (GND) | Ground reference | Common return path for IN, OUT, SHDN, and POK; must be low-impedance for stability. |
| 3 (OUT) | Regulated output | Delivers 2.5V/200mA; requires 4.7µF ceramic capacitor (<0.5Ω ESR) for full-load stability. |
| 4 (FB) | Feedback sense | Internally connected to OUT; no external resistor needed - confirms fixed-output configuration. |
| 5 (SHDN) | Enable/disable control | Active-high logic: ≥2V = ON, ≤0.5V = OFF; draws <100nA bias current when active. |
| 6 (POK) | Power-OK flag | Open-drain output; sinks current when VOUT < 2.25V or SHDN = LOW; requires pull-up to OUT or VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 3.5µA supply current maintained across full input range and dropout - directly extends battery service life in intermittent-use devices. |
| Integrated reverse battery protection | Limits reverse IN current to <1mA at -12V - eliminates need for external series diode and associated 300mV forward drop. |
| Factory-trimmed 2.5V output | ±1.5% accuracy over temperature without external components - reduces BOM count and layout complexity vs. adjustable regulators. |
| Robust fault protection | Combines short-circuit limiting, thermal shutdown with hysteresis, and POK monitoring - enables unattended operation in safety-critical alarms. |
| SOT23-6 footprint | Industry-standard 6-pin package with 0.95mm pitch - allows drop-in replacement and compatibility with high-volume automated assembly. |
Applications
| Smoke Detectors | Battery-Powered Alarms |
|---|---|
Use Scenario: Standby operation for >5 years on two AA alkaline cells, with periodic self-test pulses drawing 100mA. IC Role / Device Role / Timing Role: Primary 2.5V power rail for microcontroller and CO sensor interface circuitry. Use Value: 3.5µA quiescent current minimizes annual self-discharge; POK flag triggers immediate low-battery alert before cell voltage drops below 2.6V. | Use Scenario: Wireless door/window sensor with RF transmission every 30 seconds and deep-sleep between events. IC Role / Device Role / Timing Role: Stable 2.5V supply for sub-GHz transceiver IC and wake-up timer. Use Value: 100mV dropout enables full 2.5V regulation until battery reaches 2.6V, extending operational life by ~12% versus higher-IQ alternatives. |
| Remote Transmitters | Smart Battery Packs |
Use Scenario: Handheld IR remote with push-button wake-up and 50ms transmit burst drawing 150mA. IC Role / Device Role / Timing Role: Low-noise 2.5V source for encoder ASIC and IR LED driver. Use Value: Load-transient response holds output within ±25mV during 150mA step; POK signal synchronizes transmission enable with valid supply. | Use Scenario: Rechargeable Li-ion pack with fuel gauge, protection IC, and status LED driven from single-cell input. IC Role / Device Role / Timing Role: Dedicated 2.5V rail for analog front-end and EEPROM memory. Use Value: Reverse battery protection prevents damage during accidental cell reversal; ±1.5% output accuracy ensures precise ADC reference for state-of-charge calculation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78225DRVR | 250nA IQ, 150mA max, 2.5V fixed, 6-pin WSON - lower IQ but reduced current capability and no reverse battery protection. | Suitable for ultra-long-life IoT sensors where load never exceeds 150mA and reverse connection risk is mitigated externally. | Select if sub-µA standby dominates design priority and thermal margin permits derating. |
| MCP1700T-2502E/TT | 1.6µA IQ, 250mA max, 2.5V fixed, SOT23-5 - lacks POK output and reverse battery protection; 5-pin vs. 6-pin pinout. | Fits cost-sensitive consumer remotes where POK is unused and board layout accommodates different pin count. | Choose when POK flag is unnecessary and PCB redesign allows SOT23-5 footprint. |
Compared with TPS78225DRVR and MCP1700T-2502E/TT, the MAX8881EUT25-T uniquely combines reverse battery protection, POK flag, and 200mA drive in a standard SOT23-6 - making it optimal for safety-critical, battery-replaceable equipment where field-reversal risk and system-level fault signaling are mandatory.
Availability
MAX8881EUT25-T is available at Aetrix Electronics and suitable for smoke detectors, battery-powered alarms, remote transmitters, smart battery packs, and real-time clock backup systems requiring stable component supply and long-term lifecycle support.
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) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX8880/MAX8881 product line targets ultra-low-power battery-operated systems demanding extended shelf life, reverse-polarity resilience, and integrated fault monitoring - exemplified by the MAX8881EUT25-T's 2.5V fixed-output variant.
FAQ
What is the maximum input voltage rating for the MAX8881EUT25-T?
The MAX8881EUT25-T has an absolute maximum input voltage of +14V relative to GND, with recommended operating range from 2.5V to 12V. Operation above 12V is not specified for performance and may reduce reliability; the device includes input undervoltage lockout (UVLO) that disables regulation below 2.1V to prevent unstable startup.
Does the MAX8881EUT25-T require external feedback resistors to set its output voltage?
No, the MAX8881EUT25-T does not require external feedback resistors. It is a factory-preset 2.5V regulator with internal precision resistors connecting FB to OUT; the FB pin is internally tied and must be left connected to OUT per the datasheet - unlike the adjustable MAX8880, which uses external resistors.
How does the POK output function on the MAX8881EUT25-T?
The POK output on the MAX8881EUT25-T is an open-drain signal that pulls low when VOUT drops below 90% of nominal (i.e., <2.25V for 2.5V output) or when SHDN is asserted low. During normal regulation, POK remains high-impedance and requires an external pull-up resistor - typically to OUT or VCC - to generate a logic-high flag.
Can the MAX8881EUT25-T operate with a 1µF output capacitor?
Yes, the MAX8881EUT25-T is stable with a 1µF output capacitor for load currents up to 40mA. For full 200mA operation, a 4.7µF ceramic capacitor with ESR <0.5Ω is required per the datasheet; using 1µF at 200mA risks instability and excessive output ripple during load transients.
What thermal protection mechanism does the MAX8881EUT25-T implement?
The MAX8881EUT25-T incorporates thermal shutdown that activates at +160°C junction temperature with 15°C hysteresis. When triggered, the pass transistor turns off completely, allowing the die to cool; once temperature falls to +145°C, regulation resumes - producing a pulsed output under continuous overload rather than permanent latch-off.
MAX8881EUT25-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- 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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