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Analog Devices Inc./Maxim Integrated MAX8881EUT50
- Part No.:
- MAX8881EUT50
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX8881EUT50.pdf
- Description:
- IC REG LINEAR 5V 200MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,410
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Product details
Overview
MAX8881EUT50 from Maxim Integrated is a fixed-output, ultra-low-quiescent-current linear regulator delivering 5.0V at up to 200mA with ±1.5% output voltage accuracy, 3.5µA supply current, and reverse battery protection - designed for long-life battery-powered systems such as smoke detectors and smart battery packs.
For engineers reviewing the MAX8881EUT50 datasheet, MAX8881EUT50 pinout, MAX8881EUT50 application, or MAX8881EUT50 equivalent, key selection criteria include dropout voltage (100–200mV at 50mA), POK open-drain flag functionality, SOT23-6 package compatibility, thermal shutdown threshold (160°C), and input voltage range (2.5V to 12V).
Technical Context
The MAX8881EUT50 integrates a 2Ω PMOS pass transistor, internal 1.25V reference, error amplifier, MOSFET driver, and open-drain POK comparator. Its feedback node (FB) is internally tied to OUT, enabling fixed 5.0V regulation without external resistors.
Reverse battery protection limits IN-to-GND reverse leakage to <1mA when VIN < 0V; thermal shutdown activates at +160°C with 15°C hysteresis; shutdown logic disables regulation when SHDN < 0.5V and draws only 1.5–3µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1.5% over -40°C to +85°C - ensures stable MCU core or sensor rail without external feedback components. |
| Supply Current | 3.5µA typical at VIN = 12V - extends shelf life and standby runtime in battery-critical applications 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 inputs. |
| Max Output Current | 200mA continuous - sufficient for low-power microcontrollers, RTCs, and CMOS backup circuits. |
| Dropout Voltage | 100mV typical at 50mA load - enables operation down to VIN = 5.1V, maximizing usable battery capacity. |
| POK Threshold | 90–95% of nominal VOUT with 1.5% hysteresis - provides reliable undervoltage detection for system reset or fault logging. |
| Thermal Shutdown | 160°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
MAX8881EUT50 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 board space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Bypass with 1µF capacitor to GND; accepts 2.5V–12V; reverse polarity protected to <1mA leakage. |
| 2 (GND) | Ground reference | Primary return path for IN, OUT, SHDN, and POK; must connect to low-impedance ground plane. |
| 3 (OUT) | Regulated 5.0V output | Delivers up to 200mA; requires 4.7µF ceramic capacitor (<0.5Ω ESR) for stability at full load. |
| 4 (FB) | Feedback sense node | Internally connected to OUT - no external resistor required; enables fixed 5.0V operation per MAX8881 architecture. |
| 5 (SHDN) | Enable/disable control | Active-high logic: ON when >2V, OFF when <0.5V; draws <100nA bias current; series 100kΩ resistor adds reverse protection. |
| 6 (POK) | Power-OK open-drain flag | Sinks current when VOUT drops below 90–95% of 5.0V or during shutdown; requires external pull-up to OUT or VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 3.5µA at 12V input - reduces standby power loss by >95% vs. standard LDOs, critical for multi-year battery life. |
| Reverse battery protection | IN reverse leakage <1mA at –12V - eliminates need for external blocking diode or FET, saving BOM cost and forward drop. |
| Integrated POK monitor | Open-drain output with 1.5% hysteresis - enables simple, accurate system-level power-fail detection without external comparators. |
| PMOS pass device | 2Ω RDS(ON) - delivers low dropout and zero base-drive current, avoiding IQ increase in dropout unlike PNP-based regulators. |
| Thermal and short-circuit protection | Auto-recovering shutdown at 160°C and foldback current limit - ensures robustness in unattended or sealed environments. |
Applications
| Smoke Detectors | Battery-Powered Alarms |
|---|---|
Use Scenario: Standby operation for >5 years on two AA alkaline cells, with periodic self-test and alarm activation. IC Role / Device Role / Timing Role: Primary 5.0V power regulator for microcontroller, sensor interface, and piezo driver circuitry. Use Value: 3.5µA IQ and reverse battery protection eliminate parasitic drain and installation errors, directly extending field service life. |
Use Scenario: Low-power wireless intrusion alarm with motion sensing and RF transmission bursts. IC Role / Device Role / Timing Role: Stable 5.0V supply for RF transceiver IC and wake-up controller during deep-sleep cycles. Use Value: 100mV dropout at 50mA allows operation until battery voltage falls to 5.1V, extracting maximum energy before replacement. |
| Remote Transmitters | Smart Battery Packs |
Use Scenario: One-button garage door opener using CR2032 coin cell with 10+ year shelf life. IC Role / Device Role / Timing Role: Always-on 5.0V regulator powering ultra-low-power MCU and ASK/OOK modulator. Use Value: ±1.5% output accuracy ensures consistent RF output power across temperature and battery aging. |
Use Scenario: Fuel-gauge and protection circuitry inside Li-ion pack housing, operating from cell stack voltage. IC Role / Device Role / Timing Role: Secondary regulated 5.0V rail for gas gauge IC, EEPROM, and safety MCU independent of main pack output. Use Value: Input range up to 12V supports 3S Li-ion (12.6V max), while POK flag signals pack under-voltage to host system. |
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 |
|---|---|---|---|
| MCP1700T-5002E/TT | 3.5µA IQ, 5.0V fixed, SOT23-3 package - lacks POK, SHDN, and reverse battery protection. | No built-in power-good monitoring or enable control; requires external circuitry for system-level fault response. | Choose when board space is extremely constrained and POK/SHDN are handled elsewhere. |
| TLC7705IPW | 2.5µA IQ, 5.0V fixed, SOT23-5 - includes RESET output but no reverse battery protection or thermal shutdown. | RESET active-low signal replaces POK functionality but offers no reverse polarity safeguard. | Prefer when precise reset timing is prioritized over battery reversal resilience. |
Compared with MCP1700T-5002E/TT and TLC7705IPW, the MAX8881EUT50 uniquely combines ultra-low IQ, integrated POK, reverse battery protection, and thermal shutdown in a single SOT23-6 package - making it optimal for safety-critical, long-life battery systems where reliability and feature integration outweigh minimal pin-count savings.
Availability
MAX8881EUT50 is available at Aetrix Electronics and suitable for smoke detectors, battery-powered alarms, and remote transmitters requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8881EUT50 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 product line was engineered specifically for ultra-low-power, reverse-polarity-resilient battery regulation - targeting applications where every microamp and every millivolt of dropout impacts field lifetime and safety compliance.
FAQ
What is the output voltage tolerance of the MAX8881EUT50 over temperature?
The MAX8881EUT50 maintains ±1.5% output voltage accuracy over the full –40°C to +85°C operating range, with typical deviation from nominal 5.0V less than ±0.2% at +25°C. This specification is measured at 20mA load and accounts for initial tolerance, line regulation, and load regulation effects as defined in the datasheet's Electrical Characteristics table.
Does the MAX8881EUT50 require external feedback resistors to set its 5.0V output?
No, the MAX8881EUT50 does not require external feedback resistors. Its FB pin is internally connected to the OUT pin, and the 5.0V output is factory-trimmed using precision internal resistors - simplifying layout and eliminating resistor tolerance errors that affect adjustable regulators like the MAX8880.
Can the MAX8881EUT50 be used with a 12V input without derating?
Yes, the MAX8881EUT50 supports input voltages up to 12V continuously. However, power dissipation must be managed: at 12V input and 5V/200mA output, PD = 1.4W. In the SOT23-6 package, this exceeds the 696mW continuous rating at +70°C ambient, so thermal design (e.g., copper pour, airflow) or reduced load is required for sustained operation.
How does the POK output of the MAX8881EUT50 behave during shutdown?
The POK output of the MAX8881EUT50 is actively pulled low during shutdown (when SHDN < 0.5V) and also when VOUT falls below 90–95% of 5.0V. It remains in high-impedance state only during normal regulation. A pull-up resistor to OUT or VCC is mandatory to generate a valid logic-high signal during healthy operation.
Is the MAX8881EUT50 pin-compatible with other MAX8881 variants like MAX8881EUT33?
Yes, all MAX8881 variants - including MAX8881EUT18, MAX8881EUT25, MAX8881EUT33, and MAX8881EUT50 - share identical SOT23-6 pinout, electrical behavior, and package dimensions. Only the factory-set output voltage differs; no PCB changes are needed when substituting between them.
MAX8881EUT50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 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
MAX8881EUT50 FAQ
1.How can I place an order for MAX8881EUT50 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8881EUT50 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 MAX8881EUT50 reliable?
The price and inventory of MAX8881EUT50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8881EUT50 is usually 5 days.
3.What payment methods are accepted for MAX8881EUT50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8881EUT50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8881EUT50?
MAX8881EUT50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8881EUT50 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 MAX8881EUT50?
For technical support, including MAX8881EUT50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8881EUT50 requirements.
6.How does Aetrix verify that MAX8881EUT50 is sourced from the original manufacturer or authorized distributors?
All MAX8881EUT50 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 MAX8881EUT50 meets industry standards.
7.What is the process for return or replacement of MAX8881EUT50?
All MAX8881EUT50 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8881EUT50, 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 MAX8881EUT50 part is unused and in its original packaging.
Return procedure for MAX8881EUT50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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