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Analog Devices Inc./Maxim Integrated MAX8881EUT30
- Part No.:
- MAX8881EUT30
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX8881EUT30.pdf
- Description:
- 12V, ULTRA-LOW-IQ, LOW-DROPOUT L
- Quantity:
- Payment:
- Shipping:
Inventory:354
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Product details
Overview
MAX8881EUT30 from Maxim Integrated is a fixed-output, ultra-low-quiescent-current LDO linear regulator delivering 3.3V at up to 200mA with ±1.5% output voltage accuracy, 3.5µA supply current at 12V input, and integrated reverse-battery protection - designed for long-life battery-powered smoke detectors and smart battery packs.
For engineers reviewing the MAX8881EUT30 datasheet, MAX8881EUT30 pinout, MAX8881EUT30 application, or MAX8881EUT30 equivalent, key selection criteria include dropout voltage (100–200mV at 50mA), POK open-drain fault indicator behavior, thermal shutdown threshold (160°C), SOT23-6 package compatibility, and factory-preset 3.3V output without external feedback components.
Technical Context
The MAX8881EUT30 implements a P-channel MOSFET pass device (RDS(ON) = 2Ω) enabling ultra-low quiescent current across full load and dropout conditions, unlike PNP-based regulators that increase IQ in dropout. Its internal 1.25V reference feeds an error amplifier comparing FB (tied to OUT) against VREF, driving the PMOS gate to regulate output.
Reverse battery protection limits IN-to-GND reverse leakage to <1mA when VIN < 0V; the POK comparator asserts low when VOUT drops >10% below nominal (i.e., <2.97V for 3.3V output), with 1.5% hysteresis and open-drain output requiring external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.5% over -40°C to +85°C - eliminates need for external resistor divider and ensures stable rail for 3.3V logic and RF modules. |
| Supply Current | 3.5µA typical at VIN = 12V - extends shelf life and standby runtime in battery-powered alarms and remote transmitters. |
| Dropout Voltage | 100mV typical at IOUT = 50mA - enables operation down to ~3.4V input with 3.3V output, critical for end-of-discharge battery use. |
| Input Voltage Range | 2.5V to 12V - supports single-cell Li-ion (up to 4.2V), two-cell alkaline (up to 3.2V), and multi-cell configurations. |
| POK Threshold | 90% of nominal VOUT (2.97V) with 1.5% hysteresis - provides reliable undervoltage detection for system reset or battery low-warning signaling. |
| Thermal Shutdown | 160°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB heat sinking. |
| Output Current Limit | 200mA continuous, indefinite short-circuit tolerance - protects downstream circuitry without external current-limiting components. |
Pinout & Package
MAX8881EUT30 is packaged in a 6-pin SOT23-6 (JEDEC MO-178AA) with exposed pad not present - footprint compatible with standard SOT23-6 land patterns and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Battery or DC source input (2.5V–12V); requires 1µF bypass capacitor to GND for stability and noise rejection. |
| 2 (GND) | Ground reference | Primary return path for all internal circuits and output current; must connect to low-impedance system ground plane. |
| 3 (OUT) | Regulated output | 3.3V output capable of sourcing up to 200mA; requires 4.7µF output capacitor (<0.5Ω ESR) for full-load stability. |
| 4 (FB) | Feedback node | Internally connected to OUT - no external resistors needed; ties internal 1.25V reference to output for fixed-voltage regulation. |
| 5 (SHDN) | Enable/disable control | Active-high shutdown: device enabled when VSHDN > 2V; connect to IN if unused; series 100kΩ resistor adds reverse-battery protection. |
| 6 (POK) | Power-OK flag | Open-drain output pulled low when VOUT < 2.97V or during shutdown; requires external pull-up resistor for logic-level signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 3.5µA at 12V input - reduces battery drain by >90% versus typical 50–100µA LDOs, enabling multi-year operation in smoke detectors. |
| Integrated reverse-battery protection | Sub-1mA reverse leakage at VIN = –12V - eliminates need for external blocking diode and preserves battery capacity during accidental reversal. |
| Factory-trimmed 3.3V output | ±1.5% accuracy over full temperature range - guarantees compliance with 3.3V I/O standards without calibration or trimming. |
| Thermal and short-circuit protection | Auto-recovering thermal shutdown (160°C) and foldback current limit - enables robust operation in unventilated enclosures and fault-prone systems. |
| Power-OK (POK) monitor | Open-drain output with 1.5% hysteresis - simplifies system-level power sequencing and brown-out detection without external comparators. |
Applications
| Smoke Detectors | Battery-Powered Alarms |
|---|---|
Use Scenario: Standby operation for >5 years on two AA alkaline cells, with periodic self-test and audible alarm activation. IC Role / Device Role / Timing Role: Primary 3.3V power rail regulator supplying MCU, sensor interface, and piezo driver. Use Value: 3.5µA quiescent current directly extends battery life beyond UL 217 certification requirements for 10-year detector lifespan. | Use Scenario: Wireless CO/methane alarm with RF transmission every 5 minutes and wake-on-event capability. IC Role / Device Role / Timing Role: Always-on LDO powering real-time clock, sensor bias, and RF transceiver sleep mode. Use Value: Reverse-battery protection prevents field failures from user-inserted batteries, while POK enables automatic low-battery alert generation. |
| Remote Transmitters | Smart Battery Packs |
Use Scenario: Sub-GHz key fob transmitting encrypted status every 30 seconds with motion-triggered burst mode. IC Role / Device Role / Timing Role: Stable 3.3V supply for ASK/OOK modulator IC and microcontroller during transmit bursts. Use Value: 100mV dropout at 50mA allows full transmit power even as battery voltage decays to 3.4V, maintaining link budget. | Use Scenario: Rechargeable Li-ion pack with fuel gauge, protection IC, and host communication interface. IC Role / Device Role / Timing Role: Auxiliary LDO generating 3.3V for SMBus/I²C interface and EEPROM from main pack voltage. Use Value: Input range up to 12V supports 3S Li-ion (12.6V max) and enables single-LDO solution across multiple cell configurations. |
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 |
|---|---|---|---|
| TPS78233DRVR | 2.5µA IQ, 150mA output, 2% accuracy, 6-pin WSON package | Lacks reverse-battery protection and POK output; requires external enable pull-up | Select when lowest possible quiescent current is prioritized over fault monitoring and reverse polarity resilience. |
| MCP1703T-3302E/MB | 2.5µA IQ, 250mA output, ±2% accuracy, SOT23-5 package (no POK) | 5-pin package omits POK function; no reverse-battery protection; higher output tolerance | Choose when board space is constrained and POK functionality is handled externally or omitted. |
Compared with MAX8881EUT30, TPS78233DRVR offers lower IQ but sacrifices reverse-battery resilience and fault signaling, while MCP1703T-3302E/MB trades POK and protection for higher output current and smaller footprint - making MAX8881EUT30 optimal where integrated safety and diagnostics are mandatory.
Availability
MAX8881EUT30 is available at Aetrix Electronics and suitable for smoke detectors, battery-powered alarms, remote transmitters, smart battery packs, and CMOS backup power systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MAX8881EUT30 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 delivers ultra-low-IQ LDOs with integrated protection features specifically for battery-critical systems where longevity, reliability, and fault awareness are non-negotiable.
FAQ
What is the maximum input voltage rating for MAX8881EUT30?
The MAX8881EUT30 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 per the Absolute Maximum Ratings table.
Does MAX8881EUT30 require external components to set its 3.3V output?
No, MAX8881EUT30 does not require external components to set its 3.3V output. The device uses internal precision feedback resistors; the FB pin is internally tied to OUT, eliminating the need for external dividers - only input and output capacitors (1µF and 4.7µF respectively) are required for stable operation.
How does the POK output of MAX8881EUT30 behave during normal regulation?
During normal regulation, the POK output of MAX8881EUT30 remains in high-impedance (open-drain) state - it neither sources nor sinks current. An external pull-up resistor is required to establish a logic-high level; POK only pulls low when VOUT falls below 90% of nominal (2.97V) or during shutdown.
Can MAX8881EUT30 be used with lithium coin-cell batteries?
Yes, MAX8881EUT30 can be used with lithium coin-cell batteries such as CR2032 (nominal 3.0V, max 3.6V), as its minimum input voltage is 2.5V and dropout at 3.3V output is only 100mV - allowing regulation down to ~3.4V input. However, ensure load current stays within 200mA and output capacitor meets ESR requirements for stability.
Is thermal shutdown recovery automatic in MAX8881EUT30?
Yes, MAX8881EUT30 features automatic thermal shutdown recovery: when junction temperature exceeds 160°C, the regulator shuts down; it resumes normal operation once temperature falls by 15°C (to ~145°C), resulting in pulsed output under sustained overload - no external reset or intervention is needed for MAX8881EUT30 to recover.
MAX8881EUT30 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):
- 3V
- 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
MAX8881EUT30 FAQ
1.How can I place an order for MAX8881EUT30 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8881EUT30 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 MAX8881EUT30 reliable?
The price and inventory of MAX8881EUT30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8881EUT30 is usually 5 days.
3.What payment methods are accepted for MAX8881EUT30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8881EUT30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8881EUT30?
MAX8881EUT30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8881EUT30 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 MAX8881EUT30?
For technical support, including MAX8881EUT30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8881EUT30 requirements.
6.How does Aetrix verify that MAX8881EUT30 is sourced from the original manufacturer or authorized distributors?
All MAX8881EUT30 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 MAX8881EUT30 meets industry standards.
7.What is the process for return or replacement of MAX8881EUT30?
All MAX8881EUT30 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8881EUT30, 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 MAX8881EUT30 part is unused and in its original packaging.
Return procedure for MAX8881EUT30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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