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Analog Devices Inc./Maxim Integrated MAX8867EUK27-T
- Part No.:
- MAX8867EUK27-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK27-T.pdf
- Description:
- IC REG LINEAR LOW NOISE LDO
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX8867EUK27-T from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.7V preset output voltage, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load. It uses an internal P-channel MOSFET pass transistor and operates from 2.5V to 6.5V input, targeting battery-powered handheld instruments and PCMCIA cards.
For engineers reviewing the MAX8867EUK27-T datasheet, MAX8867EUK27-T pinout, MAX8867EUK27-T application, or MAX8867EUK27-T equivalent, key selection criteria include output noise performance, shutdown current (10nA), thermal/short-circuit protection, reverse battery protection, and SOT23-5 package compatibility with MAX8863/MAX8864 footprints.
Technical Context
The MAX8867EUK27-T implements a 1.25V bandgap reference and error amplifier driving a 1.1Ω typical P-channel MOSFET pass transistor, enabling ultra-low quiescent current (100µA) independent of load or dropout condition. Its BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter that reduces output noise to 30µVRMS.
It integrates reverse battery protection limiting reverse supply current to 1mA, thermal shutdown at +155°C with 15°C hysteresis, and current limiting set to 160–390mA. The device lacks auto-discharge (exclusive to MAX8868), and its SHDN pin is active-low with 0.4V logic threshold and 0.5µA bias current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.7V ±1.4% - factory-preset, stable over -40°C to +85°C and 0–150mA load |
| Max Output Current | 150mA - guaranteed continuous output without thermal shutdown under proper PCB layout |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 2.865V for 2.7V output, extending battery life |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved with 0.01µF BP capacitor, critical for RF and precision analog circuits |
| Quiescent Current | 100µA - constant across load, dropout, and temperature, minimizing standby power loss |
| Shutdown Current | 10nA - enables multi-year battery operation in always-off states |
| Input Voltage Range | 2.5V to 6.5V - supports single Li-ion, dual Alkaline/NiMH, and regulated intermediate rails |
Pinout & Package
SOT23-5 regular package (JEDEC MO-178AA), 5-pin surface-mount with GND pin acting as thermal pad; requires soldering to large copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable control | Pulled low to enter 10nA shutdown; tied to IN for always-on operation; 0.4V logic threshold |
| 2 - GND | Power ground & thermal path | Electrical reference and primary heat dissipation path; must connect to large PCB ground plane |
| 3 - IN | Regulator input | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to suppress supply noise and ensure stability |
| 4 - OUT | Regulated output | Delivers up to 150mA; requires ≥1µF low-ESR capacitor (X7R/X5R ceramic recommended) |
| 5 - BP | Noise-reduction bypass | Connects to 0.01µF ceramic capacitor to reduce output noise; not present on MAX8863/64 |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise with 0.01µF BP cap - meets requirements for sensitive RF receivers and ADC references |
| P-channel MOSFET architecture | 100µA load-independent quiescent current - eliminates base-drive losses seen in PNP-based LDOs |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN < 0V - prevents damage during battery insertion errors |
| Thermal & short-circuit protection | +155°C shutdown with +15°C hysteresis and indefinite short-circuit tolerance - ensures robust field reliability |
| Preset voltage accuracy | ±1.4% over -40°C to +85°C - eliminates external resistor network, reducing BOM count and layout area |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by two AA batteries with variable load profiles. IC Role / Device Role / Timing Role: Primary 2.7V supply for microcontroller, display driver, and precision ADC front-end. Use Value: 30µVRMS noise ensures clean reference for 16-bit ADC conversions; 100µA quiescent current extends battery life beyond 12 months in sleep mode. |
Use Scenario: Hot-pluggable memory or modem PCMCIA cards requiring regulated 2.7V rail during card insertion/removal transients. IC Role / Device Role / Timing Role: Local LDO supplying FPGA configuration logic and interface buffers. Use Value: Reverse battery protection prevents latch-up during misaligned insertion; 165mV dropout allows operation until battery drops to 2.865V. |
| Cordless Telephones | Electronic Planners |
Use Scenario: Base station and handset subsystems where RF sensitivity demands ultra-low power-supply noise. IC Role / Device Role / Timing Role: Clean 2.7V supply for IF amplifiers and PLL VCO tuning circuits. Use Value: 63dB PSRR at low frequencies suppresses switching noise from DC-DC converters; BP pin filtering eliminates broadband noise coupling into RF stages. |
Use Scenario: Battery-backed PDAs with real-time clock, SRAM, and touch-screen controller requiring stable low-power supply. IC Role / Device Role / Timing Role: Always-on 2.7V rail for RTC and backup memory retention during main system shutdown. Use Value: 10nA shutdown current enables >5-year battery retention life; ±1.4% output accuracy maintains RTC timing integrity across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8863EUK27-T | Same SOT23-5 footprint but lacks BP pin and achieves 50µVRMS noise; 120mV dropout at 150mA; no reverse battery protection | Lower-cost option where noise < 50µVRMS is acceptable and reverse polarity risk is mitigated externally | Select MAX8863EUK27-T only if BP-related noise reduction is unnecessary and board space allows external reverse-protection diode |
| MCP1700T-2702E/TT | 250mA output, 175mV dropout at 250mA, 30µVRMS noise, no BP pin, no reverse battery protection, 1.6µA quiescent current | Better current capability but higher dropout and missing reverse-battery safety; requires external protection for battery-reversal scenarios | Choose MCP1700T-2702E/TT only for higher-current loads where reverse-battery risk is eliminated by system-level design |
Compared with MAX8867EUK27-T, MAX8863EUK27-T trades noise performance and safety features for cost, while MCP1700T-2702E/TT offers higher current but sacrifices reverse-battery protection and pin compatibility - making MAX8867EUK27-T optimal for space-constrained, safety-critical, low-noise battery systems.
Availability
MAX8867EUK27-T is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, cordless telephones, and electronic planners requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for MAX8867EUK27-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 communication applications.
The MAX8867 series targets portable battery-powered systems needing ultra-low noise, low quiescent current, and integrated protection - emphasizing reliability in consumer and industrial handheld equipment.
FAQ
What is the exact output voltage tolerance of the MAX8867EUK27-T over temperature and load?
The MAX8867EUK27-T delivers 2.7V output with ±1.4% accuracy across the full operating range of -40°C to +85°C and 0mA to 150mA load. This specification is production-tested at +25°C and guaranteed over temperature via Statistical Quality Control correlation, ensuring consistent performance in battery-powered environments where voltage drift impacts system functionality.
Does the MAX8867EUK27-T include auto-discharge functionality during shutdown?
No, the MAX8867EUK27-T does not include auto-discharge. That feature is exclusive to the MAX8868 family (e.g., MAX8868EUK27-T). When the MAX8867EUK27-T enters shutdown via the SHDN pin, the output remains floating at its last regulated voltage; external discharge circuitry is required if rapid output decay is needed.
What capacitor values are mandatory for stable operation of the MAX8867EUK27-T?
For stable operation, the MAX8867EUK27-T requires a minimum 1µF X7R or X5R ceramic capacitor on the OUT pin (≤0.2Ω ESR) and a 1µF capacitor on the IN pin. A 0.01µF ceramic capacitor must be placed on the BP pin to achieve the specified 30µVRMS noise. Using Z5U/Y5V dielectrics may require ≥2.2µF for stability below -10°C.
How does reverse battery protection work in the MAX8867EUK27-T?
The MAX8867EUK27-T monitors polarity on both IN and SHDN pins; if either falls below ground, internal circuitry disconnects parasitic paths and limits reverse current to ≤1mA. This prevents damage during incorrect battery installation and eliminates need for external series diodes, preserving efficiency and board space in compact battery compartments.
Is the MAX8867EUK27-T pin-compatible with the MAX8863 series?
Yes, the MAX8867EUK27-T is pin-compatible with the MAX8863EUK27-T in SOT23-5 packages, except for the BP pin (pin 5), which is a no-connect on MAX8863. This allows drop-in replacement where noise reduction is added, but requires PCB layout verification to ensure BP pin is properly terminated per MAX8867 requirements.
MAX8867EUK27-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 63dB (10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX8867EUK27-T FAQ
1.How can I place an order for MAX8867EUK27-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK27-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 MAX8867EUK27-T reliable?
The price and inventory of MAX8867EUK27-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK27-T is usually 5 days.
3.What payment methods are accepted for MAX8867EUK27-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK27-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK27-T?
MAX8867EUK27-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK27-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 MAX8867EUK27-T?
For technical support, including MAX8867EUK27-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK27-T requirements.
6.How does Aetrix verify that MAX8867EUK27-T is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK27-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 MAX8867EUK27-T meets industry standards.
7.What is the process for return or replacement of MAX8867EUK27-T?
All MAX8867EUK27-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK27-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 MAX8867EUK27-T part is unused and in its original packaging.
Return procedure for MAX8867EUK27-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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