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Analog Devices Inc./Maxim Integrated MAX8877EUK29-T
- Part No.:
- MAX8877EUK29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK29-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX8877EUK29-T from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.84V preset output, 150mA max output current, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current. It uses an internal P-channel MOSFET pass device and operates from 2.5V to 6.5V input, serving as a stable voltage source in space-constrained battery-powered systems such as handheld instruments and PCMCIA cards.
For engineers reviewing the MAX8877EUK29-T datasheet, MAX8877EUK29-T pinout, MAX8877EUK29-T application, or MAX8877EUK29-T equivalent, key selection criteria include guaranteed ±1.4% output accuracy over -40°C to +85°C, reverse battery protection, thermal shutdown at 155°C, 10nA logic-controlled shutdown, and compatibility with standard '2982 footprint for drop-in replacement in legacy designs.
Technical Context
The MAX8877EUK29-T implements a bandgap-referenced 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 connects to an internal 200kΩ resistor forming an 80Hz low-pass filter with a 0.01µF external capacitor, directly reducing reference noise contribution to output.
Shutdown control is active-low on SHDN, pulling supply current to 10nA while maintaining reverse battery protection and thermal/short-circuit safeguards. Unlike the MAX8878 variant, the MAX8877EUK29-T lacks auto-discharge functionality - output remains floating during shutdown, preserving hold-up capacitance for fast wake-up sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.84V ±1.4% (factory-preset; no external resistors required) |
| Max Output Current | 150mA continuous; current limit activates at ≥160mA (min) |
| Dropout Voltage | 165mV at 150mA load (enables operation down to 3.005V input) |
| Output Noise | 30µVRMS (10Hz–100kHz, with 0.01µF BP cap and 10µF COUT) |
| Quiescent Current | 100µA across full load range and dropout - enables >1-year battery life in 10µA standby systems |
| Shutdown Current | 10nA (logic-low SHDN); preserves battery charge during extended sleep |
| Operating Temp | -40°C to +85°C (industrial-grade qualification; junction limited to +150°C) |
Pinout & Package
MAX8877EUK29-T is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with GND pin acting as both electrical return and thermal path. PCB layout requires direct connection of GND to a large copper pour for thermal management and stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for line-transient immunity |
| 2 - GND | Ground reference and thermal sink | Must be soldered to ≥25mm² copper area to maintain θJB = 140°C/W and prevent thermal shutdown at full load |
| 3 - SHDN | Active-low enable/disable control | Logic-low (≤0.4V) reduces IQ to 10nA; tie to IN for always-on operation |
| 4 - BP | Bypass for internal reference | Connects to 0.01µF ceramic cap to reduce output noise by filtering reference ripple |
| 5 - OUT | Regulated output | Delivers up to 150mA; requires ≥1µF (VOUT ≥2.5V) or ≥3.3µF (VOUT <2.5V) low-ESR ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss - maintains 100µA IQ even in dropout or heavy-load conditions |
| Reverse battery protection | Blocks >99% of reverse current (<1mA) when VIN or SHDN falls below GND - prevents damage in miswired battery compartments |
| Thermal shutdown with hysteresis | Shuts down at +155°C; restarts only after cooling 15°C - avoids oscillation during sustained overload |
| 100mV-output increment options | 2.84V output (EUK29 suffix) targets precision analog rails where 2.8V or 2.85V are common, avoiding resistor-divider losses |
| '2982 pin-compatible footprint | Enables direct mechanical replacement in existing designs without PCB revision - same pad layout and mounting dimensions |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
|
Use Scenario: Portable multimeter with LCD, microcontroller, and analog front-end powered from single-cell Li-ion. IC Role / Device Role / Timing Role: Primary 2.84V supply for precision ADC reference and op-amp biasing. Use Value: 30µVRMS noise ensures <1 LSB error in 16-bit measurements; 165mV dropout extends usable battery range to 3.005V. |
Use Scenario: Hot-pluggable PCMCIA modem card requiring clean, isolated 2.84V rail for UART and PHY interface. IC Role / Device Role / Timing Role: Local LDO delivering regulated power independent of host bus voltage fluctuations. Use Value: Reverse battery protection prevents latch-up during insertion/removal; 10nA shutdown enables instant suspend/resume. |
| Electronic Planners | Cordless Telephones |
|
Use Scenario: Memory-retentive PDA with real-time clock, flash memory, and touch controller. IC Role / Device Role / Timing Role: Always-on 2.84V supply for RTC backup domain and SRAM retention circuitry. Use Value: 100µA IQ minimizes self-discharge of coin-cell backup; ±1.4% accuracy guarantees timekeeping stability over temperature. |
Use Scenario: Base station power management for dual-band cordless phone with digital signal processor and RF transceiver. IC Role / Device Role / Timing Role: Secondary LDO generating 2.84V for DSP core logic and PLL VCO tuning voltage. Use Value: Low PSRR roll-off above 10kHz avoids coupling switching noise into sensitive RF sections; thermal shutdown protects during enclosure overheating. |
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 |
|---|---|---|---|
| MAX8878EUK29-T | Same pinout and output voltage, but adds active output discharge (300Ω pull-down) during shutdown | Required where rapid output discharge is needed to meet system-level reset timing or avoid back-powering downstream logic | Select MAX8878EUK29-T only if auto-discharge is explicitly required; otherwise MAX8877EUK29-T offers lower BOM cost and identical regulation performance |
| Torex XC6206P282MR-G | 2.8V output (±2%), 100mA max, 250mV dropout at 100mA, 40µVRMS noise, SOT23-5 package | Lower current capability and higher dropout limit use in high-load or low-input-voltage scenarios; no reverse battery protection | Consider only for cost-sensitive, low-current applications where reverse polarity risk is mitigated externally and 150mA headroom is unnecessary |
Compared with MAX8877EUK29-T, the MAX8878EUK29-T adds functional complexity (auto-discharge) without improving regulation specs, while the XC6206P282MR-G trades current capacity, dropout, noise, and protection features for lower unit price - making MAX8877EUK29-T optimal for industrial handhelds requiring robustness, precision, and full 150mA delivery.
Availability
MAX8877EUK29-T is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, electronic planners, and cordless telephones requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature operation.
Supply support for MAX8877EUK29-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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX8877/MAX8878 product line was designed specifically for battery-powered portable electronics requiring ultra-low noise, minimal dropout, and robust fault protection - targeting applications where runtime, signal integrity, and reliability are critical.
FAQ
What is the exact output voltage tolerance of the MAX8877EUK29-T over temperature?
The MAX8877EUK29-T guarantees ±1.4% output voltage accuracy across the full -40°C to +85°C operating range, with tighter ±1.4% tolerance maintained at +25°C. This specification is verified per production test limits and applies to all load currents from 0.1mA to 120mA, ensuring consistent 2.84V rail performance in thermally varying environments without external trimming.
Does the MAX8877EUK29-T require an external BP capacitor to achieve its specified 30µVRMS noise?
Yes - the MAX8877EUK29-T achieves its rated 30µVRMS output noise only when a 0.01µF ceramic capacitor is placed between the BP pin and GND. This capacitor forms a low-pass filter with the internal 200kΩ resistor to suppress reference noise; omitting it increases output noise significantly, and using >0.1µF degrades startup time without further noise reduction.
Can the MAX8877EUK29-T be used with input voltages below 2.5V?
No - the MAX8877EUK29-T has a minimum input voltage rating of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V is not characterized, may cause regulation failure, and risks violating the 2.5V lower bound specified for line regulation, dropout, and ground current tests.
How does the thermal shutdown behavior of the MAX8877EUK29-T affect system reliability?
The MAX8877EUK29-T enters thermal shutdown at +155°C junction temperature and remains off until junction cools by 15°C (to +140°C), providing hysteresis that prevents cycling. This behavior protects against permanent damage during sustained overload or poor PCB heatsinking, and allows safe recovery once ambient conditions improve - critical for unattended portable equipment.
Is the MAX8877EUK29-T pin-compatible with the industry-standard '2982 regulator?
Yes - the MAX8877EUK29-T is explicitly designed as a pin-compatible upgrade to the industry-standard '2982 family, sharing identical SOT23-5 pinout (IN, GND, SHDN, BP, OUT), mechanical footprint, and mounting dimensions. No PCB layout changes are required for drop-in replacement, though design validation should confirm performance alignment with the improved dropout and noise specs.
MAX8877EUK29-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):
- 2.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- -
- 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
MAX8877EUK29-T FAQ
1.How can I place an order for MAX8877EUK29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK29-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 MAX8877EUK29-T reliable?
The price and inventory of MAX8877EUK29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK29-T is usually 5 days.
3.What payment methods are accepted for MAX8877EUK29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK29-T?
MAX8877EUK29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK29-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 MAX8877EUK29-T?
For technical support, including MAX8877EUK29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK29-T requirements.
6.How does Aetrix verify that MAX8877EUK29-T is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK29-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 MAX8877EUK29-T meets industry standards.
7.What is the process for return or replacement of MAX8877EUK29-T?
All MAX8877EUK29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK29-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 MAX8877EUK29-T part is unused and in its original packaging.
Return procedure for MAX8877EUK29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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