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Analog Devices Inc./Maxim Integrated MAX8877EUK26+
- Part No.:
- MAX8877EUK26+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK26+.pdf
- Description:
- IC REG LINEAR LOW NOISE LDO
- Quantity:
- Payment:
- Shipping:
Inventory:89,534
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Product details
Overview
MAX8877EUK26+ from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.6V preset output voltage, 150mA maximum output current, 165mV dropout at full load, and 30µVRMS output noise. It uses an internal P-channel MOSFET pass transistor, delivers 100µA operating supply current independent of load or dropout, and features logic-controlled shutdown (10nA) for battery-powered portable electronics.
For engineers reviewing the MAX8877EUK26+ datasheet, MAX8877EUK26+ pinout, MAX8877EUK26+ application, or MAX8877EUK26+ equivalent, key selection criteria include output voltage accuracy (±1.4%), thermal shutdown (155°C), reverse battery protection, and SOT23-5 regular package compatibility with industry-standard '2982 footprint.
Technical Context
The MAX8877EUK26+ employs a 1.25V bandgap reference and error amplifier driving a 1.1Ω typical P-channel MOSFET pass transistor, enabling ultra-low quiescent current across all operating conditions. Its BP pin integrates a 200kΩ resistor with external 0.01µF capacitor to form an 80Hz low-pass filter for noise reduction.
Shutdown is active-low on SHDN pin, disabling regulation and reducing supply current to 10nA; the MAX8877EUK26+ variant lacks auto-discharge (unlike MAX8878), so output remains floating in shutdown. Protection includes thermal shutdown (155°C with 15°C hysteresis), short-circuit current limiting (160–390mA), and reverse battery protection limiting reverse current to 1mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.6V ±1.4% - factory-preset, stable over -40°C to +85°C and 0.1–120mA load range. |
| Max Output Current | 150mA - supports moderate-power analog/digital loads without external boost circuitry. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 2.76V, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved with 0.01µF BP capacitor; suitable for noise-sensitive RF, ADC, or PLL power domains. |
| Quiescent Current | 100µA - constant across load and dropout, critical for multi-day standby in handheld instruments. |
| Shutdown Current | 10nA - enables true zero-power sleep mode when SHDN is pulled low. |
| Input Voltage Range | 2.5V to 6.5V - compatible with single-cell Li-ion (2.7–4.2V), two-cell alkaline (2.4–3.2V), and regulated 3.3V/5V rails. |
Pinout & Package
MAX8877EUK26+ is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with exposed pad not electrically connected. The GND pin serves dual function as electrical ground and thermal path; soldering to a large PCB copper area improves thermal performance and power dissipation up to 571mW at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient rejection. |
| 2 GND | Ground reference and thermal sink | Must connect to PCB ground plane; primary heat conduction path-critical for thermal reliability at >50mA loads. |
| 3 SHDN | Active-low enable control | Pull low (≤0.4V) to enter 10nA shutdown; pull high (≥2.0V) or tie to IN for normal operation. |
| 4 BP | Bypass for reference noise reduction | Connect 0.01µF ceramic capacitor to GND; forms 80Hz RC filter to suppress reference noise before error amp. |
| 5 OUT | Regulated output | Delivers 2.6V @ up to 150mA; requires ≥1µF (ESR <0.2Ω) ceramic capacitor for VOUT ≥2.5V stability. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss-enables 100µA IQ regardless of load or dropout condition. |
| Reverse battery protection | Clamps reverse current to ≤1mA if VIN or SHDN falls below GND, preventing damage in miswired battery compartments. |
| Thermal shutdown with hysteresis | Shuts down at 155°C junction temperature and re-enables only after cooling by 15°C-prevents latch-up during sustained overload. |
| 1.4% output voltage accuracy | Guaranteed over -40°C to +85°C and 0.1–120mA load-reduces need for post-regulation trimming in precision analog supplies. |
| Industry-standard '2982 pinout | Enables drop-in replacement for legacy designs using LM2982 or similar regulators without PCB layout changes. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering RF transceiver bias circuits and baseband analog sections in GSM/CDMA handsets with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Low-noise 2.6V supply for VCO tuning voltage and ADC reference, minimizing phase noise and quantization error. Use Value: 30µVRMS noise and 165mV dropout extend talk time by enabling operation down to 2.76V battery voltage while preserving signal integrity. |
Use Scenario: Providing regulated 2.6V to smart-card interface logic and EEPROM in PCMCIA Type II expansion cards. IC Role / Device Role / Timing Role: Primary LDO for I/O voltage domain, supporting hot-plug detection and 3.3V-to-2.6V level translation. Use Value: 10nA shutdown current allows complete power gating during card idle states, meeting PCMCIA power budget constraints. |
| Hand-Held Instruments | Electronic Planners |
|
Use Scenario: Supplying precision op-amps and 16-bit SAR ADCs in portable multimeters and data loggers powered by AA batteries. IC Role / Device Role / Timing Role: Stable 2.6V rail for analog front-end and reference buffer, rejecting ripple from switching charge pumps. Use Value: ±1.4% output accuracy and <0.04%/mA load regulation ensure measurement repeatability across battery discharge curve. |
Use Scenario: Powering real-time clock (RTC), SRAM backup, and touch-screen controller in palm-sized PDAs with coin-cell backup. IC Role / Device Role / Timing Role: Always-on LDO for RTC domain, maintaining timekeeping during main system shutdown. Use Value: 100µA quiescent current enables >1-year coin-cell lifetime when paired with low-leakage 0.01µF BP capacitor. |
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 |
|---|---|---|---|
| MAX8878EUK26+ | Includes auto-discharge function (300Ω discharge path); otherwise identical specs and pinout. | Required where rapid output discharge is needed during shutdown (e.g., to prevent back-powering downstream logic). | Select MAX8878EUK26+ only if auto-discharge is explicitly required; MAX8877EUK26+ is preferred for zero-load leakage in always-on RTC rails. |
| Torex XC6206P262MR-G | 2.6V fixed output, 150mA, but higher 250mV dropout at 150mA and 45µVRMS noise; SOT23-5 pinout differs (IN/GND/EN/OUT). | Not pin-compatible; requires PCB redesign. Lacks reverse battery and thermal protection. | Consider only for cost-sensitive, non-safety-critical applications where 155°C thermal shutdown and reverse polarity robustness are unnecessary. |
Compared with MAX8877EUK26+, MAX8878EUK26+ adds auto-discharge at no cost to noise or efficiency, while XC6206P262MR-G trades protection features and precision for lower unit price-but demands layout revision and careful system-level fault analysis.
Availability
MAX8877EUK26+ is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, hand-held instruments, and electronic planners requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8877EUK26+ 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 quiescent current, low noise, and robust protection-targeting cellular telephones, palmtop computers, and handheld test equipment.
FAQ
What is the output voltage tolerance of MAX8877EUK26+ over temperature and load?
The MAX8877EUK26+ guarantees ±1.4% output voltage accuracy across -40°C to +85°C ambient temperature and 0.1mA to 120mA load current. At +25°C and 0.1mA load, typical deviation is ±1.0%; worst-case drift over full conditions remains within the ±1.4% bound per datasheet Electrical Characteristics table, ensuring reliable operation in unregulated battery systems.
Does MAX8877EUK26+ require an external BP capacitor, and what value is recommended?
Yes, MAX8877EUK26+ requires a 0.01µF ceramic capacitor between BP pin and GND to achieve its specified 30µVRMS output noise. This capacitor forms a low-pass filter with an internal 200kΩ resistor. Values above 0.1µF increase startup time without improving noise; values below 0.01µF degrade noise performance. X7R or C0G dielectrics are recommended for stable capacitance across temperature.
Can MAX8877EUK26+ be used with input voltages below 2.5V?
No-MAX8877EUK26+ has a minimum input voltage rating of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V is undefined and may result in regulation loss, increased noise, or failure to start. For sub-2.5V inputs, consider alternative LDOs such as the MAX8860 series with 1.6V min VIN.
How does the thermal shutdown feature operate in MAX8877EUK26+?
MAX8877EUK26+ activates thermal shutdown at 155°C junction temperature, turning off the pass transistor until the die cools by 15°C (to ~140°C), then automatically resumes regulation. This hysteresis prevents oscillation during sustained overload. The GND pin must be soldered to a sufficient copper area to maintain θJB = 140°C/W and avoid premature shutdown under 150mA load at elevated ambient temperatures.
Is MAX8877EUK26+ pin-compatible with the LM2982 series?
Yes-MAX8877EUK26+ is explicitly designed as a pin-compatible upgrade to the industry-standard LM2982 family. Pin assignments (IN, GND, SHDN, BP, OUT) match the '2982 footprint, and electrical characteristics-including dropout, noise, and shutdown behavior-are improved. No PCB changes are required for drop-in replacement in existing designs.
MAX8877EUK26+ 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):
- 2.6V
- 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
MAX8877EUK26+ FAQ
1.How can I place an order for MAX8877EUK26+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK26+ 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 MAX8877EUK26+ reliable?
The price and inventory of MAX8877EUK26+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK26+ is usually 5 days.
3.What payment methods are accepted for MAX8877EUK26+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK26+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK26+?
MAX8877EUK26+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK26+ 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 MAX8877EUK26+?
For technical support, including MAX8877EUK26+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK26+ requirements.
6.How does Aetrix verify that MAX8877EUK26+ is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK26+ 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 MAX8877EUK26+ meets industry standards.
7.What is the process for return or replacement of MAX8877EUK26+?
All MAX8877EUK26+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK26+, 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 MAX8877EUK26+ part is unused and in its original packaging.
Return procedure for MAX8877EUK26+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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