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Analog Devices Inc./Maxim Integrated MAX8877EUK42+
- Part No.:
- MAX8877EUK42+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK42+.pdf
- Description:
- IC REG LINEAR LOW NOISE LDO
- Quantity:
- Payment:
- Shipping:
Inventory:65,670
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Product details
Overview
MAX8877EUK42+ from Maxim Integrated is a low-noise, low-dropout linear regulator with 4.2V preset output, 150mA maximum 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 precision voltage source in battery-powered handheld instruments and portable communication devices.
For engineers reviewing the MAX8877EUK42+ datasheet, MAX8877EUK42+ pinout, MAX8877EUK42+ application, or MAX8877EUK42+ equivalent, key selection criteria include dropout performance at 150mA, shutdown current (10nA), output voltage accuracy (±1.4%), thermal protection behavior, and BP-capacitor–dependent noise reduction.
Technical Context
The MAX8877EUK42+ employs a 1.25V bandgap reference and error amplifier driving a 1.1Ω typical P-channel MOSFET pass transistor, enabling stable regulation without base-drive current loss. Its feedback network is fully internal, with no external resistor divider required.
It integrates reverse-battery protection limiting reverse current to 1mA, thermal shutdown at +155°C with 15°C hysteresis, and short-circuit protection sustaining infinite-duration output shorts. The BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter that reduces reference noise, directly lowering output voltage noise to 30µVRMS (10Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.2V ±1.4% - factory-preset, eliminates external feedback resistors and ensures tight tolerance across -40°C to +85°C. |
| Max Output Current | 150mA - supports moderate-power analog/digital loads such as RF front-ends or microcontroller cores without derating. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 4.365V, extending usable battery life in single-cell Li-ion systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved via 0.01µF BP capacitor; suitable for noise-sensitive ADC references and RF power amplifiers. |
| Quiescent Current | 100µA at full load and in dropout - constant across load and input conditions, optimizing standby efficiency in always-on subsystems. |
| Shutdown Current | 10nA - enables ultra-low-power system sleep modes; SHDN pin is active-low with 0.4V logic threshold. |
| Thermal Protection | Shuts down at +155°C with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
MAX8877EUK42+ is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with exposed pad not electrically connected. The GND pin serves dual roles: circuit return and primary thermal path - requires soldering to a large copper area for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient immunity. |
| 2 - GND | Ground reference and thermal sink | Must be connected to large PCB copper area to maintain junction temperature ≤+150°C at full load. |
| 3 - SHDN | Active-low enable control | Pulls output off when <0.4V; draws ≤0.5µA at +85°C; connects to IN for always-on operation. |
| 4 - BP | Bypass node for reference noise filtering | Connects to 0.01µF ceramic capacitor; forms 80Hz RC filter - critical for achieving 30µVRMS noise spec. |
| 5 - OUT | Regulated output terminal | Delivers up to 150mA; requires ≥1µF (ESR <0.2Ω) ceramic capacitor for VOUT ≥2.5V; stable with COUT ESR 0.01–10Ω. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss - maintains 100µA IQ regardless of load or dropout condition, unlike PNP-based regulators. |
| Reverse battery protection | Clamps reverse current to ≤1mA when IN or SHDN falls below GND - prevents damage in miswired battery compartments. |
| Internal current limit | Guarantees ≥160mA minimum trip point - protects against overloads while allowing safe 150mA continuous operation. |
| Thermal shutdown with hysteresis | Re-enables output only after 15°C cooldown - avoids oscillatory shutdown/restart during marginal thermal conditions. |
| Pin-compatible with '2982 family | Enables drop-in replacement in legacy designs using LM2982 or equivalent, preserving PCB layout and bill-of-materials. |
Applications
| Hand-Held Instruments | Cellular Telephones |
|---|---|
|
Use Scenario: Portable multimeter or spectrum analyzer requiring clean 4.2V rail for high-resolution ADC and analog front-end. IC Role / Device Role / Timing Role: Primary low-noise voltage source for signal chain components, replacing switching regulators to avoid switching noise coupling. Use Value: 30µVRMS noise and 165mV dropout allow direct use of partially depleted Li-ion cells while preserving 16-bit ADC ENOB. |
Use Scenario: RF power amplifier bias supply in GSM/EDGE handset transceivers. IC Role / Device Role / Timing Role: Stable 4.2V bias generator decoupled from noisy digital supply domains via dedicated LDO. Use Value: PSRR of 63dB at low frequencies suppresses baseband noise from PMU rails, reducing spectral regrowth. |
| PCMCIA Cards | Electronic Planners |
|
Use Scenario: Compact PCMCIA modem card needing regulated 4.2V for analog line-driver ICs and flash memory interface. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating sensitive analog circuitry from host bus noise and transient loading. Use Value: 100µA quiescent current extends suspend-mode battery life; 10nA shutdown current enables deep-sleep states. |
Use Scenario: Battery-powered PDA or organizer with real-time clock, touch controller, and LCD driver sharing a 4.2V domain. IC Role / Device Role / Timing Role: Single-rail power source for mixed-signal peripherals requiring consistent voltage despite varying load profiles. Use Value: Load regulation of 0.01%/mA ensures stable display contrast and accurate RTC timing across battery discharge curve. |
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 |
|---|---|---|---|
| MAX8878EUK42+ | Includes auto-discharge function (300Ω pull-down on OUT during shutdown); otherwise identical specs and pinout. | Required where rapid output discharge is needed to meet system-level safety or sequencing requirements. | Select MAX8878EUK42+ only if active discharge is mandatory; MAX8877EUK42+ is preferred for lowest BOM cost and zero discharge leakage. |
| MCP1700T-4202E/TT | Lower max current (250mA), higher dropout (290mV @ 250mA), higher noise (60µVRMS), no BP pin or reverse-battery protection. | Suitable for cost-sensitive, non-battery-critical applications where 4.2V accuracy and ultra-low noise are secondary. | Choose MCP1700T-4202E/TT only if thermal margin is ample and noise/robustness requirements are relaxed. |
Compared with MAX8877EUK42+, the MAX8878EUK42+ adds functional value only in discharge-critical systems, while the MCP1700T-4202E/TT trades noise performance, protection features, and dropout for lower unit cost and higher current - making it a functional but not drop-in alternative.
Availability
MAX8877EUK42+ is available at Aetrix Electronics and suitable for hand-held instruments, cellular telephones, and PCMCIA cards requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8877EUK42+ 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 demanding industrial, communications, and consumer applications.
The MAX8877/MAX8878 product line was designed specifically for battery-powered portable electronics requiring ultra-low noise, minimal quiescent current, and robust fault protection - targeting space-constrained, energy-sensitive systems.
FAQ
What is the exact output voltage tolerance of the MAX8877EUK42+ across temperature and load?
The MAX8877EUK42+ guarantees ±1.4% output voltage accuracy over -40°C to +85°C and 0.1mA to 120mA load range for VOUT ≥2.5V. At +25°C and 0.1mA load, tolerance tightens to ±1.4% (not ±1%). This specification is production-tested and applies directly to the MAX8877EUK42+ - no binning or external calibration is required to meet this spec.
Does the MAX8877EUK42+ require an external BP capacitor to achieve its specified 30µVRMS noise?
Yes - the MAX8877EUK42+ requires a 0.01µF ceramic capacitor between BP and GND to achieve its 30µVRMS output noise rating (10Hz–100kHz). Omitting or substituting this capacitor increases noise significantly; values >0.1µF degrade startup time without further noise benefit and are not recommended per the MAX8877EUK42+ datasheet.
Can the MAX8877EUK42+ be used with input voltages below 2.5V?
No - the absolute minimum input voltage for the MAX8877EUK42+ is 2.5V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Operation below 2.5V is undefined and may result in regulation failure, increased dropout, or erratic behavior. For sub-2.5V inputs, consider alternative regulators such as the MAX8860 series.
Is the MAX8877EUK42+ pin-compatible with the LM2982 series?
Yes - the MAX8877EUK42+ is explicitly designed as a pin-compatible upgrade to the industry-standard LM2982 family. It shares identical SOT23-5 pinout (IN, GND, SHDN, BP, OUT), same footprint, and compatible voltage/current ratings - enabling direct replacement without PCB modification.
What thermal derating applies to the MAX8877EUK42+ in SOT23-5 regular package?
The MAX8877EUK42+ in SOT23-5 regular package has a thermal derating factor of 7.1mW/°C above +70°C ambient. Its maximum continuous power dissipation is 571mW at +70°C. To sustain full 150mA output at elevated ambient temperatures, the PCB must provide adequate copper area on the GND pin to maintain junction temperature ≤+150°C.
MAX8877EUK42+ 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):
- 4.2V
- 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
MAX8877EUK42+ FAQ
1.How can I place an order for MAX8877EUK42+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK42+ 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 MAX8877EUK42+ reliable?
The price and inventory of MAX8877EUK42+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK42+ is usually 5 days.
3.What payment methods are accepted for MAX8877EUK42+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK42+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK42+?
MAX8877EUK42+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK42+ 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 MAX8877EUK42+?
For technical support, including MAX8877EUK42+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK42+ requirements.
6.How does Aetrix verify that MAX8877EUK42+ is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK42+ 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 MAX8877EUK42+ meets industry standards.
7.What is the process for return or replacement of MAX8877EUK42+?
All MAX8877EUK42+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK42+, 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 MAX8877EUK42+ part is unused and in its original packaging.
Return procedure for MAX8877EUK42+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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