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Analog Devices Inc./Maxim Integrated MAX8877EUK30+
- Part No.:
- MAX8877EUK30+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK30+.pdf
- Description:
- IC REG LINEAR 3V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,422
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Product details
Overview
MAX8877EUK30+ from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 3.0V output, delivering up to 150mA from a 2.5V–6.5V input. It features 30µVRMS output noise, 165mV dropout at 150mA, and 100µA operating supply current independent of load or dropout condition. It is used in battery-powered handheld instruments and PCMCIA cards requiring stable, low-noise voltage regulation.
For engineers reviewing the MAX8877EUK30+ datasheet, MAX8877EUK30+ pinout, MAX8877EUK30+ application, or MAX8877EUK30+ equivalent, key selection criteria include dropout performance at full load, shutdown current (10nA), reverse battery protection, BP-capacitor–dependent noise reduction, and SOT23-5 thermal derating limits.
Technical Context
The MAX8877EUK30+ uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low dropout and eliminate base-drive current loss. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
It integrates thermal shutdown (155°C trip, 15°C hysteresis), short-circuit protection, and reverse battery protection that limits reverse current to 1mA. Unlike the MAX8878 variant, it lacks auto-discharge - shutdown places the output in high-impedance state without active discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±1.4% over -40°C to +85°C - ensures stable core logic or analog supply without external feedback components. |
| Max Output Current | 150mA continuous - supports moderate-power microcontrollers, sensors, or RF front-ends in portable devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 3.165V input when powering 3.0V loads, extending usable battery life. |
| Output Noise | 30µVRMS (10Hz–100kHz, CBP = 0.01µF, COUT = 10µF) - suitable for noise-sensitive analog circuits like ADC references or VCOs. |
| Quiescent Current | 100µA at full load and in dropout - maintains efficiency across load range, critical for always-on battery systems. |
| Shutdown Current | 10nA - reduces system standby power to negligible levels; SHDN pin is active-low with 0.4V VIL threshold. |
| Input Voltage Range | 2.5V to 6.5V - compatible with single Li-ion (2.7–4.2V), dual alkaline (3–3.2V), or regulated 5V rails. |
Pinout & Package
MAX8877EUK30+ is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with GND serving as both electrical return and thermal path. The package has θJB = 140°C/W and 571mW max power dissipation 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 be soldered to large PCB copper area to manage thermal dissipation; also serves as return for all internal blocks. |
| 3 SHDN | Active-low enable control | Pulls output high-impedance when ≤0.4V; draws ≤0.5µA at +85°C; no auto-discharge function (distinguishes from MAX8878). |
| 4 BP | Bypass capacitor connection for reference noise filtering | Connects to internal 200kΩ resistor forming 80Hz low-pass filter; 0.01µF ceramic required for 30µVRMS noise spec. |
| 5 OUT | Regulated 3.0V output | Sources up to 150mA; requires ≥1µF ceramic capacitor (ESR < 0.2Ω) for VOUT ≥ 2.5V; stable with 1µF–10µF range. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling constant 100µA IQ across load and dropout - extends battery runtime vs. PNP-based regulators. |
| Reverse battery protection | Limiting reverse current to 1mA when VIN or SHDN falls below GND - prevents damage during incorrect battery insertion in portable equipment. |
| Thermal shutdown with hysteresis | Trips at +155°C and re-enables only after cooling by 15°C - provides safe, self-recovering fault protection under sustained overload. |
| Pin-compatible with industry-standard '2982 | Enables drop-in replacement in legacy designs using LM2982 or similar SOT23-5 LDOs without PCB changes. |
| Factory-preset 3.0V output | ±1.4% accuracy over temperature and load eliminates external resistor network - reduces BOM count and layout area. |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by two AA/AAA cells with variable voltage decay from 3.2V to 2.7V. IC Role / Device Role / Timing Role: Primary 3.0V supply for microcontroller, ADC, and LCD driver - maintaining regulation through battery end-of-life. Use Value: 165mV dropout allows >10% longer operational time versus higher-dropout LDOs; 30µVRMS noise avoids ADC quantization errors. |
Use Scenario: Credit card–sized modems or memory adapters inserting into laptop PCMCIA slots with noisy 3.3V rail. IC Role / Device Role / Timing Role: Local 3.0V clean supply for UART transceivers and flash memory interface - isolating digital noise from host bus. Use Value: 63dB PSRR at low frequencies suppresses host-supply ripple; 100µA IQ minimizes slot power draw during sleep states. |
| Palmtop Computers | Electronic Planners |
Use Scenario: Early PDAs with ARM7-based SoCs requiring tightly regulated 3.0V I/O and core voltage domains. IC Role / Device Role / Timing Role: Secondary LDO supplying 3.0V to SD card interface and touch controller - decoupled from main DC-DC converter. Use Value: 10nA shutdown current enables zero-power suspend mode; reverse battery protection guards against user-insertion faults. |
Use Scenario: Battery-backed scheduling devices using CR2032 coin cells with limited capacity and high internal resistance. IC Role / Device Role / Timing Role: Always-on 3.0V regulator for real-time clock and SRAM retention - operating continuously for months on single cell. Use Value: 100µA IQ ensures >1-year battery life; thermal shutdown prevents overheating during accidental short-circuit events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-dropout LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8860EUK30+ | Same 3.0V output, but 50mA max current and 25µVRMS noise; uses N-channel pass device requiring higher bias current in dropout. | Lower current capability suits ultra-low-power sensor nodes, not 150mA loads. | Select MAX8860EUK30+ only if load current stays ≤50mA and sub-25µVRMS noise is mandatory. |
| TPS76330DBVR | 3.0V fixed output, 150mA, but 120mV dropout at 150mA and 35µVRMS noise; no reverse battery protection; different pinout (IN-GND-EN-OUT-NC). | Lacks reverse polarity safeguard; requires PCB redesign due to non-'2982 pin compatibility. | Choose TPS76330DBVR only when lower dropout outweighs need for pin compatibility and reverse protection. |
Compared with MAX8877EUK30+, MAX8860EUK30+ trades current capability for marginally lower noise and higher dropout sensitivity, while TPS76330DBVR offers better dropout at the cost of missing reverse protection and incompatible pinout - making MAX8877EUK30+ optimal for drop-in upgrades in '2982-based designs demanding robustness and noise performance.
Availability
MAX8877EUK30+ is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, and palmtop computers requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance across industrial temperature range.
Supply support for MAX8877EUK30+ 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 needing ultra-low quiescent current, low-noise regulation, and robust fault protection - targeting cellular phones, cordless handsets, and compact computing devices.
FAQ
What is the maximum input voltage rating for MAX8877EUK30+?
The absolute maximum input voltage for MAX8877EUK30+ is +7V relative to GND. However, the recommended operating range is 2.5V to 6.5V. Exceeding 6.5V may trigger internal protection or degrade reliability; sustained operation above 7V risks permanent damage per Absolute Maximum Ratings.
Does MAX8877EUK30+ include auto-discharge functionality during shutdown?
No, MAX8877EUK30+ does not include auto-discharge. That feature is exclusive to the MAX8878 family. When MAX8877EUK30+ enters shutdown (SHDN ≤ 0.4V), the output goes high-impedance but remains floating - external circuitry must handle discharge if required.
What capacitor values are required for stable operation of MAX8877EUK30+?
For stable operation, MAX8877EUK30+ requires a minimum 1µF ceramic capacitor (ESR < 0.2Ω) on the OUT pin and a 1µF ceramic capacitor on the IN pin. The BP pin requires exactly 0.01µF ceramic. For VOUT = 3.0V (≥2.5V), 1µF–10µF output capacitance is acceptable; X7R/X5R dielectrics are preferred for temperature stability.
How does the dropout voltage of MAX8877EUK30+ vary with load and temperature?
MAX8877EUK30+ dropout voltage increases linearly with load current due to its P-channel MOSFET's RDS(ON). At 150mA, dropout is 165mV typ at +25°C, rising to ~180mV at +85°C. At 50mA, it drops to 55mV typ. Full characterization is shown in Figures MAX8877-10 and MAX8877-11 of the datasheet.
Is MAX8877EUK30+ pin-compatible with the LM2982 series?
Yes, MAX8877EUK30+ is explicitly designed as a pin-compatible upgrade to the industry-standard LM2982. It shares identical SOT23-5 pinout (IN, GND, SHDN, BP, OUT), allowing direct replacement without PCB modification - while improving dropout voltage, noise, and quiescent current.
MAX8877EUK30+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 3V
- 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
MAX8877EUK30+ FAQ
1.How can I place an order for MAX8877EUK30+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK30+ 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 MAX8877EUK30+ reliable?
The price and inventory of MAX8877EUK30+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK30+ is usually 5 days.
3.What payment methods are accepted for MAX8877EUK30+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK30+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK30+?
MAX8877EUK30+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK30+ 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 MAX8877EUK30+?
For technical support, including MAX8877EUK30+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK30+ requirements.
6.How does Aetrix verify that MAX8877EUK30+ is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK30+ 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 MAX8877EUK30+ meets industry standards.
7.What is the process for return or replacement of MAX8877EUK30+?
All MAX8877EUK30+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK30+, 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 MAX8877EUK30+ part is unused and in its original packaging.
Return procedure for MAX8877EUK30+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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