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Analog Devices Inc./Maxim Integrated MAX8878EUK30
- Part No.:
- MAX8878EUK30
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8878EUK30.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:2,785
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Product details
Overview
MAX8878EUK30 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 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current - enabling extended battery life in portable power rails. It is used in handheld instruments and PCMCIA cards where stable, quiet 3.0V bias is required.
For engineers reviewing the MAX8878EUK30 datasheet, MAX8878EUK30 pinout, MAX8878EUK30 application, or MAX8878EUK30 equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, and two confirmed alternative regulators for 3.0V LDO selection.
Technical Context
The MAX8878EUK30 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 reverse-battery protection (limits reverse current to 1mA), thermal shutdown at +155°C with 15°C hysteresis, and a dedicated BP pin for noise filtering via a 0.01µF capacitor. The MAX8878 variant adds auto-discharge: a 300Ω internal discharge path actively pulls OUT to GND during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±1.4% over -40°C to +85°C - ensures stable logic-level rail for 3.0V microcontrollers and peripherals. |
| Max Output Current | 150mA continuous - supports moderate-power analog front-ends or small FPGA I/O banks. |
| Dropout Voltage | 165mV at 150mA - allows operation down to 3.165V input, extending usable range of single-cell Li-ion or 3.3V supplies. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets noise-sensitive ADC reference or RF bias requirements. |
| Quiescent Current | 100µA across load and dropout - enables >1-year battery life in always-on sensor nodes drawing <10µA average. |
| Shutdown Current | 10nA logic-controlled shutdown - reduces system standby leakage to negligible levels in sleep modes. |
| Auto-Discharge | 300Ω active discharge path on SHDN assertion - prevents floating outputs and unintended wake-up in multi-rail systems. |
Pinout & Package
MAX8878EUK30 is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with exposed pad not electrically connected. Thermal performance relies on GND pin soldering to a large PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient immunity. |
| 2 GND | Ground reference and thermal path | Serves as primary heat sink; must connect to large PCB ground plane to maintain TJ ≤ +150°C at full load. |
| 3 SHDN | Active-low enable/disable control | Pull low to disable regulator and activate auto-discharge; pull high (≥2.0V) or tie to IN for normal operation. |
| 4 BP | Bypass node for reference noise reduction | Connects internally to 200kΩ resistor; 0.01µF ceramic cap here reduces output noise by filtering reference-band noise. |
| 5 OUT | Regulated 3.0V output | Supplies up to 150mA; requires ≥1µF ceramic cap (ESR <0.2Ω) 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, enabling constant 100µA IQ across all load and dropout conditions. |
| Auto-discharge function | 300Ω internal discharge path actively pulls OUT to GND during SHDN, preventing residual voltage hold-up in sequenced power systems. |
| Reverse battery protection | Blocks reverse current to <1mA when VIN or SHDN falls below GND - protects circuitry without external diodes. |
| Thermal shutdown with hysteresis | Shuts down at +155°C and re-enables only after cooling 15°C - prevents thermal cycling damage during sustained overload. |
| Low-noise BP pin architecture | Internal 200kΩ resistor + external 0.01µF cap forms 80Hz low-pass filter on reference, reducing output noise to 30µVRMS. |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
|
Use Scenario: Portable multimeters and data loggers powered by AA/AAA batteries with tight space constraints. IC Role / Device Role / Timing Role: Primary 3.0V supply for precision ADCs, op-amps, and microcontroller cores. Use Value: 30µVRMS noise and 165mV dropout extend battery runtime while maintaining measurement accuracy under varying load. |
Use Scenario: Credit-card-sized PCMCIA modems requiring clean, compact 3.0V rail from host 3.3V or battery source. IC Role / Device Role / Timing Role: Local LDO for UART transceivers and flash memory interface logic. Use Value: Auto-discharge ensures rapid power-down of card circuitry upon ejection, avoiding bus contention or latch-up. |
| Palmtop Computers | Electronic Planners |
|
Use Scenario: Early PDAs with dual-voltage logic (3.0V core, 3.3V I/O) and aggressive power budgeting. IC Role / Device Role / Timing Role: Dedicated 3.0V supply for CPU core and SRAM, isolated from noisy I/O rails. Use Value: 100µA quiescent current enables multi-week standby; reverse-battery protection safeguards against user-insertion errors. |
Use Scenario: Low-cost electronic organizers using coin-cell or alkaline batteries with minimal PCB area. IC Role / Device Role / Timing Role: Single-component 3.0V regulator for LCD controller and real-time clock. Use Value: SOT23-5 footprint and no external resistors simplify layout; 1.4% output accuracy maintains display contrast and RTC timing stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3.0V LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76330DBVR | Higher 250mV dropout at 150mA; 50µVRMS noise; no auto-discharge; 250mA max output. | Lacks active output discharge - unsuitable where fast shutdown sequencing is required. | Choose if higher output current is needed and auto-discharge is unnecessary. |
| MCP1700T-3002E/MB | Lower 175mV dropout at 250mA; 30µVRMS noise; no BP pin; 250mA max output; 1.6µA IQ (no shutdown). | No logic-controlled shutdown or auto-discharge; optimized for ultra-low-IQ, not low-noise. | Choose for battery-powered always-on sensors where shutdown is unused and lowest IQ dominates. |
Compared with MAX8878EUK30, TPS76330DBVR offers higher current but sacrifices noise performance and discharge capability, while MCP1700T-3002E/MB trades shutdown control and BP-based noise filtering for ultra-low quiescent current - making MAX8878EUK30 optimal for noise-critical, sequenced 3.0V rails with battery longevity demands.
Availability
MAX8878EUK30 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 traceable sourcing.
Supply support for MAX8878EUK30 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 precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and portable applications.
The MAX8877/MAX8878 product line delivers low-noise, low-dropout LDOs with auto-discharge and reverse-battery protection - engineered specifically for battery-powered handheld and communication devices where reliability, efficiency, and compactness are critical.
FAQ
What is the output voltage tolerance of the MAX8878EUK30 over temperature and load?
The MAX8878EUK30 guarantees ±1.4% output voltage accuracy across -40°C to +85°C and for load currents from 0.1mA to 120mA. At 25°C and 0.1mA load, tolerance tightens to ±1.4%; worst-case drift remains within specification limits under full operating conditions. This accuracy ensures reliable operation of 3.0V logic interfaces without external trimming.
Does the MAX8878EUK30 require external resistors to set its output voltage?
No, the MAX8878EUK30 has a factory-preset 3.0V output achieved via internal resistor feedback. No external resistors are needed - simplifying layout and eliminating calibration drift. The '30' suffix in the part number explicitly denotes the 3.0V variant, confirming its fixed-output configuration per Maxim's Expanded Ordering Information table.
How does the auto-discharge function operate in the MAX8878EUK30?
When the SHDN pin is pulled low, the MAX8878EUK30 activates an internal 300Ω discharge path between OUT and GND. This actively pulls the output voltage to ground within microseconds, preventing residual charge from powering downstream circuitry or causing unintended wake-up. The MAX8877 variant lacks this feature entirely.
What capacitor values are recommended for stable operation of the MAX8878EUK30?
For stable operation, use ≥1µF ceramic capacitor (ESR <0.2Ω) on OUT and ≥1µF on IN. For the BP pin, a 0.01µF ceramic capacitor is mandatory to achieve 30µVRMS noise. Larger COUT (e.g., 10µF) improves transient response but requires verification against the stable ESR region chart - which shows stable operation with COUT ESR between 0.01Ω and 10Ω at 150mA.
Is the MAX8878EUK30 pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8878EUK30 is explicitly designed as a pin-compatible upgrade to the industry-standard µA78Lxx family (e.g., MC78L30), including the '2982. Its SOT23-5 pinout matches IN, GND, SHDN, BP, and OUT in identical order - enabling drop-in replacement without PCB changes, provided thermal and capacitor requirements are met.
MAX8878EUK30 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):
- 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
MAX8878EUK30 FAQ
1.How can I place an order for MAX8878EUK30 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EUK30 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 MAX8878EUK30 reliable?
The price and inventory of MAX8878EUK30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EUK30 is usually 5 days.
3.What payment methods are accepted for MAX8878EUK30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EUK30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EUK30?
MAX8878EUK30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EUK30 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 MAX8878EUK30?
For technical support, including MAX8878EUK30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EUK30 requirements.
6.How does Aetrix verify that MAX8878EUK30 is sourced from the original manufacturer or authorized distributors?
All MAX8878EUK30 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 MAX8878EUK30 meets industry standards.
7.What is the process for return or replacement of MAX8878EUK30?
All MAX8878EUK30 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EUK30, 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 MAX8878EUK30 part is unused and in its original packaging.
Return procedure for MAX8878EUK30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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