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Analog Devices Inc./Maxim Integrated MAX8878EUK30+T
- Part No.:
- MAX8878EUK30+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8878EUK30+T.pdf
- Description:
- IC REG LINEAR 3V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,458
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Product details
Overview
MAX8878EUK30+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 3.0V preset output, 150mA max output current, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current. It employs an internal P-channel MOSFET pass device and delivers stable power to battery-powered portable electronics requiring tight voltage regulation and minimal quiescent consumption.
For engineers reviewing the MAX8878EUK30+T datasheet, MAX8878EUK30+T pinout, MAX8878EUK30+T application, or MAX8878EUK30+T equivalent, key selection criteria include dropout performance at 150mA, shutdown leakage (10nA), auto-discharge capability, BP capacitor noise filtering, and SOT23-5 regular package compatibility with industry-standard '2982 footprints.
Technical Context
The MAX8878EUK30+T uses a 1.25V bandgap reference and error amplifier to regulate output via an internal P-channel MOSFET pass transistor with ~1.1Ω RDS(ON). Its feedback is fixed by on-die resistors, eliminating external resistor networks. The BP pin connects to a 0.01µF capacitor forming an 80Hz low-pass filter that reduces reference noise contribution to output.
Thermal shutdown activates at +155°C with 15°C hysteresis, and reverse battery protection limits reverse current to ≤1mA when IN or SHDN falls below GND. The MAX8878 variant uniquely includes active output discharge through a 300Ω internal path during shutdown - a feature absent in the MAX8877.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.00V ±1.4% (factory-preset; no external resistors required) |
| Max Output Current | 150mA continuous; supports peak loads without foldback |
| Dropout Voltage | 165mV at 150mA (enables operation down to VIN = 3.165V for 3.0V output) |
| Output Noise | 30µVRMS (10Hz–100kHz; enables clean supply for RF/analog circuits) |
| Quiescent Current | 100µA over full load and dropout range (extends battery life in always-on systems) |
| Shutdown Current | 10nA logic-controlled (reduces system standby power to nanoamp level) |
| Auto-Discharge | Active 300Ω discharge path to GND during SHDN (prevents floating outputs in power sequencing) |
Pinout & Package
SOT23-5 regular package (5-pin, 1.6mm × 2.9mm × 1.1mm height), JEDEC MO-178AA compliant, thermal pad connected to GND. Pin 2 (GND) serves dual role as electrical ground and primary heatsink - requires soldering to ≥25mm² 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 rejection |
| 2 GND | Ground reference and thermal path | Electrical return + heatsink; must connect to large PCB copper area to sustain 571mW at +70°C |
| 3 SHDN | Active-low enable control | Logic low (≤0.4V) enables 10nA shutdown; on MAX8878EUK30+T triggers auto-discharge |
| 4 BP | Bypass for internal reference | Connects to 0.01µF ceramic cap; forms 80Hz filter reducing reference noise contribution to output |
| 5 OUT | Regulated output | Delivers up to 150mA; requires ≥1µF (ESR < 0.2Ω) ceramic cap for VOUT ≥ 2.5V (e.g., 3.0V) |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current; maintains 100µA IQ across all load/dropout conditions |
| Auto-discharge (MAX8878 only) | 300Ω internal discharge path pulls OUT to GND within microseconds of SHDN assertion |
| Reverse battery protection | Blocks >99% of reverse current (<1mA) when IN or SHDN < GND - prevents damage in miswired battery packs |
| Thermal shutdown with hysteresis | Shuts down at +155°C; re-enables only after cooling 15°C - avoids thermal oscillation during overload |
| 100mV-output increment options | Factory-set 3.0V output eliminates external resistor network, saving board space and calibration effort |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering RF transceiver ICs and baseband processors in GSM/CDMA handsets with single-cell Li-ion input. IC Role / Device Role / Timing Role: Primary LDO delivering clean 3.0V rail; regulates voltage between battery decay (4.2V → 3.0V) and system cutoff. Use Value: 165mV dropout extends usable battery life by ~12 minutes at end-of-discharge; 30µVRMS noise prevents RX desensitization. |
Use Scenario: Providing regulated 3.0V to memory and interface logic in hot-pluggable PCMCIA Type II cards. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card logic from host bus voltage fluctuations and insertion transients. Use Value: 10nA shutdown current prevents card battery drain during host sleep; auto-discharge ensures safe hot-removal. |
| Palmtop Computers | Electronic Planners |
Use Scenario: Supplying 3.0V to microcontroller core and LCD driver in ARM-based palmtops with 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Main system LDO enabling deep-sleep modes where only real-time clock and wake logic remain active. Use Value: 100µA IQ sustains >14-day standby; BP capacitor filtering suppresses switching noise from DC-DC converters sharing same battery. |
Use Scenario: Regulating 3.0V for SRAM retention and touch-screen controller in low-power electronic organizers. IC Role / Device Role / Timing Role: Always-on LDO maintaining memory voltage during button-wake cycles and calendar updates. Use Value: Reverse battery protection prevents damage if user inserts AAA cells backward; thermal shutdown guards against 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 |
|---|---|---|---|
| MAX8877EUK30+T | No auto-discharge; identical pinout, specs, and package | Cannot actively discharge output during shutdown - requires external circuitry for safe power sequencing | Select when auto-discharge is unnecessary and cost minimization is critical |
| MCP1700-3002E/TO | Higher 170mV dropout at 150mA; 25µVRMS noise; no BP pin or reverse battery protection | Lacks reverse polarity protection and active discharge - unsuitable for consumer battery compartments | Choose for cost-sensitive industrial sensors where input polarity is guaranteed and shutdown discharge is not required |
Compared with MAX8878EUK30+T, the MAX8877EUK30+T omits auto-discharge but matches all electrical and mechanical specs - making it a drop-in substitute where output discharge isn't needed. The MCP1700-3002E/TO offers lower cost but sacrifices reverse protection, noise performance, and dropout margin, limiting its use to controlled environments.
Availability
MAX8878EUK30+T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply, long-lifecycle support, and guaranteed traceability for medical and industrial deployments.
Supply support for MAX8878EUK30+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) designs precision analog, mixed-signal, and power-management ICs for high-reliability applications in automotive, industrial, and communications markets.
The MAX8877/MAX8878 product line targets battery-powered portable electronics needing ultra-low IQ, low noise, and robust fault protection - with emphasis on extended runtime and safe operation under reverse polarity or thermal stress.
FAQ
What is the maximum input voltage rating for the MAX8878EUK30+T?
The MAX8878EUK30+T has an absolute maximum input voltage of +7V relative to GND. Its recommended operating input range is 2.5V to 6.5V. Exceeding 6.5V may degrade long-term reliability even if within absolute ratings, and operation below 2.5V prevents regulation at 3.0V output due to dropout constraints. Always use a 1µF ceramic capacitor between IN and GND for transient suppression.
Does the MAX8878EUK30+T require an external BP capacitor to function?
Yes - the MAX8878EUK30+T requires a 0.01µF ceramic capacitor between BP and GND to achieve specified 30µVRMS output noise. Omitting this capacitor increases output noise by ~2× and degrades PSRR above 1kHz. Larger values (>0.1µF) increase startup time without meaningful noise reduction and are not recommended per the datasheet.
How does the auto-discharge feature operate in the MAX8878EUK30+T?
When the SHDN pin is driven low, the MAX8878EUK30+T activates an internal 300Ω discharge path from OUT to GND, pulling the output voltage to near-zero within ~100µs (with typical 1µF output capacitance). This feature is exclusive to the MAX8878 family and is absent in MAX8877 variants. It eliminates need for external bleed resistors in power-sequencing-critical applications.
What thermal derating applies to the MAX8878EUK30+T in SOT23-5 regular package?
In the SOT23-5 regular package, the MAX8878EUK30+T has a θJB of 140°C/W and a maximum continuous power dissipation of 571mW at +70°C ambient. Above +70°C, power must be derated at 7.1mW/°C. For example, at +85°C ambient, max allowable power drops to 465mW. Adequate GND pad copper area (≥25mm²) is mandatory to achieve these ratings.
Is the MAX8878EUK30+T pin-compatible with the industry-standard '2982 regulator?
Yes - the MAX8878EUK30+T uses the same 5-pin SOT23-5 pinout as the industry-standard µA78Lxx and MC78Lxx '2982 family. Pin 1 is IN, Pin 2 is GND, Pin 3 is SHDN (functionally equivalent to '2982's ON/OFF), Pin 4 is BP (unique to MAX8878), and Pin 5 is OUT. The BP pin is NC on '2982 devices, so layout compatibility requires verifying routing does not short BP to adjacent traces.
MAX8878EUK30+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX8878EUK30+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EUK30+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 MAX8878EUK30+T reliable?
The price and inventory of MAX8878EUK30+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EUK30+T is usually 5 days.
3.What payment methods are accepted for MAX8878EUK30+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EUK30+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EUK30+T?
MAX8878EUK30+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EUK30+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 MAX8878EUK30+T?
For technical support, including MAX8878EUK30+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EUK30+T requirements.
6.How does Aetrix verify that MAX8878EUK30+T is sourced from the original manufacturer or authorized distributors?
All MAX8878EUK30+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 MAX8878EUK30+T meets industry standards.
7.What is the process for return or replacement of MAX8878EUK30+T?
All MAX8878EUK30+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EUK30+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 MAX8878EUK30+T part is unused and in its original packaging.
Return procedure for MAX8878EUK30+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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