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Analog Devices Inc./Maxim Integrated MAX8878EUK27-T
- Part No.:
- MAX8878EUK27-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8878EUK27-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX8878EUK27-T from Maxim Integrated is a low-noise, low-dropout linear regulator with preset 2.7V output, delivering up to 150mA from 2.5V–6.5V input. It features 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current independent of load or dropout condition. Designed for battery-powered portable electronics requiring stable, quiet voltage regulation.
For engineers reviewing the MAX8878EUK27-T datasheet, MAX8878EUK27-T pinout, MAX8878EUK27-T application, or MAX8878EUK27-T equivalent, key selection criteria include its auto-discharge function (exclusive to MAX8878), SOT23-5 regular package compatibility with '2982 footprint, ±1.4% output accuracy over temperature, and thermal/reverse-battery protection - all critical for space-constrained, safety-sensitive power rails.
Technical Context
The MAX8878EUK27-T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling ultra-low quiescent current (100µA) across all operating conditions, including dropout. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
It integrates logic-controlled shutdown (10nA ISHDN), thermal shutdown at +155°C with 15°C hysteresis, short-circuit current limiting (160–390mA), and reverse battery protection limiting reverse current to 1mA. The MAX8878 variant uniquely adds active output discharge via a 300Ω internal resistance when SHDN is asserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.7V preset (±1.4% accuracy over -40°C to +85°C), factory-trimmed, no external resistors required |
| Max Output Current | 150mA continuous; supports peak loads without thermal shutdown under proper PCB layout |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 2.865V for full 2.7V output, extending battery life |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP capacitor - suitable for noise-sensitive analog/RF circuitry |
| Quiescent Current | 100µA at full load and in dropout - maintains efficiency during deep discharge or light-load sleep modes |
| Shutdown Current | 0.01µA typical (10nA) - minimizes battery drain during system standby |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature portable applications |
Pinout & Package
MAX8878EUK27-T is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), pin-compatible with industry-standard '2982 regulators. The GND pin serves dual electrical and thermal functions - requires connection to a large copper pour for optimal power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–6.5V; bypass with ≥1µF ceramic capacitor to GND for stability and line-transient immunity |
| 2 - GND | Ground reference and thermal path | Electrical return and primary heat sink - must be soldered to large PCB ground plane for thermal management |
| 3 - SHDN | Active-low enable/disable control | Pull low to enter 10nA shutdown; on MAX8878, triggers active output discharge to ground via 300Ω path |
| 4 - BP | Bypass node for reference noise filtering | Connects to 0.01µF ceramic capacitor to reduce output noise; forms 80Hz low-pass filter with internal 200kΩ resistor |
| 5 - OUT | Regulated output terminal | Delivers 2.7V @ up to 150mA; bypass with ≥1µF (ESR <0.2Ω) ceramic cap for VOUT ≥2.5V; stable with COUT ESR 0.01–10Ω |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Exclusive to MAX8878: actively pulls OUT to GND during shutdown via 300Ω internal path - prevents floating outputs and unintended biasing of downstream circuitry |
| P-channel MOSFET pass element | Eliminates base-drive current loss; enables constant 100µA IQ regardless of load or dropout - extends battery runtime vs. PNP-based LDOs |
| Reverse battery protection | Blocks reverse current to ≤1mA if VIN or SHDN falls below GND - protects IC and system during incorrect battery insertion |
| Thermal shutdown with hysteresis | Shuts down at +155°C junction temp; restarts only after cooling by 15°C - prevents thermal runaway while allowing safe recovery |
| '2982 pinout compatibility | Direct drop-in replacement for legacy regulators without PCB redesign - reduces qualification time for upgrade paths |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering RF transceiver bias rails and baseband analog sections in GSM/CDMA handsets. IC Role / Device Role / Timing Role: Low-noise 2.7V supply for VCOs, PLLs, and ADC front-ends where PSRR and spectral purity are critical. Use Value: 30µVRMS noise and 63dB PSRR at low frequencies prevent phase noise degradation and spurious emissions in transmit paths. |
Use Scenario: Providing regulated 2.7V to memory and interface logic in hot-pluggable PCMCIA Type II cards. IC Role / Device Role / Timing Role: Primary LDO for card-edge interface circuits requiring fast transient response and reverse-polarity fault tolerance. Use Value: 12mV load-step transient (0→50mA) and reverse battery protection ensure reliable operation during insertion/removal events. |
| Hand-Held Instruments | Electronic Planners |
|
Use Scenario: Supplying precision analog front-ends (op-amps, sensors, references) in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Stable, low-drift 2.7V rail for signal conditioning stages where output voltage accuracy directly impacts measurement fidelity. Use Value: ±1.4% output accuracy over -40°C to +85°C and <0.04%/mA load regulation minimize calibration drift across operating conditions. |
Use Scenario: Powering microcontroller cores and LCD drivers in battery-operated PDAs and organizers. IC Role / Device Role / Timing Role: Main system LDO with auto-discharge to safely isolate processor peripherals during deep-sleep mode. Use Value: Active output discharge eliminates residual voltage that could cause leakage or latch-up in unpowered peripherals upon wake-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-dropout LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8877EUK27-T | No auto-discharge; identical pinout, specs, and package - same 2.7V output, 150mA, 30µVRMS noise, and 100µA IQ | Lacks active output discharge - unsuitable where safe output collapse during shutdown is mandatory | Select MAX8877EUK27-T only if auto-discharge is unnecessary and cost minimization is prioritized |
| Torex XC6206P272MR-G | 2.7V fixed, 150mA, SOT23-5, but higher 250mV dropout at 150mA and 45µVRMS noise; no reverse battery or auto-discharge | Lower PSRR (55dB) and no thermal hysteresis - less robust in thermally demanding or noisy environments | Consider only for cost-sensitive, non-critical applications where 165mV dropout and 30µVRMS noise are not required |
Compared with MAX8878EUK27-T, MAX8877EUK27-T omits auto-discharge but matches all other electrical and mechanical specs, while XC6206P272MR-G trades performance (dropout, noise, protection) for lower unit cost - making MAX8878EUK27-T the optimal choice for reliability-critical, battery-powered systems requiring guaranteed output collapse.
Availability
MAX8878EUK27-T 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 parametric compliance.
Supply support for MAX8878EUK27-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) 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 IQ, low noise, and robust fault protection - targeting applications where every microamp and microvolt impact runtime and signal integrity.
FAQ
What is the output voltage tolerance of the MAX8878EUK27-T over temperature?
The MAX8878EUK27-T guarantees ±1.4% output voltage accuracy across the full operating temperature range of -40°C to +85°C, with tighter ±1.4% tolerance maintained at +25°C. This specification is confirmed in the Electrical Characteristics table and applies to the factory-preset 2.7V output without external trimming components.
Does the MAX8878EUK27-T require external capacitors for stability?
Yes, the MAX8878EUK27-T requires a minimum 1µF ceramic input capacitor (CIN) and a 1µF ceramic output capacitor (COUT) with ESR <0.2Ω for VOUT ≥2.5V. For optimal noise performance, a 0.01µF ceramic capacitor must also be placed on the BP pin. These values are specified in the Applications Information section and validated across temperature and load conditions.
How does the auto-discharge function work in the MAX8878EUK27-T?
When the SHDN pin is pulled low, the MAX8878EUK27-T activates an internal 300Ω discharge path between the OUT and GND pins, actively pulling the output voltage to ground. This behavior is exclusive to the MAX8878 family and is confirmed in the Pin Description and Detailed Description sections - the MAX8877 variant lacks this feature.
What is the maximum allowable input voltage for the MAX8878EUK27-T?
The absolute maximum input voltage for the MAX8878EUK27-T is +7V referenced to GND, per the Absolute Maximum Ratings table. However, the recommended operating input voltage range is 2.5V to 6.5V - exceeding 6.5V may degrade long-term reliability even if within absolute limits.
Is the MAX8878EUK27-T pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8878EUK27-T uses the exact same 5-pin SOT23-5 pinout as the industry-standard '2982 regulator, as explicitly stated in the General Description and verified in the Pin Configuration diagram. This allows direct mechanical and electrical replacement without PCB modification.
MAX8878EUK27-T 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):
- 2.7V
- 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
MAX8878EUK27-T FAQ
1.How can I place an order for MAX8878EUK27-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EUK27-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 MAX8878EUK27-T reliable?
The price and inventory of MAX8878EUK27-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EUK27-T is usually 5 days.
3.What payment methods are accepted for MAX8878EUK27-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EUK27-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EUK27-T?
MAX8878EUK27-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EUK27-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 MAX8878EUK27-T?
For technical support, including MAX8878EUK27-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EUK27-T requirements.
6.How does Aetrix verify that MAX8878EUK27-T is sourced from the original manufacturer or authorized distributors?
All MAX8878EUK27-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 MAX8878EUK27-T meets industry standards.
7.What is the process for return or replacement of MAX8878EUK27-T?
All MAX8878EUK27-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EUK27-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 MAX8878EUK27-T part is unused and in its original packaging.
Return procedure for MAX8878EUK27-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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