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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 2.7V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,177
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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 30µVRMS output noise, 165mV dropout at 150mA, 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, ±1.4% output accuracy over -40°C to +85°C, reverse battery protection, and SOT23-5 regular package compatibility with industry-standard '2982 footprint.
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 - and eliminating base-drive losses inherent in PNP-based regulators. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to OUT.
It integrates logic-controlled shutdown (10nA ISHDN), thermal shutdown at +155°C with 15°C hysteresis, short-circuit protection, and - uniquely versus MAX8877 - active output discharge via a 300Ω internal resistance when SHDN is asserted. The BP pin supports noise reduction via a 0.01µF capacitor forming an 80Hz low-pass filter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.7V preset (±1.4% accuracy over -40°C to +85°C); eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 150mA continuous; sufficient for RF front-ends, microcontroller cores, and sensor signal chains in portable devices. |
| Dropout Voltage | 165mV at 150mA; enables operation down to VIN = 2.865V, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz, CBP = 0.01µF, COUT = 10µF); meets stringent noise requirements for ADC references and RF power amplifiers. |
| Quiescent Current | 100µA (operating, any load/dropout); maintains efficiency during light-load sleep modes without compromising regulation. |
| Shutdown Current | 30nA typical at +25°C; ensures negligible battery drain during system standby or deep-sleep states. |
| PSRR | 63dB at 100Hz; suppresses low-frequency ripple from switching converters or noisy DC sources feeding the LDO input. |
Pinout & Package
MAX8878EUK27+T is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with GND serving as both electrical reference and thermal path. The package is compatible with standard '2982 footprint and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. IN | Regulator input | Accepts 2.5V–6.5V supply; requires ≥1µF ceramic bypass to GND for stability and line-transient suppression. |
| 2. GND | Ground / thermal pad | Reference node and primary heat dissipation path; must connect to large PCB copper area for thermal performance. |
| 3. SHDN | Active-low enable/discharge control | Pulls low to enter shutdown (10nA IQ) and trigger auto-discharge; high or floating for normal operation. |
| 4. BP | Bypass capacitor connection | Connects to 0.01µF ceramic cap to reduce reference noise; forms 80Hz low-pass filter with internal 200kΩ resistor. |
| 5. OUT | Regulated output | Delivers 2.7V @ ≤150mA; requires ≥1µF (VOUT ≥2.5V) or ≥3.3µF (VOUT <2.5V) ceramic output capacitor with ESR <0.2Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Active 300Ω discharge path from OUT to GND during shutdown - prevents residual voltage hold-up on downstream circuitry. |
| Reverse battery protection | Limits reverse supply current to ≤1mA if VIN or SHDN falls below GND - protects IC and system during incorrect battery insertion. |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON); enables constant 100µA IQ regardless of load or dropout - no efficiency penalty in low-power states. |
| Thermal shutdown with hysteresis | Triggers at +155°C junction temperature and resets at +140°C; prevents latch-up and enables safe recovery under sustained overload. |
| Current limiting | Guaranteed 160mA minimum current limit; allows indefinite short-circuit survival while maintaining predictable fault behavior. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor core and RF transceiver bias rails in GSM/EDGE handsets with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 2.7V LDO supplying noise-sensitive analog blocks; regulates voltage during rapid load transients (e.g., TX burst). Use Value: 30µVRMS noise and 12mV load-step deviation ensure clean power for 12-bit ADCs and VCOs; auto-discharge prevents leakage into powered-down RF sections. |
Use Scenario: Providing regulated 2.7V supply to PCMCIA card controller and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card circuitry from noisy host bus power; enables hot-plug compliance. Use Value: Reverse battery protection safeguards card during insertion/removal; 100µA IQ minimizes standby drain when card is inactive but inserted. |
| Hand-Held Instruments | Electronic Planners |
|
Use Scenario: Supplying precision analog front-end (AFE) and microcontroller in portable multimeters or data loggers. IC Role / Device Role / Timing Role: Low-noise 2.7V source for op-amp biasing and reference buffers; maintains accuracy during battery voltage sag. Use Value: ±1.4% output accuracy and <165mV dropout preserve measurement resolution down to 2.865V input - extending usable battery range by >15%. |
Use Scenario: Powering real-time clock (RTC), SRAM backup, and touch-screen controller in PDAs and electronic organizers. IC Role / Device Role / Timing Role: Always-on LDO with shutdown control; supplies RTC during main system sleep and discharges output before full power-down. Use Value: 10nA shutdown current prevents calendar drift over weeks of storage; auto-discharge ensures clean reset sequence upon wake-up. |
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 |
|---|---|---|---|
| MAX8877EUK27+T | No auto-discharge; identical pinout, specs, and package - same 2.7V output, 150mA, 30µVRMS noise, and 100µA IQ. | Suitable where output discharge is unnecessary (e.g., non-critical digital loads without hold-up capacitors). | Select MAX8877EUK27+T only if auto-discharge is not required - avoids paying premium for unused functionality. |
| Torex XC6206P272MR-G | 2.7V fixed, 150mA, 45µVRMS noise, 250mV dropout at 150mA, SOT23-5, but lacks reverse battery protection and auto-discharge. | Acceptable for cost-sensitive consumer devices where noise and dropout are less critical than in RF or precision analog systems. | Choose XC6206P272MR-G only for non-battery-reversal environments and where 15µVRMS higher noise and 85mV higher dropout are acceptable. |
Compared with MAX8877EUK27+T, the MAX8878EUK27+T adds essential auto-discharge for clean system power sequencing; compared with XC6206P272MR-G, it delivers superior noise, dropout, and integrated protection - justifying use in mission-critical portable electronics.
Availability
MAX8878EUK27+T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, and hand-held instruments requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
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 demanding ultra-low noise, minimal quiescent current, and robust protection - targeting cellular phones, handheld instruments, and PCMCIA peripherals.
FAQ
What is the output voltage tolerance of MAX8878EUK27+T over temperature and load?
The MAX8878EUK27+T guarantees ±1.4% output voltage accuracy across the full -40°C to +85°C operating temperature range and for output currents from 0.1mA to 120mA. At +25°C and 0.1mA load, the tolerance tightens to ±1.4% (not ±1.0%). This specification ensures reliable operation in battery-powered devices exposed to wide ambient conditions without requiring external trimming.
Does MAX8878EUK27+T require an external bypass capacitor on the BP pin?
Yes, MAX8878EUK27+T requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 30µVRMS output noise. Omitting this capacitor increases noise significantly - measurements show >100µVRMS without it. Larger values (e.g., 0.1µF) marginally reduce noise but increase startup time and are not recommended per the datasheet.
How does the auto-discharge function operate in MAX8878EUK27+T?
When the SHDN pin is pulled low, MAX8878EUK27+T activates an internal 300Ω discharge path from OUT to GND, actively pulling the output voltage to ground within microseconds. This prevents residual voltage from powering downstream circuitry unintentionally - a critical feature for systems requiring clean power-down sequencing, such as real-time clocks or memory backup rails.
Can MAX8878EUK27+T be used with input voltages below 2.5V?
No, MAX8878EUK27+T has a minimum input voltage rating of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V is not characterized or guaranteed - regulation fails, and device behavior becomes unpredictable. For sub-2.5V inputs, consider alternative LDOs like the MAX8526 series.
What thermal derating applies to MAX8878EUK27+T in SOT23-5 regular package?
In the SOT23-5 regular package, MAX8878EUK27+T has a thermal resistance θJB of 140°C/W. Its continuous power dissipation is rated at 571mW at +70°C ambient, derating linearly by 7.1mW/°C above that temperature. To maintain junction temperature ≤+150°C, PCB layout must provide adequate copper area on the GND pin for heat spreading.
MAX8878EUK27+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:
- Obsolete
- 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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