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Analog Devices Inc./Maxim Integrated MAX8878EUK28+T
- Part No.:
- MAX8878EUK28+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8878EUK28+T.pdf
- Description:
- IC REG LINEAR 2.8V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,970
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Product details
Overview
MAX8878EUK28+T from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 2.8V 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. Designed for battery-powered portable electronics requiring stable, quiet voltage regulation.
For engineers reviewing the MAX8878EUK28+T datasheet, MAX8878EUK28+T pinout, MAX8878EUK28+T application, or MAX8878EUK28+T equivalent, key selection criteria include its auto-discharge function, ±1.4% output accuracy over temperature, SOT23-5 regular package compatibility with '2982 footprint, and thermal/short-circuit protection for robust operation in space-constrained handheld systems.
Technical Context
The MAX8878EUK28+T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling low quiescent current across all operating conditions-including dropout-without base-drive losses. 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), reverse battery protection limiting reverse current to 1mA, and an auto-discharge circuit (300Ω discharge path) active only on MAX8878 variants. The BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter, reducing output noise to 30µVRMS (10Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1.4% over -40°C to +85°C - ensures stable core/peripheral rail without external resistors. |
| Max Output Current | 150mA continuous - supports moderate-power microcontrollers, RF front-ends, and analog sensors. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 2.965V input, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - minimizes interference in noise-sensitive ADCs, audio codecs, and PLL power domains. |
| Quiescent Current | 100µA at full load and in dropout - maintains ultra-low standby power without sacrificing regulation performance. |
| Shutdown Current | 10nA typical - reduces system leakage during deep sleep, critical for multi-year battery life in IoT endpoints. |
| Thermal Shutdown | 155°C with 15°C hysteresis - provides self-recovery under sustained overload without latch-up or manual reset. |
Pinout & Package
MAX8878EUK28+T is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), compatible with industry-standard '2982 footprint. The GND pin serves dual roles: electrical ground reference and primary thermal path; soldering to a large copper pour improves power dissipation capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to GND for stability and line-transient suppression. |
| 2 GND | Ground reference and thermal sink | Must connect to PCB ground plane or large thermal pad to manage 571mW max power dissipation at +70°C ambient. |
| 3 SHDN | Active-low enable/discharge control | Pulling low disables regulation and activates auto-discharge (300Ω path to GND) - unique to MAX8878 family. |
| 4 BP | Bypass node for reference noise filtering | Connects to 0.01µF ceramic capacitor; forms 80Hz RC filter to reduce bandgap reference noise contribution to output. |
| 5 OUT | Regulated output terminal | Delivers 2.8V at up to 150mA; requires ≥1µF (ESR <0.2Ω) ceramic capacitor for VOUT ≥2.5V applications. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | 300Ω active pull-down path from OUT to GND during shutdown - prevents floating outputs and enables fast system reset sequencing. |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) - eliminates base-drive current loss, enabling constant 100µA IQ regardless of load or input voltage. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND - protects IC and downstream circuitry without external diodes. |
| Low-noise BP filtering | 0.01µF capacitor at BP reduces output noise to 30µVRMS - meets stringent requirements for precision analog and RF subsystems. |
| Thermal shutdown with hysteresis | 155°C trip point with 15°C recovery gap - allows automatic cycling under fault conditions while preventing thermal runaway. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor I/O rails and RF transceiver bias supplies in compact GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary LDO providing clean, low-noise 2.8V supply with fast transient response to handle burst-mode transmit current spikes. Use Value: 165mV dropout extends usable battery range by ~120mV compared to legacy '2982-compatible regulators, delaying brownout events. |
Use Scenario: Regulating interface voltage for hot-pluggable PCMCIA memory or modem cards in laptops and industrial terminals. IC Role / Device Role / Timing Role: Isolated power domain controller with reverse battery protection and auto-discharge to prevent backfeed during card insertion/removal. Use Value: 10nA shutdown current and 300Ω discharge path ensure safe, glitch-free hot-swap operation without external FETs or timing circuits. |
| Hand-Held Instruments | Electronic Planners |
|
Use Scenario: Supplying precision ADC reference buffers and sensor signal chains in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise voltage source decoupling sensitive analog front-ends from noisy digital supplies and switching regulators. Use Value: 30µVRMS output noise and 63dB PSRR at low frequencies preserve effective resolution of 16-bit+ ADCs without additional filtering. |
Use Scenario: Powering real-time clock (RTC), SRAM backup, and touch controller in battery-backed PDAs and scheduling devices. IC Role / Device Role / Timing Role: Always-on regulator maintaining critical subsystems during main CPU sleep cycles with minimal battery drain. Use Value: 100µA operating current and 10nA shutdown current enable >5-year coin-cell lifetime in RTC/SRAM retention mode. |
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 |
|---|---|---|---|
| TPS76328DBVR | 2.8V fixed, 150mA, 250mV dropout at 150mA, 50µVRMS noise, no auto-discharge | Lacks active output discharge; requires external pulldown for reset sequencing | Choose when auto-discharge is unnecessary and TI's 1.5mm × 1.5mm SOT-23-5 footprint is preferred. |
| MCP1702T-2802E/MB | 2.8V fixed, 250mA, 600mV dropout at 250mA, 30µVRMS noise, 2.5µA IQ | Higher dropout limits use in low-VIN battery systems; lower IQ benefits ultra-low-power sleep modes | Choose for higher current headroom and lowest possible quiescent draw where dropout margin exceeds 600mV. |
Compared with TPS76328DBVR and MCP1702T-2802E/MB, MAX8878EUK28+T uniquely combines ultra-low dropout (165mV), industry-standard '2982 pinout, and integrated auto-discharge - making it optimal for space-constrained, battery-critical designs requiring guaranteed output discharge during shutdown.
Availability
MAX8878EUK28+T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, hand-held instruments, and electronic planners requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX8878EUK28+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, low dropout, and minimal quiescent current - targeting cellular telephones, cordless phones, and handheld instrumentation.
FAQ
What is the output voltage tolerance of MAX8878EUK28+T over temperature and load?
The MAX8878EUK28+T delivers 2.8V output with ±1.4% accuracy across -40°C to +85°C and 0.1mA–120mA load range. At 25°C and 0.1mA load, tolerance tightens to ±1.4% min/max; worst-case drift remains bounded per Electrical Characteristics table, ensuring reliable operation in thermally varying environments without recalibration.
Does MAX8878EUK28+T require external components for stable operation?
Yes - MAX8878EUK28+T requires three external capacitors: 1µF ceramic on IN to GND, 1µF (min, ESR <0.2Ω) ceramic on OUT to GND, and 0.01µF ceramic on BP to GND. These are mandatory for stability, noise reduction, and transient response; omitting BP capacitor increases output noise to >100µVRMS.
How does the auto-discharge feature of MAX8878EUK28+T operate?
The MAX8878EUK28+T activates a 300Ω internal discharge path from OUT to GND when SHDN is pulled low. This actively pulls the output voltage to ground within microseconds - unlike passive discharge via load - ensuring rapid, deterministic reset behavior essential for FPGA configuration and microcontroller brownout recovery.
What thermal protection mechanisms are built into MAX8878EUK28+T?
MAX8878EUK28+T incorporates thermal shutdown at 155°C with 15°C hysteresis. When junction temperature exceeds 155°C, the pass transistor turns off; it re-enables only after cooling to 140°C. This cycling behavior prevents permanent damage during sustained overload while maintaining functional safety without external supervision.
Is MAX8878EUK28+T pin-compatible with the industry-standard '2982 regulator?
Yes - MAX8878EUK28+T uses the same 5-pin SOT23-5 regular package and pinout as the industry-standard '2982: Pin 1=IN, Pin 2=GND, Pin 3=SHDN, Pin 4=BP, Pin 5=OUT. This enables drop-in replacement with improved specs: lower dropout (165mV vs. typical 350mV), lower noise (30µVRMS vs. 50–80µVRMS), and added auto-discharge.
MAX8878EUK28+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):
- 2.8V
- 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
MAX8878EUK28+T FAQ
1.How can I place an order for MAX8878EUK28+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8878EUK28+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 MAX8878EUK28+T reliable?
The price and inventory of MAX8878EUK28+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8878EUK28+T is usually 5 days.
3.What payment methods are accepted for MAX8878EUK28+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8878EUK28+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8878EUK28+T?
MAX8878EUK28+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8878EUK28+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 MAX8878EUK28+T?
For technical support, including MAX8878EUK28+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8878EUK28+T requirements.
6.How does Aetrix verify that MAX8878EUK28+T is sourced from the original manufacturer or authorized distributors?
All MAX8878EUK28+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 MAX8878EUK28+T meets industry standards.
7.What is the process for return or replacement of MAX8878EUK28+T?
All MAX8878EUK28+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8878EUK28+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 MAX8878EUK28+T part is unused and in its original packaging.
Return procedure for MAX8878EUK28+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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