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Analog Devices Inc./Maxim Integrated MAX8877EZK28+T
- Part No.:
- MAX8877EZK28+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8877EZK28+T.pdf
- Description:
- IC REG LIN 2.8V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,125
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Product details
Overview
MAX8877EZK28+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.8V preset output, 150mA max output current, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current. It uses an internal P-channel MOSFET pass device and operates from 2.5V to 6.5V input, serving as a stable power source for battery-powered portable electronics requiring tight voltage regulation and minimal quiescent consumption.
For engineers reviewing the MAX8877EZK28+T datasheet, MAX8877EZK28+T pinout, MAX8877EZK28+T application, or MAX8877EZK28+T equivalent, key selection criteria include dropout performance under 150mA load, 2.8V output accuracy (±1.4%), shutdown leakage (<10nA), thermal protection behavior, and compatibility with 0.01µF BP bypass capacitor for noise reduction.
Technical Context
The MAX8877EZK28+T implements a fixed-output LDO architecture using a P-channel MOSFET pass transistor with 1.1Ω typical RDS(ON), enabling low dropout and load-independent 100µA quiescent current. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider set for 2.8V output.
It integrates reverse-battery protection limiting reverse current to 1mA, thermal shutdown at +155°C with 15°C hysteresis, and short-circuit current limiting (160–390mA). Unlike the MAX8878 variant, it lacks auto-discharge functionality on shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.80V ±1.4% (factory-preset; stable across -40°C to +85°C and 0.1–120mA load) |
| 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 = 2.965V for regulated 2.8V output) |
| Output Noise | 30µVRMS (10Hz–100kHz; reduced further with 0.01µF BP capacitor) |
| Quiescent Current | 100µA (constant across load and dropout; enables >1-year battery life in 10µA-system standby) |
| Shutdown Current | 10nA (logic-low SHDN disables regulation and minimizes system leakage) |
| Input Voltage Range | 2.5V to 6.5V (supports single Li-ion, dual Alkaline/NiMH, or 3.3V/5V rail inputs) |
Pinout & Package
MAX8877EZK28+T is housed in a 5-pin thin SOT23 package (JEDEC MO-178AA), optimized for space-constrained portable designs. The GND pin serves dual roles - electrical ground reference and primary thermal path - requiring connection to a large copper pour for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input supply | Accepts 2.5–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient immunity |
| 2 GND | Ground reference and thermal sink | Must be soldered to large PCB copper area to maintain TJ < +150°C at full load |
| 3 SHDN | Active-low enable control | Pulled low to enter 10nA shutdown; tied to IN for always-on operation |
| 4 BP | Bypass node for reference noise filtering | Connects to 0.01µF ceramic capacitor to reduce output noise by filtering 1.25V reference |
| 5 OUT | Regulated output | Delivers up to 150mA at 2.8V; requires ≥1µF (ESR < 0.2Ω) ceramic capacitor for VOUT ≥ 2.5V |
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 |
| Low 30µVRMS output noise | Meets RF and precision analog circuit requirements without additional post-regulation filtering |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND, preventing damage in miswired battery compartments |
| Thermal shutdown with hysteresis | Shuts down at +155°C and re-enables only after cooling 15°C, preventing oscillation during sustained overload |
| 10nA logic-controlled shutdown | Reduces system standby power to nanoampere level, critical for long-life coin-cell or energy-harvesting applications |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor core voltage in GSM/EDGE handsets with single Li-ion battery input. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying digital baseband IC requiring low noise and fast transient response. Use Value: 165mV dropout extends usable battery range to ~3.0V, while 30µVRMS noise avoids digital jitter in clock domains. |
Use Scenario: Providing clean 2.8V supply to PCMCIA card controller and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Local regulation of host-supplied 3.3V or 5V rail to meet JEIDA/PCMCIA voltage tolerance specs. Use Value: Pin-compatible replacement for '2982 regulators; 100µA IQ reduces slot power budget impact during card sleep states. |
| Hand-Held Instruments | Electronic Planners |
|
Use Scenario: Regulating power for microcontroller, ADC, and LCD driver in portable multimeters or data loggers. IC Role / Device Role / Timing Role: Single-chip 2.8V source ensuring stable reference and analog front-end performance across battery discharge. Use Value: ±1.4% output accuracy maintains measurement integrity; reverse-battery protection prevents field failure from incorrect battery insertion. |
Use Scenario: Supplying real-time clock (RTC), SRAM, and touch controller in palm-sized organizers with coin-cell backup. IC Role / Device Role / Timing Role: Main 2.8V regulator active during main battery operation; shutdown mode enables <10nA system leakage. Use Value: Low-noise output prevents timing errors in RTC crystal oscillator; thin SOT23 footprint fits ultra-thin form factors. |
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 |
|---|---|---|---|
| MAX8877EUK28-T | Same die, regular (not thin) SOT23-5 package; θJB = 140°C/W vs. 110°C/W for thin variant | Suitable where board height is unconstrained but thermal margin is higher due to larger pad area | Select when PCB layout allows standard SOT23 footprint and thermal design targets <125°C junction at 150mA |
| MCP1700T-2802E/MB | 250mA rated, 6µA IQ, no BP pin; 170mV dropout at 250mA; different pinout (SOT23-3) | Used in cost-sensitive, lower-current applications where ultra-low IQ outweighs noise and precision needs | Choose only if 2.8V accuracy ±2% and 40µVRMS noise are acceptable; not pin-compatible |
Compared with MAX8877EZK28+T, the MAX8877EUK28-T offers identical electrical performance in a thermally less efficient package, while the MCP1700T-2802E/MB trades noise, accuracy, and shutdown depth for lower quiescent current and cost - making it suitable only where those compromises align with system priorities.
Availability
MAX8877EZK28+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 manufacturability, and guaranteed parametric compliance over industrial temperature range (-40°C to +85°C).
Supply support for MAX8877EZK28+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-noise, low-quiescent-current regulation with industry-standard '2982 pin compatibility and robust fault protection.
FAQ
What is the output voltage tolerance of the MAX8877EZK28+T over temperature and load?
The MAX8877EZK28+T delivers 2.80V output with ±1.4% accuracy across -40°C to +85°C ambient temperature and 0.1mA to 120mA load current. This specification is guaranteed by production testing and statistical correlation, ensuring consistent performance in handheld and portable equipment where battery voltage varies significantly.
Does the MAX8877EZK28+T include thermal shutdown protection?
Yes, the MAX8877EZK28+T incorporates thermal-overload protection that disables the pass transistor when junction temperature exceeds +155°C. It re-enables automatically after cooling by 15°C, providing pulsed operation during sustained overload - a safeguard confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of its datasheet.
Can the MAX8877EZK28+T be used with ceramic output capacitors?
Yes, the MAX8877EZK28+T is stable with ceramic output capacitors ≥1µF (for VOUT ≥ 2.5V) and ESR < 0.2Ω. X7R or X5R dielectrics are recommended for full-temperature stability; Z5U/Y5V types may require ≥2× capacitance at low temperatures to maintain phase margin.
What is the purpose of the BP pin on the MAX8877EZK28+T?
The BP (bypass) pin on the MAX8877EZK28+T connects to an internal 200kΩ resistor and the 1.25V bandgap reference, forming an 80Hz low-pass filter when a 0.01µF ceramic capacitor is attached. This reduces reference noise contribution, enabling the specified 30µVRMS output noise performance.
Is the MAX8877EZK28+T pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EZK28+T is explicitly designed as a pin-compatible upgrade to the industry-standard '2982 family. Its SOT23-5 pinout matches IN, GND, SHDN, BP, and OUT assignments, allowing drop-in replacement while delivering improved dropout voltage and lower output noise.
MAX8877EZK28+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 2.8V
- 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:
- TSOT-23-5
MAX8877EZK28+T FAQ
1.How can I place an order for MAX8877EZK28+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EZK28+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 MAX8877EZK28+T reliable?
The price and inventory of MAX8877EZK28+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK28+T is usually 5 days.
3.What payment methods are accepted for MAX8877EZK28+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK28+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EZK28+T?
MAX8877EZK28+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EZK28+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 MAX8877EZK28+T?
For technical support, including MAX8877EZK28+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK28+T requirements.
6.How does Aetrix verify that MAX8877EZK28+T is sourced from the original manufacturer or authorized distributors?
All MAX8877EZK28+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 MAX8877EZK28+T meets industry standards.
7.What is the process for return or replacement of MAX8877EZK28+T?
All MAX8877EZK28+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK28+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 MAX8877EZK28+T part is unused and in its original packaging.
Return procedure for MAX8877EZK28+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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