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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Analog Devices Inc./Maxim Integrated MAX8877EZK25+T

Name: MAX8877EZK25+T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX8877EZK25+T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX8877EZK25+T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: SOT-23-5 Thin, TSOT-23-5

Datasheet:: MAX8877EZK25+T.pdf

Description:: IC REG LIN 2.5V 150MA TSOT23-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MAX8877EZK25+T from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 2.5V 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 - designed for battery-powered portable electronics requiring stable, clean voltage rails.

For engineers reviewing the MAX8877EZK25+T datasheet, MAX8877EZK25+T pinout, MAX8877EZK25+T application, or MAX8877EZK25+T equivalent, key selection criteria include its thin SOT23-5 package, ±1.4% output accuracy over -40°C to +85°C, reverse battery protection, and logic-controlled 10nA shutdown mode.

Technical Context

The MAX8877EZK25+T uses an internal P-channel MOSFET pass transistor (1.1Ω typical R_DS(ON)) to achieve low dropout and eliminate base-drive current losses. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.

Noise reduction is implemented via a dedicated BP pin with external 0.01µF capacitor forming an 80Hz low-pass filter; 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.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.5V ±1.4% over -40°C to +85°C - ensures stable core/peripheral rail in portable systems.
Max Output Current	150mA continuous - supports microcontrollers, RF front-ends, and sensor interfaces without external boost.
Dropout Voltage	165mV at 150mA - enables operation down to 2.665V input, extending usable battery life in single-cell Li-ion or alkaline systems.
Output Noise	30µV_RMS (10Hz–100kHz) with 0.01µF BP cap - meets low-noise analog/RF supply requirements without additional filtering.
Quiescent Current	100µA across load and dropout - maintains efficiency during light-load sleep modes in always-on devices.
Shutdown Current	10nA logic-controlled - reduces system standby power to nanoampere level for long-term battery retention.
Input Voltage Range	2.5V to 6.5V - compatible with single-cell Li-ion (2.7–4.2V), LiFePO₄, and dual-alkaline sources.

Pinout & Package

MAX8877EZK25+T is housed in a thin 5-pin SOT23 package (JEDEC MO-178AA), optimized for space-constrained portable PCBs. The exposed pad variant is not used; thermal dissipation relies on GND pin soldering to a large copper area.

Pin/Terminal	Circuit Role	Design Meaning
1 - IN	Regulator input supply	Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient suppression.
2 - GND	Power and signal ground	Serves as primary heat path; must connect to large PCB copper area to maintain T_J ≤ +150°C under full load.
3 - SHDN	Active-low enable control	Pulls <10nA in shutdown; drives output to high-Z (no auto-discharge - distinguishes MAX8877 from MAX8878).
4 - BP	Bypass reference node	Connects 0.01µF low-leakage ceramic cap to reduce reference noise; sets output spectral density floor.
5 - OUT	Regulated 2.5V output	Supplies up to 150mA; requires ≥1µF ceramic cap (ESR < 0.2Ω) for V_OUT ≥ 2.5V stability per datasheet.

Key Features

Feature	Design Value
P-channel MOSFET pass element	Eliminates base-drive current loss, enabling constant 100µA I_Q across all load and dropout conditions.
Reverse battery protection	Clamps reverse current to ≤1mA when IN or SHDN < GND - prevents damage in misinserted battery scenarios.
Thermal shutdown with hysteresis	Shuts down at +155°C and re-enables only after cooling by 15°C - avoids oscillation during sustained overload.
100mV-output increment options	Factory-trimmed 2.5V output (suffix "25") with ±1.4% accuracy - eliminates external feedback resistors and layout sensitivity.
Industry-standard '2982 pinout compatibility	Direct replacement for legacy regulators without PCB redesign - supports drop-in upgrade of noise-sensitive designs.

Applications

Cellular Handsets	PCMCIA Cards
Use Scenario: Powering baseband processor I/O banks and RF transceiver bias rails in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary 2.5V LDO supplying noise-sensitive analog sections with minimal PSRR degradation. Use Value: 30µV_RMS noise and 63dB PSRR at low frequency prevent AM modulation artifacts and receiver desensitization.	Use Scenario: Providing regulated 2.5V to PCMCIA card controller logic and interface buffers in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling host bus voltage, isolated from noisy main system rails. Use Value: 165mV dropout allows reliable operation even as host 3.3V rail sags during high-speed data bursts.
Hand-Held Instruments	Electronic Planners
Use Scenario: Supplying precision ADC reference and op-amp circuitry in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source for analog signal chain - directly impacts measurement resolution and offset stability. Use Value: ±1.4% output accuracy over temperature and 100µA I_Q extend battery life while maintaining 16-bit effective resolution.	Use Scenario: Powering real-time clock (RTC), SRAM backup, and touch-screen controller in PDA-class organizers. IC Role / Device Role / Timing Role: Always-on LDO maintaining critical subsystems during deep-sleep states with nanoscale shutdown current. Use Value: 10nA shutdown current enables >5-year RTC battery life using standard CR2032 coin cells.

Cellular Handsets

PCMCIA Cards

Use Scenario: Powering baseband processor I/O banks and RF transceiver bias rails in GSM/UMTS handsets.

IC Role / Device Role / Timing Role: Primary 2.5V LDO supplying noise-sensitive analog sections with minimal PSRR degradation.

Use Value: 30µV_RMS noise and 63dB PSRR at low frequency prevent AM modulation artifacts and receiver desensitization.

Use Scenario: Providing regulated 2.5V to PCMCIA card controller logic and interface buffers in laptop expansion slots.

IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling host bus voltage, isolated from noisy main system rails.

Use Value: 165mV dropout allows reliable operation even as host 3.3V rail sags during high-speed data bursts.

Hand-Held Instruments

Electronic Planners

Use Scenario: Supplying precision ADC reference and op-amp circuitry in portable multimeters and data loggers.

IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source for analog signal chain - directly impacts measurement resolution and offset stability.

Use Value: ±1.4% output accuracy over temperature and 100µA I_Q extend battery life while maintaining 16-bit effective resolution.

Use Scenario: Powering real-time clock (RTC), SRAM backup, and touch-screen controller in PDA-class organizers.

IC Role / Device Role / Timing Role: Always-on LDO maintaining critical subsystems during deep-sleep states with nanoscale shutdown current.

Use Value: 10nA shutdown current enables >5-year RTC battery life using standard CR2032 coin cells.

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
MAX8877EUK25-T	Same electrical specs, but in regular (not thin) SOT23-5 package - 1.1mm height vs. 0.95mm for EZK.	Less suitable for ultra-thin handhelds; identical thermal performance if GND pad area is matched.	Select when board stack height allows regular SOT23 and procurement favors higher-volume UK variants.
MCP1700T-2502E/MB	250mA rated, 17µV_RMS noise, but 600mV dropout at 250mA - higher quiescent current (2.5µA typical) and no reverse battery protection.	Lacks reverse polarity hardening and thermal hysteresis - requires external protection in harsh environments.	Prefer where higher current headroom is needed and input voltage margin exceeds 3.1V.

Compared with MAX8877EZK25+T, the MAX8877EUK25-T offers identical regulation performance in a slightly taller package, while the MCP1700T-2502E/MB trades lower noise for higher dropout and no reverse-battery safeguard - making MAX8877EZK25+T optimal for compact, battery-reversal-prone, noise-critical portable designs.

Availability

MAX8877EZK25+T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, hand-held instruments, and electronic planners requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX8877EZK25+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 demanding industrial, communications, and consumer applications.

The MAX8877/MAX8878 family was engineered specifically for battery-powered portable electronics, emphasizing ultra-low noise, minimal dropout, and robust fault protection - targeting design-in where reliability and runtime are non-negotiable.

FAQ

What is the maximum input voltage rating for the MAX8877EZK25+T?

The MAX8877EZK25+T has an absolute maximum input voltage of +7V relative to GND. However, its specified operating range is 2.5V to 6.5V. Exceeding 6.5V may cause functional instability or accelerated parametric drift, and operation above +7V risks permanent damage per the Absolute Maximum Ratings table in the datasheet.

Does the MAX8877EZK25+T provide auto-discharge functionality during shutdown?

No. The MAX8877EZK25+T does not include auto-discharge - that feature is exclusive to the MAX8878 series. When placed in shutdown, the MAX8877EZK25+T places its output in high-impedance state; external circuitry is required to discharge the output capacitor if rapid voltage decay is needed.

What capacitor values are required for stable operation of the MAX8877EZK25+T?

For stable operation, the MAX8877EZK25+T requires a minimum 1µF ceramic input capacitor (X5R/X7R dielectric) and a 1µF ceramic output capacitor (ESR < 0.2Ω) for its 2.5V output. A 0.01µF ceramic capacitor must be placed on the BP pin. Larger output capacitance improves transient response but does not affect basic stability.

Is the MAX8877EZK25+T pin-compatible with the industry-standard '2982 regulator?

Yes. The MAX8877EZK25+T uses the same 5-pin SOT23 pinout as the industry-standard '2982 family - IN, GND, SHDN, BP, and OUT map identically. This enables direct replacement without PCB modification, provided thermal and capacitive layout guidelines are followed.

What is the thermal resistance (θ_JB) of the MAX8877EZK25+T package?

The MAX8877EZK25+T in thin SOT23-5 package has a junction-to-board thermal resistance (θ_JB) of 110°C/W, as specified in the Absolute Maximum Ratings table. Effective thermal performance depends on GND pin soldering to a ≥25 mm² copper area; insufficient copper increases actual θ_JB and risks thermal shutdown under 150mA load.

MAX8877EZK25+T Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: SOT-23-5 Thin, TSOT-23-5

Packaging:: Bulk

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 6.5V

Voltage - Output (Min/Fixed):: 2.5V

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

MAX8877EZK25+T FAQ

1.How can I place an order for MAX8877EZK25+T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX8877EZK25+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 MAX8877EZK25+T reliable?

The price and inventory of MAX8877EZK25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK25+T is usually 5 days.

3.What payment methods are accepted for MAX8877EZK25+T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK25+T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX8877EZK25+T?

MAX8877EZK25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX8877EZK25+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 MAX8877EZK25+T?

For technical support, including MAX8877EZK25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK25+T requirements.

6.How does Aetrix verify that MAX8877EZK25+T is sourced from the original manufacturer or authorized distributors?

All MAX8877EZK25+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 MAX8877EZK25+T meets industry standards.

7.What is the process for return or replacement of MAX8877EZK25+T?

All MAX8877EZK25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK25+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 MAX8877EZK25+T part is unused and in its original packaging.

Return procedure for MAX8877EZK25+T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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