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Analog Devices Inc./Maxim Integrated MAX8877EUK25+T
- Part No.:
- MAX8877EUK25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK25+T.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,780
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Product details
Overview
MAX8877EUK25+T from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 2.5V 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, clean power under light-to-moderate loads.
For engineers reviewing the MAX8877EUK25+T datasheet, MAX8877EUK25+T pinout, MAX8877EUK25+T application, or MAX8877EUK25+T equivalent, key selection criteria include its SOT23-5 package compatibility with '2982, ±1.4% output voltage accuracy over temperature, reverse battery protection, and logic-controlled 10nA shutdown mode - all critical for space-constrained, low-power embedded systems.
Technical Context
The MAX8877EUK25+T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling low quiescent current across operating conditions. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin, maintaining regulation without external resistors.
It integrates thermal shutdown (155°C trip, 15°C hysteresis), short-circuit protection, and reverse battery protection that limits reverse current to 1mA. Unlike the MAX8878 variant, it lacks auto-discharge - shutdown places the output in high-impedance state without active discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.4% over -40°C to +85°C - eliminates need for external feedback resistors and ensures precision rail generation. |
| Max Output Current | 150mA continuous - supports moderate-power microcontrollers, RF front-ends, and analog sensors in portable devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 2.665V, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets stringent noise requirements for ADC references and RF LDO applications. |
| Quiescent Current | 100µA at full load and in dropout - maintains efficiency during deep discharge and standby, critical for always-on subsystems. |
| Shutdown Current | 10nA logic-controlled shutdown - reduces system leakage to negligible levels during sleep modes. |
| Input Voltage Range | 2.5V to 6.5V - compatible with single-cell Li-ion (2.7–4.2V), LiFePO4, and dual-alkaline/AAA sources. |
Pinout & Package
MAX8877EUK25+T is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with GND serving as both electrical return and thermal path. The package is RoHS-compliant and optimized for reflow soldering on compact PCBs.
| 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 | Ground reference and thermal sink | Must be connected to large copper area or ground plane to manage power dissipation and ensure thermal reliability. |
| 3 - SHDN | Active-low enable/shutdown control | Pulled low (<0.4V) disables regulator and reduces IQ to 10nA; 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; forms 80Hz low-pass filter with internal 200kΩ resistor. |
| 5 - OUT | Regulated 2.5V output | Supplies up to 150mA; requires ≥1µF ceramic capacitor (ESR <0.2Ω) for VOUT ≥2.5V to ensure stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling constant 100µA IQ across load and dropout - extends battery runtime vs. PNP-based regulators. |
| Reverse battery protection | Clamps reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage during incorrect battery insertion in consumer handhelds. |
| Thermal shutdown with hysteresis | Shuts down at 155°C junction temperature and restarts after 15°C cooldown - provides self-recovering fault protection without external circuitry. |
| Pin-compatible with '2982 | Direct drop-in replacement for legacy industry-standard regulators - avoids PCB redesign in cost-sensitive upgrades. |
| Low-noise BP pin architecture | Enables 30µVRMS output noise via simple 0.01µF capacitor - satisfies noise-sensitive analog and mixed-signal ICs without additional filtering stages. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor core voltage and RF transceiver bias rails in GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary 2.5V LDO supplying noise-sensitive analog blocks and digital logic domains. Use Value: 30µVRMS noise and 165mV dropout preserve signal integrity and extend talk time by enabling operation until battery reaches 2.665V. |
Use Scenario: Providing regulated 2.5V supply to PCMCIA card controllers and interface logic in laptops and industrial terminals. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling host bus voltage and isolating card-specific power domains. Use Value: 10nA shutdown current and reverse battery protection prevent parasitic drain and field failures during hot-swap insertion/removal. |
| Hand-Held Instruments | Electronic Planners |
|
Use Scenario: Supplying precision ADC reference and sensor signal conditioning circuitry in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise, high-accuracy voltage source for analog front-end components requiring stable DC bias. Use Value: ±1.4% output accuracy over -40°C to +85°C and minimal load/line regulation (0.04%/mA, 0.15%/V) ensure measurement repeatability across environmental conditions. |
Use Scenario: Powering real-time clock (RTC), memory backup, and low-power microcontroller in PDAs and scheduling assistants. IC Role / Device Role / Timing Role: Always-on LDO maintaining critical subsystems during main processor sleep cycles. Use Value: 100µA quiescent current and 10nA shutdown mode minimize battery depletion during extended idle periods - enabling multi-week standby life. |
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 |
|---|---|---|---|
| MAX8878EUK25+T | Includes auto-discharge function; otherwise identical specs and pinout. | Required where rapid output discharge during shutdown is needed (e.g., to meet system-level reset timing). | Select MAX8878EUK25+T only if active discharge is mandatory; MAX8877EUK25+T is preferred for zero-output-leakage shutdown. |
| MCP1700T-2502E/MB | Higher 170mV dropout at 150mA; 25µVRMS noise; no reverse battery protection. | Suitable for cost-sensitive, non-battery-reversal-prone applications with relaxed dropout and protection requirements. | Choose MCP1700T-2502E/MB only if reverse protection is handled externally and 5mV higher dropout is acceptable. |
Compared with MAX8878EUK25+T, the MAX8877EUK25+T offers identical regulation performance but omits auto-discharge - simplifying design where output hold-up is beneficial. Against MCP1700T-2502E/MB, it delivers superior reverse protection and lower dropout, justifying use in premium portable equipment despite higher BOM cost.
Availability
MAX8877EUK25+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 traceable sourcing.
Supply support for MAX8877EUK25+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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX8877/MAX8878 family was engineered specifically for battery-powered portable electronics needing ultra-low noise, low quiescent current, and robust protection - targeting cellular phones, handheld instruments, and PCMCIA peripherals.
FAQ
What is the output voltage tolerance of the MAX8877EUK25+T over temperature?
The MAX8877EUK25+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 validated over temperature via SQC correlation methods - ensuring reliable 2.5V rail generation for precision analog circuits without external trimming.
Does the MAX8877EUK25+T include thermal shutdown protection?
Yes, the MAX8877EUK25+T incorporates thermal-overload protection that activates at a junction temperature of 155°C and includes 15°C hysteresis. When triggered, the pass transistor shuts off to allow cooling; it automatically resumes regulation once the die cools to 140°C. This behavior is fully specified in the Absolute Maximum Ratings and Electrical Characteristics sections and applies across the full -40°C to +85°C ambient range.
Can the MAX8877EUK25+T be used with input voltages below 2.5V?
No - the MAX8877EUK25+T has a minimum input voltage rating of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this violates the device's operational specification and may result in loss of regulation or undefined behavior. For sub-2.5V inputs, alternative regulators such as the MAX8860 series must be considered.
What capacitor values are required for stable operation of the MAX8877EUK25+T?
For stable operation, the MAX8877EUK25+T requires a minimum 1µF ceramic input capacitor (X7R/X5R dielectric) and a minimum 1µF ceramic output capacitor with ESR <0.2Ω. The BP pin requires a 0.01µF ceramic capacitor. These values are specified in the Applications Information section and validated across temperature and load for VOUT = 2.5V - using smaller or higher-ESR capacitors risks instability or degraded transient response.
Is the MAX8877EUK25+T pin-compatible with the industry-standard '2982 regulator?
Yes - the MAX8877EUK25+T is explicitly designed as a pin-compatible upgrade to the industry-standard '2982 regulator, sharing identical SOT23-5 pinout, footprint, and terminal functions. This compatibility is stated in the General Description and Pin Configuration sections, enabling direct replacement without PCB modification while delivering improved dropout voltage and lower noise.
MAX8877EUK25+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):
- 2.5V
- 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:
- SOT-23-5
MAX8877EUK25+T FAQ
1.How can I place an order for MAX8877EUK25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK25+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 MAX8877EUK25+T reliable?
The price and inventory of MAX8877EUK25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK25+T is usually 5 days.
3.What payment methods are accepted for MAX8877EUK25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK25+T?
MAX8877EUK25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK25+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 MAX8877EUK25+T?
For technical support, including MAX8877EUK25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK25+T requirements.
6.How does Aetrix verify that MAX8877EUK25+T is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK25+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 MAX8877EUK25+T meets industry standards.
7.What is the process for return or replacement of MAX8877EUK25+T?
All MAX8877EUK25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK25+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 MAX8877EUK25+T part is unused and in its original packaging.
Return procedure for MAX8877EUK25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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