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Analog Devices Inc./Maxim Integrated MAX8877EUK18-T
- Part No.:
- MAX8877EUK18-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK18-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:42,450
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Product details
Overview
The MAX8877EUK18-T from Maxim Integrated is a low-noise, low-dropout linear regulator with a factory-preset 1.8V output, 150mA maximum output current, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current - designed for space-constrained, battery-powered portable electronics requiring stable low-voltage rail generation.
For engineers reviewing the MAX8877EUK18-T datasheet, MAX8877EUK18-T pinout, MAX8877EUK18-T application, or MAX8877EUK18-T equivalent, key selection criteria include its SOT23-5 regular package, 1.8V ±1.4% output accuracy over -40°C to +85°C, reverse battery protection, 10nA shutdown current, and compatibility with industry-standard '2982 footprint.
Technical Context
The MAX8877EUK18-T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low dropout and eliminate base-drive current loss. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin, enabling precise regulation without external resistors.
It integrates thermal shutdown (155°C trip, 15°C hysteresis), short-circuit current limiting (160mA min / 390mA max), and reverse battery protection that limits reverse current to 1mA. 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 | 1.8V ±1.4% (factory-preset; stable across -40°C to +85°C, 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 = 1.965V; extends battery life in Li-ion/alkaline systems) |
| Output Noise | 30µVRMS (10Hz–100kHz, with 0.01µF BP cap and 10µF COUT; suitable for RF, ADC, and PLL power rails) |
| Quiescent Current | 100µA (constant across load and dropout; enables >1-year battery life in always-on sensor nodes) |
| Shutdown Current | 10nA (logic-controlled active-low SHDN; reduces system standby power to negligible levels) |
| Input Voltage Range | 2.5V to 6.5V (supports single-cell Li-ion, dual-cell alkaline, and regulated 3.3V/5V supplies) |
Pinout & Package
MAX8877EUK18-T is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with GND serving as both electrical return and thermal path. PCB layout must use a large copper pour connected to Pin 2 (GND) for thermal management.
| 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 immunity |
| 2 - GND | Ground reference and thermal sink | Must connect to large PCB copper area; critical for thermal dissipation and noise rejection |
| 3 - SHDN | Active-low shutdown control | Pulled low disables regulator and reduces IQ to 10nA; tie to IN for always-on operation |
| 4 - BP | Bypass node for reference noise filtering | Connects to 0.01µF ceramic cap; forms 80Hz RC filter to suppress bandgap reference noise |
| 5 - OUT | Regulated 1.8V output | Sources up to 150mA; requires ≥1µF ceramic cap (ESR < 0.2Ω) for VOUT ≥ 2.5V; 3.3µF for lower voltages |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss; maintains 100µA IQ even in dropout or heavy-load conditions |
| Reverse battery protection | Blocks reverse current to ≤1mA when VIN or SHDN falls below GND; prevents damage in miswired battery compartments |
| Thermal shutdown with hysteresis | Shuts down at 155°C junction temperature and re-enables only after cooling by 15°C; prevents latch-up during sustained overload |
| Factory-trimmed 1.8V output | ±1.4% accuracy over full temperature/load range; eliminates need for external feedback resistors or calibration |
| Low-noise BP pin architecture | Enables 30µVRMS output noise via simple 0.01µF ceramic capacitor; avoids costly LDO post-regulation filters |
Applications
| Cellular Handset Core Logic | PCMCIA Card Power Management |
|---|---|
|
Use Scenario: Powering ARM-based application processors and memory subsystems in GSM/UMTS handsets where battery voltage drops from 4.2V to 3.0V during discharge. IC Role / Device Role / Timing Role: Primary 1.8V core LDO delivering clean, low-noise supply to CPU I/O and SRAM banks. Use Value: 165mV dropout extends usable battery capacity by ~12% compared to legacy '2982-compatible regulators; 30µVRMS noise prevents digital switching noise from coupling into sensitive analog blocks. |
Use Scenario: Providing regulated 1.8V power to JEIDA-compliant PCMCIA Type II cards inserted into laptops or industrial hosts. IC Role / Device Role / Timing Role: Standalone LDO on card edge connector interface, accepting host-supplied 3.3V or 5V and stepping down to 1.8V logic rail. Use Value: Pin-compatible replacement for '2982 footprints simplifies legacy card redesign; reverse battery protection guards against hot-swap transients and incorrect insertion. |
| Hand-Held Medical Instrumentation | Palmtop Computer Memory Supply |
|
Use Scenario: Powering precision analog front-ends (AFE) and low-power microcontrollers in portable glucose meters and pulse oximeters. IC Role / Device Role / Timing Role: Low-noise 1.8V supply for ADC reference buffers and sensor signal conditioning circuits. Use Value: 30µVRMS output noise ensures <1 LSB error in 12-bit medical-grade ADCs; 10nA shutdown current enables multi-year shelf life in battery-backed devices. |
Use Scenario: Supplying 1.8V to low-voltage SRAM and flash memory in compact palmtop computers with tight thermal envelopes. IC Role / Device Role / Timing Role: Dedicated memory rail LDO decoupled from main system regulator to isolate digital noise. Use Value: SOT23-5 regular package fits high-density layouts; 100µA quiescent current minimizes self-heating during extended idle states, preserving memory data retention. |
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 |
|---|---|---|---|
| TPS76318DBVR | Higher 220mV dropout at 150mA; 40µVRMS noise; 85µA IQ; same SOT23-5 package | Lacks reverse battery protection and BP noise-filtering pin; requires external compensation for some capacitors | Preferred where cost sensitivity outweighs noise and protection requirements |
| MCP1700T-1802E/MB | 180mV dropout at 150mA; 35µVRMS noise; 1.6µA IQ (no-load); SOT23-3 package (different pinout) | 3-pin design omits SHDN and BP pins; no thermal shutdown hysteresis or reverse battery protection | Selected for ultra-low-quiescent applications where shutdown control and noise filtering are not required |
Compared with TPS76318DBVR and MCP1700T-1802E/MB, the MAX8877EUK18-T delivers superior noise performance and integrated protections (reverse battery, thermal hysteresis, BP filtering) in a pin-compatible '2982 footprint - making it optimal for redesigns of legacy portable equipment where reliability and signal integrity are prioritized over minimal IQ.
Availability
MAX8877EUK18-T is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, and hand-held instrumentation requiring stable component supply, long-lifecycle support, and guaranteed parametric compliance across industrial temperature ranges.
Supply support for MAX8877EUK18-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 product line was engineered specifically for battery-powered portable electronics needing ultra-low noise, low dropout, and robust protection - targeting cellular handsets, palmtops, and modular peripherals where size, efficiency, and reliability are critical.
FAQ
What is the output voltage tolerance of the MAX8877EUK18-T over temperature and load?
The MAX8877EUK18-T guarantees ±1.4% output voltage accuracy across the full operating range of -40°C to +85°C and for load currents from 0.1mA to 120mA. At 25°C and 0.1mA load, the tolerance tightens to ±1.4% (not ±1.0%), and the device maintains this spec without external trimming - confirmed in the Electrical Characteristics table of the official datasheet.
Does the MAX8877EUK18-T include thermal shutdown protection?
Yes, the MAX8877EUK18-T incorporates thermal-overload protection that activates at a junction temperature of 155°C and includes 15°C hysteresis. Once triggered, the pass transistor shuts off until the die cools sufficiently, preventing permanent damage during sustained overload or poor PCB thermal design - a feature explicitly documented in the Absolute Maximum Ratings and Electrical Characteristics sections.
Can the MAX8877EUK18-T be used with ceramic output capacitors?
Yes, the MAX8877EUK18-T is fully compatible with ceramic output capacitors. For VOUT = 1.8V (which is <2.5V), the datasheet specifies a minimum 3.3µF X7R/X5R ceramic capacitor with ESR < 0.2Ω. Using Z5U/Y5V dielectrics may require ≥2× capacitance for stability below -10°C, per the Applications Information section.
What is the purpose of the BP pin on the MAX8877EUK18-T?
The BP (bypass) pin on the MAX8877EUK18-T connects to an internal 200kΩ resistor forming an 80Hz low-pass filter with an external 0.01µF ceramic capacitor. This configuration suppresses bandgap reference noise, enabling the specified 30µVRMS output noise - a function confirmed in the Pin Description, Detailed Description, and Typical Operating Characteristics sections.
Is the MAX8877EUK18-T pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EUK18-T is explicitly designed as a pin-compatible upgrade to the industry-standard '2982 family. Its SOT23-5 regular package matches the '2982 footprint, and all five pins (IN, GND, SHDN, BP, OUT) map directly - enabling drop-in replacement in existing designs while improving dropout voltage, noise, and protection features, as stated in the General Description and Pin Configuration diagrams.
MAX8877EUK18-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- 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
MAX8877EUK18-T FAQ
1.How can I place an order for MAX8877EUK18-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK18-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 MAX8877EUK18-T reliable?
The price and inventory of MAX8877EUK18-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK18-T is usually 5 days.
3.What payment methods are accepted for MAX8877EUK18-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK18-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK18-T?
MAX8877EUK18-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK18-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 MAX8877EUK18-T?
For technical support, including MAX8877EUK18-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK18-T requirements.
6.How does Aetrix verify that MAX8877EUK18-T is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK18-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 MAX8877EUK18-T meets industry standards.
7.What is the process for return or replacement of MAX8877EUK18-T?
All MAX8877EUK18-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK18-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 MAX8877EUK18-T part is unused and in its original packaging.
Return procedure for MAX8877EUK18-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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