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Analog Devices Inc./Maxim Integrated MAX8877EZK18-T
- Part No.:
- MAX8877EZK18-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8877EZK18-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX8877EZK18-T from Maxim Integrated is a low-noise, low-dropout linear regulator with 1.8V preset output, 150mA max output current, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current - designed for space-constrained battery-powered systems such as handheld instruments and PCMCIA cards.
For engineers reviewing the MAX8877EZK18-T datasheet, MAX8877EZK18-T pinout, MAX8877EZK18-T application, or MAX8877EZK18-T equivalent, key selection criteria include guaranteed ±1.4% output voltage accuracy over -40°C to +85°C, reverse battery protection, thermal shutdown at 155°C, and compatibility with 0.01µF BP bypass capacitor for noise reduction.
Technical Context
The MAX8877EZK18-T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling ultra-low quiescent current independent of load or dropout condition. 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 standby), short-circuit and thermal-overload protection (15°C hysteresis), and reverse battery protection limiting reverse current to 1mA. Unlike the MAX8878 variant, it lacks auto-discharge functionality on SHDN assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.80V ±1.4% (factory-preset; stable across -40°C to +85°C and 0.1–120mA load) |
| Max Output Current | 150mA (continuous; current limit minimum 160mA, maximum 390mA) |
| Dropout Voltage | 165mV at 150mA (enables operation down to VIN = 1.965V for regulated 1.8V output) |
| Output Noise | 30µVRMS (10Hz–100kHz; reduced further with 0.01µF BP capacitor) |
| Supply Current | 100µA (operating; constant across load, input voltage, and dropout conditions) |
| Shutdown Current | 10nA (logic-low SHDN; enables ultra-low-power system sleep modes) |
| Input Voltage Range | 2.5V to 6.5V (supports single-cell Li-ion, multi-cell alkaline, and regulated intermediate rails) |
Pinout & Package
MAX8877EZK18-T is housed in a 5-pin thin SOT23 package (JEDEC MO-178AA), optimized for thermal performance (θJB = 110°C/W) and PCB area savings in portable designs. The GND pin serves dual electrical and thermal functions and must be soldered to a large copper pour.
| 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 rejection |
| 2 - GND | Power ground and thermal path | Primary heat dissipation node; must connect to large PCB copper area to sustain 727mW max power at +70°C |
| 3 - SHDN | Active-low enable control | Pulls to GND to enter 10nA shutdown; open or tied to IN for normal operation; no auto-discharge function |
| 4 - BP | Bypass reference noise filter | Connects to 0.01µF ceramic capacitor to reduce output noise; forms 80Hz low-pass filter with internal 200kΩ resistor |
| 5 - OUT | Regulated output | Delivers up to 150mA; requires ≥3.3µF ceramic capacitor (ESR <0.2Ω) for VOUT <2.5V stability |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss; maintains 100µA IQ across all load and dropout conditions |
| Reverse battery protection | Blocks >99% of reverse current (<1mA) when IN or SHDN falls below GND - prevents damage in miswired battery compartments |
| Thermal shutdown with hysteresis | Shuts down at 155°C junction temperature; re-enables only after 15°C cooldown - prevents thermal runaway during sustained overload |
| Factory-trimmed output accuracy | ±1.4% over full temperature and load range - eliminates need for external feedback resistors or post-production calibration |
| Low-noise BP pin architecture | Enables 30µVRMS output noise with minimal 0.01µF external capacitor - suitable for RF, ADC, and precision analog supply domains |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by two AA/AAA cells with tight board space constraints. IC Role / Device Role / Timing Role: Primary 1.8V supply for microcontroller, display driver, and precision ADC front-end. Use Value: 165mV dropout extends usable battery life by >15% compared to legacy '2982-compatible regulators; 30µVRMS noise avoids ADC quantization errors. |
Use Scenario: Hot-pluggable PCMCIA memory or modem cards requiring fast, clean power sequencing. IC Role / Device Role / Timing Role: Local 1.8V LDO for card controller ICs and interface buffers during insertion/removal transients. Use Value: 10nA shutdown current prevents battery drain when card is ejected; reverse battery protection safeguards against accidental polarity reversal during hot-swap. |
| Palmtop Computers | Electronic Planners |
Use Scenario: Legacy palmtop PDAs with 2.5–3.6V battery inputs powering 1.8V core logic and SRAM. IC Role / Device Role / Timing Role: Core voltage regulator for ARM7 or MIPS-based application processors and memory subsystems. Use Value: Constant 100µA supply current ensures predictable battery runtime estimation; thermal shutdown prevents overheating during extended CPU bursts. |
Use Scenario: Low-cost electronic organizers with coin-cell or button-cell batteries and minimal PCB real estate. IC Role / Device Role / Timing Role: Single-component 1.8V supply for LCD controller, real-time clock, and flash memory interface. Use Value: Thin SOT23-5 footprint (2.9mm × 1.6mm) fits narrow board edges; ±1.4% output accuracy guarantees reliable SRAM retention down to end-of-battery-life. |
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 |
|---|---|---|---|
| MAX8877EUK18-T | Same electrical specs; packaged in regular (not thin) SOT23-5 with θJB = 140°C/W | Higher thermal resistance limits power handling in high-ambient or sealed enclosures | Select when standard SOT23 footprint is required and thermal margin exceeds 571mW at +70°C |
| TCS2118-1.8V | 1.8V output, 200mA rating, 250mV dropout at 200mA, 45µVRMS noise, 150µA IQ | Higher noise and dropout; no reverse battery protection or BP pin | Consider only if higher output current is mandatory and noise/thermal/battery-reversal robustness are secondary |
Compared with MAX8877EZK18-T, the MAX8877EUK18-T trades thinner profile and better thermal performance for standard SOT23 compatibility, while the TCS2118-1.8V sacrifices noise, dropout, and protection features for marginal current increase - making MAX8877EZK18-T optimal for compact, battery-critical, low-noise applications.
Availability
MAX8877EZK18-T is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, and palmtop computers requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance across industrial temperature ranges.
Supply support for MAX8877EZK18-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 engineered specifically for battery-powered portable electronics demanding ultra-low noise, minimal quiescent current, and robust fault protection in miniature packages.
FAQ
What is the guaranteed output voltage tolerance for MAX8877EZK18-T over temperature and load?
The MAX8877EZK18-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. This specification is production-tested and applies to both 1.8V nominal output and all other factory-preset voltages in the MAX8877 family.
Does MAX8877EZK18-T include auto-discharge functionality during shutdown?
No. MAX8877EZK18-T does not include auto-discharge. That feature is exclusive to the MAX8878 variant (e.g., MAX8878EZK18-T). When MAX8877EZK18-T enters shutdown via the SHDN pin, the output remains floating and retains its voltage until discharged externally or through load leakage.
What is the recommended output capacitor for MAX8877EZK18-T given its 1.8V output?
For MAX8877EZK18-T (1.8V output), a minimum 3.3µF ceramic capacitor with ESR <0.2Ω is required on the OUT pin. X5R or X7R dielectrics are preferred; Z5U/Y5V types may require ≥6.6µF to ensure stability below -10°C due to capacitance drift.
How does the BP pin function in MAX8877EZK18-T, and what capacitor value is optimal?
The BP pin in MAX8877EZK18-T connects internally to a 200kΩ resistor forming an 80Hz low-pass filter that reduces reference noise. A 0.01µF ceramic capacitor is optimal: larger values (e.g., >0.1µF) increase startup time without meaningful noise reduction, as confirmed by MAX8877-14 characterization data.
Can MAX8877EZK18-T operate from a 2.5V input while delivering 1.8V at 150mA?
Yes. With a 165mV dropout at 150mA, MAX8877EZK18-T requires only VIN ≥ 1.965V to maintain regulation. A 2.5V input provides 535mV headroom - well above minimum - enabling stable operation, good PSRR, and margin for line transients per Figure MAX8877-18.
MAX8877EZK18-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):
- 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:
- TSOT-23-5
MAX8877EZK18-T FAQ
1.How can I place an order for MAX8877EZK18-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EZK18-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 MAX8877EZK18-T reliable?
The price and inventory of MAX8877EZK18-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK18-T is usually 5 days.
3.What payment methods are accepted for MAX8877EZK18-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK18-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EZK18-T?
MAX8877EZK18-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EZK18-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 MAX8877EZK18-T?
For technical support, including MAX8877EZK18-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK18-T requirements.
6.How does Aetrix verify that MAX8877EZK18-T is sourced from the original manufacturer or authorized distributors?
All MAX8877EZK18-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 MAX8877EZK18-T meets industry standards.
7.What is the process for return or replacement of MAX8877EZK18-T?
All MAX8877EZK18-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK18-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 MAX8877EZK18-T part is unused and in its original packaging.
Return procedure for MAX8877EZK18-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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