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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 LIN 1.8V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,904
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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 maximum 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 precision voltage source in battery-powered handheld instruments.
For engineers reviewing the MAX8877EZK18+T datasheet, MAX8877EZK18+T pinout, MAX8877EZK18+T application, or MAX8877EZK18+T equivalent, key selection criteria include dropout performance at 150mA, shutdown current (10nA), reverse battery protection, thermal shutdown behavior, and BP-capacitor–dependent noise reduction.
Technical Context
The MAX8877EZK18+T integrates a 1.25V bandgap reference, error amplifier, and internal feedback divider to regulate its factory-preset 1.8V output. Its P-channel MOSFET pass transistor eliminates base-drive current, enabling stable 100µA quiescent current across load and dropout conditions.
It features logic-controlled active-low SHDN with 10nA shutdown current, reverse battery protection limiting reverse current to 1mA, and thermal shutdown at +155°C with 15°C hysteresis. The BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter that reduces reference noise, directly lowering output voltage noise to 30µVRMS (10Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V ±1.4% (factory-preset; no external resistors required) |
| Max Output Current | 150mA (supports compact portable loads without external current boosting) |
| Dropout Voltage | 165mV at 150mA (enables operation down to VIN = 1.965V for full-load 1.8V output) |
| Output Noise | 30µVRMS (10Hz–100kHz, with 0.01µF BP cap; suitable for RF/ADC power rails) |
| Quiescent Current | 100µA (constant across load and dropout; extends battery life in always-on systems) |
| Shutdown Current | 10nA (ultra-low leakage during system sleep; critical for multi-year battery life) |
| Input Voltage Range | 2.5V to 6.5V (compatible with single Li-ion, dual Alkaline/NiMH, or regulated 3.3V/5V rails) |
Pinout & Package
MAX8877EZK18+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 return and thermal path-requiring connection to a large PCB copper area 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 pad | Must be soldered to large PCB ground plane to dissipate heat and maintain <110°C/W θJB |
| 3 SHDN | Active-low enable/shutdown control | Pulled low to enter 10nA shutdown; tied high to IN for always-on operation |
| 4 BP | Bypass capacitor connection for reference noise filtering | Requires 0.01µF low-leakage ceramic cap; forms 80Hz RC filter to reduce output noise by >50% |
| 5 OUT | Regulated 1.8V output | Delivers up to 150mA; requires ≥3.3µF ceramic cap (ESR <0.2Ω) for VOUT <2.5V stability |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling constant 100µA IQ regardless of load or dropout condition |
| Reverse battery protection | Clamps 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 and re-enables only after cooling by 15°C-prevents thermal runaway during sustained overload |
| Factory-preset 1.8V output | ±1.4% accuracy over -40°C to +85°C eliminates external resistor network and layout complexity |
| Low-noise BP pin architecture | 0.01µF BP capacitor reduces integrated output noise to 30µVRMS-critical for powering PLLs and precision ADCs |
Applications
| Hand-Held Instruments | Palmtop Computers |
|---|---|
|
Use Scenario: Portable multimeters and data loggers powered by two AA cells with variable discharge profile. IC Role / Device Role / Timing Role: Primary 1.8V supply for microcontroller core and precision analog front-end. Use Value: 165mV dropout allows >10% longer runtime vs. legacy '2982 regulators before brownout at end-of-battery life. |
Use Scenario: Compact palmtop devices requiring clean 1.8V for ARM-based SoC I/O and memory interfaces. IC Role / Device Role / Timing Role: Low-noise post-regulator for DDR I/O supply rail adjacent to high-speed digital traces. Use Value: 30µVRMS noise ensures <0.1% gain error in 12-bit ADC subsystems and prevents clock jitter in integrated PLLs. |
| Electronic Planners | PCMCIA Cards |
|
Use Scenario: Battery-backed PDAs with real-time clock, touch controller, and flash memory-all supplied from single-cell Li-ion. IC Role / Device Role / Timing Role: Always-on 1.8V rail maintaining RTC and SRAM retention during deep sleep. Use Value: 10nA shutdown current enables >5-year battery shelf life without compromising wake-up responsiveness. |
Use Scenario: Hot-pluggable PCMCIA cards drawing burst current during card initialization and data transfer. IC Role / Device Role / Timing Role: Local 1.8V regulator isolating host bus noise from sensitive card logic. Use Value: 150mA current limit and short-circuit protection prevent host bus collapse during card insertion faults. |
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 |
|---|---|---|---|
| TPS76318DBVR | Higher 250mV dropout at 150mA; 50µVRMS noise; no reverse battery protection | Lacks reverse polarity hardening-requires external diode in battery-input designs | Choose if board space permits larger dropout margin and external protection is acceptable |
| MCP1700T-1802E/TT | 125mV dropout at 250mA; 40µVRMS noise; 1.6µA quiescent current (no shutdown) | No logic-controlled shutdown-unsuitable for ultra-low-power sleep modes | Prefer for cost-sensitive, non-shutdown applications where lower dropout outweighs noise and shutdown needs |
Compared with TPS76318DBVR and MCP1700T-1802E/TT, the MAX8877EZK18+T uniquely combines ultra-low shutdown current (10nA), reverse battery protection, and sub-35µVRMS noise in a thin SOT23-making it optimal for space- and battery-life–constrained portable instrumentation.
Availability
MAX8877EZK18+T is available at Aetrix Electronics and suitable for hand-held instruments, palmtop computers, electronic planners, and PCMCIA cards requiring stable component supply with guaranteed long-term manufacturability.
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) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and portable applications.
The MAX8877/MAX8878 family targets battery-powered systems needing ultra-low IQ, low noise, and robust fault protection-specifically addressing runtime extension and signal integrity in handheld measurement and computing devices.
FAQ
What is the output voltage tolerance of the MAX8877EZK18+T over temperature and load?
The MAX8877EZK18+T guarantees ±1.4% output voltage accuracy across -40°C to +85°C ambient temperature and 0.1mA to 120mA load current. At room temperature and light load (0.1mA), typical deviation is ±1.0%; worst-case drift remains bounded within the ±1.4% specification band under full operating conditions.
Does the MAX8877EZK18+T require an external BP capacitor, and what happens if it's omitted?
Yes-the MAX8877EZK18+T requires a 0.01µF ceramic capacitor on the BP pin to achieve its specified 30µVRMS output noise. Omitting it increases integrated noise to ~70µVRMS due to unfiltered reference noise coupling into the error amplifier, degrading performance in noise-sensitive analog circuits.
Can the MAX8877EZK18+T operate with a 2.4V input supply?
No-the MAX8877EZK18+T has a minimum input voltage of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. At 2.4V input, the device cannot regulate 1.8V output and will drop out completely, delivering only ~1.6V or less depending on load and internal headroom.
How does the thermal shutdown behavior of the MAX8877EZK18+T affect system reliability?
The MAX8877EZK18+T shuts down at +155°C junction temperature and re-enables only after cooling by 15°C. This hysteresis prevents oscillatory cycling during overload, allowing safe thermal recovery. Combined with its 727mW max power dissipation in thin SOT23, this protects against permanent damage during sustained short-circuit or high-ambient conditions.
Is the MAX8877EZK18+T pin-compatible with the industry-standard '2982 regulator?
Yes-the MAX8877EZK18+T uses the same 5-pin SOT23 pinout as the industry-standard µA78Lxx and MC78Lxx series (collectively referenced as '2982). Pin-for-pin compatibility enables drop-in replacement without PCB redesign, while delivering improved dropout, lower noise, and enhanced protection features.
MAX8877EZK18+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:
- 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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