Analog Devices Inc./Maxim Integrated MAX8867EZK30+T

Overview

MAX8867EZK30+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 3.0V preset output, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load. It uses an internal P-channel MOSFET pass transistor, operates from 2.5V to 6.5V input, and delivers stable voltage for battery-powered portable electronics requiring ultra-low quiescent current and high PSRR.

For engineers reviewing the MAX8867EZK30+T datasheet, MAX8867EZK30+T pinout, MAX8867EZK30+T application, or MAX8867EZK30+T equivalent, this page provides verified technical context, pin-level design meaning, real-world application mapping, and validated alternative options for portable power management designs.

Technical Context

The MAX8867EZK30+T integrates a 1.25V bandgap reference, error amplifier, and internal feedback divider to maintain ±1.4% output accuracy across -40°C to +85°C. Its P-channel MOSFET pass element enables 100µA operating supply current independent of load or dropout condition.

It features logic-controlled shutdown (10nA IQ), reverse battery protection (1mA max reverse current), thermal shutdown at +155°C with 15°C hysteresis, and short-circuit protection. The BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter that reduces output noise to 30µVRMS (10Hz–100kHz).

Key Specifications

Pinout & Package

SOT23-5 thin package (1.6mm × 1.6mm × 0.95mm height), thermally enhanced with GND pin serving as heatsink. Requires soldering to large PCB ground plane for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO applications.

Compared with MAX8867EZK30+T, the MAX8867EUK30+T offers identical regulation performance but reduced thermal efficiency due to taller package geometry, while the XC6206P302MR-G trades off 185mV higher dropout and +10µVRMS noise for 99% lower quiescent current - making it viable only in non-noise-sensitive, ultra-low-IQ roles.

Availability

MAX8867EZK30+T is available at Aetrix Electronics and suitable for cellular telephones, palmtop computers, PCMCIA cards, and hand-held instruments requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX8867EZK30+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 portable applications.

The MAX8867/MAX8868 product line was designed specifically for battery-powered portable electronics needing ultra-low noise, low dropout, and robust protection - targeting cellular handsets, PDAs, and compact instrumentation where space, efficiency, and reliability are critical.

FAQ

What is the exact output voltage tolerance of the MAX8867EZK30+T over temperature?

The MAX8867EZK30+T guarantees ±1.4% output voltage accuracy over the full -40°C to +85°C operating temperature range, with typical deviation under ±0.5% at +25°C. This specification is production-tested and correlation-validated per Maxim's SQC methodology, ensuring consistent performance without post-manufacturing calibration for the MAX8867EZK30+T.

Does the MAX8867EZK30+T include auto-discharge functionality?

No, the MAX8867EZK30+T does not include auto-discharge. That feature is exclusive to the MAX8868 variant (e.g., MAX8868EZK30+T). The MAX8867EZK30+T enters 10nA shutdown when SHDN is pulled low but leaves the output floating; external discharge circuitry is required if rapid VOUT decay is needed during shutdown.

What capacitor types and values are mandatory for stable operation of the MAX8867EZK30+T?

For stable operation, the MAX8867EZK30+T requires a minimum 1µF X7R or X5R ceramic capacitor on both IN and OUT pins, plus a 0.01µF ceramic capacitor on the BP pin. Tantalum capacitors require ≥2.2µF and low ESR to remain within the stable region across temperature; Z5U/Y5V dielectrics are not recommended due to capacitance drift below -10°C.

How does the BP pin affect startup time and noise performance in the MAX8867EZK30+T?

In the MAX8867EZK30+T, the BP pin connects to an internal 200kΩ resistor forming an RC filter with the external capacitor. A 0.01µF BP capacitor achieves optimal 30µVRMS noise and minimal startup delay (~300µs). Increasing BP capacitance beyond 0.1µF yields negligible noise reduction but significantly increases startup time - values above 0.1µF are not recommended per Maxim's characterization data for the MAX8867EZK30+T.

Can the MAX8867EZK30+T be used with input voltages below 2.5V?

No, the MAX8867EZK30+T has an absolute minimum input voltage rating of 2.5V. Operation below this violates Absolute Maximum Ratings and may cause improper regulation, increased dropout, or failure to maintain 3.0V output. At 3.0V output, the lowest functional input is 3.165V (3.0V + 165mV dropout); inputs between 2.5V and 3.165V result in unregulated or undefined behavior for the MAX8867EZK30+T.