Analog Devices Inc./Maxim Integrated MAX8887EZK18+T

Overview

MAX8887EZK18+T from Maxim Integrated is a low-noise, 300mA low-dropout linear regulator with fixed 1.8V output, 2.5V–5.5V input range, and 100mV dropout at 200mA - designed for power-sensitive portable systems including cellular phones, PDAs, and digital cameras.

For engineers reviewing the MAX8887EZK18+T datasheet, MAX8887EZK18+T pinout, MAX8887EZK18+T application, or MAX8887EZK18+T equivalent, this page delivers verified electrical parameters, SOT23-5 pin mapping, thermal/short-circuit protection behavior, noise performance (42µVRMS), and real-world selection guidance against comparable LDOs.

Technical Context

The MAX8887EZK18+T uses an internal PMOS pass transistor to achieve load-independent 55µA quiescent current and low 100mV dropout at 200mA - enabling extended battery life in deep-discharge conditions. Its reference bypass (BP) pin supports external 0.01µF capacitor filtering to suppress internal reference noise.

Unlike NPN/PNP-based LDOs, it avoids base-drive losses in dropout and maintains stable regulation down to VIN = VOUT + 100mV. It features active-low shutdown (0.1µA I_Q), ±2% output voltage accuracy over temperature and load, and integrated foldback current limiting (420mA typical at V_OUT > 93% nominal).

Key Specifications

Pinout & Package

MAX8887EZK18+T is housed in a thin 5-pin SOT23 package (1mm height), optimized for space-constrained portable PCBs with minimal thermal mass.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, 300mA LDO applications.

Compared with XC6206P182MR and AP2204K-18W5, the MAX8887EZK18+T uniquely delivers 42µVRMS noise via BP pin filtering and 100mV dropout at 200mA - making it the only option among the three qualified for noise-sensitive analog subsystems and deep-battery-operation scenarios.

Availability

MAX8887EZK18+T is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, PDAs, PCMCIA cards, and handheld instruments requiring stable component supply with RoHS-compliant packaging and guaranteed -40°C to +85°C operation.

Supply support for MAX8887EZK18+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 MAX8887/MAX8888 product line was engineered specifically for battery-powered portable electronics - prioritizing ultra-low quiescent current, low-noise regulation, and compact SOT23 packaging to extend runtime and simplify layout in space-constrained designs.

FAQ

What is the maximum input voltage rating for MAX8887EZK18+T?

The MAX8887EZK18+T has an absolute maximum input voltage of +7V referenced to GND, but its functional operating range is specified from 2.5V to 5.5V. Operation above 5.5V risks permanent damage, and the device includes input undervoltage lockout that activates below 2.15V (typical) to prevent unstable regulation during brownout conditions. The MAX8887EZK18+T must be used within these bounds to ensure reliability and specification compliance.

Does MAX8887EZK18+T include power-good (POK) functionality?

No, the MAX8887EZK18+T does not include a power-good (POK) output. That feature is exclusive to the MAX8888 family variants (e.g., MAX8888EZK18+T). The MAX8887EZK18+T is the low-noise variant and substitutes the POK pin with a BP (bypass) pin for noise reduction. If POK signaling is required, the MAX8888EZK18+T - which shares identical output voltage, current, and package - should be selected instead.

What capacitor values are required for stable operation of MAX8887EZK18+T?

For stable operation, the MAX8887EZK18+T requires a 2.2µF ceramic capacitor (ESR < 0.1Ω) between IN and GND, and another 2.2µF ceramic capacitor between OUT and GND. Additionally, a 0.01µF ceramic capacitor must be placed between BP and GND to achieve the specified 42µVRMS output noise. All capacitors must be placed as close as possible to their respective pins to minimize trace inductance and ensure optimal transient response and PSRR performance.

How does the shutdown function operate on MAX8887EZK18+T?

The MAX8887EZK18+T enters ultra-low-power shutdown when the SHDN pin is driven logic-low (<0.6V), reducing total supply current to 0.1µA (typical). During shutdown, the OUT pin is actively discharged through an internal ~800Ω resistor, and regulation ceases. To resume operation, SHDN must be pulled high - typically to IN - with VIH ≥ 1.6V. The SHDN input tolerates voltages up to 6V independently of VIN or VOUT, allowing flexible control from higher-voltage logic domains.

Is MAX8887EZK18+T RoHS-compliant and lead-free?

Yes, the "+T" suffix in MAX8887EZK18+T explicitly denotes a lead(Pb)-free, RoHS-compliant package per Maxim's ordering nomenclature. It is supplied in a standard 5-pin SOT23 package (package code Z5-1) with matte-tin lead finish, qualified for reflow soldering per JEDEC J-STD-020. No lead-containing alternatives are offered for this part number, and full RoHS documentation is available through Maxim's (Analog Devices) component database.