Analog Devices Inc./Maxim Integrated MAX8510ETA28+T

Overview

MAX8510ETA28+T from Maxim Integrated is a 2.8V fixed-output, ultra-low-noise, low-dropout linear regulator delivering up to 120mA with 120mV dropout at full load, 11μVRMS output noise (100Hz–100kHz), and 78dB PSRR at 1kHz - designed for powering sensitive analog circuitry in portable RF systems.

For engineers reviewing the MAX8510ETA28+T datasheet, MAX8510ETA28+T pinout, MAX8510ETA28+T application, or MAX8510ETA28+T equivalent, key selection criteria include guaranteed 2.8V ±1% accuracy over temperature, stable operation with only 1μF ceramic output capacitance, shutdown current <1μA, and compatibility with 2mm × 2mm TDFN-EP packaging for space-constrained battery-powered designs.

Technical Context

The MAX8510ETA28+T employs a P-channel MOSFET pass transistor (R_DS(ON) ≈ 1Ω) enabling low ground current (40μA typical) and minimal dropout voltage dependency on input voltage. Its bandgap reference (1.225V) feeds an error amplifier that drives the pass gate via internal feedback, ensuring tight regulation across load (100μA–120mA) and temperature (−40°C to +85°C).

Noise performance is enhanced by a dedicated BP pin accepting a 10nF capacitor to reduce RMS output noise to 11μV; PSRR remains ≥54dB up to 100kHz. Shutdown logic disables reference, error amp, and gate drive, reducing supply current to <1μA while placing OUT in high-impedance state.

Key Specifications

Pinout & Package

MAX8510ETA28+T is housed in an 8-pin TDFN-EP package (2mm × 2mm × 0.8mm) with exposed pad (EP) internally connected to GND for thermal enhancement. The EP must be soldered to a large ground plane to achieve θ_JA = 83.9°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with the Torex XC6219B282MR-G and ADP125ARHZ-2.8-R7, the MAX8510ETA28+T uniquely delivers 11μV_RMS noise with 120mA capability in a 2mm × 2mm footprint - making it the only option meeting stringent RF/analog SNR targets without increasing PCB area or quiescent power.

Availability

MAX8510ETA28+T is available at Aetrix Electronics and suitable for Bluetooth portable radios, digital cameras, personal stereos, and portable medical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX8510ETA28+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 MAX8510 series belongs to Maxim's ultra-low-noise LDO product line, engineered specifically for noise-sensitive RF, audio, and precision analog subsystems in battery-powered portable electronics.

FAQ

What is the maximum input voltage rating for the MAX8510ETA28+T?

The MAX8510ETA28+T has an absolute maximum input voltage of +7V (IN to GND), but its operational input range is specified from 2V to 6V. For reliable 2.8V output regulation, VIN must exceed VOUT by at least the dropout voltage - e.g., ≥2.93V at 120mA load. Exceeding 6V risks permanent damage even if within absolute max ratings.

Does the MAX8510ETA28+T require an external bypass capacitor on the BP pin?

Yes - the MAX8510ETA28+T requires a 10nF capacitor between BP and OUT to achieve its specified 11μV_RMS output noise. Omitting this capacitor degrades noise performance to ~230μV_RMS. The BP pin is shorted to OUT during shutdown, so the capacitor remains effective across all operating states.

Can the MAX8510ETA28+T be used with X7R ceramic capacitors for both input and output?

Yes - the MAX8510ETA28+T is explicitly characterized and guaranteed stable with 1μF X7R or X5R ceramic capacitors on both IN and OUT pins. These dielectrics maintain stable capacitance and low ESR across −40°C to +85°C, eliminating the need for larger or more expensive capacitor types.

What thermal performance can be expected from the MAX8510ETA28+T in a standard 4-layer PCB layout?

With the EP soldered to a ≥100mm² internal ground plane on a standard 4-layer board, the MAX8510ETA28+T achieves θ_JA = 83.9°C/W. At 120mA load with 3.5V input (0.7V dropout), power dissipation is 84mW - resulting in ~7°C junction-to-ambient rise above ambient, well within safe operating limits.

Is the MAX8510ETA28+T pin-compatible with other variants in the MAX8510/MAX8511/MAX8512 family?

No - the MAX8510ETA28+T uses an 8-pin TDFN-EP package, while SC70-packaged variants (e.g., MAX8510EXK28+T) use 5 pins with different pinout. Even within TDFN, MAX8511 and MAX8512 variants repurpose pin 4 (BP → N.C. or FB), making them electrically incompatible without PCB redesign.