Analog Devices Inc./Maxim Integrated MAX8510ETA45+T

Overview

The MAX8510ETA45+T from Maxim Integrated is a 4.5V fixed-output, ultra-low-noise, low-dropout linear regulator featuring a P-channel MOSFET pass element, 120mV dropout at 120mA, 11µV_RMS output noise (100Hz–100kHz), and 78dB PSRR at 1kHz. It delivers up to 120mA continuous output current with only 40µA ground current and operates from 2V to 6V input, targeting noise-sensitive analog rails in portable RF and audio subsystems.

For engineers reviewing the MAX8510ETA45+T datasheet, MAX8510ETA45+T pinout, MAX8510ETA45+T application, or MAX8510ETA45+T equivalent, key selection criteria include its 4.5V fixed output, TDFN-8 (2mm × 2mm) package, BP-capacitor–enabled ultra-low-noise performance, shutdown current <1µA, and guaranteed stability with 1µF ceramic output capacitance.

Technical Context

The MAX8510ETA45+T implements a bandgap-referenced error amplifier driving a 1Ω (typ) P-channel MOSFET pass transistor, enabling low dropout and minimal quiescent current across load and temperature. Its BP pin accepts a 10nF capacitor to shunt high-frequency noise from the internal reference, directly enabling the 11µV_RMS noise spec.

Shutdown is controlled via a CMOS-compatible SHDN pin (logic low disables regulation, dropping supply current to <1µA); the device enters high-impedance output state with thermal shutdown (160°C trip, 10°C hysteresis) and current limiting (130–300mA range) active during fault conditions.

Key Specifications

Pinout & Package

Package: 8-pin TDFN-EP (2mm × 2mm × 0.8mm) with exposed pad (EP) internally connected to GND; requires soldering EP to large ground plane for thermal performance (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 XC6219B452MR-G and ADP125ARHZ-4.5-R7, the MAX8510ETA45+T uniquely delivers 11µV_RMS noise via its BP pin architecture and fits in the smallest footprint (2mm × 2mm), making it the only option qualified for noise-critical RF and precision analog subsystems in ultra-compact portable designs.

Availability

The MAX8510ETA45+T is available at Aetrix Electronics and suitable for cellular front-end power, portable audio codec supply, digital camera image sensor bias, and industrial handheld scanner logic rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX8510ETA45+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 family, designed specifically for powering noise-sensitive analog and RF circuitry in battery-operated portable equipment where small size, low quiescent current, and exceptional PSRR are mandatory.

FAQ

What is the maximum input voltage rating for the MAX8510ETA45+T?

The MAX8510ETA45+T has an absolute maximum input voltage of +7V referenced to GND. However, its specified operating input range is 2V to 6V. Exceeding 6V may cause excessive power dissipation or violate thermal limits, especially at high output current. Always maintain VIN ≤ 6V in normal operation to ensure reliability and compliance with electrical characteristics.

Does the MAX8510ETA45+T require an external bypass capacitor on the BP pin?

Yes, the MAX8510ETA45+T requires a 10nF capacitor between BP and OUT to achieve its specified 11µV_RMS output noise. Without this capacitor, noise increases to 230µV_RMS. The BP pin is shorted to OUT during shutdown, so the capacitor remains safely biased. Use C0G/NP0 dielectric for stability across temperature.

Can the MAX8510ETA45+T be used with ceramic output capacitors smaller than 1µF?

No - the MAX8510ETA45+T is guaranteed stable only with ≥1µF ceramic output capacitance (X7R or X5R dielectric). Using smaller values risks oscillation or degraded transient response. The 1µF minimum applies across full load (0–120mA) and temperature (-40°C to +85°C); lower-ESR ceramics improve PSRR but do not relax the 1µF requirement.

What is the thermal performance difference between the SC70 and TDFN packages for the MAX8510ETA45+T?

The MAX8510ETA45+T uses the TDFN-8 package (θ_JA = 83.9°C/W), which provides significantly better thermal performance than the SC70-5 variant (θ_JA = 324°C/W). With identical power dissipation, the TDFN version runs ~240°C cooler in still air - enabling reliable 120mA operation at +85°C ambient, whereas the SC70 would exceed junction limits under the same conditions.

Is the MAX8510ETA45+T pin-compatible with other members of the MAX8510/MAX8511/MAX8512 family?

No - the MAX8510ETA45+T (TDFN-8) is not pin-compatible with SC70-5 variants (e.g., MAX8510EXK45+T) due to differing pin count and layout. Within the TDFN package group, MAX8510, MAX8511, and MAX8512 share identical pinouts, but functional differences exist: MAX8510 uses BP, MAX8511 replaces BP with N.C., and MAX8512 replaces BP with FB. Swapping requires schematic and layout changes.