Analog Devices Inc./Maxim Integrated MAX8510EXK21+T

Overview

MAX8510EXK21+T from Maxim Integrated is an ultra-low-noise, low-dropout linear regulator delivering 120mA output with 120mV dropout at full load, 11μVRMS output noise (100Hz–100kHz), 78dB PSRR at 1kHz, and preset 2.1V output voltage in a 5-pin SC70 package. It serves as a precision power supply for RF front-ends and analog signal chains in portable wireless devices.

For engineers reviewing the MAX8510EXK21+T datasheet, MAX8510EXK21+T pinout, MAX8510EXK21+T application, or MAX8510EXK21+T equivalent, key selection criteria include ultra-low noise performance, SC70 footprint compatibility, 2.1V fixed output accuracy over temperature, and shutdown current <1μA - critical for battery-powered RF subsystems requiring clean bias rails.

Technical Context

The MAX8510EXK21+T uses a P-channel MOSFET pass transistor with 1Ω typical R_DS(ON), enabling low dropout and eliminating base-drive current loss. Its bandgap reference (1.225V) feeds an error amplifier that controls the pass gate via internal feedback, achieving ±1% output accuracy at 1mA and ±3% across 100μA–80mA load range.

Noise reduction relies on a dedicated BP pin accepting a 10nF capacitor to OUT, bypassing the internal reference and reducing RMS noise to 11μV. Shutdown logic disables the reference, error amp, and gate driver, dropping quiescent current below 1μA while placing OUT in high-impedance state.

Key Specifications

Pinout & Package

MAX8510EXK21+T is housed in a RoHS-compliant 5-pin SC70 package (2.0mm × 1.25mm × 0.95mm height), with exposed pad omitted - thermal performance relies on GND pin conduction. The SC70 footprint supports high-density PCB layouts in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B212MR-G and ADP125ARZ-2.1-R7, the MAX8510EXK21+T uniquely delivers 11μV_RMS noise in SC70 size - making it the only viable choice for RF and high-fidelity audio biasing where noise floor directly limits system performance.

Availability

MAX8510EXK21+T is available at Aetrix Electronics and suitable for cellular front-end power, Bluetooth audio DAC bias, digital camera image sensor bias, and wearable health sensor analog front-end applications requiring stable component supply with guaranteed long-term availability.

Supply support for MAX8510EXK21+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, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.

The MAX8510 series belongs to Maxim's ultra-low-noise LDO family, engineered specifically for RF and high-performance analog subsystems where power supply noise directly degrades signal integrity and system-level metrics like EVM or SNR.

FAQ

What is the output voltage tolerance of the MAX8510EXK21+T over temperature and load?

The MAX8510EXK21+T guarantees ±2% output voltage accuracy over load (100μA to 80mA) and temperature (-40°C to +85°C), and ±1% at 25°C with 1mA load. This tight tolerance ensures reliable operation of 2.1V-dependent circuits such as RF power amplifiers and precision ADC references without external trimming.

Can the MAX8510EXK21+T operate with ceramic capacitors only?

Yes, the MAX8510EXK21+T is fully stable with 1μF X7R/X5R ceramic capacitors on both input and output. No electrolytic or tantalum capacitors are required. The BP pin further enables noise optimization using a 10nF ceramic capacitor between BP and OUT - simplifying layout and reducing bill-of-materials cost.

How does the BP pin function in the MAX8510EXK21+T?

The BP pin in the MAX8510EXK21+T connects to an internal noise-bypass node tied to the bandgap reference. Adding a 10nF capacitor from BP to OUT shunts high-frequency reference noise, reducing total output noise to 11μV_RMS. During shutdown, BP is internally shorted to OUT to prevent leakage, ensuring fast, clean turn-off without external discharge paths.

What thermal considerations apply to the MAX8510EXK21+T in SC70 package?

The MAX8510EXK21+T in SC70 has θ_JA = 324°C/W. At 120mA load with 2.22V input (120mV dropout), power dissipation is ~14.4mW - resulting in ~4.7°C junction rise above ambient. For continuous high-load operation, ensure adequate copper area on GND net and avoid enclosing the device in thermally isolated zones.

Is the MAX8510EXK21+T RoHS-compliant and lead-free?

Yes, the "+T" suffix in MAX8510EXK21+T denotes a lead(Pb)-free and RoHS-compliant package. The SC70 package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering at up to 260°C peak temperature, supporting standard Pb-free assembly processes.