Analog Devices Inc./Maxim Integrated MAX8510ETA29+T

Overview

The MAX8510ETA29+T from Maxim Integrated is a 2.85V fixed-output, ultra-low-noise, low-dropout linear regulator featuring a P-channel MOSFET pass device, 120mV dropout at 120mA, 11μVRMS output noise (100Hz–100kHz), 78dB PSRR at 1kHz, and 40μA ground current - designed for noise-sensitive RF and analog circuitry in portable battery-powered systems.

For engineers reviewing the MAX8510ETA29+T datasheet, MAX8510ETA29+T pinout, MAX8510ETA29+T application, or MAX8510ETA29+T equivalent, key selection criteria include output voltage accuracy (±1% at +25°C), stability with 1μF ceramic output capacitance, shutdown current <1μA, thermal/overcurrent protection, and compatibility with 2V–6V input range in space-constrained TDFN-EP packaging.

Technical Context

The MAX8510ETA29+T employs an internal 1.225V bandgap reference and error amplifier to regulate output against load and line variations, with feedback provided by an internal resistor divider. Its P-channel MOSFET pass transistor (typ. R_DS(ON) = 1Ω) eliminates base-drive current, enabling ultra-low quiescent current across load conditions.

Dropout behavior is governed by I_LOAD × R_DS(ON), yielding 120mV at 120mA for V_OUT ≥ 3V and 135mV for 2.5V ≤ V_OUT < 3V. The BP pin supports a 10nF bypass capacitor to suppress high-frequency noise, reducing RMS output noise to 11μV - a feature exclusive to the MAX8510 variant.

Key Specifications

Pinout & Package

MAX8510ETA29+T uses an 8-pin TDFN-EP package (2mm × 2mm × 0.8mm) with exposed pad (EP) internally connected to GND for thermal enhancement. Pin 1 is IN; Pin 2 is GND; Pin 3 is SHDN; Pin 4 is BP; Pin 5 is OUT; Pins 6–8 are N.C.; EP must be soldered to a large ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with the Torex XC6210B285MR-G and ADP125ARHZ-2.85-R7, the MAX8510ETA29+T uniquely delivers 2.85V regulation with 120mA capability, 11μV_RMS noise, and thermal performance optimized via EP - making it the only option qualified for RF-sensitive, space-constrained, and battery-life-critical designs.

Availability

MAX8510ETA29+T is available at Aetrix Electronics and suitable for cellular front-end power, Bluetooth audio SoC supply, digital camera image sensor bias, and portable medical pulse oximeter applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX8510ETA29+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 markets.

The MAX8510 series belongs to Maxim's ultra-low-noise LDO family, engineered specifically for noise-critical analog and RF subsystems in portable, battery-powered equipment where PSRR, dropout, and quiescent current are design-defining parameters.

FAQ

What is the output voltage tolerance of the MAX8510ETA29+T over temperature and load?

The MAX8510ETA29+T guarantees ±1% output voltage accuracy at +25°C and 1mA load. Over the full -40°C to +85°C operating temperature range and 100μA to 80mA load, accuracy degrades to ±2%, and under worst-case conditions (full temperature range and 100μA to 80mA), it is specified as ±3%. This ensures reliable operation in consumer and industrial portable devices without external trimming.

Does the MAX8510ETA29+T require an external bypass capacitor on the BP pin?

Yes, the MAX8510ETA29+T requires a 10nF capacitor between BP (Pin 4) and OUT (Pin 5) to achieve its specified 11μV_RMS output noise. Omitting this capacitor increases noise to 230μV_RMS. The BP pin is shorted to OUT during shutdown, so the capacitor remains effective across all operating states. Use C0G/NP0 dielectric for stability.

Can the MAX8510ETA29+T operate with input voltages below 2.85V?

No - the MAX8510ETA29+T requires a minimum input voltage of 2V, but regulation ceases when VIN falls below VOUT plus dropout voltage. At 120mA load, dropout is 135mV, so minimum functional input is 2.985V. Below that, output collapses linearly. It cannot regulate at VIN < 2.85V, and absolute minimum VIN is 2V (absolute maximum rating).

What thermal considerations apply to the MAX8510ETA29+T in its TDFN-EP package?

The MAX8510ETA29+T in the 2mm × 2mm TDFN-EP package has θ_JA = 83.9°C/W and θ_JC = 37°C/W when mounted per JEDEC JESD51-7 on a four-layer board. To maintain junction temperature below +150°C, the exposed pad (EP) must be soldered to a ≥100mm² internal or external ground plane. Without proper EP thermal connection, power dissipation capability drops significantly.

How does the MAX8510ETA29+T behave during shutdown?

When SHDN (Pin 3) is pulled low (<0.4V), the MAX8510ETA29+T disables its bandgap reference, error amplifier, gate driver, and pass transistor. Output enters high-impedance state, and total supply current drops to <1μA. The BP pin is shorted to OUT during shutdown, preserving capacitor charge. Startup delay is ~300μs from SHDN rising to 90% VOUT.