Analog Devices Inc./Maxim Integrated MAX8512ETA+

Overview

MAX8512ETA+ from Maxim Integrated is an ultra-low-noise, adjustable-output, low-dropout (LDO) linear regulator delivering up to 120mA output current with 120mV dropout at full load and 40μA ground current. It features a P-channel MOSFET pass transistor, operates from 2V to 6V input, and supports user-defined output voltages via external feedback resistors - ideal for noise-sensitive RF and analog circuitry in portable battery-powered systems.

For engineers reviewing the MAX8512ETA+ datasheet, MAX8512ETA+ pinout, MAX8512ETA+ application, or MAX8512ETA+ equivalent, key selection criteria include its adjustable output architecture, 230μVRMS output noise (100Hz–100kHz), 72dB PSRR at 1kHz, thermal/overcurrent protection, and compatibility with 1μF ceramic capacitors for stability across temperature and load.

Technical Context

The MAX8512ETA+ uses a precision 1.225V bandgap reference and error amplifier to regulate output voltage via external R1/R2 feedback network connected to the FB pin. Its P-channel MOSFET pass transistor (typ. 1Ω R_DS(ON)) enables low dropout and eliminates base-drive current, minimizing quiescent consumption even under heavy load or in dropout.

Shutdown logic disables the reference, error amplifier, and gate driver when SHDN is pulled low, reducing supply current to <1μA. Thermal shutdown activates at +160°C with 10°C hysteresis, and current limiting holds output at 130–300mA during overload - ensuring robust operation in compact, thermally constrained layouts.

Key Specifications

Pinout & Package

MAX8512ETA+ is housed in an 8-pin TDFN-EP package (2mm × 2mm × 0.8mm) with exposed pad (EP) internally connected to GND for enhanced thermal performance. The EP must be soldered to a large PCB 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 adjustable-output LDO applications.

Compared with MAX8512ETA+, the TPS7A2025PDBVR offers superior noise but no adjustability, while the ADP125ARHZ-R7 provides higher current and broader voltage support at the cost of triple the ground current - making MAX8512ETA+ optimal for space-constrained, battery-sensitive adjustable-rail applications.

Availability

MAX8512ETA+ is available at Aetrix Electronics and suitable for portable medical devices, industrial IoT sensors, Bluetooth audio accessories, and RF front-end modules requiring stable component supply with guaranteed long-term availability.

Supply support for MAX8512ETA+ 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 high-performance analog and mixed-signal ICs for demanding applications in communications, computing, consumer, and industrial markets.

The MAX8510/MAX8511/MAX8512 family was engineered specifically for ultra-low-noise, low-quiescent-power regulation in battery-operated portable electronics - emphasizing small footprint, ceramic-capacitor compatibility, and robust protection.

FAQ

What output voltage range does the MAX8512ETA+ support?

The MAX8512ETA+ supports an adjustable output voltage range from 1.5V to 4.5V, set externally using a resistor divider connected to the FB pin. The internal 1.225V reference and equation V_OUT = 1.225V × (1 + R1/R2) allow precise configuration - for example, R1 = 12.1kΩ and R2 = 10kΩ yields 2.68V. This flexibility makes MAX8512ETA+ adaptable across diverse analog and RF subsystems without redesigning the power architecture.

How does the MAX8512ETA+ achieve ultra-low noise performance?

The MAX8512ETA+ achieves 230μV_RMS output noise (100Hz–100kHz) through a combination of low-noise bandgap design, optimized error amplifier topology, and P-channel MOSFET pass transistor architecture that eliminates base-drive current noise. Unlike bipolar-based LDOs, it avoids saturation-related noise spikes in dropout. While the MAX8510 variant adds a BP pin for 11μV_RMS noise, the MAX8512ETA+ maintains excellent noise performance inherently - sufficient for powering sensitive RF synthesizers and high-SNR audio codecs without additional filtering.

Can the MAX8512ETA+ operate with ceramic output capacitors?

Yes, the MAX8512ETA+ is fully stable with a 1μF X5R or X7R ceramic capacitor on the output - no electrolytic or tantalum capacitors required. Its internal compensation is optimized for low-ESR ceramics, and the stability region chart confirms stable operation across 0–120mA load with ESR values from 0.01Ω to 10Ω. This simplifies layout, reduces cost, and improves reliability compared to older LDOs requiring larger or higher-ESR capacitors.

What thermal protection features does the MAX8512ETA+ include?

The MAX8512ETA+ integrates thermal-overload protection that disables the pass transistor when junction temperature exceeds +160°C, then re-enables it after cooling by 10°C - creating pulsed output during sustained overload. Combined with its 83.9°C/W junction-to-ambient thermal resistance (TDFN package with proper EP grounding), this prevents permanent damage during transient overloads or poor heatsinking. The exposed pad (EP) must be soldered to a ≥100mm² copper area to realize this rating - critical for continuous 120mA operation in enclosed handheld devices.

Is the MAX8512ETA+ RoHS-compliant and lead-free?

Yes, the MAX8512ETA+ is RoHS-compliant and lead-free, as indicated by the "+" suffix in its part number per Maxim Integrated's ordering conventions. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is rated for reflow soldering at +260°C. The TDFN package uses NiPdAu terminal finish and complies with IPC/JEDEC J-STD-006 requirements - ensuring compatibility with modern lead-free assembly processes and environmental regulations worldwide.