Analog Devices Inc./Maxim Integrated MAX8902BATA+T

Overview

MAX8902BATA+T from Maxim Integrated is an adjustable-output, low-noise 500mA LDO regulator in a 2mm × 2mm TDFN-EP package. It delivers ±1.5% output accuracy over load, line, and temperature; maintains 16µVRMS output noise (10Hz–100kHz); achieves 100mV max dropout at 500mA; supports 0.6V–5.3V output via external resistor divider; and features power-OK (POK) output and thermal/reverse-current protection. It is used in smartphones and portable media players requiring clean, stable bias for RF and analog circuitry.

For engineers reviewing the MAX8902BATA+T datasheet, MAX8902BATA+T pinout, MAX8902BATA+T application, or MAX8902BATA+T equivalent, this page provides verified technical context, validated pin functions, confirmed design values for noise, PSRR, dropout, and POK behavior, and real-world selection guidance against comparable adjustable LDOs - all specific to the MAX8902B variant with ABH top mark and automotive-grade -40°C to +125°C operation.

Technical Context

The MAX8902B employs a pMOS pass transistor architecture enabling ultra-low dropout (100mV at 500mA) and reverse-current blocking when IN falls below OUT by >10mV. Its feedback loop uses a precision 0.6V reference at the FB pin, with guaranteed ±0.009V threshold accuracy and <0.03µA input bias current across temperature.

It integrates a dedicated open-drain POK output that asserts low when VOUT reaches ≥91% of regulation, with 10mV typical hysteresis and <100mV low-level voltage at 1mA sink. Startup slew rate is programmable via the BYP capacitor (0.001µF–0.1µF), directly scaling inverse-linearly with capacitance per the formula (5V/ms) × (0.01µF/C_BYP).

Key Specifications

Pinout & Package

MAX8902BATA+T is housed in an 8-pin, 2mm × 2mm × 0.8mm TDFN-EP package with exposed paddle (EP) for thermal dissipation. The EP must be soldered to a PCB ground plane with ≥4 thermal vias for θ_JA = 83.9°C/W compliance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable-output LDO applications.

Compared with the MAX8902BATA+T, the XC6210B332MR-G and ADP1740ACPZ-1.8-R7 lack both output adjustability and power-OK signaling - key requirements for flexible, sequenced, and battery-sensitive designs - making the MAX8902BATA+T the sole option supporting full-feature LDO implementation in compact portable platforms.

Availability

MAX8902BATA+T is available at Aetrix Electronics and suitable for smartphones, wireless headphones, and GPS navigation devices requiring stable component supply, automotive-grade (-40°C to +125°C) operation, and long-term lifecycle continuity.

Supply support for MAX8902BATA+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 high-performance analog and mixed-signal ICs for power management, interface, sensing, and RF applications.

The MAX8902 family targets portable and automotive electronics requiring ultra-low-noise, high-accuracy LDOs with integrated protection and sequencing features - specifically optimized for noise-sensitive RF, audio, and timing subsystems.

FAQ

What is the maximum output current supported by the MAX8902BATA+T?

The MAX8902BATA+T guarantees 500mA of continuous output current across its full operating temperature range (-40°C to +125°C). It also includes 700mA short-circuit current limiting and thermal shutdown at 165°C to protect against overload conditions. This rating applies under specified input voltage, dropout, and PCB thermal layout conditions per the datasheet's thermal characteristics table.

Does the MAX8902BATA+T include a power-good (POK) output?

Yes, the MAX8902BATA+T includes a dedicated open-drain POK output (Pin 5). It pulls low when the regulated output reaches ≥91% of its target voltage and goes high-impedance during startup, shutdown, or output fault. The POK threshold has ±3% tolerance and 10mV typical hysteresis, enabling reliable power sequencing in SoC-based systems.

How is the output voltage set on the MAX8902BATA+T?

The MAX8902BATA+T uses an external resistor divider connected to the FB pin (Pin 6) to set the output voltage from 0.6V to 5.3V. The internal reference is precisely 0.600V ±9mV, so VOUT = 0.6V × (1 + R1/R2). To minimize error from FB input bias current, R2 must be ≤120kΩ, and both resistors should be 1% tolerance metal-film types.

What is the purpose of the BYP pin on the MAX8902BATA+T?

The BYP pin (Pin 7) on the MAX8902BATA+T serves two critical functions: it filters reference and feedback noise to achieve 16µVRMS output noise, and it controls startup slew rate via an external capacitor (0.001µF–0.1µF) connected to OUT. A 0.01µF BYP capacitor yields a 5V/ms slew rate, limiting inrush current during power-on while maintaining low-frequency stability.

Is the MAX8902BATA+T suitable for automotive applications?

Yes, the MAX8902BATA+T is qualified for automotive use with guaranteed operation from -40°C to +125°C ambient temperature and junction temperatures up to +150°C. Its datasheet specifies automotive-grade absolute maximum ratings, thermal shutdown hysteresis, and AEC-Q200-aligned reliability testing - making it appropriate for infotainment, telematics, and ADAS subsystems requiring robust LDO performance.