Analog Devices Inc./Maxim Integrated MAX38902CANT+T

Overview

MAX38902CANT+T from Analog Devices is a low-noise, 500mA LDO linear regulator in a 2×3 wafer-level package (WLP), delivering 10.5µVRMS output noise (10Hz–100kHz), ±1% DC output accuracy over load/line/temperature, and only 100mV max dropout at full load with 3.6V input. It features resistor-adjustable output voltage (0.6V–5.3V), programmable soft-start, active discharge (800Ω), and overcurrent/thermal protection - deployed in high-resolution data acquisition systems where ultra-low noise and tight regulation are critical.

For engineers reviewing the MAX38902CANT+T datasheet, MAX38902CANT+T pinout, MAX38902CANT+T application, or MAX38902CANT+T equivalent, key selection criteria include its WLP footprint, FB-based voltage setting, absence of POK output (distinguishing it from MAX38902B), thermal performance on four-layer boards (θJA = 95.1°C/W), and compatibility with ≥2µF ceramic output capacitors.

Technical Context

The MAX38902CANT+T implements a pMOS pass transistor architecture with internal 0.6V reference and feedback-controlled error amplifier, enabling stable regulation across 0.6V–5.3V via external resistor divider on FB pin. Its control loop is optimized for low-noise operation using BYP capacitor filtering and includes reverse-current protection triggered when VIN falls 10mV below VOUT.

Thermal shutdown activates at +165°C (rising) and resets at +150°C (falling), while current limiting caps output at ~700mA (typ). The device draws only 365µA quiescent current independent of dropout voltage and supports fast output discharge via 800Ω internal switch when EN is low.

Key Specifications

Pinout & Package

MAX38902CANT+T uses a 2×3 wafer-level package (WLP), 0.4mm pitch, with 6 solder bumps. The exposed silicon die surface serves as the thermal path; no exposed pad is present. Land pattern follows Analog Devices Application Note 1891.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX38902BATA+, MAX38902CANT+T trades POK functionality for smaller WLP footprint and lower assembly cost; versus TPL7407LPGDR, it offers adjustable output, lower noise, and programmable soft-start - critical for precision analog systems.

Availability

MAX38902CANT+T is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, portable audio devices, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX38902CANT+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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX38902 series belongs to Analog Devices' precision low-noise LDO portfolio, designed specifically for noise-sensitive analog signal chains in portable and space-constrained applications where thermal efficiency and output accuracy are non-negotiable.

FAQ

What output voltage range does the MAX38902CANT+T support?

The MAX38902CANT+T supports an output voltage range of 0.6V to 5.3V, set externally via a resistor divider connected to the FB pin. The internal feedback reference is precisely trimmed to 0.6V, enabling accurate calculation of R3 using R3 = R2 × (VOUT/0.6V − 1). This flexibility allows MAX38902CANT+T to replace multiple fixed-output LDOs in multi-rail systems.

Does the MAX38902CANT+T include a power-good (POK) output?

No, the MAX38902CANT+T does not include a POK output. That feature is exclusive to the MAX38902B variant (e.g., MAX38902BATA+). The MAX38902CANT+T retains all other core capabilities - including 500mA output, 10.5µVRMS noise, FB-based voltage programming, and active discharge - making it ideal for designs where POK signaling is handled elsewhere or unnecessary.

What is the minimum output capacitance required for stability with the MAX38902CANT+T?

The MAX38902CANT+T requires a minimum of 2µF ceramic output capacitance (X5R or X7R dielectric) for guaranteed stability across temperature and DC bias. This value accounts for capacitance derating - for example, a 4.7µF/6.3V X5R capacitor (e.g., Murata GRM155R60J475ME47) maintains ~2.9µF at 1.8V bias, satisfying the requirement. Lower values risk oscillation or poor transient response.

How does the active discharge function work on the MAX38902CANT+T?

When the EN pin is pulled low, the MAX38902CANT+T activates an internal 800Ω resistor between the OUT pin and GND, rapidly discharging external output capacitors. This feature ensures predictable, controlled power-down behavior - critical for systems requiring strict power sequencing, such as FPGAs or processors with multiple supply domains. Discharge time depends on COUT value (e.g., ~16ms for 4.7µF).

Can the MAX38902CANT+T be used with input voltages below 1.7V?

No - the absolute minimum input voltage for the MAX38902CANT+T is 1.7V, as specified in both Absolute Maximum Ratings and Electrical Characteristics. Operation below this threshold risks failure to regulate, increased dropout, or undefined behavior. For sub-1.7V inputs, consider alternative regulators like the MAX1725 or ADP125, which support down to 1.2V or 1.0V respectively.