Analog Devices Inc./Maxim Integrated MAX38907ATP+T

Overview

MAX38907ATP+T from Maxim Integrated is a 4A, high-PSRR nMOS linear regulator with ±1% output accuracy over line, load, and temperature, 51mV dropout at 4A, and programmable 27-output-voltage selection via SELA/SELB/SELC pins. It operates from 0.9V–5.5V input and 2.7V–20V BIAS supply, supporting FPGA core rail regulation in compact industrial power systems.

For engineers reviewing the MAX38907ATP+T datasheet, MAX38907ATP+T pinout, MAX38907ATP+T application, or MAX38907ATP+T equivalent, this page delivers verified electrical specs, thermal performance data, margining capability (±5%), Power-OK signaling, and validated 20-pin TQFN package implementation - all critical for high-current, low-noise LDO selection in server μPs and medical instrumentation.

Technical Context

The MAX38907ATP+T uses an nMOS pass device architecture with separate IN and BIAS supplies to decouple control loop stability from input rail noise. Its error amplifier references a stable 0.6V internal bandgap and employs BYP capacitor-controlled soft-start for monotonic VOUT ramp-up.

It integrates active reverse-current protection triggered at VOUT − VIN > 6.5mV, thermal shutdown at +165°C (hysteresis to +150°C), and current limiting set to 5.6A typical. The POK pin monitors FB voltage with 88–94% VOUT threshold and open-drain output requiring external pullup.

Key Specifications

Pinout & Package

The MAX38907ATP+T is housed in a 20-pin, 5mm × 5mm TQFN package with exposed thermal pad (EP). This RoHS-compliant package provides θ_JA = 30°C/W on four-layer board and supports >3W dissipation at +70°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A8801RTJT and LT3045EMSE#PBF, the MAX38907ATP+T uniquely combines digital voltage selection, ±5% margining, BIAS-supplied control loop, and POK signaling - making it optimal for FPGA/ASIC power domains requiring configurability, testability, and robust sequencing.

Availability

MAX38907ATP+T is available at Aetrix Electronics and suitable for FPGA core rail regulation, medical imaging sensor bias, industrial PLC I/O modules, and 5G base station radio front-end designs requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for MAX38907ATP+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, sensing, and connectivity applications across industrial, medical, and communications markets.

The MAX38907/MAX38908 product line targets high-current, low-noise power delivery in space-constrained systems - specifically engineered to replace multiple fixed-LDOs with a single programmable solution while maintaining ±1% accuracy and fast transient immunity.

FAQ

What is the maximum output current supported by the MAX38907ATP+T?

The MAX38907ATP+T delivers up to 4A of continuous output current. This rating is validated across the full operating temperature range (−40°C to +125°C) and holds under worst-case conditions including 300mV input-to-output headroom and 2.7V–20V BIAS supply. Current limit is set to 5.6A typical to protect against short-circuit faults.

How does the MRG pin function on the MAX38907ATP+T?

The MRG pin on the MAX38907ATP+T enables ±5% output voltage margining: pulling MRG to GND lowers VOUT by 5%, pulling above 1.4V raises it by 5%, and floating MRG maintains nominal regulation. This feature is fully integrated and requires no external components - allowing in-system validation of timing margins without modifying the MAX38907ATP+T's SEL pin configuration.

Does the MAX38907ATP+T require an external feedback resistor network?

No, the MAX38907ATP+T does not require external feedback resistors. It implements digital output voltage selection using SELA, SELB, and SELC pins to configure one of 27 factory-trimmed output voltages (0.6V–5.0V). External resistors are only needed for the MAX38908 variant; the MAX38907ATP+T uses internal resistor ladders and trim DACs for precision setting.

What is the purpose of the OUTS pin on the MAX38907ATP+T?

The OUTS pin on the MAX38907ATP+T provides remote output voltage sensing to compensate for PCB trace resistance between the LDO and load. When connected directly to the load's power pin, it closes the feedback loop at the point-of-load, maintaining ±1% regulation accuracy despite up to 50mΩ of series resistance - essential for high-current FPGA or ASIC core rails.

Can the MAX38907ATP+T operate with a 1.0V input supply?

Yes, the MAX38907ATP+T supports input voltages as low as 0.9V. However, operation at 1.0V input requires the output voltage to be ≤0.95V (to maintain 5% headroom for regulation), and the BIAS supply must remain ≥2.7V. For example, a 0.95V output at 4A load is achievable with 1.0V IN and 5V BIAS, leveraging the nMOS architecture's low dropout.