Analog Devices Inc./Maxim Integrated MAX5087BATE/V+T

Overview

The MAX5087BATE/V+T from Maxim Integrated is a high-voltage linear regulator delivering a fixed 5.0V output at up to 400mA, operating from 6.5V to 45V input, consuming only 70μA quiescent current, and featuring integrated μP reset with programmable timeout via external capacitor on CT pin - used in automotive power rails and industrial sensor front-ends.

For engineers reviewing the MAX5087BATE/V+T datasheet, MAX5087BATE/V+T pinout, MAX5087BATE/V+T application, or MAX5087BATE/V+T equivalent, key selection criteria include guaranteed 400mA load capability at 5V, -40°C to +125°C automotive temperature range, thermal shutdown at 175°C, remote sense (OUTSENSE) support, and adjustable reset delay via CT pin capacitance.

Technical Context

This device implements a BiCMOS-based linear regulation architecture with internal 1.235V reference and error amplifier driving a high-side pass transistor. It integrates dual-mode feedback control: fixed-output mode (SET grounded) or adjustable mode (resistive divider from OUTSENSE to SET), enabling precise 5.0V regulation with ±2.6% tolerance over full temperature and load range.

The supervisor circuit shares the same reference voltage and monitors VOUT continuously, asserting open-drain RESET when output falls below 92% of nominal (4.6V for 5V version); timeout is set by CT pin's 2μA charging current into an external capacitor, yielding t_RP = C_CT × 0.6175 × 10⁶ seconds.

Key Specifications

Pinout & Package

MAX5087BATE/V+T is housed in a 16-pin thermally enhanced TQFN package (T1655+3 outline) with exposed paddle (EP) for PCB-level heat sinking. The package delivers 2.6W power dissipation at +70°C ambient and features θ_JA = 30.0°C/W and θ_JC = 2°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage linear regulator applications.

Compared with LM2940S-5.0/NOPB and TPS7B8750QKVURQ1, the MAX5087BATE/V+T uniquely combines ultra-low 70μA quiescent current, 45V input rating, adjustable reset timeout via CT, and compact 16-pin TQFN - making it optimal for space-constrained, battery-sensitive automotive and industrial designs requiring precise brown-out response.

Availability

MAX5087BATE/V+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power rails, and home security sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX5087BATE/V+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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX5087 series targets high-reliability power regulation in harsh environments - engineered specifically for automotive and industrial systems needing wide-input, low-quiescent, and integrated supervision in compact packages.

FAQ

What is the guaranteed output voltage tolerance for MAX5087BATE/V+T across temperature and load?

The MAX5087BATE/V+T guarantees 5.0V output within ±2.6% (4.87V to 5.13V) for 6.5V ≤ VIN ≤ 25V and 5mA ≤ IOUT ≤ 400mA, and within ±3.0% (4.85V to 5.15V) for 6.5V ≤ VIN ≤ 45V and 5mA ≤ IOUT ≤ 100mA, over the full -40°C to +125°C operating range. This specification is verified per Maxim's production test flow and documented in the Electrical Characteristics table of the MAX5087BATE/V+T datasheet.

Can MAX5087BATE/V+T be used in adjustable-output configurations?

Yes, the MAX5087BATE/V+T supports adjustable output from 2.5V to 11V by connecting an external resistive divider between OUTSENSE, SET, and GND - using the formula VOUT = 1.235V × (1 + R1/R2). However, its factory-trimmed internal feedback network is optimized for 5.0V fixed operation; for production-adjustable designs, confirm stability with ≥15μF output capacitance and ESR < 0.25Ω as specified in the MAX5087BATE/V+T datasheet.

What is the maximum allowable input voltage for continuous operation of MAX5087BATE/V+T?

The MAX5087BATE/V+T supports continuous operation with input voltages from 6.5V to 45V. Absolute maximum rating for IN-to-GND is +50V for ≤300ms pulses, but sustained operation must remain within 45V to ensure reliability and stay within SOA limits. Exceeding 45V risks violating the guaranteed electrical characteristics and may trigger thermal shutdown or reduce lifetime under high ambient temperatures.

How does the RESET output behave during startup and brown-out events for MAX5087BATE/V+T?

The MAX5087BATE/V+T RESET output remains high until VOUT reaches 92% of nominal (4.6V), then stays high for a user-programmed timeout (via CT capacitor) after VOUT crosses the threshold upward. During brown-out, RESET asserts low when VOUT drops below 4.6V and remains low for at least the programmed timeout after VOUT recovers - ensuring clean processor reset. Minimum timeout is 15µs (CT open), typical values range from milliseconds to seconds depending on capacitor value.

Is the exposed paddle (EP) on MAX5087BATE/V+T electrically connected internally?

No, the exposed paddle (EP) on the MAX5087BATE/V+T is not electrically connected to any internal node - it is a thermal pad only. Maxim specifies that EP must be soldered to a large PCB ground plane for optimal heat dissipation, but it must not be used as a functional ground connection. Incorrect routing of EP to signal nets or power planes can compromise thermal performance and cause reliability issues, as confirmed in the MAX5087BATE/V+T Package Information section.