Analog Devices Inc./Maxim Integrated MAX5096BATE+T

Overview

MAX5096BATE+T from Maxim Integrated is a dual-mode 40V, 600mA buck converter with integrated low-quiescent-current LDO mode, operating from 5V–40V (buck) or 4V–40V (LDO), delivering fixed 5V output with ±1.2% regulation at 600mA load, and featuring 135kHz switching frequency, 41μA typical quiescent current in LDO mode, and automotive-grade -40°C to +125°C operation - used in vehicle infotainment power rails requiring ultra-low standby consumption.

For engineers reviewing the MAX5096BATE+T datasheet, MAX5096BATE+T pinout, MAX5096BATE+T application, or MAX5096BATE+T equivalent, key selection criteria include dual-mode transition timing (100μs LDO→buck), LDO dropout voltage (0.37V @100mA), RESET timeout programmability, thermal shutdown at +165°C, and TQFN-16 EP package thermal performance (θJA = 30.0°C/W).

Technical Context

The MAX5096BATE+T implements a current-mode PWM buck architecture with internal 0.9Ω p-channel high-side switch and external freewheeling diode, enabling cycle-by-cycle current limiting and stable compensation across wide input ranges. Its dual-mode control logic uses the LDO/BUCK pin to dynamically select between high-efficiency switching (≥85% at 400mA) and ultra-low-I_Q linear regulation (41μA typ).

It integrates a 4V internal BP regulator for biasing, programmable soft-start (via SS capacitor), adjustable power-on-reset timeout (via CT capacitor), and open-drain RESET output with 92% V_OUT threshold hysteresis - all operating identically in both buck and LDO modes without reconfiguration.

Key Specifications

Pinout & Package

MAX5096BATE+T is housed in a thermally enhanced 16-pin TQFN-EP (4mm × 4mm, 0.5mm pitch) with exposed pad for PCB-level heat sinking. The package supports 2.6W dissipation at +70°C ambient and features 0.9Ω R_DS(ON) internal p-channel switch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-mode DC-DC regulator applications.

Compared with LM5165QPWPRQ1 and TPS62130AQDGSRQ1, the MAX5096BATE+T uniquely integrates buck + LDO + RESET + soft-start + thermal protection in one 16-pin TQFN, enabling single-chip 5V power for automotive modules requiring both high-load capability and sub-50μA standby.

Availability

MAX5096BATE+T is available at Aetrix Electronics and suitable for automotive infotainment, telematics, ADAS camera modules, and body control systems requiring stable component supply across extended temperature and harsh electrical environments.

Supply support for MAX5096BATE+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 and mixed-signal ICs for automotive, industrial, and communications markets, emphasizing high-reliability operation under extreme conditions.

The MAX5096/MAX5097 product line was engineered specifically for automotive power management where dual-mode efficiency and ultra-low quiescent current are mandatory - targeting ECU, gateway, and sensor module applications demanding ISO 16750 compliance and AEC-Q100 qualification.

FAQ

What is the guaranteed output current of MAX5096BATE+T in buck mode versus LDO mode?

The MAX5096BATE+T delivers up to 600mA in buck mode across its 5V–40V input range, limited by internal switch current limit (1.15A min) and thermal dissipation. In LDO mode, it guarantees 100mA continuous output, constrained by package power handling and dropout voltage (0.37V @100mA). Both ratings are specified over -40°C to +125°C ambient.

How does the MAX5096BATE+T achieve ultra-low quiescent current in LDO mode?

The MAX5096BATE+T achieves 41μA typical quiescent current in LDO mode by disabling its PWM oscillator, current-sense amplifier, and external compensation circuitry while retaining only essential bias currents for the error amplifier and reference. This is triggered by driving the LDO/BUCK pin high, which reconfigures the internal p-channel switch as a linear pass element.

Can the MAX5096BATE+T be synchronized to an external clock, and what is the supported frequency range?

Yes, the MAX5096BATE+T supports external synchronization via the SYNC pin. As a MAX5096 variant, it accepts external clocks from 120kHz to 500kHz. This allows EMI reduction through frequency alignment with other system clocks or spread-spectrum modulation - critical for automotive infotainment systems co-located with AM/FM receivers.

What is the function of the ADJ pin on the MAX5096BATE+T, and how is it used for fixed 5V output?

The ADJ pin on the MAX5096BATE+T serves as the feedback reference input. For fixed 5V output (MAX5096B variant), ADJ is internally configured to regulate at 1.237V and must be connected directly to SGND. This ties the internal error amplifier to the factory-trimmed 5V output setting - no external resistors are needed, simplifying layout and improving accuracy vs. adjustable configurations.

Does the MAX5096BATE+T provide protection against short circuits and thermal overload?

Yes, the MAX5096BATE+T includes cycle-by-cycle current limiting in buck mode (1.15A min switch limit), short-circuit protection in LDO mode (150–500mA sink current), and thermal shutdown at +165°C junction temperature with 20°C hysteresis. These protections operate independently in both modes and do not require external components.