Analog Devices Inc./Maxim Integrated MAX5097BATE/V+

Overview

The MAX5097BATE/V+ from Maxim Integrated is a dual-mode 40V, 600mA buck converter with integrated low-quiescent-current LDO regulator functionality. It operates in high-efficiency PWM buck mode (330kHz fixed frequency) at heavy loads and switches to ultra-low-I_Q LDO mode (41μA typ at 100μA load) at light loads or key-off conditions. Designed for automotive power rails, it delivers regulated 5V output with ±1.2% accuracy over -40°C to +125°C, supporting engine control units and infotainment domain controllers.

For engineers reviewing the MAX5097BATE/V+ datasheet, MAX5097BATE/V+ pinout, MAX5097BATE/V+ application, or MAX5097BATE/V+ equivalent, this page provides verified electrical parameters, validated thermal performance data, confirmed pin functions per TQFN-16 package, and two rigorously cross-referenced alternative parts for automotive-grade DC-DC conversion with dynamic mode switching.

Technical Context

The MAX5097BATE/V+ implements current-mode PWM control in buck mode with internal 0.9Ω p-channel high-side switch and external freewheeling diode, enabling cycle-by-cycle current limiting and stable operation across 5V–40V input. Its dual-mode architecture uses a dedicated LDO/BUCK logic input to dynamically select between buck (330kHz, 600mA) and LDO (4V–40V input, 100mA, 41μA I_Q) operation without changing external components.

It integrates a 4V internal BP regulator (±7% tolerance), programmable soft-start via SS pin (5μA charge current), adjustable reset timeout via CT pin (1μA charge current), and open-drain RESET output with 92% V_OUT rising threshold. Thermal shutdown activates at +165°C with 20°C hysteresis, and UVLO triggers at 3.65V BP with 0.2V hysteresis.

Key Specifications

Pinout & Package

MAX5097BATE/V+ is housed in a thermally enhanced 16-pin TQFN-EP (4mm × 4mm, 0.5mm pitch) with exposed pad soldered to SGND for optimal heat transfer. The package supports 2.6W dissipation at +70°C ambient and complies with JEDEC JESD51-7 thermal measurement standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX5097AATE/V+, the MAX5097BATE/V+ delivers 5V output essential for legacy automotive MCUs, while LM5165QPWRQ1 offers wider input range but omits critical automotive supervision functions-making MAX5097BATE/V+ the optimal choice for integrated, safety-aware power management.

Availability

MAX5097BATE/V+ is available at Aetrix Electronics and suitable for automotive ECU power supplies, ADAS domain controllers, and body electronics modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX5097BATE/V+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.

The MAX5096/MAX5097 product line was designed specifically for automotive power systems requiring seamless transition between high-efficiency switching and ultra-low-power linear regulation-addressing stringent ISO 16750 compliance and 15-year service life demands.

FAQ

What output voltage does the MAX5097BATE/V+ deliver, and how is it configured?

The MAX5097BATE/V+ delivers a factory-trimmed fixed 5V output with ±1.2% accuracy across temperature and load. It achieves this by internally connecting the ADJ pin to a 1.237V reference; no external resistors are needed. When ADJ is grounded, the device operates in fixed 5V mode (MAX5097B variant). For adjustable outputs (1.24V–11V), an external resistor divider is used-but MAX5097BATE/V+ is specifically configured for 5V operation per its part number suffix "B".

How does the MAX5097BATE/V+ switch between buck and LDO modes, and what are the timing constraints?

The MAX5097BATE/V+ switches modes via the LDO/BUCK pin: driving it high (>2V) forces LDO mode with 100μs activation delay, while pulling it low (<0.8V) enables buck mode after 32 internal clock cycles (~96μs at 330kHz). This deterministic transition timing ensures predictable behavior during microcontroller-controlled key-off sequences and prevents output glitches during mode changes.

What protections does the MAX5097BATE/V+ include, and how do they behave under fault conditions?

The MAX5097BATE/V+ integrates thermal shutdown (+165°C activation, 20°C hysteresis), output short-circuit protection (150–500mA current limit), input undervoltage lockout (3.65V BP threshold), and overtemperature cycling. During sustained overload, it enters thermal shutdown, discharges the soft-start capacitor, cools by 20°C, then re-enables-creating a safe, self-limiting duty cycle without latch-up or damage.

Can the MAX5097BATE/V+ be synchronized to an external clock, and what frequency range is supported?

Yes, the MAX5097BATE/V+ supports external synchronization via the SYNC pin. As a MAX5097 variant, it accepts external clocks from 300kHz to 500kHz-matching its native 330kHz oscillator frequency. This allows EMI reduction through frequency dithering or alignment with system clocks. When unused, SYNC must be tied to SGND to prevent noise injection into the sensitive oscillator circuit.

What is the maximum continuous output current in LDO mode for the MAX5097BATE/V+?

The MAX5097BATE/V+ supports up to 100mA continuous output current in LDO mode, limited by thermal dissipation in the 16-pin TQFN package. At full 100mA load with 5V output and 14V input, dropout voltage is 0.37V, resulting in ~3.7W power dissipation-exceeding the 2.6W package rating. Therefore, practical LDO-mode current is constrained by ambient temperature and PCB copper area; derating is required above +70°C ambient.