Analog Devices Inc./Maxim Integrated MAX15037ATE/V+

Overview

MAX15037ATE/V+ from Maxim Integrated is a synchronous buck DC-DC converter IC with integrated 150mΩ high-side n-channel MOSFET, supporting 4.5V–5.5V or 5.5V–23V input, 0.6V adjustable output, up to 3A load current, and resistor-programmable switching frequency from 200kHz to 2.2MHz. It delivers high-efficiency point-of-load regulation in automotive radio power supplies and IP phone systems.

For engineers reviewing the MAX15037ATE/V+ datasheet, MAX15037ATE/V+ pinout, MAX15037ATE/V+ application, or MAX15037ATE/V+ equivalent, this page provides verified functional identity, thermal-enhanced TQFN-16 package mapping, synchronous rectifier driver timing behavior, power-good assertion threshold (92.5% V_OUT nominal), and confirmed alternative options for synchronous buck designs requiring >90% efficiency at 1.5A/3.3V from 12V input.

Technical Context

The MAX15037ATE/V+ implements voltage-mode PWM control with peak current limiting and adaptive break-before-make (25ns t_BBM) to prevent shoot-through between its internal high-side MOSFET and external low-side synchronous FET driven by the DL pin. Its internal 5.2V VL regulator powers control circuitry and supplies bootstrap charging during off-time.

It supports external synchronization (200kHz–2.2MHz) with fixed 65° phase delay from SYNC rising edge to SOURCE turn-on, and features digital soft-start (4096 oscillator cycles, 64-step ramp) plus thermal shutdown at +170°C with 25°C hysteresis - all operating across –40°C to +125°C ambient.

Key Specifications

Pinout & Package

MAX15037ATE/V+ uses a thermally enhanced 16-pin TQFN package (5mm × 5mm) with exposed pad (EP) soldered to SGND for optimal heat dissipation and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with MP2315DJ-LF-Z and TPS54332DR, MAX15037ATE/V+ uniquely combines PGOOD, SYNC, DL-driven synchronous rectification, and adaptive BBM in a thermally optimized 16-pin TQFN - making it the only option among the three qualified for automotive-grade sequencing and high-efficiency PoL in thermally constrained environments.

Availability

MAX15037ATE/V+ is available at Aetrix Electronics and suitable for automotive radio power supplies, IP phone DC-DC conversion, and server point-of-load regulation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX15037ATE/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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX15037ATE/V+ belongs to Maxim's high-frequency synchronous buck converter product line, engineered specifically for compact, high-efficiency point-of-load regulation in thermally constrained systems operating across –40°C to +125°C.

FAQ

What is the maximum supported switching frequency for MAX15037ATE/V+?

The MAX15037ATE/V+ supports a maximum switching frequency of 2.2MHz, programmable via an external resistor on the OSC pin. At ROSC = 5.62kΩ, the typical f_SW is 2.1MHz. Operation at 2.2MHz enables minimal inductor size and reduced output capacitance, though thermal performance must be validated at full 3A load under worst-case ambient conditions. The MAX15037ATE/V+ maintains stable voltage-mode control and peak current limiting up to this frequency.

Does MAX15037ATE/V+ include an internal power MOSFET?

Yes, the MAX15037ATE/V+ integrates a 150mΩ (typ) high-side n-channel power MOSFET rated for up to 5.6A peak current. This eliminates the need for an external high-side switch in buck topologies. However, it requires an external low-side synchronous MOSFET driven by the DL pin - the internal device does not include a low-side FET. The integrated MOSFET is electrically and thermally optimized for use with the MAX15037ATE/V+'s gate driver and thermal pad.

What is the function of the DL pin on MAX15037ATE/V+?

The DL pin on MAX15037ATE/V+ is the synchronous rectifier driver output. It sources up to 0.75A and sinks up to 1A to rapidly switch an external low-side n-channel MOSFET in buck configurations. It incorporates adaptive break-before-make timing (25ns) to prevent shoot-through with the internal high-side FET. Unlike the MAX15036ATE/V+, the MAX15037ATE/V+ uses DL instead of a clock output (CKO) or RESET, reflecting its dedicated synchronous buck role.

How does the PGOOD output behave on MAX15037ATE/V+?

The PGOOD output on MAX15037ATE/V+ is an open-drain signal that goes high only when the regulated output voltage reaches and sustains ≥92.5% of its nominal setpoint (e.g., ≥3.07V for a 3.3V rail). Propagation delay from FB crossing threshold to PGOOD assertion is ≤3μs. It remains high until V_OUT drops below this threshold, providing precise power sequencing for downstream logic. An external pull-up resistor to VL or V_OUT is required for proper logic-level operation.

Can MAX15037ATE/V+ operate from a 5V input supply?

Yes, MAX15037ATE/V+ supports 4.5V–5.5V input operation by connecting V+ directly to VL (pin 7 to pin 8), bypassing the internal VL regulator's dropout mode. In this configuration, VL follows V+, so a stable 5V input yields ~5V VL - sufficient to power internal circuitry and bootstrap charging. The device maintains full functionality including PGOOD, DL drive, and 3A output capability. Layout must ensure low-impedance connection between V+ and VL and proper bypassing per datasheet recommendations.