Analog Devices Inc./Maxim Integrated MAX15036ATE/V+T

Overview

MAX15036ATE/V+T from Maxim Integrated is a high-frequency, nonsynchronous buck or boost DC-DC converter with an integrated 150mΩ n-channel power MOSFET, delivering up to 3A output current, supporting 4.5V–5.5V or 5.5V–23V input ranges, and offering resistor-programmable switching frequency from 200kHz to 2.2MHz. It is used in xDSL modem and automotive radio power supplies where compact, thermally robust point-of-load regulation is required.

For engineers reviewing the MAX15036ATE/V+T datasheet, MAX15036ATE/V+T pinout, MAX15036ATE/V+T application, or MAX15036ATE/V+T equivalent, key selection considerations include its 16-pin TQFN package with exposed pad, clock output for interleaved two-phase operation, power-on-reset (RESET) functionality, and peak current-limit protection enabling reliable operation in space-constrained industrial and automotive power designs.

Technical Context

The MAX15036ATE/V+T implements voltage-mode PWM control with a peak current-limit protection scheme, enabling stable operation up to 2.2MHz switching frequency. Its internal transconductance error amplifier (g_M = 1.2–2.75 mS) drives COMP to regulate output via FB with 0.600V ±9mV reference accuracy.

It integrates a 5.2V VL regulator (±0.2V over load/temperature), supports external synchronization (200kHz–2.2MHz), and features digital soft-start (4096 oscillator cycles, 64 steps). The device operates across –40°C to +125°C and dissipates up to 2.7W in its thermally enhanced 5mm × 5mm TQFN package.

Key Specifications

Pinout & Package

MAX15036ATE/V+T is housed in a thermally enhanced 16-pin thin QFN (TQFN-EP) package measuring 5mm × 5mm with an exposed pad soldered to SGND for optimal heat transfer. Pin functions are validated per Maxim's official datasheet revision 0 (July 2008).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nonsynchronous buck/boost converter applications.

Compared with LM5118MH/NOPB and TPS54331DR, the MAX15036ATE/V+T uniquely combines nonsynchronous buck/boost topology support, integrated 150mΩ MOSFET, CKO for interleaving, and RESET output - making it optimal for compact, multi-rail telecom and automotive power where layout area and sequencing control are critical.

Availability

MAX15036ATE/V+T is available at Aetrix Electronics and suitable for xDSL modem power supplies, automotive radio power supplies, and IP phone/WLAN access point designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX15036ATE/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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX15036ATE/V+T belongs to Maxim's high-frequency DC-DC converter product line, designed specifically for compact, thermally demanding point-of-load applications requiring flexible topology (buck or boost), integrated power switching, and precise power sequencing.

FAQ

What topology configurations does the MAX15036ATE/V+T support?

The MAX15036ATE/V+T supports both nonsynchronous buck and boost topologies. In buck mode, its internal 150mΩ n-channel MOSFET acts as a high-side switch; in boost mode (MAX15036 only), it serves as a low-side switch. It does not support synchronous buck operation - that function is reserved for the MAX15037 variant. The MAX15036ATE/V+T requires an external Schottky diode for rectification in both configurations.

Does the MAX15036ATE/V+T require an external resistor to set switching frequency?

Yes, the MAX15036ATE/V+T requires an external resistor (ROSC) connected from the OSC pin to SGND to set the switching frequency between 200kHz and 2.2MHz. This resistor remains mandatory even when using external synchronization via the SYNC pin - the internal oscillator must be enabled and tuned within ±20% of the SYNC frequency (0.8×f_SYNC ≤ f_SW ≤ 1.2×f_SYNC) for reliable locking.

What is the function of the CKO pin on the MAX15036ATE/V+T?

The CKO (Clock Output) pin on the MAX15036ATE/V+T provides a logic-level signal at the same frequency as the internal switching frequency, phase-shifted by 115° relative to the SOURCE waveform. It is used to synchronize a second MAX15036ATE/V+T in master/slave configuration for true 180° interleaved operation, reducing input/output ripple current and improving thermal distribution across both converters.

How does the RESET output on the MAX15036ATE/V+T behave during startup?

The RESET output on the MAX15036ATE/V+T is an open-drain, active-low signal that remains low until the regulated output voltage exceeds 92.5% of its nominal setpoint (e.g., 3.06V for a 3.3V rail), then stays low for a fixed 200ms timeout period before transitioning high. This ensures downstream logic receives a clean, delayed power-good signal synchronized to actual output stability - a behavior confirmed in the MAX15036ATE/V+T's Electrical Characteristics table and Typical Operating Characteristics (Figure toc17).

What thermal performance can be expected from the MAX15036ATE/V+T in its 5mm × 5mm TQFN package?

The MAX15036ATE/V+T achieves a junction-to-case thermal resistance (θ_JC) of 1.7°C/W and junction-to-ambient (θ_JA) of 30°C/W when mounted on a standard four-layer PCB with the exposed pad fully soldered to SGND. Its continuous power dissipation rating is 2666mW at +70°C ambient, derating by 33mW/°C above that temperature - enabling reliable 3A operation in automotive and industrial environments up to +125°C ambient when proper PCB copper area and airflow are provided.