Analog Devices Inc./Maxim Integrated MAX14750AEWA+T

Overview

MAX14750AEWA+T from Analog Devices is a highly integrated, micro-IQ power-management IC for space-constrained rechargeable battery systems. It integrates a 250mW buck-boost regulator (2.5V–5V output), a 200mA synchronous buck regulator (1.0V–2.0V output), a 100mA LDO (0.9V–4.0V programmable), and a 200mA load switch with battery impedance monitoring - all in a 25-bump WLP (2.26mm × 2.14mm). It serves as a companion PMIC in wearable medical and fitness devices requiring flexible sequencing and ultra-low quiescent current.

For engineers reviewing the MAX14750AEWA+T datasheet, MAX14750AEWA+T pinout, MAX14750AEWA+T application, or MAX14750AEWA+T equivalent, this page delivers verified technical context, real-world sequencing behavior, confirmed I²C register control interface, and validated alternative options for battery-powered system design.

Technical Context

The MAX14750AEWA+T implements direct pin-enable control for each regulator and switch - unlike the sequencer-based MAX14720 - enabling custom power-up/down timing via external logic or host MCU GPIOs. Its buck-boost and buck regulators operate in burst mode below ~100µA load to maintain sub-2.6µA total quiescent current at light loads.

It features an I²C interface (400kHz compliant) for dynamic voltage configuration, UVLO selection, soft-start control, and monitor multiplexer routing. The integrated battery impedance measurement circuit requires SWIN tied to VCC and relies on controlled opening of the 250mΩ (max) load switch to sample open-circuit and loaded VSWOUT voltages.

Key Specifications

Pinout & Package

MAX14750AEWA+T uses a 25-bump WLP (2.26mm × 2.14mm, 0.4mm pitch) with exposed die pad for thermal performance. Bump-side-down mounting requires precise stencil design per JEDEC JESD51-7 thermal guidelines (θ_JA = 52.43°C/W on 4-layer board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail power management applications.

Compared with MAX14720AEWA+T, the MAX14750AEWA+T trades sequencer automation for deterministic GPIO control and removes shipping seal mode - making it ideal for rechargeable systems where host MCU coordination is preferred. Versus TPS65218D0RSLR, it offers 10× lower quiescent current and 60% smaller footprint but fewer rails and no high-current capability.

Availability

MAX14750AEWA+T is available at Aetrix Electronics and suitable for wearable medical devices, portable diagnostic instruments, and smart hearing aids requiring stable component supply across long production lifecycles and tight PCB area budgets.

Supply support for MAX14750AEWA+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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The MAX147xx family was designed specifically for ultra-low-power, multi-rail battery management in size-sensitive portable medical and consumer electronics - emphasizing micro-IQ operation, integrated monitoring, and flexible control architecture.

FAQ

What is the primary functional distinction between MAX14750AEWA+T and MAX14720AEWA+T?

The MAX14750AEWA+T provides individual active-high enable pins (BEN, LEN, HVEN, SWEN) for direct GPIO control of each regulator and switch, whereas the MAX14720AEWA+T uses an internal sequencer with push-button monitoring and programmable reset timing. This makes MAX14750AEWA+T ideal for host MCU–driven power management in rechargeable systems, while MAX14720AEWA+T targets button-initiated, always-on, or shipping-mode applications.

Does MAX14750AEWA+T support battery impedance measurement like the MAX14720AEWA+T?

No - battery impedance measurement is exclusive to the MAX14720AEWA+T and requires BatZUVLO enabled. The MAX14750AEWA+T lacks the dedicated impedance measurement circuitry and associated register controls. Its SWOUT pin functions solely as a general-purpose load switch output without built-in voltage sampling logic for impedance calculation.

What is the maximum continuous output current supported by the buck regulator in MAX14750AEWA+T?

The buck regulator in MAX14750AEWA+T supports up to 250mA continuous output current (IMAXBOUT), as specified in the Electrical Characteristics table on page 6 of the datasheet. This rating assumes proper thermal layout (4-layer board) and input voltage ≥ (VBOUT + 0.1V); derating applies at elevated ambient temperatures or reduced copper area.

Can MAX14750AEWA+T operate with a 1.8V input supply on VCC and still regulate all outputs?

Yes - MAX14750AEWA+T operates with VCC from 1.8V to 5.5V. All regulators (buck, buck-boost, LDO) and the load switch function across this full range. However, the buck-boost output is limited to 2.5V minimum, and LDO dropout increases at low VIN; e.g., at VCC = 1.8V and VLOUT = 1.2V, RON_LDO rises to 3Ω, increasing conduction loss.

Is the 25-bump WLP package of MAX14750AEWA+T pin-compatible with MAX14720AEWA+T?

No - although both use identical 25-bump WLP mechanical outlines (2.26mm × 2.14mm), their bump assignments differ significantly. For example, MAX14720AEWA+T places KIN and RST on bumps D3 and D4, while MAX14750AEWA+T assigns BEN and SWEN to those locations. PCB layouts are not interchangeable; separate footprints are required.