Analog Devices Inc./Maxim Integrated MAX14590ETA+T

Overview

MAX14590ETA+T from Maxim Integrated is a high-current overvoltage protector IC featuring an integrated 48mΩ (typ) n-channel MOSFET switch, preset 15V ±3.3% overvoltage lockout threshold, and 3A continuous current capability. It safeguards low-voltage systems-such as PMIC inputs in portable devices-against input faults up to +36V by disconnecting the output when VIN exceeds the trip level.

For engineers reviewing the MAX14590ETA+T datasheet, MAX14590ETA+T pinout, MAX14590ETA+T application, or MAX14590ETA+T equivalent, key selection criteria include its adjustable OVLO range (4V–20V), thermal shutdown at +150°C (typ), soft-start timing (15ms typ), and TDFN-EP (2mm × 2mm) package with exposed pad for thermal management.

Technical Context

The MAX14590ETA+T implements a charge-pump–driven internal FET with precise voltage monitoring via dual-path OVLO detection: one path uses the internal 15V reference, while the other accepts external resistor-divider–set thresholds above 0.35V. Its 15ms startup debounce prevents false turn-on during power-up transients.

Operation relies on temperature-compensated bandgap references and hysteresis-controlled logic that disables the FET within microseconds of overvoltage detection. Thermal shutdown activates at +150°C (typ) with 20°C hysteresis, and the device supports output capacitor charging up to 1000µF without overcurrent fault triggering due to controlled 15ms soft-start ramp.

Key Specifications

Pinout & Package

MAX14590ETA+T is housed in an 8-pin TDFN-EP package (2mm × 2mm) with exposed pad soldered to GND for enhanced thermal dissipation. The package supports JEDEC-standard reflow and has θ_JA = 83.9°C/W on a four-layer board.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar overvoltage protection applications.

Compared with TPD3S014RTER and LT4363IMS-1#PBF, the MAX14590ETA+T delivers higher continuous current (3A vs. 2.5A/unknown), simpler implementation (integrated FET vs. external), and precise 15V OVLO without sacrificing thermal robustness-making it optimal for space-constrained, high-current consumer power inputs.

Availability

MAX14590ETA+T is available at Aetrix Electronics and suitable for smartphone power input protection, tablet PC charger interface, and mobile internet device USB OTG port applications requiring stable component supply and RoHS-compliant packaging.

Supply support for MAX14590ETA+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, mixed-signal, and power management ICs for demanding industrial, automotive, and consumer applications.

The MAX14590ETA+T belongs to Maxim's overvoltage protection product line, engineered specifically for high-current, compact portable electronics where reliable front-end fault isolation and minimal PCB footprint are critical.

FAQ

What is the exact overvoltage lockout threshold for MAX14590ETA+T?

The MAX14590ETA+T has a factory-trimmed internal overvoltage lockout threshold of 15V ±3.3% (typical 15V). This value is guaranteed across the full -40°C to +85°C operating temperature range and applies when the OVLO pin is tied to GND. External resistor dividers can override this default to set thresholds between 4V and 20V.

Can MAX14590ETA+T operate with input voltages below 2.2V?

No. The MAX14590ETA+T specifies a minimum input voltage of +2.2V for proper operation. Below this, the internal charge pump cannot generate sufficient gate drive for the integrated n-channel MOSFET, resulting in undefined R_ON and potential failure to turn on. The device is not rated or characterized for sub-2.2V operation.

Does MAX14590ETA+T require an external capacitor on the OVLO pin?

No external capacitor is required on the OVLO pin. The MAX14590ETA+T uses a high-impedance comparator input (leakage ±100nA) and relies solely on resistor-divider networks for threshold setting. Adding capacitance would distort timing and compromise debounce behavior; the datasheet explicitly defines OVLO as a DC-adjustment node only.

How does thermal shutdown behave in MAX14590ETA+T during sustained overload?

Under sustained overload, the MAX14590ETA+T disables the internal FET when junction temperature reaches +150°C (typ), then remains off until temperature falls by ~20°C (typ) due to built-in hysteresis. This prevents rapid on/off cycling and allows safe cooldown. Recovery is automatic and does not require power-cycle or reset signal.

Is the exposed pad (EP) of MAX14590ETA+T electrically connected to GND internally?

Yes-the exposed pad (EP) of MAX14590ETA+T is internally connected to GND and must be soldered to a PCB ground plane. It serves as both the primary thermal dissipation path and a functional ground terminal; using it as the sole GND connection is discouraged, but it must be tied to the system ground net to ensure proper thermal performance and ESD robustness.