Analog Devices Inc./Maxim Integrated MAX1976AETT160+T

Overview

MAX1976AETT160+T from Maxim Integrated is a low-dropout linear regulator with 300mA output, ±0.5% output voltage accuracy at 1.60V, 100mV dropout at full load, and a 70ms active-low open-drain RESET flag-designed for power management in battery-powered handheld devices requiring stable low-voltage rails.

For engineers reviewing the MAX1976AETT160+T datasheet, MAX1976AETT160+T pinout, MAX1976AETT160+T application, or MAX1976AETT160+T equivalent, key selection criteria include guaranteed 300mA delivery under 1.62V–3.6V input, thermal/short-circuit protection, shutdown current <1µA, and compatibility with 4.7µF ceramic output capacitance.

Technical Context

The MAX1976AETT160+T integrates a p-channel MOSFET pass transistor (R_DS(ON) = 0.33Ω) enabling load-independent quiescent current (90µA typ) and dropout defined as V_IN – V_OUT = 0.33Ω × I_OUT. Its error amplifier compares internal reference against feedback to regulate output within ±0.5% over load, line, and temperature.

RESET functionality monitors V_OUT with 82.5% threshold hysteresis and asserts for ≥70ms after regulation; SHDN is active-low with logic-level compatibility (V_IL ≤ 0.6V, V_IH ≥ 1.4V) and <5nA bias current at +85°C.

Key Specifications

Pinout & Package

MAX1976AETT160+T is housed in a 6-pin TDFN package (3mm × 3mm, 0.8mm height) with exposed paddle (EP) for thermal dissipation. Pin 1 is IN; Pin 2 is GND; Pin 3 is SHDN; Pin 4 is RESET; Pin 5 is I.C. (internally connected, connect to GND); Pin 6 is OUT.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPS7A0516PDBVR and NCP1117ST16T3G, MAX1976AETT160+T uniquely combines 300mA delivery at 1.62V input, 100mV dropout, and factory-configured 70ms RESET-enabling single-chip power-good sequencing in space-constrained portable designs without external components.

Availability

MAX1976AETT160+T is available at Aetrix Electronics and suitable for notebook computers, cellular phones, portable audio players, and PCMCIA cards requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX1976AETT160+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 high-reliability industrial, automotive, and portable applications.

The MAX1963A/MAX1976A product line delivers low-input-voltage, high-accuracy LDOs with integrated RESET for battery-powered handheld equipment where minimal dropout and guaranteed power-good timing are critical.

FAQ

What output voltage does the MAX1976AETT160+T deliver?

The MAX1976AETT160+T delivers a factory-trimmed fixed output voltage of 1.60V. This value is laser-trimmed during production and specified with ±0.5% accuracy at +25°C and ±2.5% over the full -40°C to +85°C operating temperature range and full 1mA–300mA load current. The "160" suffix in the part number explicitly denotes the 1.60V output.

Does the MAX1976AETT160+T include a reset output, and what is its timing behavior?

Yes, the MAX1976AETT160+T features an active-low, open-drain RESET output. It asserts low when the output voltage falls below 82.5% of nominal (1.32V) and remains asserted for a minimum of 70ms after V_OUT rises above regulation. This 70ms delay is specific to the MAX1976A variant and distinguishes it from the MAX1963A's 2.2ms delay. RESET is actively pulled low during shutdown.

What package type and pin configuration does the MAX1976AETT160+T use?

The MAX1976AETT160+T uses a 6-pin TDFN package (3mm × 3mm, 0.8mm height) with exposed paddle (EP). Pin 1 is IN, Pin 2 is GND, Pin 3 is SHDN, Pin 4 is RESET, Pin 5 is I.C. (internally connected, recommended tied to GND), and Pin 6 is OUT. This matches the "TT" in the part number, indicating the TDFN-6 variant.

What is the minimum input voltage required for the MAX1976AETT160+T to regulate at 1.60V?

The MAX1976AETT160+T requires a minimum input voltage of 1.62V to operate, but to maintain regulation at 1.60V output, the input must exceed the dropout voltage. At 300mA load, dropout is 100mV, so V_IN must be ≥1.70V. At lighter loads, dropout decreases linearly (e.g., 33mV at 100mA), allowing regulation down to ~1.633V input.

How does the MAX1976AETT160+T handle thermal overload conditions?

The MAX1976AETT160+T incorporates thermal-overload protection that disables the pass transistor when junction temperature exceeds +165°C. After shutdown, the device remains off until the junction cools by 15°C (to ~+150°C), then resumes operation-resulting in pulsed output under sustained overload. This protects the IC and PCB while maintaining safe operating temperatures without requiring external thermal management circuitry.