Analog Devices Inc./Maxim Integrated MAX4832ETT30C

Overview

MAX4832ETT30C from Maxim Integrated is a 100mA, 3.0V fixed-output low-dropout linear regulator with integrated current-limiting switch and open-drain FLAG output for overcurrent detection. It operates from 2.5V to 5.5V input, features 90µA quiescent current, 130mV dropout at 100mA, and reverse-current protection. Designed for USB port power management in portable electronics, it delivers stable 3.0V rail with programmable soft-start and latch-off behavior during sustained overload.

For engineers reviewing the MAX4832ETT30C datasheet, MAX4832ETT30C pinout, MAX4832ETT30C application, or MAX4832ETT30C equivalent, key selection criteria include its 3.0V preset output, TDFN-6 package thermal performance, FLAG assertion timing after blanking, shutdown discharge absence, and compatibility with 3.3µF ceramic output capacitors under -40°C to +85°C operation.

Technical Context

The MAX4832ETT30C implements a BiCMOS-based LDO architecture with an internal P-channel pass transistor, precision bandgap reference (1.23V), and error amplifier. Its FLAG function relies on continuous current-sense monitoring and a 5–17ms blanking timer to prevent false triggering during startup or transient overload.

Soft-start is controlled via external capacitor on SS pin (t_SS = C_SS in nF), enabling adjustable ramp time from 1ms (floating) to 150ms (0.1µF). Reverse-current protection actively disables the pass device when V_OUT > V_IN, limiting reverse leakage to ≤2µA.

Key Specifications

Pinout & Package

MAX4832ETT30C uses a 6-pin TDFN package (3mm × 3mm × 0.8mm) with exposed paddle thermally and electrically connected to GND. The compact footprint supports high-density portable PCB layouts while enabling efficient heat dissipation via the EP connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4832EUT30C, the MAX4832ETT30C offers superior thermal performance via its exposed paddle but requires careful GND pad layout; versus MAX4834ETT30C, it trades current capacity for lower quiescent current and tighter dropout-critical for battery runtime and low-VIN operation.

Availability

MAX4832ETT30C is available at Aetrix Electronics and suitable for USB port power management, SDIO interface regulation, and portable camera module supply requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MAX4832ETT30C 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, communications, and consumer applications.

The MAX4832/MAX4833 product line was designed specifically for space-constrained portable electronics requiring accurate current-limited LDOs with intelligent fault signaling-targeting USB, SDIO, and cellular baseband subsystems.

FAQ

What is the maximum input voltage rating for MAX4832ETT30C?

The MAX4832ETT30C has an absolute maximum input voltage of +6V referenced to GND. However, its operational input range is specified from 2.5V to 5.5V. Exceeding 5.5V may cause functional instability or violate the 2.00–2.25V undervoltage lockout threshold, potentially leading to unregulated output or premature shutdown. Always maintain VIN within 2.5V–5.5V for reliable 3.0V regulation.

Does MAX4832ETT30C provide output discharge during shutdown?

No, MAX4832ETT30C does not include output discharge functionality. Unlike the MAX4833 variant, which integrates a 900Ω internal discharge path from OUT to GND in shutdown mode, the MAX4832ETT30C leaves the output floating when disabled. System designers must add an external bleed resistor if rapid output discharge is required for sequencing or safety compliance.

How is the FLAG output of MAX4832ETT30C used in system fault handling?

The FLAG output of MAX4832ETT30C is an open-drain signal that pulls low when load current exceeds 115–135mA for longer than the blanking time (5–17ms). It remains latched low until IN or SHDN is cycled. In system design, FLAG connects to a microcontroller GPIO to trigger firmware-level port disable, log fault events, or initiate graceful shutdown-enabling deterministic response to overcurrent conditions without relying on thermal shutdown.

What capacitor values are required for stable operation of MAX4832ETT30C?

MAX4832ETT30C requires a minimum 3.3µF ceramic output capacitor (X5R or X7R dielectric) with ESR <0.2Ω for stability across -40°C to +85°C. A 0.1µF ceramic capacitor between IN and GND is mandatory for input bypassing. For improved noise suppression and transient response, 10µF output capacitance is recommended-though designers must verify capacitance retention over temperature for chosen dielectric.

Can MAX4832ETT30C operate with input voltage below its output voltage?

Yes, MAX4832ETT30C can tolerate V_IN < V_OUT without damage due to its reverse-current protection circuitry. When V_OUT exceeds V_IN, the internal pass transistor turns off, limiting reverse current to ≤2µA. This feature prevents back-driving of upstream supplies-essential in systems with multiple power domains or shared battery buses where output nodes may be pre-biased.