Analog Devices Inc./Maxim Integrated MAX1819EBL20

Overview

MAX1819EBL20 from Maxim Integrated is a 500mA low-dropout linear regulator with preset 2.0V output, ±1% initial accuracy, 125µA ground current, and 90mV dropout at full load-designed for power rail regulation in portable battery-powered systems such as notebook computers and cellular handsets.

For engineers reviewing the MAX1819EBL20 datasheet, MAX1819EBL20 pinout, MAX1819EBL20 application, or MAX1819EBL20 equivalent, this device offers verified dual-mode voltage selection (preset or adjustable), active-low open-drain POK output, thermal shutdown at 170°C, and UCSP package compatibility for space-constrained PCB layouts.

Technical Context

The MAX1819EBL20 integrates a 1.25V reference, error amplifier, and internal P-channel MOSFET pass transistor (R_DS(ON) ≈ 0.25Ω) to achieve low dropout and load-independent quiescent current. Its Dual Mode™ architecture selects between factory-trimmed 2.0V output (via SET = GND) or adjustable operation (via external resistor divider on SET pin).

Regulation relies on feedback comparison of V_SET against 1.25V reference; when V_SET < 50mV, internal divider engages. The POK output asserts low when V_OUT falls below 93% of nominal (1.86V), with 100kΩ pull-up to OUT recommended for logic-level signaling.

Key Specifications

Pinout & Package

MAX1819EBL20 is housed in a 6-pin UCSP (Ultra-Compact Silicon Package), measuring 1.5mm × 1.5mm × 0.6mm, with solder balls on bottom side for board-level mounting. Thermal performance is optimized with copper area shared among IN, OUT, and GND pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with TPS7A2020PDBVR and ADP160ACBZ-2.0-R7, the MAX1819EBL20 uniquely delivers 500mA at 90mV dropout in a 6-ball UCSP with integrated POK and shutdown-making it the sole option for space-constrained, high-current portable designs requiring power sequencing and extended battery life.

Availability

MAX1819EBL20 is available at Aetrix Electronics and suitable for notebook computers, cellular handsets, and USB hubs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MAX1819EBL20 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX1819EBL20 belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable electronics where ultra-low quiescent current, small footprint, and precise voltage regulation are essential.

FAQ

What output voltage does the MAX1819EBL20 deliver?

The MAX1819EBL20 delivers a factory-preset 2.0V output with ±1% initial accuracy over the full operating temperature range (-40°C to +85°C). This fixed output is achieved by connecting the SET pin to GND; no external resistors are needed. The device also supports adjustable operation (1.25V–5.0V) if SET is configured with an external voltage divider, but the MAX1819EBL20 suffix explicitly denotes the 2.0V preset variant.

Does the MAX1819EBL20 include power-good monitoring?

Yes, the MAX1819EBL20 features an active-low, open-drain POK (power-ok) output that asserts low when the regulated output falls below 93% of nominal (i.e., below 1.86V for the 2.0V output). To generate a logic-high signal when regulation is valid, connect a 100kΩ pull-up resistor from POK to OUT. During shutdown, POK is forced low regardless of output voltage-ensuring deterministic behavior during power sequencing.

What is the dropout voltage specification for the MAX1819EBL20 at full load?

The MAX1819EBL20 guarantees a dropout voltage of 90mV at 500mA load current. This means it maintains regulation with only a 90mV difference between input and output-enabling operation down to VIN = 2.09V when delivering 2.0V. This low dropout is achieved using an internal P-channel MOSFET pass transistor with ~0.25Ω R_DS(ON), and the value is confirmed in the Electrical Characteristics table under "Dropout Voltage (Note 3)" for V_OUT = 2.0V.

How does the MAX1819EBL20 manage thermal protection?

The MAX1819EBL20 incorporates thermal shutdown that activates at a junction temperature of 170°C, with 20°C hysteresis. When triggered, the pass transistor turns off, allowing the die to cool; conduction resumes once temperature drops to ~150°C. This results in pulsed output during continuous overload-protecting the device without requiring external circuitry. The 840mW maximum power dissipation at +70°C (derated above that temperature) is validated for standard PCB layouts with one square-inch copper area.

What package type and size does the MAX1819EBL20 use?

The MAX1819EBL20 uses a 6-pin UCSP (Ultra-Compact Silicon Package) with bottom-mounted solder balls, measuring 1.5mm × 1.5mm × 0.6mm. This wafer-level chip-scale package enables high-density routing and superior thermal performance when mounted on PCBs with adequate copper pour under the package. Pin assignments follow a 3×2 grid (A1–C3), with IN, POK, SHDN, OUT, SET, and GND assigned to specific ball positions as defined in the Pin Configuration diagram.