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MAX1724EZK33+T

ADIMAX1724EZK33+T

Analog Devices Inc./Maxim Integrated
Boost Switching Regulator IC Positive Fixed 3.3V 1 Output 400mA (Switch) SOT-23-5 Thin, TSOT-23-5
Active3,948 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The MAX1724EZK33+T is an ultra-low-power synchronous boost converter designed to provide a fixed 3.3V output from input sources as low as 0.8V. It features a remarkably low 1.5 microampere quiescent current, making it ideal for applications powered by single-cell alkaline or silver-oxide batteries. By integrating the synchronous rectifier, this device eliminates the need for an external Schottky diode, reducing both component count and board space.

Why Choose This Part

The primary advantage is the ultra-low quiescent current of 1.5 microamperes, which is significantly lower than standard boost converters. Its internal synchronous rectifier improves efficiency and reduces footprint by removing the need for an external diode. Additionally, the wide input range of 0.8V to 5.5V allows for maximum energy extraction from depleting battery cells.

Applications

Single-Cell Battery Powered Devices
Boosting voltage from a single 1.5V alkaline or 1.55V silver-oxide cell to a stable 3.3V rail for microcontrollers.
Energy Harvesting
Capturing low-voltage energy from solar cells or thermoelectric generators due to the low 0.8V startup requirement.
Remote IoT Sensors
Extending battery life in sleep-heavy applications where the 1.5 microampere idle current minimizes standby drain.

Key Specifications

Function Step-Up
Topology Boost
Output Type Fixed
Mounting Type Surface Mount
Package / Case SOT-23-5 Thin, TSOT-23-5
Current - Output 400mA (Switch)
Number of Outputs 1
Output Configuration Positive
Operating Temperature -40degC ~ 85degC (TA)
Synchronous Rectifier Yes
Voltage - Input (Max) 5.5V
Voltage - Input (Min) 0.8V
Supplier Device Package TSOT-23-5
Voltage - Output (Min/Fixed) 3.3V

Getting Started

To implement this part, select a low-ESR 10 microhenry inductor and ceramic capacitors as specified in the datasheet to maintain the 1% output accuracy. Since it is a fixed-voltage TSOT-23-5 device, no feedback resistor divider is required, simplifying PCB layout. Ensure the SHDN pin is tied to the input voltage or a logic-high signal to enable the device.

Also Consider

TPS61221 TITexas Instruments - Offers a similar low-input voltage boost capability but with a slightly higher 5 microampere typical quiescent current.
MAX17222 Analog Devices - Features an even lower 300nA quiescent current and selectable output voltages in a smaller uDFN package.
MCP1640 MCHPMicrochip Technology - Provides a higher output current capability up to 350mA while maintaining a low startup voltage of 0.65V.

Categories

Power Management > Switching Regulators Wearables & Medical > Energy Harvesting Consumer Electronics > Battery Management
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