Detailed Explanation of MAX15023ETG+ Step-down Regulator | Maxim Ultra-Low Quiescent Current DC-DC Controller
Product Overview
The MAX15023ETG+ is an ultra-compact synchronous step-down DC-DC converter that integrates efficient MOSFETs and control circuits. It supports a wide input voltage range of 2.5V to 5.5V and an output current of up to 300mA. Its typical quiescent current is only 450nA and it provides programmable output voltage, making it particularly suitable for battery-powered and portable devices with strict requirements for standby power consumption. This device adopts a 1.5mm×1.5mm WLP (Wafer-Level Package), which can achieve a very small PCB footprint and has complete protection functions such as soft start, overcurrent protection and thermal shutdown.
Key technical parameters
Parameter value
The input voltage range is 2.5V to 5.5V
The output voltage is adjustable from 0.6V to VIN
The maximum output current is 300mA
Switching frequency: 1.5MHz (typical)
Static current: 450nA (typically, under light load)
Conversion efficiency as high as 90% (typical)
Package 1.5mm × 1.5mm WLP-12
The operating temperature range is -40°C to +85°C
Protection functions include overcurrent, thermal shutdown and under-voltage locking
The on/off control can be optionally controlled by the EN pin
Product Features
Ultra-low quiescent current: typically only 450nA, greatly extending battery life
Ultra-small package: 1.5×1.5mm WLP-12, saving PCB space
Wide input range and high efficiency: Compatible with 3.3V/5V systems; Up to 90% in the high-efficiency mode
High switching frequency: 1.5MHz helps to use small inductors and capacitors
Complete protection mechanism: overcurrent, over-temperature and under-voltage locking to ensure system reliability
Soft start function: Prevents transient shock during startup
Enable pin: Flexible control of power consumption status
Typical application fields
🔋 Battery-powered and portable devices (wearable devices, wireless sensors)
🌐 Internet of Things (IoT) nodes (low-power monitors, environmental sensors)
🏠 Smart home (smart lock, remote control)
Youdaoplaceholder0 Industrial control (data acquisition module, power management unit)
🚗 Vehicle auxiliary power supply (vehicle sensors, aftermarket electronics)
🎮 Wearable and health monitoring devices
Compatible and alternative models
Comparison of the characteristics of model manufacturers
MIC5319 Microchip's low quiescent current LDO alternative
TPS62743 TI ultra-low power step-down converter, 300mA
The ADM660 Analog Devices are boosters with only 100µA quiescent current
XC9237 Torex Semiconductor 350kHz/1.2MHz selectable frequency
RT8250 Richtek small package, high-efficiency voltage reducer
Note: The alternative products may differ in packaging and protection characteristics. Please be sure to check the specific parameters when selecting the model.
Feedback resistor: Use a precise resistance value according to the required output voltage
Summary
The MAX15023ETG+, with its ultra-low quiescent current, ultra-small WLP package and high efficiency, is an ideal choice for application scenarios with extremely high requirements for power consumption and space. Whether in battery-powered iot nodes or smart portable terminals, this device can provide a stable and reliable voltage reduction solution.
