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RP605Z283B-E2-T

RP605Z283B-E2-T

Nisshinbo Micro Devices Inc.
Battery Management, Power Supplies PMIC 20-WLCSP-P3 (2.32x1.71)
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Overview

The RP605Z283B-E2-T is an ultra-low quiescent current Buck-Boost DC/DC converter with an integrated LDO regulator, designed specifically for battery-powered IoT and wearable devices. It features a remarkably low supply current of 300nA, allowing for extended battery life in systems that spend most of their time in standby mode. This PMIC simplifies power sequencing by providing both a high-efficiency switching output and a clean linear output in a compact 20-pin WLCSP package.

Why Choose This Part

The primary advantage is the industry-leading 300nA quiescent current, which significantly reduces power loss during idle periods. Its buck-boost architecture ensures stable power delivery even as battery voltage drops below the output setpoint, maximizing energy extraction. The integration of a DC/DC and an LDO into a single 20-WLCSP package reduces the bill of materials and board complexity.

Applications

IoT Sensor Nodes
Ideal for long-life wireless sensors that require a stable supply from varying battery voltages (1.8V to 5.5V) while maintaining sub-microamp standby currents.
Wearable Electronics
The small 2.32mm x 1.71mm WLCSP footprint and integrated LDO save critical PCB space in fitness trackers and smartwatches.
Energy Harvesting Systems
The ultra-low quiescent current makes it suitable for systems powered by small solar cells or thermal generators where every nanoamp of efficiency matters.
Portable Medical Devices
Provides high-accuracy power (1.5 percent) for sensitive biometric sensors and low-power microcontrollers.

Key Specifications

Applications Battery Management, Power Supplies
Mounting Type Surface Mount
Package / Case 20-XFBGA, WLCSP
Current - Supply 300nA
Voltage - Supply 1.8V ~ 5.5V
Operating Temperature -40degC ~ 85degC
Supplier Device Package 20-WLCSP-P3 (2.32x1.71)

Getting Started

Engineers should evaluate the RP605 series using the manufacturer's dedicated evaluation boards to measure ultra-low current consumption accurately. Ensure that high-quality, low-ESR ceramic capacitors are used as specified in the datasheet to maintain stability and performance across the full 1.8V to 5.5V input range. Layout is critical due to the small WLCSP pitch; use a multi-layer PCB with thermal vias if high-current operation is expected.