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BU33UV7NUX-E2

BU33UV7NUX-E2

Rohm Semiconductor
Boost Switching Regulator IC Positive Fixed 3.3V 1 Output 500mA 10-UFDFN Exposed Pad
8,457 in stock
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Overview

The BU33UV7NUX-E2 is a high-efficiency synchronous boost switching regulator from Rohm Semiconductor designed for low-voltage applications. It provides a fixed 3.3V output from input sources as low as 0.6V, making it ideal for devices powered by single-cell alkaline or NiMH batteries. The IC features an ultra-low quiescent current of 7uA and an integrated power-save mode to maximize battery life in portable electronics.

Why Choose This Part

The device features a unique pass-through function and a disconnect function during shutdown to prevent battery leakage. Its 800kHz switching frequency allows for the use of small external inductors, while the VSON010X3020 package reduces PCB area. The ultra-low 7uA quiescent current is specifically optimized for applications that require high efficiency at light loads.

Applications

Single-Cell Battery Power
Boosting voltage from a single 1.2V NiMH or 1.5V alkaline cell to a stable 3.3V rail for microcontrollers and sensors.
Wireless Peripherals
Providing efficient power for wireless mice and remote controllers that spend significant time in standby modes.
Portable Medical Devices
Powering compact, battery-operated personal health monitors where high efficiency and small footprint are critical.
Asset Tracking
Enabling long-term operation for IoT sensors and trackers using small-capacity battery cells.

Key Specifications

Function Step-Up
Topology Boost
Output Type Fixed
Mounting Type Surface Mount
Package / Case 10-UFDFN Exposed Pad
Current - Output 500mA
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 800kHz
Operating Temperature -40degC ~ 85degC (TJ)
Synchronous Rectifier Yes
Voltage - Input (Max) 4.5V
Voltage - Input (Min) 0.6V
Supplier Device Package VSON010X3020
Voltage - Output (Min/Fixed) 3.3V

Getting Started

Designers should prioritize low-ESR ceramic capacitors and place the input and output capacitors as close to the VSON010 package pins as possible to minimize noise. Evaluation of the Auto-PFM/PWM transition is recommended to ensure stability across the full 500mA output current range. Refer to the manufacturer layout guidelines to manage the thermal performance of the 10-UFDFN exposed pad.

Also Consider

MCP1640T-I/MC MCHPMicrochip Technology - Offers a similar low-startup voltage of 0.65V with a 500kHz switching frequency in a compact DFN package.
TPS61221 TITexas Instruments - A fixed 3.3V boost converter with an even lower quiescent current of 5.5uA for extreme low-power designs.
MAX1724 Maxim Integrated / Analog Devices - Features an ultra-low 1.5uA quiescent current, though it supports a lower maximum output current than the BU33UV7NUX.

Categories

Power Management > Switching Regulators Consumer Electronics > Battery Management