ISL9120IRTAZ-T

ISL9120IRTAZ-T is an ISL9120IR series compact high efficiency low power buck-boost regulator that accepts input voltages either above or below the regulated output voltage. This regulator automatically transitions between buck and boost modes without significant output disturbance. It has automatic bypass functionality for when the input voltage is generally within 1% to 2% of the output voltage, there will be a direct bypass connection between the VIN and VOUT pins. In addition to the automatic bypass functionality, this also has a forced bypass functionality with the use of the BYPS pin. The forced bypass power saving mode can be chosen if voltage regulation is not required. The device consumes less than 3.5µA of current over the operating temperature range in the forced bypass mode. Typical applications are smartphones and tablets, portable consumer and wearable devices.

• Accepts input voltages above or below regulated output voltage
• Automatic bypass mode functionality
• Automatic and seamless transitions between buck and boost modes
• Input voltage range from 1.8V to 5.5V, adjustable output voltage
• Selectable forced bypass power saving mode
• Adaptive multilevel current limit scheme to optimize efficiency at low and high currents
• Output current is up to 800mA (VIN = 2.5V, VOUT = 3.3V), -40°C to +85°C temperature range
• High efficiency is up to 98%
• 41µA quiescent current maximizes light-load efficiency
• Fully protected for over-temperature and undervoltage