DATASHEET To request the full datasheet, please visit www.intersil.com/products/isl91133 High Efficiency 2.3A Boost Regulator With Input-to-Output Bypass ISL91133 Features The ISL91133 is an integrated boost switching regulator for battery powered applications. The device provides a power supply solution for products using a one cell Li-ion or Li-polymer battery. • Input voltage range: 2.35V to 5.4V The device is capable of delivering up to 2.3A output current from VIN = 2.5V and VOUT = 3.3V. The no load quiescent current is only 108μA in Boost Mode and 45μA in Forced Bypass Mode, which significantly reduces the standby consumption. • Output current: up to 2.3A (VIN = 2.5V, VOUT = 3.3V) • Burst current up to 2.5A (VIN = 2.5V, VOUT = 3.3V, tON < 600μs, T = 4.6ms) • High efficiency: up to 96% • 108μA quiescent current minimizes standby consumption in Boost Mode, 45μA in Forced Bypass Mode The ISL91133 offers a Bypass Mode operation where the output is directly connected to the input through a 38mΩ MOSFET to allow a significantly lower dropout voltage. The Bypass Mode can be entered by an external command, or by auto bypass. The Forced Bypass Mode allows the output voltage to operate close to the input voltage and improves the efficiency under these conditions. • 2.5MHz switching frequency minimizes external component size The ISL91133 is designed to support 6 fixed output voltages ranging from 3.15V to 5V. A voltage select pin is available for each output variant to scale up the output voltage by a small offset to compensate the load transient droop. • Load disconnect when disabled The ISL91133 requires only an inductor and a few external components to operate. The 2.5MHz switching frequency further reduces the size of external components. • Smartphones and tablet PCs The ISL91133 is available in a 16 bump, 0.4mm pitch, 1.78mm x 1.78mm WLCSP. • Forced Bypass or Auto Bypass Modes with a 38mΩ switch • PFM mode at light load currents • Fully protected for overcurrent, over-temperature and undervoltage • Small 1.78mm x 1.78mm WLCSP Applications • Wireless communication devices • 2G/3G/4G RF power amplifiers • USB OTG power source Related Literature EFFICIENCY (%) • AN1958 “ISL91133 Evaluation Board User Guide” 100 98 96 94 92 90 88 86 84 82 80 78 76 74 72 70 0.001 4VIN 3VIN 2.7VIN 2.5VIN 0.01 0.1 1 IOUT (A) FIGURE 1. TYPICAL APPLICATION September 5, 2014 FN8680.0 1 FIGURE 2. EFFICIENCY vs LOAD CURRENT, VOUT = 3.3V CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC. 2014. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL91133 For additional products, see www.intersil.com/en/products.html Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/en/support/qualandreliability.html Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com Submit Document Feedback 2 FN8680.0 September 5, 2014