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ISL91110IINZ-T Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL91110IINZ-T Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 12 page 1 DATASHEET 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 2013, 2014, 2016. 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. High Efficiency Buck-Boost Regulator with 4.5A Switches ISL91110 The ISL91110 is a high-current buck-boost switching regulator for systems using new battery chemistries. It uses Intersil’s proprietary buck-boost algorithm to maintain voltage regulation while providing excellent efficiency and very low output voltage ripple when the input voltage is close to the output voltage. The ISL91110 is capable of delivering at least 2A continuous output current (VOUT = 3.3V) over a battery voltage range of 2.5V to 4.35V. This maximizes the energy utilization of advanced single-cell Li-ion battery chemistries that have significant capacity left at voltages below the system voltage. Its fully synchronous low ON-resistance 4-switch architecture and a low quiescent current of only 35µA optimize efficiency under all load conditions. The ISL91110 supports standalone applications with a fixed 3.3V or 3.5V output voltage or adjustable output voltage with an external resistor divider. Output voltages as low as 1.0V or as high as 5.2V are supported. The ISL91110 is available in a 25-bump, 0.4mm pitch WLCSP (2.33mmx2.07mm) and a 2.5MHz switching frequency, which further reduces the size of external components. Features • Accepts input voltages above or below regulated output voltage • Automatic and seamless transitions between buck and boost modes • Input voltage range: 1.8V to 5.5V • Output current: up to 2A (PVIN = 2.5V, VOUT = 3.3V) • Burst current: up to 3A (PVIN = 3V, VOUT = 3.3V, tON < 600µs, t = 4.6ms) • High efficiency: up to 96% • 35µA quiescent current maximizes light-load efficiency • 2.5MHz switching frequency minimizes external component size • Fully protected for short-circuit, over-temperature, and undervoltage • Small 2.33mmx2.07mm WLCSP Applications • Brownout free system voltage for smartphones and tablet PCs • Wireless communication devices • 2G/3G/4G RF power amplifiers Related Literature • AN1912 “ISL91110IIN-EVZ, ISL91110II2A-EVZ, ISL91110IIA-EVZ Evaluation Boards” FIGURE 1. TYPICAL APPLICATION: VOUT = 3.3V FIGURE 2. EFFICIENCY: VOUT = 3.3V, TA = +25°C PVIN VIN = 1.8V TO 5.5V VOUT = 3.3V IOUT = UP TO 3A ISL911 10IINZ VIN EN LX1 LX2 VOUT FB C1 2x10µF L1 1µH C2 2x22µF MODE NOTE: Confirm w ith Intersil Applica tions E ngine er for any de via tion from a bove circ uit 75 80 85 90 95 100 1 10 100 1000 LOAD CURRENT (mA) VIN = 3.3V VIN = 4.0V VIN = 3.6V VIN = 3.0V VIN = 2.5V February 5, 2016 FN8434.4 |
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