1 datasheet to request the full datasheet, please visit www.intersil.com/products/ISL91106 high efficiency high current buck-boost regulator with bypass mode ISL91106, ISL91106a the ISL91106 and ISL91106a are highly integrated buck-boost switching regulators that accept input voltages either above or below the regulated output voltage. unlike other buck-boost regulators, these regulators au tomatically transitions between operating modes without significant output disturbance. the devices also include a selectab le bypass mode for low power consumption in applications that have a sleep or low-power mode. these devices are capable of delivering up to 2a of output current (pvin = 2.8v, v out = 3.3v) and provide excellent efficiency due to their fully synchronous 4-switch architecture. no load quiescent current of only 45a also optimizes efficiency under light-load conditions. the ISL91106 and ISL91106a ar e designed for stand-alone applications. they support 3.3v an d 3.4v fixed output voltages or variable output voltages with an external resistor divider. output voltages as low as 1v or as high as 5.2v are supported using an external resistor divider. the ISL91106 and ISL91106a requir e only a single inductor and very few external components. power supply solution size is minimized by a 2.15mmx1.51mm wlcsp and a 2.5mhz switching frequency, which further reduces the size of external components. related literature ? an1959, ?ISL91106iix-evz, ISL91106aiix -evz evaluation board user guide? features ? ISL91106 with 3.8a switches ? ISL91106a with 4.2a switches ? 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 (pvin = 2.8v, v out = 3.3v): -2.1a (ISL91106a) - 2a (ISL91106) ? high efficiency: up to 96% ? 45a quiescent current maxi mizes light load efficiency ? 2.5mhz switching frequency mi nimizes external component size ? selectable forced pwm mode ? selectable bypass power saving mode ? fully protected for over-temperature, overcurrent and undervoltage ? small 2.15mmx1.51mm wlcsp applications ? smartphones and tablet pcs ? wireless communication devices ? 2g/3g/4g power amplifiers figure 1. typical application ISL91106iinz, ISL91106iiqz or ISL91106iiaz, ISL91106aiiaz figure 2. efficiency vs output current (v out =3.3v) vout fb c 2 2x22f pvin v in = 1.8v to 5.5v vin mode1 mode2 c 1 10f ISL91106iin z , ISL91106aiinz gnd pgnd lx1 lx2 l 1 1h v out = 3.3v mode1 mode2 mode 00disable 01bypass 10en, pwm 11en, auto 9 , 1 9 9 , 1 9 / 2 $ ' & 8 5 5 ( 1 7 p $ ( ) ) , & , ( 1 & < 9 , 1 9 9 , 1 9 november 20, 2015 fn8679.2 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, 2015. 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.
ISL91106, ISL91106a 2 intersil products are manufactured, assembled and tested utilizing iso9001 quality systems as noted in the quality certifications found at www.intersil.com/en/suppor t/qualandreliability.html intersil products are sold by description only. intersil corporat ion reserves the right to make changes in circuit design, soft ware 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 responsi bility is assumed by intersil or its subsid iaries for its use; nor for any infringem ents 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 i ntersil or its subsidiaries. for information regarding intersil corporation and its products, see www.intersil.com fn8679.2 november 20, 2015 for additional products, see www.intersil.com/en/products.html submit document feedback
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