DATASHEET
ISL91117 FN8569
Rev 3.00
March 7, 2014 High Efficiency Synchronous Boost Converter with 4.2A Switches and Output
Disconnect
The ISL91117 is a highly-integrated boost switching regulator
for battery powered applications. The device provides a power
supply solution for products using dual-cell or three-cell
alkaline, NiCd or NiMH, or one-cell Li-ion or Li-polymer battery. Features This device is capable of delivering an output current of 1.5A
with PVIN = 3.3V and VOUT = 5V. The use of a synchronous
rectifier maximizes efficiency at high loads. No-load quiescent
current of only 35ВµA optimizes efficiency under light-load
conditions. Forced PWM and/or synchronization to an external
clock may also be selected for noise sensitive applications. Output current: up to 1.5A (PVIN = 3.3V, VOUT = 5V) The ISL91117 is designed for standalone applications and
supports 5V fixed output voltage or variable output voltages
with an external resistor divider. Power supply solution size is
minimized by a 2.34mm x 1.72mm WLCSP and a 2.6MHz
switching frequency, which allows for the use of tiny,
low-profile inductors and ceramic capacitors to minimize the
size of the solution. Related Literature Fixed 5V or adjustable output High efficiency: up to 96% 35ВµA quiescent current maximizes light-load efficiency True input-output disconnect when disabled 2.6MHz switching frequency minimizes external component
size Selectable forced-PWM mode and external synchronization Fully protected for short-circuit, over-temperature and
undervoltage Small 2.34mm x 1.72mm WLCSP Applications Smart phones and tablets AN1918, ISL91117II7-EVZ, ISL91117IIA-EVZ Evaluation
Boards L1 Input voltage range: 1.8V to 4.8V Wireless communication devices Products including portable HDMI and USB-OTG 1ВµH 100 …
