Intersil Corporation, a manufacturer of analog and mixed-signal integrated circuits, has introduced a ISL9113, a family of boost converters.
These new boost converters are ideal for single-cell Li-Ion powered products incorporating USB 'on-the-go' (OTG) capability. Available with either a 5V fixed output voltage or an adjustable output, the ISL9113 is a fully-integrated synchronous boost converter that delivers current density of 460mA/square millimeter.
Integrated 1.3A rated synchronous MOSFETs can deliver 5V at 500mA from a single-cell Li-ion battery. This capability is often required to power external peripherals attached to a smartphone's or tablet's USB port, the company said.
ISL9113's 1.8MHz switching frequency permits use of low-profile inductor and capacitors. Low resistance MOSFETs deliver up to 95% efficiency to maximize battery life. The ISL9113 is available in a 0.8mm x 1.36mm WLCSP package or 2mm x 2mm DFN package, the company added.
ISL9113 follows Intersil's low input voltage, synchronous boost converters; ISL9111 and ISL9111A. Their integrated 1A rated synchronous MOSFETs can deliver 100mA from a single-cell alkaline battery. The ISL9111 and ISL9111A address both rechargeable and non-rechargeable battery applications. The ISL9111 includes an under-voltage lockout (UVLO) feature, internally disabling the converter below 0.7V input voltage to prevent over-discharging an attached battery. The ISL9111A has this feature disabled to maximize the usable life of a non-rechargeable single-cell battery.