www.DataSheet4U.com
MIC2292/93
Micrel
MIC2292/93
High Frequency PWM White LED Drivers with Internal Schottky Diode an...
www.DataSheet4U.com
MIC2292/93
Micrel
MIC2292/93
High Frequency PWM White LED Drivers with Internal Schottky Diode and OVP
General Description
The MIC2292 and MIC2293 are high frequency, Pulse Width Modulator (PWM) boost regulators optimized for constantcurrent, white LED driver applications. Because of their constant PWM switching frequencies of 1.6MHz and 2MHz, respectively, the MIC2292/93 can use the smallest external components, allowing designers to avoid sensitive IF bands in their RF applications. The products feature an internal Schottky diode and two levels of output over
voltage protection allowing a small size and efficient DC/DC solution that requires only four external components. The 2.5V to 10V input
voltage range of MIC2292/3 allows direct operation from 1- and 2-cell Li Ion as well as 3- to 4-cell NiCad/NiMH/Alkaline batteries. The MIC2292/3 products are available in a small size 2mm × 2mm 8-lead MLF™ package and have a junction temperature range of –40°C to +125°C. All support documentation can be found on Micrel’s web site at www.micrel.com.
Features
2.5V to 10V input
voltage Output
voltage up to 34V Internal Schottky diode 1.6MHz PWM operation (MIC2292) 2.0MHz PWM operation (MIC2293) Stable with ceramic
capacitors 15V and 34V output over
voltage protection options 500mA switch current rating 95mV feedback
voltage <1% line and load regulation <1µA shutdown current Over-temperature protection UVLO 8-lead (2mm × 2mm) MLF™packa...