Microchip | MIC2292-34YML-TR

MIC2292-34YML TR and MIC2293 are high frequency, Pulse Width Modulator (PWM) boost regulators optimized for constant-current, white LED driver applications. Because of their constant PWM switching frequencies of 1.6 MHz and 2 MHz, 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 overvoltage protection allowing a small size and efficient DC/DC solution that requires only four external components. The 2.5 V to 10 V 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 2 mm x 2 mm 8-lead MLF package and have a junction temperature range of –40°C to +125°C.

Key Features:

• 2.5 V to 10 V input voltage.
• Output voltage up to 34 V.
• Internal Schottky diode.
• 1.6 MHz PWM operation (MIC2292).
• 2 MHz PWM operation (MIC2293).
• Stable with ceramic capacitors.
• 15 V and 34 V output overvoltage protection options.
• 500 mA switch current rating.
• 95 mV feedback voltage.
• <1% line and load regulation.
• <1 µA shutdown current.
• Over-temperature protection.
• UVLO.
• 8-lead (2 mm x 2 mm) MLF package.
• –40°C to +125°C junction temperature range.

Applications:

• White LED driver for backlighting.
• Cell phones.
• PDAs.
• GPS systems.
• Digital cameras.
• MP3 players.
• IP phones.
• Constant current power supplies.