MIC2287CYD5-TR

MIC2287CYD5-TR is a 1.2MHz pulse width modulated (PWM), boost-switching regulator that is optimized for constant-current, white LED driver applications. With a maximum output voltage of 37V and a switch current of over 500mA, the MIC2287C easily drives a string of up to 6 white LEDs in series, ensuring uniform brightness and eliminating several ballast resistors. The MIC2287C implements a constant frequency, 1.2MHz PWM control scheme. The high frequency PWM operation saves board space by reducing external component sizes. The added benefit of the constant frequency PWM scheme as opposed to variable frequency topologies is much lower noise and input ripple injected back into the battery source. Application includes white LED driver for backlighting: cell phones, PDAs, GPS systems, digital cameras, MP3 players, IP phones, and LED flashlights.

• Supply voltage range from 2.5V to 10V, under voltage lockout is 2.1V typical at (TA = +25°C)
• Quiescent current is 2.5mA typical at (VIN = VEN = 3.6V, VOUT = 10V, IOUT = 10mA, TA = +25°C)
• Shutdown current is 1μA maximum at (VEN = 0V, IOUT = 10mA, TA = +25°C)
• Feedback input current is 450nA typical at (VFB = 95mV, IOUT = 10mA, TA = +25°C)
• Load regulation is 0.5% typical at (5mA ≤ IOUT ≤ 20mA)
• Switch current limit is 750mA typical at (VIN = VEN = 3.6V, VOUT = 10V, IOUT = 10mA, TA = +25°C)
• Switch leakage current is 5μA maximum at (VEN = 0V, VSW = 10V)
• Switching frequency is 1.2MHz typical at (VIN = VEN = 3.6V, VOUT = 10V, IOUT = 10mA, TA = +25°C)
• Operating temperature range from -40°C to +105°C
• 5-lead SOT-23 package