DESCRIPTION
SiP12501 is a boost converter IC for single or double cell NiMH or Alkaline battery pack, which can drive white LEDs connected in parallel to provide backlight in hand-held devices. Designed with an internal low threshold power MOSFET, it is capable of starting up with a low battery voltage of 0.65 V. For best efficiency performance, the SiP12501 is designed to operate in PWM mode with 600 kHz switching. The voltage-mode PWM design is internally compensated, reducing the external parts count. It accepts input voltages from 0.65 V to 3.3 V, regulates output current of up to 60 mA from a 0.9 V input. The LED current can be adjusted externally for its brightness control. SiP12501 features low shutdown current of under 1 µA, internal power MOS, thermal shutdown protection and antiringing control.

FEATURES
• Voltage mode control with internal frequency compensation
• 0.65 V to 3.3 V input voltage range
• Low startup voltage: 0.65 V
• PWM control with 600 kHz fixed switching frequency
• Analog control of LED intensity
• Power supply from output voltage
• Regulated output current
• Integrated UVLO and soft-start
• Logic controlled shutdown (< 1 µA)
• High efficiency: typical 75 %
• Internal power MOS
• Antiringing switch to minimize EMI
• Thermal shutdown
• Minimum external components
• PowerPAK® MLP33-6 package

APPLICATIONS
• White LED backlighting
• Handheld devices
• Digital cameras
• Portable applications
• LCD bias supplies