FEATURES
• Buck or Boost Configuration
• Voltage Mode Control
• 2.7-V to 6-V Input Voltage Range for VDD and VS
• Programmable PWM/PSM Control
− Up to 2-MHz Switching Frequency in PWM
− Synchronous Rectification in PWM
− Less than 200-
A IDD in PSM
• Integrated UVLO and POR
• Integrated Soft-Start
• Synchronization
• Shutdown Current <1 ㎂
DESCRIPTION
The Si9166 is a programmable topology controller for today’s
continuous changing portable electronic market. Si9166
provides flexibility of utilizing various battery configurations
and chemistries such as NiCd, NiMhy, or Li+ with input voltage
range of 2.7 V to 6 V. An additional flexibility is provided with
topology programmability to power multiple loads such as
power amplifiers, microcontrollers, or baseband logic IC’s.
The converters can be programmed to be synchronous Buck
or Boost topology. For ultra-high efficiency, converters are
designed to operate in synchronous rectified PWM mode
under full load while transforming into externally controlled
pulse skipping mode (PSM) under light load. All these features
are provided by the Si9166 without sacrificing system
integration requirements of fitting these circuits into ever
demanding smaller and smaller space. The Si9166 is capable
of switching up to 2 MHz to minimize the output inductor and
capacitor size in order to decrease the overall converter size.
The Si9166 is available in both standard and lead (Pb)-free
TSSOP-16 pin packages and specified to operate over the
industrial temperature range of −25℃ to 85℃.