The PM6685 is a dual step-down controller able to provide the four output
voltages necessary for notebook system power during normal working conditions
and stand-by mode, with extremely high efficiency conversion (up to 96%) using
a lossless current-sensing technique.
The PM6685 integrates two PWM (Pulse Width Modulation) voltage regulators
and two LDO (Low Drop-Out) linear regulators in one compact, lead-free package.
PWM regulators provide fixed 5V and 3.3V outputs that power the system during
normal operation, while the LDO regulators provide constant 5V and 3.3V outputs
for use during system standby. The integrated LDOs are designed to power the
complete notebook during suspend states, sinking the current directly from the
battery, while during normal working conditions an internal MOSFET switches the
output PWM sections to the 5V and 3.3V LDOs, thereby increasing efficiency and
extending the battery life. The device also features a constant on-time
architecture that ensures fast-load transient response and an embedded voltage
feed-forward circuit that provides almost constant switching frequency
operation.
“We are proud to receive this award, which pays tribute to ST’s long
experience as a leader in power management ICs and smart-power technology,”
said Pietro Menniti, General Manager of ST’s Industrial and Power Conversion
Division. “An ideal choice for notebook computers, tablet PCs, and all
portable, battery-powered equipment, the PM6685 allows the reduction of PCB
area, design cycle time, and Bill of Materials, thereby enabling our customers
to minimize their complete system cost without sacrificing performance.”
Further information on the Electronic Products China’s Top 10 DC-DC 2006
Awards is available at www.epc.com.cn
Click
here for the high-resolution photo
About EPC
Electronic Product China is one of China’s most authoritative electronics
industry trade publications. The magazine’s annual “Top 10 DC-DC” award is
given to a range of dc-dc power products, following a three-stage judging
process. This process includes the publication’s editorial staff, readers’
votes and an expert judging panel. Chip manufacturers’ dc products were
evaluated against a number of categories including design innovation, price
performance and technology advancement.
