ACT8750 데이터 시트보기 (PDF) - Active-Semi, Inc
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ACT8750 Datasheet PDF : 2 Pages
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ACT8750
Product Brief, 09-Nov-07
Advanced Information - All Information Subject to Change
Six Channel Integrated Power Management IC
for Handheld Portable Equipment
FEATURES
• Multiple Patents Pending
• Six Integrated Regulators
− 350mA PWM Step-Down DC/DC
− 550mA PWM Step-Down DC/DC
− Step-Up DC/DC with OVP for WLED Bias
− 150mA Low Noise LDO
− 150mA Low Noise LDO
− 150mA Low Noise LDO
• Minimal External Components
• 4x4mm, Thin-QFN (TQFN44-24) Package
− Only 0.75mm Height
− RoHS Compliant
APPLICATIONS
• Portable Devices and PDAs
• Wireless Handhelds
• DMB Enabled Devices
• GPS Receivers, etc.
GENERAL DESCRIPTION
The patent-pending ACT8750 is a complete, cost-
effective, highly-efficient ActivePMUTM power man-
agement solution that is ideal for a wide range of
portable handheld equipment. This device inte-
grates two PWM step-down DC/DC converters, one
step-up DC/DC converter with over-voltage protec-
tion (OVP) for WLED bias, and three low dropout
linear regulators (LDOs) into a single, thin, space-
saving package.
REG1 and REG2 are fixed-frequency, current-mode
PWM step-down DC/DC converters that are opti-
mized for high efficiency and are capable of supply-
ing up to 350mA and 550mA, respectively. REG3 is
a fixed-frequency, step-up DC/DC converter that
safely and efficiently biases a string of up to seven
white-LEDs for backlighting applications. The three
LDOs are low noise, high PSRR linear regulators
capable of supplying up to 150mA each.
The ACT8750 is available in a tiny 4mm x 4mm
24-pin Thin-QFN package that is just 0.75mm thin.
SYSTEM BLOCK DIAGRAM
Innovative Products. Active Solutions.
-1-
ActivePMUTM is a trademark of Active-Semi.
www.active-semi.com
Copyright © 2007 Active-Semi, Inc.
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