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| Product Brief, 09-Nov-07 Advanced Information - All Information Subject to Change ACT8750 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 GENERAL DESCRIPTION The patent-pending ACT8750 is a complete, costeffective, highly-efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment. This device integrates two PWM step-down DC/DC converters, one step-up DC/DC converter with over-voltage protection (OVP) for WLED bias, and three low dropout linear regulators (LDOs) into a single, thin, spacesaving package. REG1 and REG2 are fixed-frequency, current-mode PWM step-down DC/DC converters that are optimized for high efficiency and are capable of supplying 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. APPLICATIONS * Portable Devices and PDAs * Wireless Handhelds * DMB Enabled Devices * GPS Receivers, etc. SYSTEM BLOCK DIAGRAM Innovative Products. Active Solutions. ActivePMUTM is a trademark of Active-Semi. -1- www.active-semi.com Copyright (c) 2007 Active-Semi, Inc. ACT8750 Product Brief, 09-Nov-07 PRODUCT OPTIONS Block REG1 REG2 REG3 REG4 REG5 REG6 Function Step-Down DC/DC Step-Down DC/DC Step-Up DC/DC LDO LDO LDO Output Voltage 0.645V to 3.3V Capability 350mA 550mA Up to 27.5V Up to 7 WLEDs 150mA 1.4V to 3.7V 150mA 150mA : Output voltage options detailed in this table represent standard voltage options, and are available for samples or production orders. Contact Active-Semi for more information regarding semi-custom output voltage combinations. : Contact factory for additional available products or custom requirements. FUNCTIONAL BLOCK DIAGRAM Innovative Products. Active Solutions. -2- www.active-semi.com Copyright (c) 2007 Active-Semi, Inc. |
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