ACT8352

Product Brief, 05-May-09 Advanced Information¯All Information Subject to Change ACT8352 Four-Channel Integrated Power Management IC for Handheld Portable Equipment FEATURES  Four Integrated Regulators  350mA PWM Step-Down DC/DC  80mA Low Noise LDO  150mA Low Noise LDO  300mA Low Noise LDO The patent-pending ACT8352 is a complete, cost effective, highly-efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment. This device integrates one PWM step-down DC/DC converter and two low noise, low dropout linear regulators (LDOs) in a single, thin, space-saving package. This device is ideal for a wide range of portable handheld equipment that can benefit from the advantages of ActivePMU technology but does not require a high level of integration. REG1 is a fixed-frequency, current-mode PWM step-down DC/DC converter that is optimized for high efficiency and is capable of supplying up to 350mA output current. REG1’s output is available in a variety of factory-preset output voltage options, and an adjustable output voltage mode is also available. REG2, REG3, and REG4 are low noise, high PSRR linear regulators that are capable of supplying up to 80mA, 150mA, and 300mA, respectively. Finally, an I2C serial interface provides programmability for the DC/DC converters and LDOs. The ACT8352 is available in a tiny 3mm  3mm 16-pin Thin-QFN package that is just 0.75mm thin. GENERAL DESCRIPTION  Independent Enable/Disable Control  I2CTM Compatible Serial Interface  Programmable Output Voltages  Configurable Operating Modes  Minimal External Components  33mm, Thin-QFN (TQFN33-16) Package  Only 0.75mm Height  RoHS Compliant APPLICATIONS  Portable Devices and PDAs  MP3/MP4 Players  Wireless Handhelds  GPS Receivers, etc. SYSTEM BLOCK DIAGRAM REG1 Battery Step-Down DC/DC nRSTO nPBIN OUT1 0.6V to 3.9V Up to 350mA REG2 nIRQ System Control LDO PWRHLD SCL OUT2 0.6V to 3.9V Up to 80mA REG3 LDO SDA OUT3 0.6V to 3.9V Up to 150mA ACT8352 REG4 TM LDO Active OUT4 0.9V to 3.9V Up to 300mA PMU Innovative PowerTM -1ActivePMUTM is a trademark of Active-Semi. www.active-semi.com Copyright © 2009 Active-Semi, Inc. ACT8352 Product Brief, 05-May-09 PRODUCT OPTIONS Output Voltage Block REG1 REG2 0.6V to 3.9V REG3 REG4 : 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. Capability 350mA Function Step-Down DC/DC LDO LDO LDO 300mA 150mA 80mA 0.6V to 3.9V FUNCTIONAL BLOCK DIAGRAM OUT1 VP Active- Sem i To Battery nRSTO ACT8352 Reset Timer SW OUT1 OUT1 EN1 GP EN2 EN34 INL To Battery or OUT1 SCL R EG 1 REG2 OUT2 SDA LDO REFBP Reference System Control REG3 OUT3 LDO GA REG4 OUT4 LDO EP Innovative PowerTM -2Copyright © 2009 Active-Semi, Inc. www.active-semi.com