The patent-pending ACT8700 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 step-down DC/DC converters, one stepup DC/DC converter with over-voltage protection(OVP) for WLED bias, and a full-featured, linearmode Li+ battery charger-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 500mA, 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.
The battery charger incorporates an internal power MOSFET for constant-current/constant-voltage, thermally regulated charging of a single-cell Li+ battery.
The ACT8700 is available in a tiny 4mm x 4mm 24-pin Thin-QFN package that is just 0.75mm thin.

*Multiple Patents Pending
*Li+ Battery Charger with Integrated MOSFET
-ON/OFF Control and Status Indication
*Three Integrated Regulators
-350mA PWM Step-Down DC/DC
-500mA PWM Step-Down DC/DC
-Step-Up DC/DC with OVP for WLED Bias
*Minimal External Components
*4x4mm, Thin-QFN (TQFN44-24) Package
-Only 0.75mm Height
-RoHS Compliant

*Portable Devices and PDAs
*Digital Media Players
*Battery Operated Devices
*GPS Receivers, etc.

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