ACT8770 Channel Integrated Power Management Handheld Portable Equ
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Product Brief, 19-Feb-08 Advanced InformationAll Information Subject Change
ACT8770
Channel Integrated Power Management Handheld Portable Equipment FEATURES
Multiple Patents Pending Battery Charger with Integrated MOSFET
Auto-Select Charge Current USB) ON/OFF Control Status Indication
GENERAL DESCRIPTION
patent-pending ACT8770 complete, costeffective, highly efficient ActivePMUintegrated power management solution that ideal wide range portable handheld equipment. This device integrates step-down DC/DC converters, three dropout linear regulators (LDOs) full-featured linear-mode battery charger into single, thin, space-saving package. REG1 REG2 fixed-frequency, current-mode step-down DC/DC converters that optimized high efficiency capable supplying 350mA 550mA, respectively. three LDOs high PSRR linear regulators, each capable supplying 250mA. battery charger incorporates internal power MOSFET thermally regulated charging single-cell battery. ACT8770 available tiny 24-pin Thin-QFN package that just 0.75mm thin.
Five Integrated Regulators
350mA Step-Down DC/DC 550mA Step-Down DC/DC 250mA High PSRR 250mA High PSRR 250mA High PSRR
Minimal External Components 4x4mm, Thin-QFN (TQFN44-24) Package
Only 0.75mm Height RoHS Compliant
APPLICATIONS
Portable Devices PDAs Digital Media Players Battery Operated Devices Receivers, etc.
SYSTEM BLOCK DIAGRAM
Battery Selectable ACIN CHGLEV nSTAT Single Cell Battery Charger
REG1
Step-Down DC/DC
OUT1 0.645V 3.3V 350mA OUT2 0.645V 3.3V 550mA OUT3 1.4V 3.7V 250mA OUT4 1.4V 3.7V 250mA OUT5 1.4V 3.7V 250mA
REG2
nMSTR nIRQ System Control Step-Down DC/DC
REG3
REG4
ACT8770
Active
REG5
Innovative Products. Active Solutions.
ActivePMU
www.active-semi.com Copyright 2008 Active-Semi, Inc.
trademark Active-Semi.
Product Brief, 19-Feb-08
ACT8770
PRODUCT OPTIONS
Block
CHGR REG1 REG2 REG3 REG4 REG5
Function
Battery Charger Step-Down DC/DC Step-Down DC/DC
Output Voltage
4.20V (4.10V 4.30V available) 0.645V 3.3V
Capability
Selectable 350mA 550mA 250mA
1.4V 3.7V
250mA 250mA
Output voltage options detailed this table represent standard voltage options, available samples production orders. Contact Active-Semi more information regarding semi-custom output voltage combinations. Contact factory additional available products custom requirements.
FUNCTIONAL BLOCK DIAGRAM
VSYS
BODY VSYS CONTROL
ACT8770
Battery
Adaptor
4.3V
VINUVLO CURRENT SENSE VOLTAGE SENSE PRECONDITION
nSTAT
4.0V
CHARGE STATUS
2.9V Charge Control
THERMAL REGULATION
ACIN OUT2 CHGLEV FLOAT
110°C
Battery
REG1
OUT1 OUT1 GP12
VINUVLO
VSYS nMSTR PUSH BUTTON OUT2 nIRQ System Control REG2
Battery
OUT2 OUT2 GP12
Battery
REG3 REG4
OUT3 OUT3
OUT4 OUT4
REG5
OUT5 OUT5
Innovative Products. Active Solutions.
www.active-semi.com Copyright 2008 Active-Semi, Inc.
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