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ACT8325 Datasheet Preview

ACT8325 Datasheet

Dual PWM Step-Down DC/DCs in TDFN33

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ACT8325 pdf
Active-Semi
ACT8325
Rev0, 13-May-08
Dual PWM Step-Down DC/DCs in TDFN33
FEATURES
Multiple Patents Pending
Two Integrated Step-Down DC/DC Converters
REG1: 350mA
REG2: 550mA
180° Out-of-Phase Operation
Reduces Input Capacitor Requirements
Fixed or Adjustable Output Voltage Options
Independent Enable/Disable Control
Minimal External Components
3x3mm, Thin-DFN (TDFN33-10) Package
Only 0.75mm Height
RoHS-Compliant
APPLICATIONS
Portable Devices and PDAs
MP3/MP4 Players
Wireless Handhelds
GPS Receivers
GENERAL DESCRIPTION
The patent-pending ACT8325 integrates two step-
down DC/DCs into a single, thin, space-saving
package to provide a cost-effective, highly-efficient
ActivePMUTM power management solution. This
device is ideal for a wide range of portable hand-
held equipment that can benefit from the advan-
tages of ActivePMU technology but do not require a
high level of integration.
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. Both
outputs are available in a wide range of factory-
preset output voltage options, and an adjustable
output voltage mode is also available.
The ACT8325 is available in a tiny 3mm x 3mm
10-pin Thin-DFN package that is just 0.75mm thin.
www.DaStaSYheSetT4UE.cMom BLOCK DIAGRAM
Battery
ON1
ON2
System
Control
ACT8325
PMUActive
TM
REG1
Step-Down
DC/DC
REG2
Step-Down
DC/DC
OUT1
Adjustable, or
1.2V to 3.3V
Up to 350mA
OUT2
Adjustable, or
1.2V to 3.3V
Up to 550mA
Innovative PowerTM
ActivePMUTM is a trademark of Active-Semi.
-1-
www.active-semi.com
Copyright © 2008 Active-Semi, Inc.



Active-Semi
Active-Semi

ACT8325 Datasheet Preview

ACT8325 Datasheet

Dual PWM Step-Down DC/DCs in TDFN33

No Preview Available !

ACT8325 pdf
Active-Semi
FUNCTIONAL BLOCK DIAGRAM
Active-Semi
ACT8325
ON1
UVLO
ON2
GA
www.DataSheet4U.com
ACT8325
Rev0, 13-May-08
VP1
To Battery
SW1
FB1
GP12
VP2
OUT1
To Battery
SW2
FB2
GP12
OUT2
Innovative PowerTM
ActivePMUTM is a trademark of Active-Semi.
-2-
www.active-semi.com
Copyright © 2008 Active-Semi, Inc.


Part Number ACT8325
Description Dual PWM Step-Down DC/DCs in TDFN33
Maker Active-Semi
Total Page 11 Pages
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