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ACT8309_12 参数 Datasheet PDF下载

ACT8309_12图片预览
型号: ACT8309_12
PDF下载: 下载PDF文件 查看货源
内容描述: 1.5A , PWM降压型DC / TDFN封装的DC [1.5A, PWM Step-Down DC/DCs in TDFN]
分类和应用:
文件页数/大小: 10 页 / 363 K
品牌: ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
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ACT8309/8310/8311
Rev 1, 15-Nov-12
1.5A, PWM Step-Down DC/DCs in TDFN
FEATURES
Multiple Patents Pending
Up to 95% High Efficiency
Up to 1.5A Guaranteed Output Current (ACT8311)
1.35MHz Constant Frequency Operation
Internal Synchronous Rectifier Eliminates
Schottky Diode
ACT8309: Up to 900mA
ACT8310: Up to 1.2A
ACT8311: Up to 1.5A
100% Duty Cycle Low-Dropout Operation
0.1µA Shutdown Current
Small TDFN33-8 Package
RoHS-Compliant
GENERAL DESCRIPTION
The patent-pending ACT8309/ACT8310/ACT8311
are current-mode, fixed-frequency PWM, synchro-
nous step-down DC/DC converters that are capable
of delivering 1.5A with efficiency of up to 95%.
These devices operate with a fixed frequency of
1.35MHz, minimizing noise in sensitive equipment
as well as optimizing both efficiency and component
size and cost.
These devices feature very low-resistance power
MOSFET and 100% duty cycle operation, making
them ideal choices for portable applications requir-
ing a 3.0V or 3.3V rail to be generated from a Li+
battery.
The ACT8311 is capable of supplying up to 1.5A of
output current, while the ACT8309 and ACT8310
are capable of supplying up to 900mA and 1.2A,
respectively. All three devices have adjustable out-
put voltages that are programmable down to 1.2V.
Contact Active-Semi for custom fixed output voltage
availability.
Enable/Disable Control
Minimal External Components
APPLICATIONS
Wireless Handhelds
Portable Devices
GPS/PND equipment
SYSTEM BLOCK DIAGRAM
2.7V to 5.0V
ON
OFF
Power-OK
Output
IN
SW
V
OUT
Up to 1.5A
Pb-free
ACT8311
EN
POK
GP
G
FB
Innovative Power
TM
-1-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.