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ACT6907 fiches techniques PDF

Active-Semi - 600mA Synchronous Step Down Converter

Numéro de référence ACT6907
Description 600mA Synchronous Step Down Converter
Fabricant Active-Semi 
Logo Active-Semi 





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ACT6907 fiche technique
Data Sheet
Rev 0, 5/2006
ACT6907
1.6MHz, 600mA Synchronous
Step Down Converter in SOT23-5
FEATURES
High Efficiency - Up to 95%
Very Low 24µA Quiescent Current
Guaranteed 600mA Output Current
1.6MHz Constant Frequency Operation
Internal Synchronous Rectifier Eliminates
Schottky Diode
Adjustable Output Voltages From 0.6V to VIN
Fixed Output Voltage Options Available
100% Duty Cycle Low-Dropout Operation
0.1µA Shutdown Current
Tiny SOT23-5 Package
APPLICATIONS
Blue Tooth Headsets
Portable Audio Players
Mobile Phones
Wireless and DSL Modems
Digital Still Cameras
Portable Instruments
GENERAL DESCRIPTION
The ACT6907 is a fixed-frequency current-
mode synchronous PWM step down converter
that is capable of delivering 600mA of output
current while achieving peak efficiency of 95%.
Under light load conditions, the ACT6907
operates in a proprietary pulse skipping mode
that consumes just 24µA of supply current,
maximizing battery life in portable applications.
The ACT6907 operates with a fixed frequency of
1.6MHz, minimizing noise in noise-sensitive
applications and allowing the use of small
external components. The ACT6907 is an ideal
solution for applications powered by Li-Ion
batteries or other portable applications that
require small board space.
The ACT6907 is available in a variety of fixed
output voltage options, 1.5V, 1.8V, 2.5V, 2.7V,
2.8V, and 3.3V, and is also available in an
adjustable output voltage version capable of
generating output voltages from 0.6V to VIN .The
ACT6907 is available in the tiny 5-pin SOT23-5
package.
VIN
ENABLE
IN SW
ACT6907
EN FB
G
CIN
L
VOUT
COUT
Figure 1. Typical Application Circuit and Efficiency
Active-Semi, Inc.
- 1 - www.active-semi.com

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