ACT6305
Low Input High Efficiency
Synchronous Step-Up DC-DC Converter
FEATURES
0.95V Typical Startup Voltage
Up to 94% Efficiency
Fully Integrated Power Stage
Fixed 3.3V / 5V or Adjustable Output Voltage
NanoStandbyTM Shutdown Mode
Tiny SOT 23-5 Package
APPLICATIONS
Hand-Held Devices
One to Three Cell Battery Operated Devices
PDAs
Cellular Phones
Digital Cameras
GPS
GENERAL DESCRIPTION
The
ACT6305
is
a
high-efficiency
synchronous step-up DC-DC converter that
consumes just 17µA of quiescent supply current
and is capable of delivering more than 400mA
output
current
using
only
three
external
components. This device achieves a typical
startup voltage of just 0.95V, making this device
ideal for applications operating from 1 or 2
alkaline cells.
This
device
incorporates
an
internal
synchronous rectifier, and achieves excellent
peak efficiencies of up to 94% and features a
proprietary control scheme that ensures high
efficiency over a wide load current range.
The ACT6305 features pin-selectable output
voltages of 3.3V or 5V, or it can also be set
externally to any voltage between 2V and 5V.
The ACT6305 is available in the tiny SOT23-5
Package.
Figure 1. Typical Application Circuit
Active-Semi, Inc.
- 1 -
www.active-semi.com
Data Sheet
Rev PrA, 6/2006
VOUT= 5V
4.7-6.8µH
22µF Ceramic
4.7- 10µF Ceramic
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