Rev PrB, 20-Feb-08
Preliminary Product Information―All Information Subject to Change
ACT6308
Low Input High Efficiency
Synchronous Step-Up DC/DC Converter
FEATURES
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•
•
•
•
•
1V Typical Startup Voltage
Up to 89% Efficiency
Fully Integrated Power Stage
Fixed 3.3V/5V or Adjustable Output Voltage
NanoStandby
TM
Shutdown Mode
Tiny SOT23-5 Package
−
RoHS Compliant Package
GENERAL DESCRIPTION
The ACT6308 is a high efficiency synchronous
step-up DC/DC converter that consumes just 17µA
of quiescent supply current using only three exter-
nal components. This device achieves a typical
startup voltage of just 1V, making it ideal for appli-
cations operating from 1 or 2 alkaline cells.
This device incorporates an internal synchronous
rectifier, and achieves excellent peak efficiency of
up to 89% and features a proprietary control
scheme that ensures high efficiency over a wide
load current range.
The ACT6308 features pin-selectable output volt-
ages of 3.3V or 5V, or it can also be set externally
to any voltage between 2V and 5V. The ACT6308 is
available in a tiny SOT23-5 package.
APPLICATIONS
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•
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Hand-Held Devices
One to Three Cell Battery Operated Devices
PDAs
Cellular Phones
Digital Cameras
GPS
TYPICAL APPLICATION CIRCUIT
Efficiency vs. Output Current
V
IN
L 2.2µH
LX
OUT
V
OUT
3.3V
1.00
ACT6308-001
EN
C1
2.2µF
G
FB
C2
4.7µF
Efficiency (%)
ENABLE
ACT6308
0.90
V
IN
= 2.4V
0.80
0.70
V
IN
= 1.8V
0.60
0.50
V
IN
= 1.5V
V
OUT
= 3.3V
FB = GND
10
100
1000
Pb-free
0.1
1.0
Output Current (mA)
Innovative Products.
Active Solutions.
-1-
www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
