ACT6308 Ver la hoja de datos (PDF) - Active-Semi, Inc
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ACT6308 Datasheet PDF : 9 Pages
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ACT6308
Rev PrB, 20-Feb-08
Preliminary Product Information―All Information Subject to Change
Low Input High Efficiency
Synchronous Step-Up DC/DC Converter
FEATURES
• 1V Typical Startup Voltage
• Up to 89% Efficiency
• Fully Integrated Power Stage
• Fixed 3.3V/5V or Adjustable Output Voltage
• NanoStandbyTM Shutdown Mode
• Tiny SOT23-5 Package
− RoHS Compliant Package
APPLICATIONS
• Hand-Held Devices
• One to Three Cell Battery Operated Devices
• PDAs
• Cellular Phones
• Digital Cameras
• GPS
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.
TYPICAL APPLICATION CIRCUIT
L 2.2µH
VIN
ENABLE
C1
2.2µF
LX
OUT
ACT6308
EN
FB
G
VOUT
3.3V
C2
4.7µF
Efficiency vs. Output Current
1.00
0.90
0.80
VIN = 2.4V
0.70
0.60
0.50
0.1
VIN = 1.8V
VIN = 1.5V
VOUT = 3.3V
FB = GND
1.0
10
100
1000
Output Current (mA)
Pb-free
Innovative Products. Active Solutions.
-1-
www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
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