REV. A
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a
ADP3610
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 1999
320 mA Switched Capacitor
Voltage Doubler
FEATURES
Push-Pull Charge Pump Doubler Reduces Output Ripple
+3.0 V to +3.6 V Operation
V
OUT
> +5.4 V @ 320 mA Maximum Load
Output Impedance, R
TOTAL
≤ 1.66 V
Shutdown Capability
Overvoltage Protection: V
IN
> +4 V
Operating Temperature Range: –208C to +858C
Thermally Enhanced 16-Lead TSSOP Package
APPLICATIONS
High Current Doublers
LCD Panels
Cellular Phones
Inductorless Boost Converters
GENERAL DESCRIPTION
The ADP3610 is a push-pull switched-capacitor converter volt-
age doubler. The term “push-pull” refers to two charge pumps
working in parallel and in opposing phase to deliver charge to
support the output voltage. When one capacitor is pumping
charge to the output, the other is recharging. This technique
minimizes voltage loss and output voltage ripple.
The converter accommodates input voltages from +3 V to
+3.6 V and can provide 320 mA using 2.2 µF MLCC pump
capacitors. Converter operation can be enabled or disabled
simply by an input signal. The package is enhanced with Analog
Devices’ proprietary Thermal Coastline feature, which allows
up to 980 mW of power dissipation at room temperature. The
exceptionally thin TSSOP-16 package and the requirement of
only capacitors (no inductors) to support the converter opera-
tion allows slim designs, e.g., for TFT or LCD display panels.
C
IN
1mF
CP2
2.2mF
CP1
2.2mF
V
IN
V
OUT
SD
V
OUT
V
IN
GND
ADP3610
C
O
1mF
Figure 1. Typical Application Circuit
FUNCTIONAL BLOCK DIAGRAM
1MHz
OSC
V
IN
OVER-
VOLTAGE
PROTECTION
SD
GND
V
OUT
CM2CP2CM1CP1
DRV
DRIVE LOGIC
DRV
ADP3610