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ADP3605 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADP3605
Description  120 mA Switched Capacitor Voltage Inverter with Regulated Output
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADP3605 Datasheet(HTML) 1 Page - Analog Devices

   
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REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
ADP3605
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
120 mA Switched Capacitor
Voltage Inverter with Regulated Output
FUNCTIONAL BLOCK DIAGRAM
SD
OSC
CLOCK
GEN
FEEDBACK
CONTROL
LOOP
SD
SD
B
S
D
S
D
N
C
P+
C
P
PN
N
S1
S3
VIN
VOUT
VSENSE
GND
S2
S4
ADP3605
+
–3.0V
VIN
*CO
4.7 F
+
*CIN
4.7 F
+
ADP3605-3
*CP
4.7 F
OFF
ON
0
VSENSE
VIN
CP+
CP
SD
VOUT
*FOR BEST PERFORMANCE, 10 F IS RECOMMENDED
CP : SPRAGUE, 293D475X0010B2W
CIN, CO: TOKIN, 1E475ZY5UC205F
GND
Figure 1. Typical Application Circuit
FEATURES
Fully Regulated Output Voltage (–3 V and Adjustable)
High Output Current: 120 mA
Output Accuracy:
3%
250 kHz Switching Frequency
Low Shutdown Current: 2
A Typical
Input Voltage Range from 3 V to 6 V
SO-8 and RU-14 Packages
–40 C to +85 C Ambient Temperature Range
APPLICATIONS
Voltage Inverters
Voltage Regulators
Computer Peripherals and Add-On Cards
Portable Instruments
Battery Powered Devices
Pagers and Radio Control Receivers
Disk Drives
Mobile Phones
GENERAL DESCRIPTION
The ADP3605 is a 120 mA regulated output switched capacitor
voltage inverter. It provides a regulated output voltage with
minimum voltage loss and requires a minimum number of ex-
ternal components. In addition, the ADP3605 does not require
the use of an inductor.
Pin-for-pin and functionally compatible with the ADP3604, the
internal oscillator of the ADP3605 runs at 500 kHz nominal
frequency which produces an output switching frequency of
250 kHz. This allows for the use of smaller charge pump and
filter capacitors.
The ADP3605 provides an accuracy of
±3% with a typical shut-
down current of 2
µA. It can also operate from a single positive
input voltage as low as 3 V. The ADP3605 is offered with the
regulation fixed at –3 V or adjustable via external resistors over
a –3 V to –6 V range.


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