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ADP3607
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
50 mA Switched Capacitor
Voltage Boost with Regulated Output
FUNCTIONAL BLOCK DIAGRAM
OSC
CLOCK
GEN
1.5 V
V
REF
S1
C
P
–
GND
C
P
+
V
OUT
S3
FB V
SENSE
S2
S4
SD
V
IN
+
V
OUT
5.0V
V
IN
3.3V
*C
O
4.7mF
+
*C
IN
4.7mF
+
ADP3607-5
*C
P
4.7mF
OFF ON
0
V
SENSE
V
IN
C
P
+
C
P
–
SD
V
OUT
*FOR BEST PERFORMANCE, 10mF IS RECOMMENDED
C
P
: SPRAGUE, 293D475X0010B2W
C
IN
, C
O
: TOKIN, 1E475ZY5UC205F
GND
D1
SD103
Figure 1. Typical Application Circuit
FEATURES
Fully Regulated Output Voltage (5 V and Adjustable)
Input Voltage Range From 3 V to 5 V
50 mA Output Current
Output Accuracy: 65%
High Switching Frequency: 250 kHz
SO-8 and TSSOP-8 Packages
–408C to +858C Ambient Temperature Range
APPLICATIONS
Computer Peripherals and Add-On Cards
Portable Instruments
Battery Powered Devices
Pagers and Radio Control Receivers
Disk Drives
Mobile Phones
GENERAL DESCRIPTION
The ADP3607 is a 50 mA regulated output switched capacitor
voltage doubler. It provides a regulated output voltage with
minimum voltage loss and requires a minimum number of ex-
ternal components. In addition, the ADP3607 does not require
the use of an inductor.
The internal oscillator of the ADP3607 runs at 500 kHz nomi-
nal frequency, which produces an output switching frequency of
250 kHz. This allows for the use of smaller charge pump and
filter capacitors.
The ADP3607 provides an accuracy of – 5% with a typical shut-
down current of 150 m A. It can also operate from a single posi-
tive input voltage as low as 3 V. The ADP3607 is offered with
the regulation fixed at 5 V, or adjustable via external resistors
over a 3 V to 9 V range.