a
50 mA Switched Capacitor
Voltage Boost with Regulated Output
ADP3607
FUNCTIONAL BLOCK DIAGRAM
C
P
+
C
P
–
FEATURES
Fully Regulated Output Voltage (5 V and Adjustable)
Input Voltage Range From 3 V to 5 V
50 mA Output Current
Output Accuracy: 5%
High Switching Frequency: 250 kHz
SO-8 and TSSOP-8 Packages
–40 C to +85 C Ambient Temperature Range
APPLICATIONS
Computer Peripherals and Add-On Cards
Portable Instruments
Battery Powered Devices
Pagers and Radio Control Receivers
Disk Drives
Mobile Phones
V
S1
IN
S4
S3
S2
V
OUT
SD
OSC
CLOCK
GEN
FB
1.5 V
V
REF
V
SENSE
GENERAL DESCRIPTION
GND
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
µA.
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.
V
IN
3.3V
*C
IN
+
4.7 F
*C
P
4.7 F
+
SD103
D1
V
IN
C
P
+
V
OUT
+
*C
O
4.7 F
V
OUT
5.0V
ADP3607-5
C
P
–
SD
OFF
ON
0
GND
V
SENSE
*FOR BEST PERFORMANCE, 10 F IS RECOMMENDED
C
P
: SPRAGUE, 293D475X0010B2W
C
IN
, C
O
: TOKIN, 1E475ZY5UC205F
Figure 1. Typical Application Circuit
REV. 0
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.
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
ADP3607–SPECIFICATIONS
1, 2, 3
(V
Parameter
OPERATING SUPPLY RANGE
SUPPLY CURRENT
Shutdown Mode
OUTPUT VOLTAGE
4
V
O
V
O
Symbol
V
S
I
S
IN
= 3.3 V @ T
A
= +25 C, C
P
= C
O
= 4.7 F unless otherwise noted.)
Min
3.0
Typ
3.3
3.5
150
4.85
4.75
5
5
Max
5
6
200
5.15
5.25
Units
V
mA
µA
V
V
Condition
–40°C < T
A
< +85°C
V
SD
= V
IN
, –40°C < T
A
< +85°C
I
O
= 25 mA
I
O
= 10 mA to 50 mA
–40°C
≤
T
A
≤
+85°C
3.0 V
≤
V
S
≤
3.6 V
I
O
= 10 mA–25 mA
I
O
= 10 mA–50 mA
C
IN
= C
O
= 4.7
µF
I
LOAD
= 25 mA
I
LOAD
= 50 mA
V
IN
= 3.3 V
–40°C < T
A
< +85°C
212
2.4
LOAD REGULATION
OUTPUT RESISTANCE (Open Loop)
OUTPUT RIPPLE VOLTAGE
∆V
O
/I
O
R
O
V
RIPPLE
0.3
0.25
11
16
31
250
288
mV/mA
mV/mA
Ω
mV
mV
kHz
V
µA
V
µA
SWITCHING FREQUENCY
SHUTDOWN
Logic Input High
Input Current
Logic Input Low
Input Current
f
S
V
IH
I
IH
V
IL
I
IL
1
0.4
1
NOTES
1
Capacitors C
IN
, C
O
and C
P
in the test circuit are 4.7
µF
with 0.1
Ω
ESR. Capacitors with higher ESR may reduce output voltage and efficiency.
2
See Figure 1 conditions.
3
All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
4
For the adjustable version, a 1% resistor should be used to maintain output voltage tolerance. For both device types, tolerances can be improved by >1% using larger
value and lower ESR capacitors for C
O
and C
P
.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS
1
(T
A
= +25°C unless otherwise noted)
ORDERING GUIDE
Input Voltage (V
IN
to GND) . . . . . . . . . . . . . . . . . . . . +7.5 V
Output Voltage (V
OUT
to GND) . . . . . . . . . . . . . . . . . . +12 V
Output Short Circuit Protection . . . . . . . . . . . . . . . . . . . 1 sec
θ
JA
, SO-8 Package
2
. . . . . . . . . . . . . . . . . . . . . . . . . 150°C/W
θ
JA
, TSSOP-8 Package
2
. . . . . . . . . . . . . . . . . . . . . . 208°C/W
Operating Temperature Range . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering 10 sec) . . . . . . . . +300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
NOTES
1
This is a stress rating only, operation beyond these limits can cause the device to be
permanently damaged.
2
θ
JA
is specified for worst case conditions with device soldered on a circuit board.
Model
ADP3607AR-5
ADP3607AR
ADP3607ARU-5
ADP3607ARU
Output Voltage
5 V, 50 mA
Adjustable, 50 mA
5 V, 50 mA
Adjustable, 50 mA
Package Option*
SO-8
SO-8
RU-8
RU-8
*SO = Small Outline Package; RU = Thin Small Outline Package.
Contact the factory for the availability of other output voltage options.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADP3607 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
–2–
REV. 0
ADP3607
Table I. Other Members of ADP360x Family
1
Output
Current
50 mA
120 mA
120 mA
120 mA
Package
Option
2
SO-8
SO-8
SO-8
SO-8
PIN FUNCTION DESCRIPTIONS
Pin Mnemonic
Comments
Nom. –3 V
±
3% Inverter
Nom. –3 V
±
3% Inverter
Nom. –3 V
±
5% Inverter
Adj. Output Inverter
Function
Positive Terminal for the Pump Capacitor.
Input Voltage. Connect a low ESR bypass
capacitor between this pin and device
ground to minimize supply transients.
Negative Terminal for the Pump Capacitor.
Logic Level Shutdown. Apply a logic Hi or
connect to V
IN
to shut down the device. In
Shutdown mode, the charge pump is turned
off and quiescent current is reduced. Apply
a logic low or connect to ground for normal
operation.
Output Voltage Sense Line. This is used to
improve load regulation by eliminating IR
drops on the high current carrying output
traces. For normal operation, connect
V
SENSE
to V
OUT
. See Application Informa-
tion section for more detail.
No Connection.
Ground.
Regulated Output Voltage. Connect a low
ESR, 4.7
µF
or larger capacitor between
this pin and device GND.
PIN CONFIGURATION
Model
ADP3603AR
ADP3604AR
ADP3605AR-3
ADP3605AR
1
2
C
P
+
V
IN
NOTES
1
See individual data sheets for detailed ordering information.
2
SO = Small Outline package.
3
4
C
P
–
SD
Table II. Alternative Capacitor Technologies
T
ype
Aluminum
Electrolytic
Capacitor
Multilayer
Ceramic
Capacitor
Solid
Tantalum
Capacitor
OS-CON
Capacitor
Life
High
Freq
Temp
Size
Cost
5
V
SENSE
Fair
Fair
Fair
Small
Low
Long
Good
Poor
Fair
High
6
7
8
NC
GND
V
OUT
Above Avg
Above Avg
Avg
Good
Avg
Good
Avg
Good
Avg
Avg
Table III. Recommended Capacitor Manufacturers
C
P
+
1
8
V
OUT
Manufacturer
Sprague
Sprague
Nichicon
Mallory
TOKIN
MuRata
Capacitor
672D, 673D,
674D, 678D
675D, 173D,
199D
PF and PL
TDC and TDL
MLCC
GRM
Capacitor Type
Aluminum Electrolytic
Tantalum
Aluminum Electrolytic
Tantalum
Multilayer Ceramic
Multilayer Ceramic
7
GND
TOP VIEW
C
P
–
3
(Not to Scale)
6
NC
V
IN 2
ADP3607
SD
4
5
V
SENSE
NC = NO CONNECT
REV. 0
–3–
ADP3607 –Typical Performance Characteristics
270
4.00
OSCILLATOR FREQUENCY – kHz
SUPPLY CURRENT – mA
265
3.75
V
IN
= +5.0V
3.50
V
IN
= +4.0V
260
255
3.25
V
IN
= +3.0V
V
IN
= +3.3V
250
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE – Volts
5.0
3.00
–40
–15
10
35
TEMPERATURE – C
60
85
Figure 2. Oscillator Frequency vs. Supply Voltage
Figure 5. Supply Current vs. Temperature in Normal Mode
5.05
300
OSCILLATOR FREQUENCY – kHz
5.03
280
OUTPUT VOLTAGE – Volts
I
L
= 10mA
5.01
I
L
= 25mA
260
4.99
I
L
= 50mA
4.97
240
220
4.95
–40
–15
10
35
TEMPERATURE – C
60
85
200
–40
–15
10
35
TEMPERATURE – C
60
85
Figure 3. Output Voltage vs. Temperature
Figure 6. Oscillator Frequency vs. Temperature
125
5.05
5.00
AVERAGE INPUT CURRENT – mA
100
OUTPUT VOLTAGE – Volts
4.95
4.90
4.85
V
IN
= +3.3V
4.80
V
IN
= +3.0V
4.75
V
IN
= +5.0V
V
IN
= +4.0V
75
50
25
0
4.70
10
15
20
25
30
35
40
OUTPUT CURRENT – mA
45
50
0
25
50
75
125
100
LOAD CURRENT – mA
150
175
200
Figure 4. Average Input Current vs. Output Current
Figure 7. Output Voltage vs. Load Current
–4–
REV. 0
ADP3607
3.7
300
250
SUPPLY CURRENT – mA
FIXED VERSION
SUPPLY CURRENT –
A
3.6
200
FIXED VERSION
150
3.5
ADJUSTABLE VERSION
R = 38k
3.4
100
ADJUSTABLE VERSION
R = 38k
50
3.3
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE – Volts
5.0
0
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE – Volts
5.0
Figure 8. Supply Current vs. Supply Voltage in
Normal Mode
Figure 11. Supply Current vs. Supply Voltage in
Shutdown Mode
240
V
IN
= +5.0V
220
A
80
70
60
SUPPLY CURRENT –
EFFICIENCY – %
60
85
200
V
IN
= +4.0V
180
50
40
30
20
160
V
IN
= +3.3V
140
V
IN
= +3.0V
120
–40
–15
10
35
TEMPERATURE – C
10
0
0
10
20
30
LOAD CURRENT – mA
40
50
Figure 9. Supply Current vs. Temperature in
Shutdown Mode
Figure 12. Efficiency vs. Load Current Based on Circuit of
Figure 1
V
O
= +5.0V
V
OUT
V
O
= 0V
V
IN
= +3.3V
T
CH1 2.00V
CH2
2.00V M2.00ms CH2
V
IN
= 0V
1.12V
V
O
= +5.0V
V
OUT
V
O
= +4.96V
I
O
= 50mA
I
L
I
O
= 1mA
CH2
20.0mV
CH4 10.0mV
B
W
M4.00 s CH4
B
W
9.0mV
V
IN
Figure 10. Start-up Under Full Load Based on Circuit of
Figure 1
Figure 13. Load Transient Response Based on Circuit of
Figure 1
REV. 0
–5–
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