Analog Devices ADP3604 Datasheet
Switched Capacitor Voltage Converter
8
SPD
S1
SND
S2
S
N
D
B
S3
S
ND
7
3
V
IN
CP–
CP+
1
S4
2
V
OUT
GND
OSC
CLOCK
GEN
4
SD
FEEDBACK
CONTROL
LOOP
5
V
SENSE
1
2
3
4
8
7
6
5
TOP VIEW
(Not to Scale)
NC = NO CONNECT
ADP3604
CP+
V
SENSE
NC
V
OUT
V
IN
GND
C
P
–
SHUTDOWN
a
FEATURES
Fully Regulated Output
High Output Current: 120 mA
50 mA Version (ADP3603) Is Also Available
Outstanding Precision: 63% Output Accuracy
Input Voltage Range: +4.5 V to +6.0 V
Output Voltage: –3.0 V (Regulated)
High Switching Frequency: 120 kHz (240 kHz Internal
Oscillator)
Shutdown Capability
Small Outline 8-Pin SOIC Package
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
with Regulated Output
ADP3604*
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATION
8-Pin SOIC
(SO-8)
GENERAL DESCRIPTION
The ADP3604 switched capacitor voltage converter provides a
regulated output voltage with minimum voltage loss and requires a minimum number of external components. In addition, the ADP3604 does not require the use of an inductor.
The ADP3604 provides up to 120 mA of output current with
±3% output accuracy.
The internal oscillator runs at 240 kHz nominal frequency
which produces an output switching frequency of 120 kHz, allowing the use of small charge pump and filter capacitors.
The ADP3604 is primarily designed for use as a high frequency negative voltage regulator/inverter. The output voltages
of the ADP3604 can range from –1.2 V to –4.0 V, nominally
–3.0 V. For other output voltages, contact the factory.
The ADP3604 dissipates less than 350 mW of power and features fast shutdown mode capability (<5 ms) that also drops the
quiescent current to 1.5 mA (typ). For a lower cost, 50 mA output current version, see the ADP3603.
*Patent pending.
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.
V
VIN +4.5 – +6V
C1
†
4.7µF
OFF
ON
NOTE
C2: SPRAGUE, 293D105X0010B2W
C1, C3: TOKIN, 1E105ZY5UC205F
†
FOR BEST PERFORMANCE 10µF IS RECOMMENDED
4.7µF
0
SHUTDOWN
8
1
C2
†
ADP3604
3
4
2
–3.0V
OUT
7
5
V
SENSE
C3
4.7µF
†
Figure 1. Typical Application Circuit
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 Fax: 617/326-8703
ADP3604–SPECIFICA TIONS
WARNING!
ESD SENSITIVE DEVICE
(VIN = 5.0 V @ TA = +258C, CP = C
= 10 mF unless otherwise noted)
OUT
Parameter Symbol Condition Min Typ Max Units
OPERATING SUPPLY RANGE V
SUPPLY CURRENT I
S
S
–40°C < T
< +85°C34mA
A
4.5 5 6 V
2.9 3.5 mA
Shutdown Mode 1.5 2.5 mA
–40°C < TA < +85°C 1.6 3.0 mA
OUTPUT
Output Voltage V
Load Regulation ∆V
Output Resistance
Output Ripple Voltage
2
3
SWITCHING FREQUENCY F
O
V
O
V
O
V
O
R
O
V
RIPPLE
S
/ I
O
IO = 60 mA –3.1 –3.0 –2.91 V
IO = 10 mA to 120 mA, 4.5 V < VIN < 6 V –3.1 –3 –2.88 V
IO = 10 mA to 120 mA, 4.5 V < VIN < 6 V,
0°C < T
< +70°C –3.12 –3 –2.85 V
A
IO = 10 mA to 120 mA, 4.5 V < VIN < 6 V,
–40°C < T
IO = 10 mA–60 mA 0.9 mV/mA
O
= 10 mA–120 mA 1.5 mV/mA
I
O
< +85°C –3.2 –3 –2.8 V
A
8 Ω
C1–C3 = 10 µF, I
C1–C3 = 10 µF, I
= 80 mA 25 mV
LOAD
= 120 mA 55 mV
LOAD
100 120 135 kHz
–40°C < TA < +85°C 96 120 140 kHz
SHUTDOWN
Logic Input High V
Input Current I
Logic Input Low V
Input Current I
Turn-On-Time t
Turn-Off-Time t
NOTES
1
Capacitors C1 and C2 used in the test circuit are 10 µF with 0.1 Ω ESR. Capacitors with higher ESR may reduce output voltage and efficiency.
2
Open-loop output resistance.
3
See Figure 1 conditions.
All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
Specifications subject to change without notice
ABSOLUTE MAXIMUM RATINGS
(TA = +25°C unless otherwise noted)
Input Voltage (V+ to GND, GND to OUT) . . . . . . . . . +7.5 V
Output Short Circuit Protection . . . . . . . . . . . . . . . . . . . .1 sec
Power Dissipation, SO-8 . . . . . . . . . . . . . . . . . . . . . . .660 mW
2
θ
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C/W
JA
θ
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41°C/W
JC
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 and functional operation of the device at these or any
other conditions above those indicated in the operation section of this specification
is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
2
θJA is specified for worst case conditions with device soldered on a circuit board.
ORDERING GUIDE
Model Temperature Range Package Option*
ADP3604AR –40°C to +85°C SO-8
*SO = Small Outline Package.
IH
IH
IL
IL
ON
OFF
.
1
Figure 1, IL = 120 mA 5 ms
Figure 1, IL = 120 mA 5 ms
Pin Function
1C
+, Pump Capacitor Positive Input.
P
2 Ground.
3C
–, Pump Capacitor Negative Input.
P
4 Shutdown, Logic Level Shutdown Pin. Application of a
logic low to this pin will place the regulator in normal
operation. The device will be put into shutdown mode
with the shutdown pin pulled to V
mode the charge pump is turned off. Connect to ground
for normal operation.
5V
, Output Voltage Sense Line. This is used to im-
SENSE
prove load regulation performance by eliminating IR
drop on the output traces. See application section for
more detail. For normal operation, connect Pin 5 to
(Pin 7).
V
OUT
6 NC, No Internal Electrical Connection.
7V
Output Pin. Regulated negative output voltage.
OUT,
Connect a low ESR capacitor between this pin and device GND.
8V
Positive Supply Input when 4.5 V ≤ VIN ≤ 6 V.
IN,
Connect a low-ESR bypass capacitor between this pin
and the device ground pin.
2.4 V
1 µA
1 µA
PIN DESCRIPTION
. In Shutdown
IN
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 ADP3604 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.
–2–
0.4 V
REV. 0
ADP3604
TEMPERATURE – °C
OUTPUT VOLTAGE – V
–2.9
–3.04
–40 850
25
70
–2.92
–2.94
–2.96
–2.98
–3.00
–3.02
VIN = 5V
IL = 150mA
IL = 120mA
IL = 60mA
IL = 10mA
LOAD CURRENT – mA
EFFICIENCY –%
70
60
0
10 30 130
50 90 11070
50
40
30
20
10
VIN = 4.5V
VIN = 5.0V
VIN = 6.0V
100
90
10
0%
1V
2mS
0V 0V
130
120
OSCILLATOR FREQUENCY – kHz
110
4.0 4.5 8.0
5.0 5.5 6.0 6.5 7.0 7.5
SUPPLY VOLTAGE – V
Figure 2. Oscillator Frequency vs.
Supply Voltage
126
124
122
120
118
116
114
OSCILLATOR FREQUENCY – kHz
112
–40 8502570
TEMPERATURE – °C
VIN = 5V
3.5
3.0
2.5
2.0
1.5
1.0
SUPPLY CURRENT – mA
0.5
NORMAL MODE @ VIN = 5V
SHUTDOWN MODE @ VIN = 5V
0
–40 8502570
TEMPERATURE – °C
Figure 3. Supply Current vs.
Temperature
160
140
120
100
80
60
40
INPUT CURRENT – mA
20
0
10
30 50 70 90
LOAD CURRENT – mA
VIN = 5V
110 130 150
Figure 4. Output Voltage vs.
Temperature
Figure 5. Oscillator Frequency vs.
Temperature
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
SUPPLY CURRENT – mA
1.0
0.5
0
4.5 5.0 8.0
Figure 8. Supply Current vs. Supply
Voltage
REV. 0
NORMAL MODE
5.5 6.0 7.0 7.56.5
SUPPLY VOLTAGE – V
SHUTDOWN MODE
Figure 6. Average Input Current vs.
Load Current
1V
100
90
10
0%
2mS
0V0V
Figure 9. Start-Up Under Full Load
–3–
Figure 7. Efficiency vs. Load
Current and Input Voltage
Figure 10. Enable/Disable Time
Under Full Load
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