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ADP3302AR5 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADP3302AR5
Beschreibung High Precision anyCAP Dual Low Dropout Linear Regulator
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 8 Seiten
ADP3302AR5 Datasheet, Funktion
a
High Precision anyCAP™
Dual Low Dropout Linear Regulator
ADP3302
FEATURES
High Accuracy: ؎0.8%
Ultralow Dropout Voltage: 120 mV @ 100 mA Typical
Requires only CO = 0.47 F for Stability
anyCAP™ = Stable with All Types of Capacitors
Current and Thermal Limiting
Low Noise
Dropout Detector
Multiple Voltage Options
Thermally Enhanced SO-8 Package
APPLICATIONS
Cellular Telephones
Notebook and Palmtop Computers
Battery Powered Systems
Portable Instruments
High Efficiency Linear Regulators
FUNCTIONAL BLOCK DIAGRAM
(1/2 IS SHOWN)
IN
ERR
SD
Q2
Q1
THERMAL
PROTECTION
DRIVER
GND
ADP3302
CC
GM
BANDGAP
REF
OUT
R1
R2
GENERAL DESCRIPTION
The ADP3302 is a member of the ADP330X family of precision
micropower low dropout anyCAP™ regulators. The ADP3302
contains two fully independent 100 mA regulators with separate
shutdown and merged error outputs. It features 1.4% overall
output accuracy and very low, 120 mV typical, dropout voltage.
The ADP3302 has a wide input voltage range from ؉3 V to
؉12 V. It features an error flag that signals when either of the
two regulators is about to lose regulation. It has short circuit
current protection as well as thermal shutdown.
The ADP3302’s enhanced lead frame design allows for a maxi-
mum power dissipation of 630 mW @ +70°C ambient temperature
and 1.0 W at room temperature without any external heat sink.
anyCAP™ is a trademark of Analog Devices, Inc.
VIN
0.47µF
EOUT
5 IN
2
ERR
OUT1 1
8 IN
ADP3302
3 GND
OUT2 4
SD1
7
SD2
6
ON
OFF
330k
VOUT1
0.47µF
VOUT2
0.47µF
Figure 1. 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: 617/329-4700 World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1997






ADP3302AR5 Datasheet, Funktion
ADP3302–Typical Performance Characteristics
3.31
3.3
3.3k, 0.47µF LOAD
3.29
3.31
3.3
33, 0.47µF LOAD
3.29
7.5
VIN
7
0 40 80 120 160 200 240 280 320 360 400
TIME – µs
Figure 11. Line Transient Response—
(0.47 µF Load) on ADP3302AR4
3.31
3.3
3.3k, 10µF LOAD
3.29
3.31
3.3
33, 10µF LOAD
3.29
7.5
VIN
7
0 40 80 120 160 200 240 280 320 360 400
TIME – µs
Figure 12. Line Transient Response
(10 µF Load) on ADP3302AR4
3.302
3.3
VOUT1
3.298
5.03
CL = 10µF
5.01
5
VOUT2
4.99
4.97
100
0
0
I (VOUT2) 100mA
200 400 600 800 1000
TIME – µs
Figure 14. Load Transient on
VOUT2 and Crosstalk on VOUT1 on
ADP3302AR4 for 1 mA to 100 mA
Pulse
3.5 3.3V
0
400
300
200
100
0
0 12 3 45
TIME – sec
Figure 15. Short Circuit Current
3.305
3.3
3.295
VOUT1
CL = 0.47µF
5.002
5
4.998
100
0
0
VOUT2
I (VOUT1) 100mA
200 400
600
TIME – µs
800 1000
Figure 13. Load Transient on
VOUT1 and Crosstalk of VOUT2 on
ADP3302AR4 for 1 mA to 100 mA
Pulse
5
4 CL = 0.47µF
RL = 33
3
3.3V
2
CL = 4.7µF
1
0
5
0 3V
0 20 40 60 80 100 120 140 160 180 200
TIME – µs
Figure 16. Turn On ADP3302AR3
4
C = 0.47µF
R = 33ON 3.3V OUTPUT
3
2
VOUT
1
0
5
VSD
0
0 5 10 15 20 25 30 35 40 45 50
TIME – µs
Figure 17. Turn Off on ADP3302AR3
0
a. 0.47µF @ NO LOAD
–10 b. 0.47µF @ 33
c. 10µF @ NO LOAD
–20 d. 10µF @ 33
–30
b
–40
–50 d
–60
–70 b d
c
–80
–90
ac
–100
10 100
1k 10k 100k
FREQUENCY – Hz
1M
a
10M
Figure 18. Power Supply Ripple
Rejection on ADP3302AR3
0.8
c
a
0.6
0.47µF BYPASS
PIN 5, 8 TO PIN 3
0.4 b d
0.2 a. 0.47µF @ NO LOAD
b. 0.47µF @ 33
c. 10µF @ NO LOAD
d. 10µF @ 33
a
c
0
102
103 104
FREQUENCY = Hz
b
d
105
Figure 19. Output Noise Density on
ADP3302AR5
–6– REV. 0

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