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PDF ADP3338 Data sheet ( Hoja de datos )
| Número de pieza | ADP3338 | |
| Descripción | High-Accuracy Ultralow IQ/ 1 A/ anyCAP Low Dropout Regulator | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ADP3338 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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a High-Accuracy Ultralow IQ, 1 A, anyCAP®
Low Dropout Regulator
FEATURES
High Accuracy Over Line and Load: ؎0.8% @ 25؇C,
؎1.4% Over Temperature
Ultralow Dropout Voltage: 190 mV (Typ) @ 1 A
Requires Only CO = 1 F for Stability
anyCAP = Stable with Any Type of Capacitor
(Including MLCC)
Current and Thermal Limiting
Low Noise
2.7 V to 8 V Supply Range
–40؇C to +85؇C Ambient Temperature Range
SOT-223 Package
APPLICATIONS
Notebook, Palmtop Computers
SCSI Terminators
Battery-Powered Systems
Bar Code Scanners
Camcorders, Cameras
Home Entertainment Systems
Networking Systems
DSP/ASIC Supply
ADP3338
FUNCTIONAL BLOCK DIAGRAM
IN Q1
THERMAL
PROTECTION
CC
ADP3338
OUT
R1
DRIVER
gm
BANDGAP
REF
R2
GND
GENERAL DESCRIPTION
The ADP3338 is a member of the ADP33xx family of precision
low dropout anyCAP voltage regulators. The ADP3338 oper-
ates with an input voltage range of 2.7 V to 8 V and delivers a
load current up to 1 A. The ADP3338 stands out from the
conventional LDOs with a novel architecture and an enhanced
process that enables it to offer performance advantages and
higher output current than its competition. Its patented design
requires only a 1 µF output capacitor for stability. This device
is insensitive to output capacitor Equivalent Series Resistance
(ESR), and is stable with any good quality capacitor, including
ceramic (MLCC) types for space-restricted applications. The
ADP3338 achieves exceptional accuracy of ± 0.8% at room
temperature and ± 1.4% over temperature, line and load varia-
tions. The dropout voltage of the ADP3338 is only 190 mV
(typical) at 1 A. This device also includes a safety current limit
and thermal overload protection. The ADP3338 has ultralow
quiescent current 110 µA (typical) in light load situations.
VIN
1F
ADP3338
IN OUT
GND
VOUT
1F
Figure 1. Typical Application Circuit
anyCAP is a registered trademark of Analog Devices Inc.
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 that
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
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001
1 page  
2.51
2.50
2.49
VOUT = 2.5V
COUT = 10F
RLOAD = 2.5⍀
4.5
3.5
80 120 140 180
TIME – s
TPC 10. Line Transient Response
T
2.6
2.5
2.4
VIN = 6V
COUT = 1F
RLOAD = 2.5⍀
1
0
200 300 600 800
TIME – s
TPC 11. Load Transient Response
ADP3338
T
2.6
2.5
2.4
VIN = 6V
COUT = 10F
1
0
200 400 600
TIME – s
800
TPC 12. Load Transient Response
2.5
0.0
400m⍀
SHORT
FULL SHORT
1.5
VIN = 6V
1.0
0.5
0.0
0.4 0.6 0.8
TIME – s
1
TPC 13. Short-Circuit Current
0
VOUT = 2.5V
–10
–20 CL = 1F
IL = 1A
–30 CL = 10F
–40 IL = 1A
–50
–60
–70
–80
–90
CL = 1F
IL = 0
CL = 10F
IL = 0
10 100 1k 10k 100k 1M
FREQUENCY – Hz
TPC 14. Power Supply Ripple
Rejection
300
250
200
150
100 IL = 1A
50
IL = 0A
0
0 10 20 30 40 50
CL – F
TPC 15. RMS Noise vs. CL
(10 Hz–100 kHz)
100
10
CL = 1F
1
0.1
CL = 10F
0.01
0.001
10
100 1k 10k 100k
FREQUENCY – Hz
1M
TPC 16. Output Noise Density
REV. 0
–5–
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ADP3338.PDF ] | |
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