ADP3309ART-33 AD [Analog Devices], ADP3309ART-33 Datasheet

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ADP3309ART-33

Manufacturer Part Number
ADP3309ART-33
Description
Manufacturer
AD [Analog Devices]
Datasheet
a
anyCAP is a 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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
GENERAL DESCRIPTION
The ADP3309 is a member of the ADP330x family of precision
low dropout anyCAP voltage regulators. It is pin-for-pin and
functionally compatible with National’s LP2981, but offers
performance advantages. The ADP3309 stands out from con-
ventional LDOs with a novel architecture and an enhanced
process. Its patented design requires only a 0.47 F output
capacitor for stability. This device is stable with any type of
capacitor regardless of its ESR (Equivalent Series Resistance)
value, including ceramic types for space restricted applications.
The ADP3309 achieves 1.2% accuracy at room temperature
and 2.2% overall accuracy over temperature, line and load
regulations. The dropout voltage of the ADP3309 is only
FEATURES
Ultralow Dropout Voltage: 120 mV Typical @ 100 mA
Requires Only C
anyCAP = Stable with All Types of Capacitors
Current and Thermal Limiting
Low Noise
Low Shutdown Current: 1 A
3.0 V to 12 V Supply Range
–20 C to +85 C Ambient Temperature Range
Several Fixed Voltage Options
Ultrasmall SOT-23-5 Package
Excellent Line and Load Regulations
APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery Powered Systems
PCMCIA Regulator
Bar Code Scanners
Camcorders, Cameras
1.2% Accuracy Over Line and Load Regulations @ +25 C
(Including MLCC)
O
= 0.47 F for Stability
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
120 mV (typical) at 100 mA. This device also includes a current
limit and a shutdown feature. In shutdown mode, the ground
current is reduced to ~1 A.
The ADP3309 operates with a wide input voltage range from
3.0 V to 12 V and delivers a load current in excess of 100 mA.
The ADP3309 anyCAP LDO offers a wide range of output
voltages. For a 50 mA version, refer to the ADP3308 data sheet.
ERR/NC
Low Dropout Linear Regulator
SD
IN
Q2
V
IN
0.47 F
Figure 1. Typical Application Circuit
FUNCTIONAL BLOCK DIAGRAM
ERR/NC
C1
PROTECTION
+
THERMAL
World Wide Web Site: http://www.analog.com
ADP3309-3.3
IN
SD
OFF
anyCAP™ 100 mA
ON
DRIVER
OUT
GND
GND
Q1
+
© Analog Devices, Inc., 1998
C2
0.47 F
ADP3309
CC
BANDGAP
G
V
ADP3309
OUT
M
REF
= +3.3V
R2
R1
OUT

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ADP3309ART-33 Summary of contents

Page 1

FEATURES 1.2% Accuracy Over Line and Load Regulations @ +25 C Ultralow Dropout Voltage: 120 mV Typical @ 100 mA Requires Only C = 0.47 F for Stability O anyCAP = Stable with All Types of Capacitors (Including MLCC) ...

Page 2

ADP3309-xx–SPECIFICATIONS Parameter OUTPUT VOLTAGE ACCURACY LINE REGULATION LOAD REGULATION GROUND CURRENT GROUND CURRENT IN DROPOUT DROPOUT VOLTAGE SHUTDOWN THRESHOLD SHUTDOWN PIN INPUT CURRENT GROUND CURRENT IN SHUTDOWN I MODE OUTPUT CURRENT IN SHUTDOWN MODE ERROR PIN OUTPUT LEAKAGE ERROR PIN ...

Page 3

... ORDERING GUIDE Voltage Model Output ADP3309ART-2.7 2.7 V ADP3309ART-2.85 2.85 V ADP3309ART-2.9 2.9 V ADP3309ART-3 3.0 V ADP3309ART-3.3 3.3 V ADP3309ART-3.6 3.6 V *SOT = Surface Mount. Contact the factory for the availability of other output voltage options. Other Member of anyCAP Family Model Output Current ADP3308 50 mA NOTES 1 See individual data sheet for detailed ordering information. ...

Page 4

ADP3309 –Typical Performance Characteristics 3.302 I = 0mA V = +3.3V L OUT 3.301 I = 10mA L 3.300 3.299 I = 50mA 3.298 L 3.297 3.296 I = 100mA L 3.295 3 ...

Page 5

V = +3.3V OUT 3.310 3.300 3.290 3.280 7.5 7 120 160 200 240 280 320 360 400 TIME – s Figure 11. Line Transient ...

Page 6

ADP3309 THEORY OF OPERATION The ADP3309 anyCAP LDO uses a single control loop for regulation and reference functions. The output voltage is sensed by a resistive voltage divider consisting of R1 and R2, which is varied to provide the available ...

Page 7

The following general guidelines will be helpful when designing a board layout board traces with larger cross section areas will remove more heat. For optimum results, use PC boards with thicker copper and or wider traces. 2. Increase ...

Page 8

ADP3309 0.0669 (1.70) 0.0590 (1.50) 0.0512 (1.30) 0.0354 (0.90) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 5-Lead Surface Mount Package (SOT-23) 0.1181 (3.00) 0.1102 (2.80 0.1181 (3.00) 0.1024 (2.60 PIN 1 0.0374 (0.95) BSC ...

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