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부품번호 | ADP3309 기능 |
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기능 | 100 mA Low Dropout Linear Regulator | ||
제조업체 | Analog Devices | ||
로고 | |||
전체 12 페이지수
FEATURES
±1.2% accuracy over line and load regulations @ 25°C
Ultralow dropout voltage: 120 mV typical @ 100 mA
Requires only COUT = 0.47 μF for stability
anyCAP LDOs are stable with all types of capacitors
(including MLCC)
Current and thermal limiting
Low noise
Low shutdown current: 1 μA
2.8 V to 12 V supply range
−20°C to +85°C ambient temperature range
Several fixed voltage options
Ultrasmall 5-lead SOT-23 package
Excellent line and load regulations
APPLICATIONS
Cellular telephones
Notebook, palmtop computers
Battery-powered systems
PCMCIA regulator
Bar code scanners
Camcorders, cameras
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
conventional LDOs with a novel architecture and an enhanced
process. Its patented design requires only a 0.47 μF output
capacitor for stability. This device is stable with any type of
capacitor regardless of its equivalent series resistance (ESR)
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
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 μA.
anyCAP® 100 mA
Low Dropout Linear Regulator
ADP3309
IN
ERR/NC
SD
FUNCTIONAL BLOCK DIAGRAM
Q1 ADP3309
THERMAL
PROTECTION
Q 2 DRIVER
CC
gm
BANDGAP
REF
OUT
R1
R2
GND
Figure 1.
The ADP3309 operates with a wide input voltage range from
2.8 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.
ERR/NC
VIN
C1 +
0.47µF –
4
ADP3309-3.3
1 IN
OUT 5
32
ON
OFF
+
–
VOUT = 3.3V
C2
0.47µF
SD GND
Figure 2. Typical Application Circuit
Rev. C
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
ADP3309
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Input Supply Voltage
Shutdown Input Voltage
Power Dissipation
Operating Ambient Temperature Range
Operating Junction Temperature Range
θJA
θJC
Storage Temperature Range
Lead Temperature (Soldering 10 sec)
Vapor Phase (60 sec)
Infrared (15 sec)
Rating
−0.3 V to +16 V
−0.3 V to +16 V
Internally Limited
−55°C to +125°C
−55°C to +125°C
190°C/W
92°C/W
−65°C to +150°C
300°C
215°C
220°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
Rev. C | Page 4 of 12
4페이지 120
96
72
48
24
0
0 25 50 75
OUTPUT LOAD (mA)
Figure 10. Dropout Voltage vs. Output Current
100
5
VOUT = 3.3V
RL = 33Ω
4
3
2
1
0
01 23 4321 0
INPUT VOLTAGE (V)
Figure 11. Power-Up/Power-Down
8
VSD = VIN
7 CL = 0.47µF
RL = 33Ω
6 VOUT = 3.3V
VIN
5
4
VOUT
3
2
1
0
0 20 40 60 80 100 120 140 160 180 200
TIME (µs)
Figure 12. Power-Up Overshoot
ADP3309
3.32
3.31
VOUT = 3.3V
3.30
3.29
3.28
RL = 33Ω
CL = 0.47µF
7.50
7.00
VIN
0 40 80 120 160 200 240 280 320 360 400
TIME (µs)
Figure 13. Line Transient Response
3.32
3.31
VOUT = 3.3V
3.30
3.29
RL = 3.3kΩ
3.28 CL = 0.47µF
7.50
7.00
VIN
0 20 40 60 80 100 120 140 160 180 200
TIME (µs)
Figure 14. Line Transient Response
3.32
3.31
VOUT = 3.3V
CL = 0.47µF
3.30
3.29
3.28
100
10
IOUT
0 100 200 300 400
TIME (µs)
Figure 15. Load Transient
500
Rev. C | Page 7 of 12
7페이지 | |||
구 성 | 총 12 페이지수 | ||
다운로드 | [ ADP3309.PDF 데이터시트 ] |
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부품번호 | 상세설명 및 기능 | 제조사 |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |