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| 型号： | ADP123-EVALZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION ADJUSTABLE V |
| 标准包装： | 1 |
| 每 IC 通道数： | 1 - 单 |
| 输出电压： | 0.8 ~ 5 V |
| 电流 - 输出： | 350mA |
| 输入电压： | 2.3 ~ 5.5 V |
| 稳压器类型： | 正，可调式 |
| 工作温度： | -40°C ~ 85°C |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ADP123 |
5.5 V Input, 300 mA, Low Quiescent
Current, CMOS Linear Regulator
Data Sheet
FEATURES
TYPICAL APPLICATION CIRCUITS
Input voltage supply range: 2.3 V to 5.5 V
V IN = 2.3V TO 5.5V
V OUT = 1.8V
300 mA maximum output current
Fixed and adjustable output voltage versions
C IN
1μF
1
VIN VOUT
ADP122
5
C OUT
1μF
Very low dropout voltage: 85 mV at 300 mA load
2
GND
Low quiescent current: 45 μA at no load
Low shutdown current: <1 μA
Initial accuracy: ±1% accuracy
OFF
ON
3
EN
NC
4
Up to 31 fixed-output voltage options available from
Figure 1. ADP122 with Fixed Output Voltage (TSOT Version)
1.75 V to 3.3 V
Adjustable-output voltage range
V IN = 2.3V TO 5.5V
1
VIN
VOUT
5
V OUT = 0.5V(1 + R1/R2)
0.8 V to 5.0 V (ADP123)
Excellent PSRR performance: 60 dB at 100 kHz
C IN
1μF
2
ADP123
GND
R1
C OUT
1μF
Excellent load/line transient response
Optimized for small 1.0 μF ceramic capacitors
ON
3
EN
ADJ
4
Current limit and thermal overload protection
Logic controlled enable
OFF
R2
Compact packages: 5-lead TSOT and 6-lead 2 mm × 2 mm LFCSP
APPLICATIONS
Digital camera and audio devices
Portable and battery-powered equipment
Figure 2. ADP123 with Adjustable Output Voltage (TSOT Version)
VOUT = 1.8V 1 6 VIN = 2.3V TO 5.5V
VOUT VIN
C2 C1
1μF 1μF
GND 2 NC NC 5 GND
Automatic meter reading (AMR) meters
GPS and location management units
3
GND
EN
4
ON
OFF
Medical instrumentation
GND
ADP122
Point-of-sale equipment
GENERAL DESCRIPTION
The ADP122/ADP123 are low quiescent current, low dropout
TOP VIEW
(Not to Scale)
NC = NOT CONNECT. THIS PIN CAN BE LEFT FLOATING
OR CONNECTED TO GROUND.
Figure 3. ADP122 with Fixed Output Voltage (LFCSP Version)
1μF
4
linear regulators. They are designed to operate from an input
voltage between 2.3 V and 5.5 V and to provide up to 300 mA of
output current. The low 85 mV dropout voltage at a 300 mA load
improves efficiency and allows operation over a wide input
voltage range.
VOUT = 0.5V (1 + R1/R2) 1
C2
R1
2
GND
R2
3
GND
VOUT
ADJ
GND
VIN
NC
EN
6 VIN = 2.3V TO 5.5V
C1
1μF
5 GND
ON
OFF
The low 170 μA of quiescent current at full load makes the ADP122
ideal for battery-operated portable equipment.
GND
ADP123
TOP VIEW
(Not to Scale)
The ADP122 is capable of 31 fixed output voltages from 1.75 V
to 3.3 V. The ADP123 is the adjustable version of the device and
allows the output voltage to be set between 0.8 V and 5.0 V by
an external voltage divider.
The ADP122/ADP123 are specifically designed for stable operation
with tiny 1 μF ceramic input and output capacitors to meet the
requirements of high performance, space constrained applications.
NC = NOT CONNECT. THIS PIN CAN BE LEFT FLOATING
OR CONNECTED TO GROUND.
Figure 4. ADP123 with Adjustable Output Voltage (LFCSP Version)
The ADP122/ADP123 have an internal soft start that gives a
constant start-up time of 350 μs. Short-circuit protection and
thermal overload protection circuits prevent damage in adverse
conditions. The ADP122/ADP123 are available in a tiny, 5-lead
TSOT package and 6-lead LFCSP package for the smallest
footprint solution to meet a variety of portable applications.
Rev. E
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.
Trademarks and registered trademarks are the property of their respective owners.
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 ?2009–2012 Analog Devices, Inc. All rights reserved.
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