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ADP1147

更新时间： 2024-01-08 03:36:08
品牌 Logo 应用领域
亚德诺 - ADI 开关控制器
页数 文件大小 规格书
12页 199K
描述
High Efficiency Step-Down Switching Regulator Controllers

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ADP1147 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：DIP
包装说明：PLASTIC, DIP-8针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.8
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：CONSTANT OFF TIME最大输入电压：20 V
最小输入电压：3.5 V标称输入电压：10 V
JESD-30 代码：R-PDIP-T8JESD-609代码：e0
长度：9.88 mm功能数量：1
端子数量：8最高工作温度：70 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装形状：RECTANGULAR
封装形式：IN-LINE峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：5.33 mm
最大供电电流 (Isup)：2.3 mA表面贴装：NO
切换器配置：SINGLE最大切换频率：250 kHz
温度等级：COMMERCIAL端子面层：TIN LEAD
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：7.62 mmBase Number Matches：1

ADP1147 数据手册

 浏览型号ADP1147的Datasheet PDF文件第2页浏览型号ADP1147的Datasheet PDF文件第3页浏览型号ADP1147的Datasheet PDF文件第4页浏览型号ADP1147的Datasheet PDF文件第5页浏览型号ADP1147的Datasheet PDF文件第6页浏览型号ADP1147的Datasheet PDF文件第7页 
High Efficiency Step-Down  
Switching Regulator Controllers  
a
ADP1147-3.3/ADP1147-5  
FEATURES  
FUNCTIO NAL BLO CK D IAGRAM  
Greater Than 95% Efficiency  
Current Mode Sw itching Architecture Provides  
Superior Load and Line Transient Response  
Wide Input Voltage Range 3.5 V* to 16 V  
User Defined Current Lim it  
Short Circuit Protection  
Shutdow n Pin  
Low Dropout Voltage  
Low Standby Current 160 ␮A typ  
Low Cost  
Available in 8-Lead PDIP or 8-Lead SOIC  
V
P-DRIVE GROUND  
SENSE(+)  
SENSE(–)  
IN  
V
ADP1147  
2
R
B
S
Q
1
SLEEP  
Q
R
S
10mV to 150mV  
5pF  
C
V
OS  
V
V
TH1  
TH2  
S
13k⍀  
G
T
100k⍀  
1.25V  
APPLICATIONS  
Portable Com puters  
Modem s  
V
OFF-TIME  
CONTROL  
REFERENCE  
IN  
SENSE(–)  
Cellular Telephones  
Portable Equipm ent  
GPS System s  
C
I
SHUTDOWN  
T
TH  
A very low dropout voltage with excellent output regulation can  
be obtained by minimizing the dc resistance of the Inductor, the  
RSENSE resistor, and the RDS(ON) of the P-MOSFET . T he power  
savings mode conserves power by reducing switching losses at  
lower output currents. When the output load current falls below  
the minimum required for the continuous mode the ADP1147  
will automatically switch to the power savings mode. It will remain  
in this mode until the inductor requires additional current or the  
sleep mode is entered. In sleep mode with no load the standby  
power consumption of the device is reduced to 2.0 mW typical  
at VIN = 10 V.  
Handheld Instrum ents  
GENERAL D ESCRIP TIO N  
T he ADP1147 is part of a family of High Efficiency Step-Down  
Switching Regulators. T hese regulators offer superior load and  
line transient response, a user defined current limit and an  
automatic power savings mode. T he automatic power savings  
mode is used to maintain efficiency at lower output currents.  
T he ADP1147 incorporates a constant off-time, current mode  
switching architecture to drive an external P-channel MOSFET  
at frequencies up to 250 kHz. Constant off-time switching gen-  
erates a constant ripple current in the external inductor. T his  
results in a wider input voltage operating range of 3.5 V* to  
16 V, and a less complex circuit design.  
For designs requiring even greater efficiencies refer to the  
ADP1148 data sheet.  
*3.5 volt operation is for the ADP1147-3.3.  
100  
V
= 6 VOLTS  
IN  
L
*
R
SENSE**  
0.05⍀  
95  
90  
85  
80  
75  
70  
65  
60  
P-CHANNEL  
IRF7204  
50␮H  
V
(5.2V TO 12V)  
+
IN  
V
OUT  
+
5V/2A  
C
D1  
30BQ040  
IN  
1␮F  
V
= 10 VOLTS  
+
IN  
C
100␮F  
OUT  
390␮F  
V
IN  
0V = NORMAL  
1.5V = SHUTDOWN  
P-DRIVE  
ADP1147  
SHUTDOWN  
C
C
R
C
3300pF  
1k⍀  
I
TH  
SENSE(+)  
SENSE(–)  
1000pF  
C
T
C
T
GND  
470pF  
*COILTRONICS CTX 50–2MP  
**KRL SL-1-C1-0R050J  
1
10  
100  
LOAD CURRENT – mA  
1k  
10k  
SHUTDOWN  
Figure 1. High Efficiency Step-Down Converter  
(Typical Application)  
Figure 2. ADP1147-5 Typical Efficiency, Figure 1 Circuit  
REV. 0  
Inform ation furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assum ed by Analog Devices for its  
use, nor for any infringem ents of patents or other rights of third parties  
which m ay result from its use. No license is granted by im plication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.  
Tel: 781/ 329-4700  
Fax: 781/ 326-8703  
World Wide Web Site: http:/ / w w w .analog.com  
© Analog Devices, Inc., 1998  
1234567...12

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