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LTC1928-5

更新时间： 2023-12-20 18:44:55
品牌 Logo 应用领域
亚德诺 - ADI 泵稳压器
页数 文件大小 规格书
10页 312K
描述
采用 ThinSOT 封装并具低噪声线性稳压器的倍压器充电泵

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中文翻译

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LTC1928-5 数据手册

 浏览型号LTC1928-5的Datasheet PDF文件第2页浏览型号LTC1928-5的Datasheet PDF文件第3页浏览型号LTC1928-5的Datasheet PDF文件第4页浏览型号LTC1928-5的Datasheet PDF文件第5页浏览型号LTC1928-5的Datasheet PDF文件第6页浏览型号LTC1928-5的Datasheet PDF文件第7页 
LTC1928-5  
Doubler Charge Pump with  
Low Noise Linear Regulator  
in ThinSOT  
FEATURES  
DESCRIPTION  
The LTC®1928-5 isa doublerchargepump withaninternal  
low noise, low dropout (LDO) linear regulator. The part is  
designedtoprovidealownoiseboostedsupplyvoltagefor  
powering noise sensitive devices such as high frequency  
VCOs in wireless applications.  
n
Low Output Noise: 90µV  
Fixed Output Voltage: 5V  
(100kHz BW)  
RMS  
n
n
n
n
n
n
n
n
n
n
Input Voltage Range: 2.7V to 4.4V  
No Inductors Required  
Uses Small Ceramic Capacitors  
Output Current Up to 30mA  
550kHz Switching Frequency  
Low Operating Current: 190µA  
Low Shutdown Current: 4µA  
Internal Thermal Shutdown and Current Limiting  
Low Profile (1mm) ThinSOT™ Package  
An internal charge pump converts a 2.7V to 4.4V input to a  
boosted output, while the internal LDO regulator converts  
the boosted voltage to a low noise regulated output. The  
regulator is capable of supplying up to 30mA of output  
current. Shutdown reduces the supply current to <8µA,  
removes the load from V by disabling the regulator and  
IN  
discharges V  
to ground through a 200Ω switch.  
OUT  
APPLICATIONS  
The LTC1928-5 LDO regulator is stable with only 2µF on  
the output. Small ceramic capacitors can be used, reduc-  
ing PC board area.  
n
VCO Power Supplies for Cellular Phones  
n
2-Way Pagers  
n
Wireless PCMCIA Cards  
The LTC1928-5 is short-circuit and overtemperature pro-  
tected. The part is available in a 6-pin low profile (1mm)  
ThinSOT package.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
ThinSOT and Burst Mode are trademarks of Linear Technology Corporation. All other  
trademarks are the property of their respective owners.  
n
Portable Medical Instruments  
n
Low Power Data Acquisition  
n
Remote Transmitters  
n
White LED Drivers  
n
GaAs Switches  
TYPICAL APPLICATION  
Output Noise (BW = 10Hz to 2.5MHz)  
LTC1928-5  
5V  
3
4
2
V
1
5
6
IN  
V
V
V
OUT  
IN  
OUT  
2.7V TO 4.4V  
V
4.7µF  
OUT  
4.7µF  
CP  
CPO  
GND  
200µV/DIV  
4.7µF  
0.47µF  
CN/SHDN  
19285 F01  
Figure 1. Low Noise 5V Power Supply  
19285 TA01  
C
= C  
= 10mA  
= 3V  
= 5A  
= 25°C  
= 4.7µF 100µs/DIV  
OUT  
CPO  
OUT  
IN  
I
V
V
OUT  
T
A
19285fa  
1
For more information www.linear.com/LTC 1928-5  
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