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LTC1504

更新时间： 2024-02-13 10:57:02
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
12页 252K
描述
500mA Low Voltage Step-Down Synchronous Switching Regulator

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LTC1504 数据手册

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Final Electrical Specifications  
LTC1504  
500mA Low Voltage  
Step-Down Synchronous  
Switching Regulator  
U
DESCRIPTION  
FEATURES  
■
500mA Output Current at 3.3V Output  
The LTC®1504 is a self-contained, high efficiency syn-  
chronous buck switching regulator. It includes a pair of  
on-chip 1.5Ω power switches, enabling it to supply up to  
500mA of load current. Efficiency peaks at 92%, minimiz-  
ing heat and wasted power. The synchronous buck archi-  
tecture allows the output to source or sink current as  
required to keep the output voltage in regulation.  
■
Up to 92% Peak Efficiency  
■
Internal Reference Trimmed to 1%  
■
Output Can Source or Sink Current  
Requires as Few as Four External Components  
Input Voltage Range: 4V to 10V  
Adjustable Current Limit  
■
■
■
■
Small SO-8 Package  
The LTC1504 is available in adjustable and fixed 3.3V  
output versions. An adjustable current limit circuit pro-  
vides protection from overloads. The internal 1% refer-  
encecombinedwithasophisticatedvoltagefeedbackloop  
provides optimum output voltage accuracy and fast load  
transient response. The LTC1504 is specified to operate  
with input voltages between 4V and 10V. Contact the LTC  
factory for guaranteed specifications at 2.7V supply.  
■
200kHz Switching Frequency Can be  
Synchronized Up to 500kHz  
U
APPLICATIONS  
■
Small Portable Digital Systems  
Daisy-Chained Control Outputs  
■
■
■
Active Termination  
Auxiliary Output Voltage Supplies  
Minimum Part Count/Size Switchers  
The LTC1504 is available in a plastic SO-8 package.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
Minimum Part Count 5V to 3.3V Regulator  
5V to 3.3V Efficiency  
100  
NC SHUTDOWN  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
I
SHDN  
MAX  
L
EXT  
3.3V AT 500mA  
5V  
V
CC  
SW  
+
LTC1504-3.3  
C
IN  
GND  
SS  
SENSE  
COMP  
+
C
OUT  
NC  
1000pF  
C
C
EXT  
: AVX TPSC226M016R0375  
IN  
OUT  
: AVX TAJC476M010  
L
: COILTRONICS CTX50-1P  
1504 • TA01  
10  
100  
500  
LOAD CURRENT (mA)  
1504 • TA02  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
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