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UCC387

更新时间： 2024-11-22 22:59:31
品牌 Logo 应用领域
德州仪器 - TI 稳压器
页数 文件大小 规格书
8页 118K
描述
LOW-DROPOUT 200-mA LINEAR REGULATOR

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UCC387 数据手册

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SLUS377B - JULY 1999 - REVISED MAY 2000  
SOIC  
DP PACKAGES  
(TOP VIEW)  
D
Precision Positive Linear Voltage Regulator  
0.2 V Dropout at 200 mA  
D
D
Ensured Reverse Input/Output Voltage  
Isolation with Low Leakage  
VOUT  
GND  
GND  
VIN  
1
2
3
4
8
7
6
5
GND  
GND  
OFFB  
D
Adjustable Output Voltage (Down to 1.25 V)  
D
Load Independent Low Quiescent Current  
(10 A typical)  
VSENSE  
D
D
D
D
Load Regulation of 5 mV from 0 mA to  
200 mA  
TSSOP  
PW PACKAGES  
(TOP VIEW)  
Logic Shutdown Capability  
Shutdown Quiescent Current Below 2 A  
VIN  
N/C  
OFFB  
N/C  
1
2
3
4
8
7
6
5
Short Circuit Protection - Duty Cycle  
Limiting  
N/C  
VSENSE  
GND  
VOUT  
D
Remote Load Voltage Sense for Accurate  
Load Regulation  
description  
The UCC386/7/8 positive linear pass regulator series is tailored for low-dropout applications where extremely  
low quiescent power is required. Fabricated with BiCMOS technology ideally suited for low input to output  
differential applications, the UCC386/7/8 will pass 200 mA while requiring only 200 mV of input voltage  
headroom. Quiescent current is typically less than 10 µA. To prevent reverse current conduction, on-chip  
circuitry limits the minimum forward voltage to 50 mV typical. Once the forward voltage limit is reached, the  
input-output differential voltage is maintained as the input voltage drops until undervoltage lockout disables the  
regulator.  
block diagram and application circuit  
SWITCH CONTROL  
VOUT  
VIN  
LOAD  
1
8
7
6
5
+
+
–
GND  
GND  
GND  
GND  
OFFB  
2
3
+
1.25 V  
RS1  
RS2  
OVERCURRENT,  
HICCUP CONTROL  
& THERMAL  
SHUTDOWN  
R1  
R2  
VSENSE  
R1  
R2  
4
UCC386 1.025 m  
UCC387 1.875 m  
625 k  
625 k  
OPEN  
UCC388  
0
UCC388 ONLY  
FROM OPEN DRAIN  
SHUTDOWN COMMAND  
UDG-98087  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 2000, Texas Instruments Incorporated  
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
12345678

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