參數(shù)資料
型號(hào)： LT1123CZ#TR
廠商： Linear Technology
文件頁(yè)數(shù)： 1/16頁(yè)
文件大小： 161K
描述： IC REG CTRLR SGL 5V TO-92-3
標(biāo)準(zhǔn)包裝： 2,000
類型： 正，固定式
輸出數(shù)： 1
輸出電壓： 5V
電流 - 電源： 700µA
工作溫度： 0°C ~ 125°C
封裝/外殼： TO-226-3、TO-92-3（TO-226AA）成形引線
供應(yīng)商設(shè)備封裝： TO-92-3
包裝： 帶卷 (TR)
1
LT1123
1123fb
Low Dropout
Regulator Driver
The LT
?/DIV>
1123 is a 3-pin bipolar device designed to be used
in conjunction with a discrete PNP power transistor to
form an inexpensive low dropout regulator. The LT1123
consists of a trimmed bandgap reference, error amplifier,
and a driver circuit capable of sinking up to 125mA from
the base of the external PNP pass transistor. The LT1123
is designed to provide a fixed output voltage of 5V.
The drive pin of the device can pull down to 2V at 125mA
(1.4V at 10mA). This allows a resistor to be used to reduce
the base drive available to the PNP and minimize the
power dissipation in the LT1123. The drive current of the
LT1123 is folded back as the feedback pin approaches
ground to further limit the available drive current under
short-circuit conditions.
Total quiescent current for the LT1123 is only 700礎(chǔ). The
device is available in a low cost TO-92 package.
?/DIV>
Extremely Low Dropout
?/DIV>
Low Cost
?/DIV>
Fixed 5V Output, Trimmed to ?%
?/DIV>
700礎(chǔ) Quiescent Current
?/DIV>
1mV Line Regulation
?/DIV>
5mV Load Regulation
?/DIV>
Thermal Limit
?/DIV>
4A Output Current Guaranteed
?/DIV>
Available in a 3-Pin TO-92 Package
5V Low Dropout Regulator
Dropout Voltage
FEATURES
DESCRIPTIO
TYPICAL APPLICATIO
620&
10礔*
SEALED
LEAD ACID
5.4 TO 7.2V
*REQUIRED IF DEVICE IS
  MORE THAN 6" FROM MAIN
  FILTER CAPACITOR
 
OUTPUT = 5V/4A
10礔
 
LT1123 TA01
20&
 
REQUIRED FOR STABILITY
  (LARGER VALUES INCREASE
  STABILITY)
MOTOROLA
MJE1123
DRIVE
LT1123
GND
FB
+
+
OUTPUT CURRENT (A)
0
0.3
0.4
0.5
4
LT1123 TA02
0.2
0.1
0
1
2
3
5
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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