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參數(shù)資料
| 型號： | L1581D-3.3 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Dual Input Ultra Low Dropout Voltage Regulator (ULDO) |
| 中文描述： | 雙路輸入超低壓差穩(wěn)壓器（ULDO） |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 116K |
| 代理商： | L1581D-3.3 |
GENERAL DESCRIPTION
1
Dual Input Ultra Low Dropout
Voltage Regulator (ULDO)
L1581 Series
TO-252
OCT-11-Y02
NIKO-SEM
The L1581 is a positive and very low
dropout voltage regulator with 5A output
current capability. When supplying 2.5V or
2.8V on Motherboards or VGA Card where
both 5V and 3.3V supplies are available,
the superior dropout characteristics of the
L1581 result in reduced heat dissipation
compared to regular LDOs, thus allowing
heat sink reduction. The adjustable version
requires only two external resistors to set
the output. The L1581 features a low
dropout of less than 600mV and offers fast
transient response, remote sense, internal
limiting,
thermal
shutdown
operating area protection of the output
device.
The L1581 is a five terminal adjustable
voltage regulator available in the popular 5
pin TO-252 packages.
and
safe
FEATURES
z
Low dropout voltage 600mV at rated load
current
z
Remote sense operation
z
Fast transient response
z
0.5% voltage reference initial accuracy
z
Standard 5 terminal, Low cost TO-252
packages
APPLICATIONS
z
3.3V to 2.8V or 2.5V for Motherboards or
VGA Card
z
Spilt plane microprocessor supplies
z
Post regulator for switching supplies
TYPICAL APPLICATION
Adjustable Output Parts
(2)
Vin
C3
0.033uF
Vout
Iadj
Vo = Vref (1+R2/R1) + Iadj x R2
330uF
C4
L1581X
3
5
4
2
1
OUT
Vin
CTR'L
A
SENSE
R2
C2
10uF
R1
C1
330uF
Vctrl
Vref
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