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參數(shù)資料
| 型號(hào)： | LT1521 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| 中文描述： | 無電容，NMOS管，150mA的低壓差穩(wěn)壓器的反向電流保護(hù) |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 248K |
| 代理商： | LT1521 |
1
LT1521/LT1521-3
LT1521-3.3/LT1521-5
300mA Low Dropout
Regulators with Micropower
Quiescent Current and Shutdown
The LT
1521/LT1521-3/LT1521-3.3/LT1521-5 are low
dropout regulators with micropower quiescent current
and shutdown. These devices are capable of supplying
300mA of output current with a dropout voltage of 0.5V.
Designed for use in battery-powered systems, the low
quiescent current, 12
μ
A operating and 6
μ
A in
shutdown, makes them an ideal choice. The quiescent
current is well controlled; it does not rise in dropout as it
does with many other low dropout PNP regulators.
Other features of the LT1521/LT1521-3/LT1521-3.3/
LT1521-5 include the ability to operate with very small
output capacitors. They are stable with only 1.5
μ
F on the
output while most older devices require between 10
μ
F and
100
μ
F for stability. Small ceramic capacitors can be used,
enhancing manufacturability. Also, the input may be con-
nected to voltages lower than the output voltage, including
negative voltages, without reverse current flow from out-
put to input. This makes the LT1521 series ideal for backup
power situations where the output is held high and the
input is low or reversed. Under these conditions only 5
μ
A
will flow from the output pin to ground.
FEATURES
DESCRIPTIO
N
U
TYPICAL APPLICATIO
N
U
5V Battery-Powered Supply with Shutdown
Dropout Voltage
I
Dropout Voltage: 0.5V
I
Output Current: 300mA
I
Quiescent Current: 12
μ
A
I
No Protection Diodes Needed
I
Adjustable Output from 3.8V to 20V
I
Fixed Output Voltages: 3V, 3.3V, 5V
I
Controlled Quiescent Current in Dropout
I
Shutdown I
Q
= 6
μ
A
I
Reverse Battery Protection
I
No Reverse Current
I
Thermal Limiting
OUTPUT CURRENT (mA)
0
0
D
0.1
0.2
0.3
0.4
0.6
50
100
150
200
LT1521 TA02
250
300
0.5
8
5
1
2
3
+
6V
1.5
μ
F
1
μ
F
5V
300mA
V
SHDN
(PIN 5) OUTPUT
<0.25
>2.80
NC
OFF
ON
ON
LT1521-5
GND
IN
SHDN
OUT
SENSE
LT1521 TA01
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO
S
U
I
Low Current Regulator
I
Regulator for Battery-Powered Systems
I
Post Regulator for Switching Supplies
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT-1521-110-024 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1521-111-006 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1521-115-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1521-151-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1521-151-012/384-17131 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
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