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參數(shù)資料
| 型號： | LT1521CST-3 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | OCTAL BUS TRANSCEIVER/IOL=48mA O.C. 20-SOIC 0 to 70 |
| 中文描述： | 3 V FIXED POSITIVE LDO REGULATOR, 0.75 V DROPOUT, PDSO4 |
| 封裝： | PLASTIC, SOT-223, 4 PIN |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 294K |
| 代理商： | LT1521CST-3 |
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
相關PDF資料 |
PDF描述 |
|---|---|
| LT1521CST-3.3 | OCTAL BUS TRANSCEIVER/IOL=48mA O.C. 20-SOIC 0 to 70 |
| LT1521CST-5 | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| LT1521IS8-3 | OCTAL BUS TRANSCEIVER/IOL=48mA O.C. 20-PDIP 0 to 70 |
| LT1521IS8-3.3 | OCTAL BUS TRANSCEIVER/IOL=48mA O.C. 20-PDIP 0 to 70 |
| LT1521IS8-5 | OCTAL BUS TRANSCEIVER/IOL=48mA O.C. 20-SO 0 to 70 |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1521CST-3#PBF | 功能描述:IC REG LDO 3V .3A SOT223-3 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產(chǎn)品培訓模塊:More Information on LDOs 標準包裝:50 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 15V 電壓 - 壓降（標準）:1.1V @ 800mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:800mA 電流 - 限制（最小）:800mA 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-4，D²Pak（3 引線+接片），TO-263AA 供應商設備封裝:D2PAK-3 包裝:管件 |
| LT1521CST-3#TR | 功能描述:IC REG LDO 3V .3A SOT223-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產(chǎn)品培訓模塊:More Information on LDOs 標準包裝:50 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 15V 電壓 - 壓降（標準）:1.1V @ 800mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:800mA 電流 - 限制（最?。?800mA 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-4，D²Pak（3 引線+接片），TO-263AA 供應商設備封裝:D2PAK-3 包裝:管件 |
| LT1521CST-3#TRPBF | 功能描述:IC REG LDO 3V .3A SOT223-3 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 6.5V 電壓 - 壓降（標準）:0.125V @ 250mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:250mA（最小值） 電流 - 限制（最?。?300mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 供應商設備封裝:SOT-5 包裝:帶卷 (TR) |
| LT1521CST-3.3 | 功能描述:IC REG LDO 3.3V .3A SOT223-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產(chǎn)品培訓模塊:More Information on LDOs 標準包裝:50 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 15V 電壓 - 壓降（標準）:1.1V @ 800mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:800mA 電流 - 限制（最?。?800mA 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-4，D²Pak（3 引線+接片），TO-263AA 供應商設備封裝:D2PAK-3 包裝:管件 |
| LT1521CST-3.3#PBF | 功能描述:IC REG LDO 3.3V .3A SOT223-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，固定式 輸出電壓:8V 輸入電壓:10.5 V ~ 23 V 電壓 - 壓降（標準）:1.7V @ 40mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:100mA（最小值） 電流 - 限制（最小）:- 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SOIC 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1075 (CN2011-ZH PDF) 其它名稱:296-24390-1 |
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