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參數(shù)資料
| 型號： | LT1962EMS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 300mA, Low Noise, Micropower LDO Regulators |
| 中文描述： | 1.22 V-20 V ADJUSTABLE POSITIVE LDO REGULATOR, 0.43 V DROPOUT, PDSO8 |
| 封裝： | PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 8/8頁 |
| 文件大?。?/td> | 138K |
| 代理商： | LT1962EMS8 |
8
LT1962 Series
flow to less than 40
μ
A. For adjustable versions, the output
will act like an open circuit; no current will flow out of the
pin. If the input is powered by a voltage source, the output
will source the short-circuit current of the device and will
protect itself by thermal limiting. In this case, grounding
the SHDN pin will turn off the device and stop the output
from sourcing the short-circuit current.
The ADJ pin of the adjustable device can be pulled above
or below ground by as much as 7V without damaging the
device. If the input is left open circuit or grounded, the ADJ
pin will act like an open circuit when pulled below ground
and like a large resistor (typically 100k) in series with a
diode when pulled above ground.
In situations where the ADJ pin is connected to a resistor
divider that would pull the ADJ pin above its 7V clamp
voltage if the output is pulled high, the ADJ pin input
current must be limited to less than 5mA. For example, a
resistor divider is used to provide a regulated 1.5V output
from the 1.22V reference when the output is forced to 20V.
The top resistor of the resistor divider must be chosen to
limit the current into the ADJ pin to less than 5mA when the
ADJ pin is at 7V. The 13V difference between OUT and ADJ
pin divided by the 5mA maximum current into the ADJ pin
yields a minimum top resistor value of 2.6k.
In circuits where a backup battery is required, several
different input/output conditions can occur. The output
voltage may be held up while the input is either pulled to
ground, pulled to some intermediate voltage or is left open
circuit. Current flow back into the output will follow the
curve shown in Figure 6.
When the IN pin of the LT1962 is forced below the OUT pin
or the OUT pin is pulled above the IN pin, input current will
typically drop to less than 2
μ
A. This can happen if the input
of the device is connected to a discharged (low voltage)
battery and the output is held up by either a backup battery
or a second regulator circuit. The state of the SHDN pin will
have no effect on the reverse output current when the
output is pulled above the input.
Figure 6. Reverse Output Current
1962i LT/TP 0400 4K PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2000
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
G
FAX: (408) 434-0507
G
www.linear-tech.com
RELATED PARTS
PART NUMBER
LT1120
LT1121
LT1129
LT1175
LT1521
LT1529
LTC1627
LT1761
LT1762
LT1763
LT1764
LT1772
LT1963
DESCRIPTION
125mA Low Dropout Regulator with 20
μ
A I
Q
150mA Micropower Low Dropout Regulator
700mA Micropower Low Dropout Regulator
500mA Negative Low Dropout Micropower Regulator
300mA Low Dropout Micropower Regulator with Shutdown
3A Low Dropout Regulator with 50
μ
A I
Q
High Efficiency Synchronous Step-Down Switching Regulator
100mA, Low Noise, Low Dropout Micropower Regulator in SOT-23
150mA, Low Noise, LDO Micropower Regulator
500mA, Low Noise, LDO Micropower Regulator
3A, Fast Transient Response Low Dropout Regulator
Constant Frequency Current Mode Step-Down DC/DC Controller
1.5A, Fast Transient Response Low Dropout Regulator
COMMENTS
Includes 2.5V Reference and Comparator
30
μ
A I
Q
, SOT-223 Package
50
μ
A Quiescent Current
45
μ
A I
Q
, 0.26V Dropout Voltage, SOT-223 Package
15
μ
A I
Q
, Reverse Battery Protection
500mV Dropout Voltage
Burst Mode
TM
Operation, Monolithic, 100% Duty Cycle
20
μ
A Quiescent Current, 20
μ
V
RMS
Noise
25
μ
A Quiescent Current, 20
μ
V
RMS
Noise
30
μ
A Quiescent Current, 20
μ
V
RMS
Noise
340mV Dropout Voltage
Up to 94% Efficiency, SOT-23 Package, 100% Duty Cycle
SO-8, SOT-223 Packages
Burst Mode is a trademark of Linear Technology Corporation.
APPLICATIOU
W
U
U
OUTPUT VOLTAGE (V)
0
1
R
μ
A
30
40
50
60
70
80
90
100
8
9
7
1962 F06
20
10
0
2
3
4
6
5
10
LT1962
LT1962-2.5
LT1962-3
LT1962-3.3
LT1962-5
T
J
= 25
°
C
V
= 0V
CURRENT FLOWS
INTO OUTPUT PIN
V
OUT
= V
ADJ
(LT1962)
相關PDF資料 |
PDF描述 |
|---|---|
| LT1962EMS8-2.5 | 300mA, Low Noise, Micropower LDO Regulators |
| LT1962 | 300mA, Low Noise, Micropower LDO Regulators |
| LT1962EMS8-5 | 300mA, Low Noise, Micropower LDO Regulators |
| LT1962EMS8-3.3 | 300mA, Low Noise, Micropower LDO Regulators |
| LT1963AEST-1.5 | 1.5A, Low Noise, Fast Transient Response LDO Regulators |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1962EMS8#PBF | 功能描述:IC REG LDO ADJ .3A 8-MSOP 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:MIC5365/66 Ultra-small LDO Regulators 標準包裝:1 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:3V 輸入電壓:最高 5.5V 電壓 - 壓降（標準）:0.155V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最小）:200mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:4-UDFN 裸露焊盤，4-TMLF? 供應商設備封裝:4-TMLF?（1x1） 包裝:Digi-Reel® 其它名稱:576-3192-6 |
| LT1962EMS8#PBF | 制造商:Linear Technology 功能描述:Linear Voltage Regulator IC 制造商:Linear Technology 功能描述:IC, ADJ LDO REG 1.22V TO 20V 0.3A MSOP-8 |
| LT1962EMS8#TR | 功能描述:IC REG LDO ADJ .3A 8-MSOP 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)壓器拓撲結構: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 |
| LT1962EMS8#TRPBF | 功能描述:IC REG LDO ADJ .3A 8-MSOP 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)壓器拓撲結構: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 |
| LT1962EMS8-1.5 | 功能描述:IC REG LDO 1.5V .3A 8MSOP 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)壓器拓撲結構: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 |
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