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| 型號(hào)： | LT1962-1.5 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 300mA, Low Noise, Micropower LDO Regulators(1.5V輸出,300mA, 低噪聲,微功耗,低壓差輸出穩(wěn)壓器) |
| 中文描述： | 300mA的，低噪聲，微功耗LDO穩(wěn)壓器（1.5V的輸出，為300mA，低噪聲，微功耗，低壓差輸出穩(wěn)壓器） |
| 文件頁(yè)數(shù)： | 11/16頁(yè) |
| 文件大?。?/td> | 234K |
| 代理商： | LT1962-1.5 |
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11
LT1962 Series
Figure 1. Kelvin Sense Connection
IN
SHDN
1962 F01
R
P
OUT
V
IN
SENSE
GND
LT1962
R
P
4
2
1
5
8
+
+
LOAD
PIU
pin. The ADJ pin voltage is 1.22V referenced to ground and
the output voltage range is 1.22V to 20V.
BYP (Pin 3):
Bypass. The BYP pin is used to bypass the
reference of the LT1962 to achieve low noise performance
from the regulator. The BYP pin is clamped internally to
±
0.6V (one V
BE
). A small capacitor from the output to this
pin will bypass the reference to lower the output voltage
noise. A maximum value of 0.01
μ
F can be used for
reducing output voltage noise to a typical 20
μ
V
RMS
over a
10Hz to 100kHz bandwidth. If not used, this pin must be
left unconnected.
GND (Pin 4):
Ground.
SHDN (Pin 5):
Shutdown. The SHDN pin is used to put the
LT1962 regulators into a low power shutdown state. The
output will be off when the SHDN pin is pulled low. The
SHDN pin can be driven either by 5V logic or open-
collector logic with a pull-up resistor. The pull-up resistor
is required to supply the pull-up current of the open-
collector gate, normally several microamperes, and the
SHDN pin current, typically 1
μ
A. If unused, the SHDN pin
must be connected to V
IN
. The device will not function if
the SHDN pin is not connected.
NC (Pins 6, 7):
No Connect. These pins are not internally
connected. For improved power handling capabilities,
these pins can be connected to the PC board.
IN (Pin 8):
Input. Power is supplied to the device through
the IN pin. A bypass capacitor is required on this pin if the
device is more than six inches away from the main input
filter capacitor. In general, the output impedance of a
battery rises with frequency, so it is advisable to include a
bypass capacitor in battery-powered circuits. A bypass
capacitor in the range of 1
μ
F to 10
μ
F is sufficient. The
LT1962 regulators are designed to withstand reverse
voltages on the IN pin with respect to ground and the OUT
pin. In the case of a reverse input, which can happen if a
battery is plugged in backwards, the device will act as if
there is a diode in series with its input. There will be no
reverse current flow into the regulator and no reverse
voltage will appear at the load. The device will protect both
itself and the load.
APPLICATIOU
The LT1962 series are 300mA low dropout regulators with
micropower quiescent current and shutdown. The devices
are capable of supplying 300mA at a dropout voltage of
300mV. Output voltage noise can be lowered to 20
μ
V
RMS
over a 10Hz to 100kHz bandwidth with the addition of a
0.01
μ
F reference bypass capacitor. Additionally, the refer-
ence bypass capacitor will improve transient response of
the regulator, lowering the settling time for transient load
conditions. The low operating quiescent current (30
μ
A)
drops to less than 1
μ
A in shutdown. In addition to the low
quiescent current, the LT1962 regulators incorporate sev-
eral protection features which make them ideal for use in
battery-powered systems. The devices are protected
against both reverse input and reverse output voltages. In
battery backup applications where the output can be held
W
U
U
up by a backup battery when the input is pulled to ground,
the LT1962-X acts like it has a diode in series with its
output and prevents reverse current flow. Additionally, in
dual supply applications where the regulator load is re-
turned to a negative supply, the output can be pulled below
ground by as much as 20V and still allow the device to start
and operate.
Adjustable Operation
The adjustable version of the LT1962 has an output
voltage range of 1.22V to 20V. The output voltage is set by
the ratio of two external resistors as shown in Figure 2. The
device servos the output to maintain the ADJ pin voltage
at 1.22V referenced to ground. The current in R1 is then
equal to 1.22V/R1 and the current in R2 is the current in R1
相關(guān)PDF資料 |
PDF描述 |
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| LT1962-1.8 | 300mA, Low Noise, Micropower LDO Regulators(1.8V輸出,300mA, 低噪聲,微功耗,低壓差輸出穩(wěn)壓器) |
| LT1962-2.5 | 300mA, Low Noise, Micropower LDO Regulators(2.5V輸出,300mA, 低噪聲,微功耗,低壓差輸出穩(wěn)壓器) |
| LT1962-3 | 300mA, Low Noise, Micropower LDO Regulators(3V輸出,300mA, 低噪聲,微功耗,低壓差輸出穩(wěn)壓器) |
| LT1962-3.3 | 300mA, Low Noise, Micropower LDO Regulators(3.3V輸出,300mA, 低噪聲,微功耗,低壓差輸出穩(wěn)壓器) |
| LT1962-5 | 300mA, Low Noise, Micropower LDO Regulators(5V輸出,300mA, 低噪聲,微功耗,低壓差輸出穩(wěn)壓器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1962EMS8 | 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(xùn)模塊:More Information on LDOs 標(biāo)準(zhǔn)包裝:50 系列:- 穩(wěn)壓器拓?fù)浣Y(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(biāo)準(zhǔn)）: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(yīng)商設(shè)備封裝:D2PAK-3 包裝:管件 |
| 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(xùn)模塊:MIC5365/66 Ultra-small LDO Regulators 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3V 輸入電壓:最高 5.5V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.155V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?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(yīng)商設(shè)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(xùn)模塊:More Information on LDOs 標(biāo)準(zhǔn)包裝:50 系列:- 穩(wěn)壓器拓?fù)浣Y(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(biāo)準(zhǔn)）: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(yīng)商設(shè)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(xùn)模塊:More Information on LDOs 標(biāo)準(zhǔn)包裝:50 系列:- 穩(wěn)壓器拓?fù)浣Y(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(biāo)準(zhǔn)）: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(yīng)商設(shè)備封裝:D2PAK-3 包裝:管件 |
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