Datasheet > L4987CXX50

L4987CXX50

更新时间： 2024-09-15 23:43:47

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
13页	278K
描述
VERY LOW DROP VOLTAGE REGULATOS WITH INHIBIT AND DROPOUT CONTROL FLAG

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L4987CXX50 数据手册

L4987

SERIES

VERY LOW DROP VOLTAGE REGULATORS

WITH INHIBIT AND DROPOUT CONTROL FLAG

■

VERY LOW DROPOUT VOLTAGE

(0.25V TYP.)

■

DROPOUT CONTROL FLAG

VERY LOW QUIESCENT CURRENT

(TYP. 90 mA IN OFF MODE, 500mA IN ON

MODE)

■

OUTPUT CURRENT UP TO 200 mA

LOGIC-CONTROLLED ELECTRONIC

SHUTDOWN

■

OUTPUT VOLTAGES OF 3V, 3.3V, 5V, 8.7V,

12V

PPAK

■

INTERNAL CURRENT AND THERMAL LIMIT

ONLY 2.2µF FOR STABILITY

AVAILABLE IN ± 2% SELECTION AT 25°C

SUPPLY VOLTAGE REJECTION: 70dB (TYP.)

DESCRIPTION

The L4987 is a very low drop regulator available in

PPAK. The very low drop-voltage (0.5V Max at

200 mA) and the very low quiescent current make

it particularly suitable for low noise, low power

applications, and in battery powered systems. The

input dump protection up to 40V makes it ideal for

of the board in standby, decreasing the total

power consumption. The regulator employs an

output pin (open collector) providing a logic signal

when the pass transistor is in saturation at low

input voltage, this signal can be used to prevent

the pop-up phenomenon in the car radio. In

battery powered systems (the cellular phone,

notebook) it is possible to use the flag to monitor

the battery charge status through the dropout of

the regulator.

automotive applications.

shutdown Logic

Control function is available (pin2, TTL

compatible). This means that when the device is

used as a local regulator, it is possible to put a part

SCHEMATIC DIAGRAM

October 2003

1/13

12 3 4 5 6 7...13

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