L4987CPT33TR datasheet(1/16 Pages) STMICROELECTRONICS

tên linh kiện	L4987CPT33TR

Giải thích chi tiết về linh kiện	Dropout control flag

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September 2007

Rev. 6

1/16

16

L4987Cxx

Very low drop voltage regulators

with inhibit and dropout control flag

Features

■ Very low dropout voltage (0.25 V typ.)

■ Dropout control flag

■ Very low quiescent current

■ (Typ. 90 mA in OFF Mode, 500 mA in ON

Mode)

■ Output current up to 200 mA

■ Logic-controlled electronic shutdown

■ Output voltages of 3.3 V, 5 V

■ Internal current and thermal limit

■ Only 2.2 µF for stability

■ Available in ± 2% selection at 25°C

■ Supply voltage rejection: 70 dB (typ.)

Description

The L4987 is a very low drop regulator available

in PPAK. The very low drop-voltage (0.5 V 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 40 V makes it

ideal for automotive applications. a shutdown

Logic Control function is available (pin 2, TTL

compatible). This means that when the device is

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

part 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.

PPAK

Table 1.

Device summary

Part number

Order code

Output voltage

L4987Cxx33

L4987CPT33TR

3.3 V

L4987Cxx50

L4987CPT50TR

5.0 V

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Obsolete

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Số phần tương tự - L4987CPT33TR

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
STMicroelectronics	L4987CPT30	94Kb / 11P	VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT AND DROPOUT CONTROL FLAG Oct-1998

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Mô tả tương tự - L4987CPT33TR

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
STMicroelectronics	L4987	94Kb / 11P	VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT AND DROPOUT CONTROL FLAG Oct-1998
Semtech Corporation	SC1457	218Kb / 13P	150mA Ultra Low Dropout Regulator with Undervoltage Flag
National Semiconductor ...	LP38511-1.8	339Kb / 14P	800 mA Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag
	LP38512-1.8	339Kb / 14P	1.5A Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag
	LP38512	366Kb / 14P	1.5A Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag
Texas Instruments	LP38512	359Kb / 16P	1.5A Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag
Gamma Microelectronics ...	GM4275	166Kb / 7P	WIDE INPUT RANGE 5V LOW DROPOUT REGULATOR WITH RESET FLAG
Texas Instruments	LP38512-18	1Mb / 20P	1.5A Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag
	LP38511	1Mb / 20P	800 mA Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag
	LP38512	1Mb / 21P	1.5A Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag

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