LD1117AS18TR(2004) Просмотр технического описания (PDF) - STMicroelectronics

Номер в каталоге

Компоненты Описание

Список матч

LD1117AS18TR
(Rev.:2004)

LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS

STMicroelectronics 

LD1117A

SERIES

LOW DROP FIXED AND ADJUSTABLE

POSITIVE VOLTAGE REGULATORS

s LOW DROPOUT VOLTAGE

(1.15V TYP. @ IOUT = 1A, 25°C)

s VERY LOW QUIESCENT CURRENT

(5 mA TYP. @ 25°C)

s OUTPUT CURRENT UP TO 1A

s FIXED OUTPUT VOLTAGE OF: 1.2V, 1.8V,

2.5V, 2.85V, 3.3V, 5.0V

s ADJUSTABLE VERSION AVAILABILITY

(Vrel = 1.25V)

s INTERNAL CURRENT AND THERMAL LIMIT

s ONLY 10 µF FOR STABILITY

s AVAILABLE IN ± 2% (AT 25°C) AND 4% IN

FULL TEMPERATURE RANGE

s HIGH SUPPLY VOLTAGE REJECTION:

(80dB TYP. AT 25°C)

s TEMPERATURE RANGE: 0°C TO 125°C

DESCRIPTION

The LD1117A is a LOW DROP Voltage Regulator

able to provide up to 1A of Output Current,

available even in adjustable version (Vref=1.25V).

Concerning fixed versions, are offered the

following Output Voltages: 1.2V, 1.8V, 2.5V,

2.85V, 3.3V and 5.0V. The 2.85V type is ideal for

SCSI-2 lines active termination. The device is

SOT-223

TO-220

DPAK

supplied in: SOT-223, DPAK and TO-220. The

surface mount packages optimize the thermal

characteristics even offering a relevant space

saving effect. High efficiency is assured by NPN

pass transistor. Only a very common 10µF

minimum capacitor is needed for stability. Only

chip trimming allows the regulator to reach a very

tight output voltage tolerance, within ± 2% at 25°C.

Figure 1: Block Diagram

October 2004

Rev. 12

1/17

Share Link: