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LD1117A

SERIES

LOW DROP FIXED AND ADJUSTABLE

POSITIVE VOLTAGE REGULATORS

s

s

s

s

s

s

s

s

s

s

LOW DROPOUT VOLTAGE

(1.15V TYP. @ I

OUT

= 1A, 25擄C)

VERY LOW QUIESCENT CURRENT

(5 mA TYP. @ 25擄C)

OUTPUT CURRENT UP TO 1A

FIXED OUTPUT VOLTAGE OF: 1.2V, 1.8V,

2.5V, 2.85V, 3.3V, 5.0V

ADJUSTABLE VERSION AVAILABILITY

(V

rel

= 1.25V)

INTERNAL CURRENT AND THERMAL LIMIT

ONLY 10 碌F FOR STABILITY

AVAILABLE IN 鹵 2% (AT 25擄C) AND 4% IN

FULL TEMPERATURE RANGE

HIGH SUPPLY VOLTAGE REJECTION:

(80dB TYP. AT 25擄C)

TEMPERATURE RANGE: 0擄C TO 125擄C

SOT-223

TO-220

DPAK

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

Figure 1: Block Diagram

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 10碌F

minimum capacitor is needed for stability. Only

chip trimming allows the regulator to reach a very

tight output voltage tolerance, within 鹵 2% at 25擄C.

October 2004

Rev. 12

1/17

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