
LD1117
SERIES
LOW DROP FIXED AND ADJUSTABLE
POSITIVE VOLTAGE REGULATORS
March 2001
BLOCK DIAGRAM
TO-252 (DPAK)
TO-220
SO-8
SOT-223
■
LOW DROPOUT VOLTAGE (1V TYP)
■
2.85V DEVICE PERFORMANCES ARE
SUITABLE FOR SCSI-2 ACTIVE
TERMINATION
■
OUTPUT CURRENT UP TO 800mA
■
FIXED OUTPUT VOLTAGE OF: 1.8V, 2.5V,
2.85V, 3.0V, 3.3V, 5.0V
■
ADJUSTABLE VERSION AVAILABILITY
(V
ref
=1.25V)
■
INTERNAL CURRENT AND THERMAL LIMIT
■
AVAILABLE IN
±
1% (AT 25
o
C) AND 2% IN
FULL TEMPERATURE RANGE
■
SUPPLY VOLTAGE REJECTION : 75 dB (TYP)
■
TEMPERATURE RANGE : 0
o
C TO 125
o
C
DESCRIPTION
The LD1117 is a LOW DROP Voltage Regulator
able to provide up to 800mA of Output Current,
available
even
in
adjustable
version
(V
ref
=1.25V). Concerning fixed versions, are
offered the following Output Voltages: 2.5V,
2.85V, 3.0V 3.3V and 5.0V. The 2.85V type is
ideal for SCSI-2 lines active termination. The
device is supplied in: SOT-223, DPAK, SO-8
and TO-220. The SOT-223 and DPAK surface
mount
packages
optimize
the
thermal
characteristics even offering a relevant space
saving effect. High efficency is assured by NPN
pass transistor. In fact in this case, unlike than
PNP one, the Quiescent Current flows mostly
into the load. Only a very common 10
µ
F
minimum capacitor is neede d for stability. On
chip trimming allows the regulator to reach a
very tight output voltage tolerance, within
±
1%
at 25
o
C. The ADJUSTABLE LD1117 is pin to
pin
compatible
with
the
other
standard
Adjustable voltage regulators maintaining the
bette r performances in terms of Drop and
Tolerance.
1/18
5
4
Содержание HK 990/230
Страница 28: ......
Страница 60: ...58...
Страница 71: ...69...
Страница 72: ...70...
Страница 73: ...71...
Страница 78: ...76...
Страница 82: ...80...
Страница 83: ...81...
Страница 84: ...82...
Страница 85: ...83...
Страница 86: ...84...
Страница 87: ...85...
Страница 88: ...86...
Страница 89: ...87...
Страница 90: ...88...
Страница 91: ...89...
Страница 92: ...90...
Страница 93: ...91...
Страница 94: ...92...
Страница 95: ...93...
Страница 96: ...94...
Страница 97: ...95...
Страница 98: ...96...
Страница 99: ...97...
Страница 100: ...98...
Страница 101: ...99...
Страница 127: ...125...