UNISONIC TECHNOLOGIES CO.,LTD.
LD1117/A
Linear Integrated Circuit
LOW DROP FIXED AND
ADJUSTABLE POSITIVE
VOLTAGE REGULATORS
1
SOT-223
TO-220
TO-263
SOP-8
ꢀ
DESCRIPTION
The UTC LD1117/A is a low dropout, 3-terminals
1
1
positive voltage regulator designed to provide output current
up to 800mA/1A, even available in adjustable version
(Vref=1.25V). Regarding fixed versions, 1.5V, 1.8V, 2.5V,
2.85V, 3.0V, 3.3V, 3.6V and 5.0V are offered. The 2.85V
type is ideal for SCSI-2 lines active termination. Various
surface mount packages optimize the thermal characteristics
even offering a relevant space saving effect, including
SOT-223, TO-263, TO-252and SOP-8.
TO-252
1
1
TO-263-3
High efficiency is assured by NPN pass transistor. In
fact, in the case, unlike than PNP one, the Quiescent Current
flows mostly into the load. Only a very common 10µF
minimum capacitor is needed for stability. It allows very tight
output voltage tolerance within ±1% at 25°C by chip trim.
Moreover, the ADJUSTABLE version is pin to pin compatible
with the other standard Adjustable voltage regulators
maintaining the better performances in terms of Drop and
Tolerance.
*Pb-free plating product number:
- LD1117L-xx
- LD1117AL-xx
ꢀ
FEATURES
*Low dropout voltage (1V Typ.)
*2.85V device performances are suitable for SCSI-2 active
termination
*Output current up to 0.8A/1.0A
*Adjustable version availability (Vref=1.25V)
*Internal current and thermal limit.
*Available in ±1%(at 25°C) and 2% in all temperature range
*Supply voltage rejection: 75dB (TYP)
ꢀ
ORDERING INFORMATION
Order Number
②
Package
③
Pin Assignment
Packing
Normal
Lead Free Plating
LD1117①-xx-AA3-②-③
LD1117①-xx-TA3-②-③
LD1117①-xx-TN3-②-③
LD1117①-xx-TQ2-②-③
LD1117①-xx-TQ3-②-③
LD1117①-xx-S08-②-③
LD1117①L-xx-AA3-②-③
LD1117①L-xx-TA3-②-③
LD1117①L-xx-TN3-②-③
LD1117①L-xx-TQ2-②-③
LD1117①L-xx-TQ3-②-③
LD1117①L-xx-S08-②-③
SOT-223
A: GOI
TO-220
B: OGI
TO-252
C: GIO
R: Tape Reel
T: Tube
TO-263
D: IGO
TO-263-3
SOP-8
GOOIxOOx
Note: 1. ①: Current code: Blank: 800mA A: 1A
2. Pin assignment: I:Vin O:Vout G:GND x:NC
3. xx: Output Voltage, refer to Marking Information.
Example: LD1117L-285-AA3-B-T
ꢁ800mA, 2.85V, SOT-223 package, Pin1:Vout, Pin2:Ground, Pin3:Vin, packing by Tube.
www.unisonic.com.tw
1
Copyright © 2005 Unisonic Technologies Co.,LTD.
QW-R102-006,M