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LD1117A Schematic ( PDF Datasheet ) - Unisonic Technologies

Teilenummer LD1117A
Beschreibung LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
Hersteller Unisonic Technologies
Logo Unisonic Technologies Logo 




Gesamt 15 Seiten
LD1117A Datasheet, Funktion
UNISONIC TECHNOLOGIES CO., LTD
LD1117/A
LINEAR INTEGRATED CIRCUIT
LOW DROP FIXED AND
ADJUSTABLE POSITIVE
VOLTAGE REGULATORS
„ DESCRIPTION
The UTC LD1117/A is a low dropout, 3-terminal positive
voltage regulator designed to provide output current up to
800mA/1A, There are adjustable version (VREF=1.25V) and
various fixed versions.
„ FEATURES
* Low dropout voltage
* Suitable for SCSI-2 active termination if VOUT set to 2.85V
* Output current up to 0.8A for 1117 and 1.0A for 1117A
* Built-in current limit and over temperature protection
* Available in ±1%(at 25°C) and 2% in all temperature range
* Low current consumption
* Support MLCC
„ ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
Package
LD1117cL-xx-AA3-d-e LD1117cG-xx-AA3-d-e SOT-223
LD1117cL-xx-AB3-d-e LD1117cG-xx-AB3-d-e
SOT-89
LD1117cL-xx-TA3-d-e LD1117cG-xx-TA3-d-e
TO-220
LD1117cL-xx-TF3-d-e LD1117cG-xx-TF3-d-e TO-220F
LD1117cL-xx-TN3-d-e LD1117cG-xx-TN3-d-e
TO-252
LD1117cL-xx-TQ2-d-e LD1117cG-xx-TQ2-d-e
TO-263
LD1117cL-xx-TQ3-d-e LD1117cG-xx-TQ3-d-e TO-263-3
LD1117cL-xx-S08-d-e LD1117cG-xx-S08-d-e
SOP-8
Notes: 1. c : Current code: Blank: 800mA A: 1A
2. Pin Assignment: I: VIN O: VOUT G: GND/ADJ
3. xx: Output Voltage, Refer to Marking Information.
d
Pin Assignment
Pin Code 1 2 3
A GO I
B OG I
C GIO
D I GO
GOOIxOOx
e
Packing
R: Tape Reel
T: Tube
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
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LD1117A Datasheet, Funktion
LD1117/A
LINEAR INTEGRATED CIRCUIT
„ ELECTRICAL CHARACTERISTICS(Cont.)
For LD1117/A-1.8
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
SYMBOL
TEST CONDITIONS
VOUT
VOUT
VIN=3.8V, IOUT=10mA, TJ=25°C
VIN=3.3 to 8V
LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
ΔVOUT
ΔVOUT
VIN=3.3 to 8V, IOUT=0mA
VIN=3.3V
LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
ΔVOUT
ΔVOUT 1000 hrs, TJ=125°C
VIN IOUT=100mA
IQ VIN10V
ILIMIT VIN=6.8V, TJ=25°C
LD1117
LD1117A
eN
SVR
B=10Hz to 10KHz, TJ=25°C
IOUT=40mA, f=120Hz, TJ=25°C,
VIN=5.5V, VRIPPLE=1VPP
IOUT=100mA
VD
IOUT=500mA
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
MIN.
1.764
1.764
800
1000
60
For LD1117/A-2.5
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
SYMBOL
TEST CONDITIONS
VOUT VIN=4.5V, IOUT=10mA, TJ=25°C
VOUT
VIN=3.9 to 10V
LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
ΔVOUT VIN=3.9 to 10V, IOUT=0mA
ΔVOUT
ΔVOUT
VIN=3.9V
LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
ΔVOUT 1000 hrs, TJ=125°C
VIN IOUT=100mA
IQ
ILIMIT
VIN10V
VIN=7.5V, TJ=25°C
LD1117
LD1117A
eN B=10Hz to 10KHz, TJ=25°C
SVR
IOUT=40mA, f=120Hz, TJ=25°C,
VIN=5.5V, VRIPPLE =1VPP
IOUT=100mA
VD
IOUT=500mA
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
MIN.
2.450
2.450
800
1000
60
TYP.
1.800
1.800
1
1
0.5
0.3
5
100
75
1.00
1.15
1.20
1.20
0.01
TYP.
2.500
2.500
1
1
0.5
0.3
5
100
75
1.00
1.15
1.20
1.20
0.01
MAX.
1.836
1.836
6
10
15
10
1.10
1.25
1.30
1.30
0.10
MAX.
2.550
2.550
6
10
15
10
1.10
1.25
1.30
1.30
0.10
UNIT
V
V
mV
mV
%
%
V
mA
mA
μV
dB
V
%/W
UNIT
V
V
mV
mV
%
%
V
mA
mA
μV
dB
V
%/W
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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LD1117A pdf, datenblatt
LD1117/A
LINEAR INTEGRATED CIRCUIT
„ APPLICATION NOTE of LD1117/A ADJUSTABLE
The LD1117/A adjustable has a reference voltage of between the OUT and ADJ/GND pins. IADJ is 60µA typ.
(120µA max.) and ΔIADJ is 1μA typ. (5µA max.).
R1 is normally fixed to 120.
From figure 6 we obtain:
VOUT=VREF+R2(IADJ+IR1)=VREF + R2(IADJ+VREF/R1)=VREF(1+R2/R1) + R2 x IADJ.
Usually R2 value is in the range of few K, so the R2 X IADJ product could be neglected; then the above
expression becomes: VOUT=VREF(1+R2/R1)
For better load regulation, realize a good Kelvin connection of R1 and R2 is important. Particularly R1
connection must be realized very close to OUT and ADJ/GND pin, while R2 ground connection must be placed
as near as possible to the negative Load pin. Ripple rejection can be improved by introducing a 10μF
electrolytic capacitor placed in parallel to the R2 resistor (See Fig. 8)
Fig.6 Adjustable Output Voltage Application Circuit
Fig.7 Adjustable Output Voltage Application Circuit (FOR MLCC)
Fig.8 Adjustable Output Voltage Application with improved Ripple Rejection.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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