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LRC
LESHAN RADIO COMPANY,LTD.
LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
DESCRIPTION
The LRC LR1117/A is a LOW DROP Voltage Regulator able to provide up to 0.8/1.0A of Output Current, available even in adjustable version (Vref=1.25V). Concerning fixed versions, are offered the following Output Voltages: 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 3.6V and 5.0V. The 2.85V type is ideal for SCSI-2 lines active termination. High efficiency is assured by NPN pass transistor. In fact in the case, unlike than PNP one, the Quiescent Current flows mostly into the for stability. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1% at 25C. The ADJUSTABLE LR1117/A is pin to pin compatible with the other standard Adjustable voltage regulators maintaining the better performances in terms of Drop and Tolerance.
1
23 TO-220 1
2 1 3 TO-252
32
SOT-223
FEATURES
*Low dropout voltage (1V Typ.) *2.85V device performances are suitable for SCSI-2 active termination *Output current up to 0.8/1.0A *Fixed output voltage of: 1.5V, 1.8V, 2.5V, 2,85V, 3.0V, 3.3V, *3.6V, 5.0V *Adjustable version availability (Vref=1.25V) *Internal current and thermal limit *Available in 1%(at 25C) and 2% in all temperature range *Supply voltage rejection: 75dB (TYP) *Temperature range: 0C to 125C
1: GND
2: Output
3: Input
ABSOLUTE MAXIMUM RATINGS
PARAMETER
DC Input Voltage Power Dissipation Storage temperature Operating Junction Temperature
SYMBOL
VIN Ptot Tstg Top
VALUE
15 12 -65 ~ +150 0 ~ +125 50
UNIT
V W C C C/W
Thermal Resistance Junction ambien
Rthj-amb
Note: Absolute Maximum Ratings are those value beyond which damage to the device may occur. Functional operation under there condition is not implied. Over the above suggested Max Power Dissipation a Short Circuit could definitively damage the device.
1/10
LRC
LESHAN RADIO COMPANY,LTD.
LR1117/A-1.5 ELECTRICAL CHARACTERISTICS
(refer to the test circuits, Tj=0 to 125 C, Co=10 F unless otherwise specified)
PARAMETER
Output Voltage Output Voltage Line Regulation Load Regulation Temperature stability Long Term Stability Operating Input Voltage Quiescent Current Output Current Output Noise Voltage Supply Voltage Rejection Dropout Voltage
SYMBOL
Vo Vo Vo Vo Vo Vo Vin Id Io eN SVR Vd
TEST CONDITIONS
Vin=3.5V, Io=10mA, Tj=25 C Io=0 to 800/1000mA, Vin=3 to 8V Vin=3 to 8V, Io=0mA Vin=3V, Io=0 to 800/1000mA 1000 hrs, Tj=125 C Io=100mA Vin 10V Vin=6.5V, Tj=25 C B=10Hz to 10KHz, Tj=25 C Io=40mA, f=120Hz, Tj=25 C, Vin=4.5V, Vripple=1Vpp Io=100mA Io=500mA Io=800mA Io=1000 mA Ta=25 C, 30ms Pulse
MIN.
1.485 1.470
TYP.
1.500 1.500 1 1 0.5 0.3 5 950 100 75 1.00 1.05 1.10 1.15 0.01
MAX.
1.515 1.530 6 10
UNIT
VV V mV mV % % V mA mA V dB V V V V %/W
800 60
15 10 1200
Thermal Regulation
1.10 1.15 1.20 1.25 0.10
LR1117/A-1.8 ELECTRICAL CHARACTERISTICS
(refer to the test circuits, Tj=0 to 125 C, Co=10 F unless otherwise specified)
PARAMETER
Output Voltage Output Voltage Line Regulation Load Regulation Temperature stability Long Term Stability Operating Input Voltage Quiescent Current Output Current Output Noise Voltage Supply Voltage Rejection Dropout Voltage
SYMBOL
Vo Vo Vo Vo Vo Vo Vin Id Io eN SVR Vd
TEST CONDITIONS
Vin=3.8V, Io=10mA, Tj=25 C Io=0 to 800/1000mA, Vin=3.3 to 8V Vin=3.3 to 8V, Io=0mA Vin=3.3V, Io=0 to 800/1000mA 1000 hrs, Tj=125 C Io=100mA Vin 8V Vin=6.8V, Tj=25 C B=10Hz to 10KHz, Tj=25 C Io=40mA, f=120Hz, Tj=25 C, Vin=5.5V, Vripple=1Vpp Io=100mA Io=500mA Io=800mA Io=1000mA Ta=25 C, 30ms Pulse
MIN.
1.780 1.760
TYP.
1.800 1 1 0.5 0.3 5 950 100 75 1.00 1.05 1.10 1.15 0.01
MAX.
1.820 1.840 6 10
UNIT
V V mV mV % % V mA mA V dB V V V V %/W
800 60
10 10 1200
Thermal Regulation
1.10 1.15 1.20 1.25 0.10
2/10
LRC
LESHAN RADIO COMPANY,LTD.
LR1117/A-2.5 ELECTRICAL CHARACTERISTICS
(refer to the test circuits, Tj=0 to 125 C, Co=10 F unless otherwise specified)
PARAMETER
Output Voltage Output Voltage Line Regulation Load Regulation Temperature stability Long Term Stability Operating Input Voltage Quiescent Current Output Current Output Noise Voltage Supply Voltage Rejection Dropout Voltage
SYMBOL
Vo Vo Vo Vo Vo Vo Vin Id Io eN SVR Vd
TEST CONDITIONS
Vin=4.5V, Io=10mA, Tj=25 C Io=0 to 800/1000mA, Vin=3.9 to 10V Vin=3.9 to 10V, Io=0mA Vin=3.9V, Io=0 to 800/1000mA 1000 hrs, Tj=125 C Io=100mA Vin 10V Vin=7.5V, Tj=25 C B=10Hz to 10KHz, Tj=25 C Io=40mA, f=120Hz, Tj=25 C, Vin=5.5V, Vripple=1Vpp Io=100mA Io=500mA Io=800mA Io=1000mA Ta=25 C, 30ms Pulse 1% % % %
MIN.
2.475 2.450 2.450 2.400
TYP.
2.500 2.500
MAX.
2.525 2.550 2.550 2.600 6 10
UNIT
V V V V mV mV % % V mA mA V dB V V V V %/W
1 1 0.5 0.3 5 950 100 75 1.00 1.05 1.10 1.15 0.01
800 60
15 10 1200
Thermal Regulation
1.10 1.15 1.20 1.25 0.10
LR1117/A-2.85 ELECTRICAL CHARACTERISTICS
(refer to the test circuits, Tj=0 to 125 C, Co=10 F unless otherwise specified)
PARAMETER
Output Voltage Output Voltage Line Regulation Load Regulation Temperature stability Long Term Stability Operating Input Voltage Quiescent Current Output Current Output Noise Voltage Supply Voltage Rejection Dropout Voltage
SYMBOL
Vo Vo Vo Vo Vo Vo Vin Id Io eN SVR Vd
TEST CONDITIONS
Vin=4.85V, Io=10mA, Tj=25 C Io=0 to 800/1000mA,Vin=4.25 to 10V Vin=4.25 to 10V, Io=0mA Vin=4.25V, Io=0 to 800/1000mA 1000 hrs, Tj=125 C Io=100mA Vin 10V Vin=7.85V, Tj=25 C B=10Hz to 10KHz, Tj=25 C Io=40mA, f=120Hz, Tj=25 C, Vin=5.85V, Vripple=1Vpp Io=100mA Io=500mA Io=800mA Io=1000mA Ta=25 C, 30ms Pulse
MIN.
2.82 2.79
TYP.
2.85 1 1 0.5 0.3 5 950 100 75 1.00 1.05 1.10 1.15 0.01
MAX.
2.88 2.91 6 10
UNIT
V V mV mV % % V mA mA V DB V V V V %/W
800 60
15 10 1200
Thermal Regulation
1.10 1.15 1.20 1.25 0.10
3/10
LRC
LESHAN RADIO COMPANY,LTD.
LR1117/A-3.0 ELECTRICAL CHARACTERISTICS
(refer to the test circuits, Tj=0 to 125 C, Co=10 F unless otherwise specified)
PARAMETER
Output Voltage Output Voltage Line Regulation Load Regulation Temperature stability Long Term Stability Operating Input Voltage Quiescent Current Output Current Output Noise Voltage Supply Voltage Rejection Dropout Voltage
SYMBOL
Vo Vo Vo Vo Vo Vo Vin Id Io eN SVR Vd
TEST CONDITIONS
Vin=5V, Io=10mA, Tj=25 C Io=0 to 800/1000mA, Vin=4.5 to 10V Vin=4.5 to 12V, Io=0mA Vin=4.5V, Io=0 to 800/1000mA 1000 hrs, Tj=125 C Io=100mA Vin 12V Vin=8V, Tj=25 C B=10Hz to 10KHz, Tj=25 C Io=40mA, f=120Hz, Tj=25 C, Vin=6V, Vripple=1Vpp Io=100mA Io=500mA Io=800mA Io=1000mA Ta=25 C, 30ms Pulse 1% % % %
MIN.
2.97 2.94 2.94 2.88
TYP.
3.00 3.00
MAX.
3.03 3.06 3.06 3.12 6 10
UNIT
V V V V mV mV % % V mA mA V dB V V V V %/W
1 1 0.5 0.3 5 950 100 75 1.00 1.05 1.10 1.15 0.01
800 60
15 10 1200
Thermal Regulation
1.10 1.15 1.20 1.25 0.10
LR1117/A-3.3 ELECTRICAL CHARACTERISTICS
(refer to the test circuits, Tj=0 to 125 C, Co=10 F unless otherwise specified)
PARAMETER
Output Voltage Output Voltage Line Regulation Load Regulation Temperature stability Long Term Stability Operating Input Voltage Quiescent Current Output Current Output Noise Voltage Supply Voltage Rejection Dropout Voltage
SYMBOL
Vo Vo Vo Vo Vo Vo Vin Id Io eN SVR Vd
TEST CONDITIONS
Vin=5.3V, Io=10mA, Tj=25 C Io=0 to 800/1000mA, Vin=4.75 to 10V Vin=4.75 to 15V, Io=0mA Vin=4.75V, Io=0 to 800/1000mA 1000 hrs, Tj=125 C Io=100mA Vin 15V Vin=8.3V, Tj=25 C B=10Hz to 10KHz, Tj=25 C Io=40mA, f=120Hz, Tj=25 C, Vin=6.3V, Vripple=1Vpp Io=100mA Io=500mA Io=800mA Io=1000mA Ta=25 C, 30ms Pulse 1% % % %
MIN.
3.267 3.235 3.235 3.160
TYP.
3.300 3.300
MAX.
3.333 3.365 3.365 3.440 6 10
UNIT
V V V V mV mV % % V mA mA V DB V V V V %/W
1 1 0.5 0.3 5 950 100 75 1.00 1.05 1.10 1.15 0.01
800 60
15 10 1200
Thermal Regulation
1.10 1.15 1.20 1.25 0.10
4/10
LRC
LESHAN RADIO COMPANY,LTD.
LR1117/A-3.6 ELECTRICAL CHARACTERISTICS
(refer to the test circuits, Tj=0 to 125 C, Co=10 F unless otherwise specified)
PARAMETER
Output Voltage Output Voltage Line Regulation Load Regulation Temperature stability Long Term Stability Operating Input Voltage Quiescent Current Output Current Output Noise Voltage Supply Voltage Rejection Dropout Voltage
SYMBOL
Vo Vo Vo Vo Vo Vo Vin Id Io eN SVR Vd
TEST CONDITIONS
Vin=5.6V, Io=10mA, Tj=25 C Io=0 to 800/1000mA, Vin=5 to 10V Vin=5 to 15V, Io=0mA Vin=5V, Io=0 to 800/1000mA 1000 hrs, Tj=125 C Io=100mA Vin 15V Vin=8.6V, Tj=25 C B=10Hz to 10KHz, Tj=25 C Io=40mA, f=120Hz, Tj=25 C, Vin=6.6V, Vripple=1Vpp Io=100mA Io=500mA Io=800mA Io=1000mA Ta=25 C, 30ms Pulse
MIN.
3.564 3.528
TYP.
3.600 3.600 1 1 0.5 0.3 5 950 100 75 1.00 1.05 1.10 1.15 0.01
MAX.
3.636 3.672 6 10
UNIT
V V mV mV % % V mA mA V DB V V V V %/W
800 60
15 10 1200
Thermal Regulation
1.10 1.15 1.20 1.25 0.10
LR1117/A-5.0 ELECTRICAL CHARACTERISTICS
(refer to the test circuits, Tj=0 to 125 C, Co=10 F unless otherwise specified)
PARAMETER
Output Voltage Output Voltage Line Regulation Load Regulation Temperature stability Long Term Stability Operating Input Voltage Quiescent Current Output Current Output Noise Voltage Supply Voltage Rejection Dropout Voltage
SYMBOL
Vo Vo Vo Vo Vo Vo Vin Id Io eN SVR Vd
TEST CONDITIONS
Vin=7V, Io=10mA, Tj=25 C Io=0 to 800/1000mA, Vin=6.5 to 15V Vin=6.5 to 15V, Io=0mA Vin=6.5V, Io=0 to 800/1000mA 1000 hrs, Tj=125 C Io=100mA Vin 15V Vin=10V, Tj=25 C B=10Hz to 10KHz, Tj=25 C Io=40mA, f=120Hz, Tj=25 C, Vin=8V, Vripple=1Vpp Io=100mA Io=500mA Io=800mA Io=1000mA Ta=25 C, 30ms Pulse 1% % % %
MIN.
4.95 4.90 4.90 4.80
TYP.
5.00 5.00
MAX.
5.05 5.10 5.10 5.20 10 15
UNIT
V V V V mV mV % % V mA mA V dB V V V V %/W
1 1 0.5 0.3 5 950 100 75 1.00 1.05 1.10 1.15 0.01
800 60
15 10 1200
Thermal Regulation
1.10 1.15 1.20 1.25 0.10
5/10
LRC
LESHAN RADIO COMPANY,LTD.
LR1117/A-ADJUSTABLE ELECTRICAL CHARACTERISTICS
(refer to the test circuits, Tj=0 to 125 C, Co=10 F unless otherwise specified)
PARAMETER
Reference Voltage Reference Voltage Line Regulation Load Regulation Temperature stability Long Term Stability Operating Input Voltage Adjustment Pin Current Adjustment Pin Current Change Minimum Load Current Output Current Output Noise (%Vo) Supply Voltage Rejection Dropout Voltage
SYMBOL
Vref Vref Vo Vo Vo Vo Vin Iadj Iadj Io(min) Io eN SVR Vd
TEST CONDITIONS
Vin-VO=2V, Io=10mA, Tj=25 C Io=10 to 800/1000mA, Vin-Vo=1.4 to 10V Vin-Vo=1.5 to 13.75V, Io=10mA Vin-Vo=3V, Io=10 to 800/1000mA 1000 hrs, Tj=125 C Vin 15V Vin-Vo=1.4 to 10V, Io=10 to 800/1000mA Vin=15V Vin-Vo=5V, Tj=25 C B=10Hz to 10KHz, Tj=25 C Io=40mA, f=120Hz, Tj=25 C, Vin-Vo=3V, Vripple=1Vpp Io=100mA Io=500mA Io=800mA Io=1000mA Ta=25 C, 30ms Pulse
MIN.
1.238 1.225
TYP.
1.25
MAX.
1.262 1.275 0.200 0.400
UNIT
V V % % % % V A A mA mA % dB V V V V %/W
0.035 0.10 0.50 0.3 60 1 2 950 0.003 75 1.00 1.05 1.10 1.15 0.01
15 120 5 5 1200
800 60
Thermal Regulation
1.10 1.15 1.20 1.25 0.10
TYPICAL APPLICATIONS
Input 10 mF
3
+
LR1117 1
2 Output
+ 10
Input 10 mF
3
+
LR1117 1
2 Output
+ 10
mF
mF
Fig 1. Fixed Output Regulator
Fig 2. Adjustable Output Regulator
110 W 3 10 mF 4.75 V to 5.25 V
+ +
LR1117 1
2
+ 22
110 W mF 110 W 18 to 27 Lines
110 W
Fig 3. Active SCSI Bus Terminator
6/10
LRC
LESHAN RADIO COMPANY,LTD.
LR1117/A ADJUSTABLE APPLICATION NOTE
The LR1117/A ADJUSTABLE has a thermal stabilized 1.25 0.012V reference voltage between the OUT and ADJ pins. IADJ is 60 A typ. (120 A max.) and IADJ is 1 A typ. (5 A max.). R1 is normally fixed to 120 . From figure 7 we obtain: VOUT=VREF+R2(IADJ + IR1)=VREF + R2(IADJ + VREF / R1)=VREF(1+R2/R1) + R2 x IADJ. In normal application R2 value is in the range of few Kohm,, so the R2 X IADJ product could not be considered in the VOUT calculation; then the above expression becomes: VOUT=VREF(1+R2/R1) In order to have the better load regulation it is important to realize a good Kelvin connection of R1 and R2 resistors. In particular R1 connection must be realized very close to OUT and ADJ 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 10 F electrolytic capacitor placed in parallel to the R2 resistor (See Fig. 6)
VIN
3
IN
LR1117/A ADJ 1
OUT
2
VOUT=1.25V
10UF
10UF R1 120
FIG.4 Adjustable Output 1.25 Voltage Application Circuit
VIN
3
IN
LR1117/A ADJ 1
OUT
2
VOUT
10UF
10UF R1 120 R2 VREF
FIG.5 Adjustable Output Voltage Application Circuit
VIN
3
IN
LR1117/A ADJ 1
OUT
2
VOUT
10UF
10UF R1 120 R2 10UF VREF
FIG.6 Adjustable Output Voltage Application with improved Ripple Rejection.
7/10
LRC
LESHAN RADIO COMPANY,LTD.
TO-220-3L PACKAGE OUTLINE DIMENSIONS
A D C1
E1
F
L1
b1
E
A1
b L
e e1
C
Dimensions In Millimeters Symbol A A1 b b1 c c1 D E E1 e e1 F L L1 4.980 2.590 13.400 3.560 3.790 Min 4.470 2.520 0.710 1.170 0.310 1.710 10.010 8.500 12.060 2.540TYP 5.180 2.890 13.800 3.960 3.890 Max 4.670 2.820 0.910 1.370 0.530 1.370 10.310 8.900 12.460 Min
Dimensions In Inches Max 0.184 0.111 0.036 0.054 0.021 0.054 0.406 0.350 0.491 0.100TYP 0.196 0.102 0.528 0.140 0.149 0.204 0.114 0.543 0.156 0.153
1.176 0.099 0.028 0.046 0.012 0.046 0.394 0.335 0.475
8/10
LRC
TO-252-2 PACKAGE OUTLINE DIMENSIONS
LESHAN RADIO COMPANY,LTD.
Symbol A A1 B b b1 c c1 D D1 E e e1 L1 L2 L3 L4 V
Dimensions In Millimeters Min Max 2.200 2.400 0.000 0.127 1.350 1.650 0.500 0.700 0.700 0.900 0.430 0.580 0.430 0.580 6.350 6.650 5.200 5.400 5.400 5.700 2.300TYP 4.500 4.700 9.500 9.900 1.400 1.780 0.650 0.950 2.550 2.900 3.80REF
Dimensions In Inches Min Max 0.087 0.094 0.000 0.005 0.053 0.065 0.020 0.028 0.028 0.035 0.017 0.023 0.017 0.023 0.250 0.262 0.205 0.213 0.213 0.224 0.091TYP 0.177 0.185 0.374 0.390 0.055 0.070 0.026 0.037 0.100 0.114 0.150REF
9/10
LRC
LESHAN RADIO COMPANY,LTD.
SOT-223 PACKAGE OUTLINE DIMENSIONS
Symbol A A1 A2 b c D D1 E E1 e e1 L L1
Dimensions In Millimeters Min Max 1.520 1.800 0.020 0.100 1.500 1.700 0.610 0.810 0.250 0.350 6.300 6.700 2.900 3.100 3.300 3.700 6.700 7.300 2.300TYP 4.500 4.700 1.750TYP 0.900 0 10
Dimensions In Inches Min Max 0.060 0.071 0.001 0.004 0.059 0.067 0.024 0.032 0.010 0.014 0.248 0.264 0.114 0.122 0.130 0.146 0.264 0.287 0.091TYP 0.177 0.185 0.069TYP 0.035 0 10
10/10

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