ETC RC1117D5X

www.fairchildsemi.com
RC1117
1A Adjustable/Fixed Low Dropout Linear Regulator
Features
Description
•
•
•
•
•
•
The RC1117 and RC1117-2.5, -2.85, -3.3 and -5 are low
dropout three-terminal regulators with 1A output current
capability. These devices have been optimized for low voltage
where transient response and minimum input voltage are
critical. The 2.85V version is designed specifically to be
used in Active Terminators for SCSI bus.
Low dropout voltage
Load regulation: 0.05% typical
Trimmed current limit
On-chip thermal limiting
Standard SOT-223, TO-263, and TO-252 packages
Three-terminal adjustable or fixed 2.5V, 2.85V, 3.3V, 5V
Current limit is trimmed to ensure specified output current
and controlled short-circuit current. On-chip thermal limiting
provides protection against any combination of overload and
ambient temperatures that would create excessive junction
temperatures.
Applications
•
•
•
•
•
•
Active SCSI terminators
High efficiency linear regulators
Post regulators for switching supplies
Battery chargers
5V to 3.3V linear regulators
Motherboard clock supplies
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent current
of the RC1117 flows into the load, increasing efficiency.
The RC1117 series regulators are available in the industrystandard SOT-223, TO-263 (D2PAK), and TO-252 (DPAK)
power packages.
Typical Applications
RC1117
VIN = 3.3V
VIN
+
VOUT
10µF
R1
124Ω
ADJ
1.5V at 1A
+
22µF
R2
24.9Ω
VOUT = VREF(1 + R2/R1) + IAdj • R2
RC1117-2.85
VIN = 5V
+
VIN
VOUT
10µF
2.85V at 1A
+
22µF
GND
REV. 1.2.9 12/7/01
PRODUCT SPECIFICATION
RC1117
Pin Assignments
Tab is
VOUT
Front View
Tab is
VOUT
Tab is
VOUT
3
IN
2
OUT
1
ADJ/GND
1
2
3
1
2
3
4-Lead Plastic SOT-223
ΘJC = 15°C/W*
ADJ/
GND
IN
ADJ/
GND
3-Lead Plastic TO-252
ΘJC = 3°C/W*
IN
3-Lead Plastic TO-263
ΘJC = 3°C/W*
*With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane., ΘJA can vary from
30°C/W to more than 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W.
Absolute Maximum Ratings
Parameter
Min.
Max.
7.5
V
0
125
°C
-65
150
°C
300
°C
VIN
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
2
Unit
REV. 1.2.9 12/7/01
RC1117
PRODUCT SPECIFICATION
Electrical Characteristics
Operating Conditions: VIN ≤ 7V, TJ = 25°C unless otherwise specified.
The • denotes specifications which apply over the specified operating temperature range.
Parameter
Min.
Typ.
Max.
Units
•
1.225
(-2%)
1.250
1.275
(+2%)
V
10mA ≤ IOUT ≤ 1A
RC1117-2.5, 4V ≤ VIN ≤ 7V
RC1117-2.85, 4.35V ≤ VIN ≤ 7V
RC1117-3.3, 4.8V ≤ VIN ≤ 7V
RC1117-5, 6.5V ≤ VIN ≤ 7V
•
•
•
•
2.450
2.793
3.234
4.900
2.5
2.85
3.3
5.0
2.550
2.907
3.366
5.100
V
V
V
V
(VOUT + 1.5V) ≤ VIN ≤ 7V, IOUT = 10mA
•
0.005
0.2
%
Load Regulation
(VIN – VOUT) = 2V, 10mA ≤ IOUT ≤ 1A
•
0.05
0.5
%
Dropout Voltage
∆VREF = 1%, IOUT = 1A
•
1.100
1.200
V
Current Limit
(VIN – VOUT) = 2V
•
Reference Voltage, VREF
Conditions
3
Output Voltage
Line Regulation1,2
1,2
1.5V ≤ (VIN - VOUT) ≤ 5.75V,
10mA ≤ IOUT ≤ 1A
Adjust Pin Current, IAdj3
µA
0.2
5
µA
•
Minimum Load Current
1.5V ≤ (VIN – VOUT) ≤ 5.75
•
•
VIN = VOUT + 1.25V
f = 120Hz, COUT = 22µF Tantalum,
(VIN – VOUT) = 3V, IOUT = 1A
Thermal Regulation
TA = 25°C, 30ms pulse
10
mA
4
60
13
72
0.004
•
Temperature Stability
A
120
1.5V ≤ (VIN – VOUT) ≤ 5.75,
10mA ≤ IOUT ≤ 1A
Quiescent Current
1.5
35
Adjust Pin Current Change3
Ripple Rejection
1.1
•
mA
dB
0.02
0.5
%/W
%
Long-Term Stability
TA = 125°C, 1000hrs.
0.03
RMS Output Noise
(% of VOUT)
TA = 25°C, 10Hz ≤ f ≤ 10kHz
0.003
%
Thermal Resistance, Junction SOT-223
to Case
TO-252, TO-263
15
°C/W
3
°C/W
Thermal Shutdown
155
°C
10
°C
Thermal Shutdown
Hysteresis
Junction Temperature
1.0
%
Notes:
1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are
measured at a constant junction temperature by low duty cycle pulse testing.
2. Line and load regulation are guaranteed up to the maximum power dissipation (18W). Power dissipation is determined by
input/output differential and the output current. Guaranteed maximum output power will not be available over the full input/
output voltage range.
3. RC1117 only.
REV. 1.2.9 12/7/01
3
PRODUCT SPECIFICATION
RC1117
Typical Performance Characteristics
0.10
DROPOUT VOLTAGE DEVIATION (%)
DROPOUT VOLTAGE (V)
1.5
1.4
1.3
1.2
1.1
TJ = 0°C
1.0
0.9
TJ = 25°C
0.8
TJ = 125°C
0.7
0.6
0.5
0
0
0.2
0.4
0.6
0.8
0.05
0
-0.05
-0.10
-0.15
-0.20
-75 -50 -25 0
1.0
OUTPUT CURRENT (A)
Figure 2. Load Regulation vs. Temperature
1.250
3.70
1.245
3.65
1.240
1.235
1.230
1.225
1.220
1.215
1.210
VOUT = 3.6V1
3.60
3.55
3.50
3.45
3.40
3.35
VOUT = 3.3V
3.30
3.25
1.200
-75 -50 -25 0
3.20
-75 -50 -25 0
25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 4. Output Voltage vs. Temperature
100
Note:
1. RC1117 Only
90
ADJUST PIN CURRENT (µA)
MINIMUM LOAD CURRENT (mA)
Note:
1. RC1117 Only
25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
5
4
3
2
1
80
70
60
50
40
30
20
10
0
-75 -50 -25 0
25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 5. Minimum Load Current vs. Temperature
4
VOUT SET WITH 1% RESISTORS
1.205
Figure 3. Reference Voltage vs. Temperature
25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
REFERENCE VOLTAGE (V)
Figure 1. Dropout Voltage vs. Output Current
∆I = 1A
0
-75 -50 -25 0
25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 6. Adjust Pin Current vs. Temperature
REV. 1.2.9 12/7/01
RC1117
PRODUCT SPECIFICATION
Typical Performance Characteristics (continued)
90
80
RIPPLE REJECTION (dB)
SHORT-CIRCUIT CURRENT (A)
2.0
1.75
1.5
1.25
70
60
50
40
30
(VIN - VOUT) = 3V
0.5 < VRIPPLE < 2V
IOUT = 1A
20
10
1.0
-75 -50 -25 0
0
10
25 50 75 100 125 150 175
100
JUNCTION TEMPERATURE (°C)
1K
10K
100K
FREQUENCY (Hz)
Figure 7. Short-Circuit Current vs. Temperature
Figure 8. Ripple Rejection vs. Frequency
10
POWER (W)
7.5
TO-252 & TO-263
5
SOT-223
2.5
0
25
45
65
85
105
125
CASE TEMPERATURE (°C)
Figure 9. Maximum Power Dissipation
REV. 1.2.9 12/7/01
5
PRODUCT SPECIFICATION
RC1117
Mechanical Dimensions
4-Lead SOT-223 Package
Inches
Symbol
Millimeters
Min.
Max.
Min.
Max.
A
A1
B
c
D
—
—
.025
—
.248
.071
.181
1.80
4.80
E
e
F
H
I
J
K
L
M
N
.130
.148
—
—
.640
—
6.30
3.30
.840
2.29
6.71
3.71
.115
.033
.264
.012
—
10°
.0008
10°
.010
.124
.041
.287
—
10°
16°
.0040
16°
.014
2.95
.840
6.71
.310
—
10°
.0203
10°
.250
3.15
1.04
7.29
—
10°
16°
.1018
16°
.360
.033
.090
.264
Notes
D
e
K
A
H
E
N
J
M
B
I
L
A1
c
6
F
REV. 1.2.9 12/7/01
RC1117
PRODUCT SPECIFICATION
Mechanical Dimensions
3-Lead TO-252 Package
Inches
Symbol
Min.
A
b
b2
b3
c
c2
D
E
e
H
L
L1
L3
L4
Max.
Millimeters
Min.
Notes:
Notes
Max.
.086
.094
.025
.035
.030
.045
.205
.215
.018
.024
.018
.023
.210
.245
.250
.265
.090 BSC
.370
.410
2.19
2.39
0.64
0.89
0.76
1.14
5.21
5.46
0.46
0.61
0.46
0.58
5.33
6.22
6.35
6.73
2.29 BSC
9.40
10.41
.055
.070
.108 REF
.035
.080
.025
.040
1.40
1.78
2.74 REF
0.89
2.03
0.64
1.02
4
1.
Dimensions are exclusive of mold flash and metal burrs.
2.
Stand off-height is measured from lead tip with ref. to Datum -B-.
3.
Foot length is measured with ref. to Datum -A- with lead surface.
4.
Thermal pad contour optional within dimensions b3 and L3
5.
Formed leads to be planar with respect to one another at seating
plane -C-.
6.
Dimensions and tolerances per ASME Y14.5M-1994.
1
1
3
4
E
@PKG/
@HEATSINK
L3
b3
c2
D
E-PIN
L4
H
b2
L1
L
c
b
e
-B-
α = 0°–10°
-A-
A
-C-
REV. 1.2.9 12/7/01
7
PRODUCT SPECIFICATION
RC1117
Mechanical Dimensions
3-Lead TO-263 Package
Symbol
Inches
Millimeters
Notes
Min.
Max.
Min.
Max.
A
b
b2
c2
D
E
e
.160
.020
.190
.039
4.06
0.51
4.83
0.99
L
L1
L2
R
α
.575
.090
—
.017
0°
.049
.051
.045
.055
.340
.380
.380
.405
.100 BSC
.625
.110
.055
.019
8°
1.25
1.30
1.14
1.40
8.64
9.65
9.65
10.29
2.54 BSC
14.61
2.29
—
0.43
0°
Notes:
1. Dimensions are exclusive of mold flash and metal burrs.
2. Standoff-height is measured from lead tip with ref. to Datum -B-.
3. Foot length is measured with ref. to Datum -A- with lead surface
(at inner R).
4. Dimensiuon exclusive of dambar protrusion or intrusion.
5. Formed leads to be planar with respect to one another at seating
place -C-.
15.88
2.79
1.40
0.78
8°
E
@PKG/
@HEATSINK
L2
c2
D
E-PIN
L
R (2 PLCS)
b2
L1
b
e
-B-
-A-
A
-C-
8
REV. 1.2.9 12/7/01
PRODUCT SPECIFICATION
RC1117
Ordering Information
Product Number
Output
Package
RC1117DX
Adjustable
TO-252 in tape and reel
RC1117M
Adjustable
TO-263
RC1117MT
Adjustable
TO-263 in tape and reel
RC1117ST
Adjustable
SOT-223 in tape and reel
RC1117D25X
2.5 volt
TO-252 in tape and reel
RC1117M25
2.5 volt
TO-263
RC1117M25T
2.5 volt
TO-263 in tape and reel
RC1117S25T
2.5 volt
SOT-223 in tape and reel
RC1117M285
2.85 volt
TO-263
RC1117M285T
2.85 volt
TO-263 in tape and reel
RC1117S285T
2.85 volt
SOT-223 in tape and reel
RC1117D33X
3.3 volt
TO-252 in tape and reel
RC1117M33
3.3 volt
TO-263
RC1117M33T
3.3 volt
TO-263 in tape and reel
RC1117S33T
3.3 volt
SOT-223 in tape and reel
RC1117D5X
5 volt
TO-252 in tape and reel
RC1117M5
5 volt
TO-263
RC1117M5T
5 volt
TO-263 in tape and reel
RC1117S5T
5 volt
SOT-223 in tape and reel
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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