SCP51460 D

SCP51460
High Accuracy Low Noise
20mA LDO Regulator
The SCP51460 is a low cost, low power, high accuracy LDO
voltage regulator. This device will supply output current up to 20 mA
at fixed output voltage 3.3 V with excellent regulation characteristics,
making it ideal for precision regulator applications. It is designed to be
stable without output capacitor. This is an important feature, when fast
rise times and PCB space are in concern. The protective features
include Short Circuit Current and Reverse Voltage Protection. The
SCP51460 is packaged in 3 leads surface mount SOT−23 package.
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Features
•
•
•
•
•
•
•
•
•
SOT−23−3
SN1 SUFFIX
CASE 318
Fixed Output Voltage 3.3 V
VOUT Accuracy 1% over 0 to +100°C
Wide Input Voltage Range up to 28 V
Low Quiescent Current
Low Noise
Reverse Battery Protection
Stable Without Output Capacitor
Available in 3 leads SOT−23 Package
Pb−Free Package is Available
MARKING DIAGRAM
AND PIN ASSIGNMENT
GND
3
D46MG
G
1
Typical Applications
•
•
•
•
VIN
Handheld Instruments
Precision Regulators
Data Acquisition Systems
High Accuracy Micropower Supplies
(Top View)
D46
= Specific Device Code
M
= Date Code
G
= Pb−Free Package
(Note: Microdot may be in either location)
VIN = 4.2 to 28 V
VOUT
VIN
CIN
0.1 mF
2
VOUT
VOUT
SCP51460
(3.3 V fixed)
3.3 V
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 5 of this data sheet.
GND
Figure 1. Typical Application Schematics
© Semiconductor Components Industries, LLC, 2010
February, 2010 − Rev. 0
1
Publication Order Number:
SCP51460/D
SCP51460
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Table 1. PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
Description
1
VIN
2
VOUT
Regulated Output Voltage
3
GND
Power Supply Ground; Device Substrate
Positive Input Voltage
Table 2. ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
VIN
30
V
Reverse Input Voltage
VIN
−15
V
Output Short Circuit Duration (Note 2)
IOUT
∞
sec
TJ(max)
150
°C
TSTG
−65 to 150
°C
ESD Capability, Human Body Model (Note 3)
ESDHBM
1000
V
ESD Capability, Machine Model (Note 3)
ESDMM
100
V
Input Voltage (Note 1)
Maximum Junction Temperature
Storage Temperature
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Refer to ELECTRICAL CHARACTERISTIS and APPLICATION INFORMATION for Safe Operating Area.
2. With the Input Voltage ≤ 28 V the SCP51460 is able to withstand an infinitely long time under Short Circuit Condition.
3. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per AEC−Q100−002 (EIA/JESD22−A114)
ESD Machine Model tested per AEC−Q100−003 (EIA/JESD22−A115)
Latch up Current Maximum Rating: tested per JEDEC standard: JESD78.
Table 3. THERMAL CHARACTERISTICS
Rating
Symbol
Value
Unit
RqJA
246
°C/W
Thermal Characteristics, SOT23−3 package
Thermal Resistance, Junction−to−Ambient (Note 4)
4. Soldered on 1 oz 50 mm2 FR4 copper area.
Table 4. OPERATING RANGES
Symbol
Min
Max
Unit
Operating Input Voltage (Note 5)
Rating
VIN
VOUT + 0.9
28
V
Operating Ambient Temperature Range
TA
0
100
°C
5. Refer to ELECTRICAL CHARACTERISTIS and APPLICATION INFORMATION for Safe Operating Area.
Table 5. ELECTRICAL CHARACTERISTICS (VIN = VOUT + 2.5 V, IOUT = 0, CIN = 0.1 mF, COUT = 0 mF; For typical values TA =
25°C, for min/max values 0°C ≤ TA ≤ 100°C unless otherwise noted.) (Note 6).
Parameter
Test Conditions
Output Voltage
Symbol
Min
Typ
Max
Unit
VOUT
3.267
(−1 %)
3.3
3.333
(+1 %)
V
Line Regulation
VIN = VOUT + 0.9 V to 2.5 V
VIN = VOUT + 2.5 V to 20 V
RegLINE
−
−
120
75
1000
130
ppm/V
Load Regulation
IOUT = 100 mA, TA = 25°C
IOUT = 10 mA, TA = 25°C
IOUT = 20 mA, TA = 25°C
RegLOAD
−
−
−
1200
210
180
3000
300
300
ppm/mA
Load Regulation
IOUT = 100 mA, 0°C ≤ TA ≤ 100°C
IOUT = 10 mA, 0°C ≤ TA ≤ 100°C
RegLOAD
−
−
1500
260
4000
300
ppm/mA
Dropout Voltage
Measured at VOUT − 2%
IOUT = 0 mA
IOUT = 10 mA
−
−
0.65
0.94
0.9
1.4
VDO
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2
V
SCP51460
Quiescent Current
IOUT = 0 mA, TA = 25°C
IOUT = 0 mA, 0°C ≤ TA ≤ 100°C
IQ
−
−
150
180
220
mA
Output Short Circuit Current
VOUT = 0 V, TA = 25°C
ISC
−
40
−
mA
Reverse Leakage
VIN = − 15 V, TA = 25°C
ILEAK
−
0.1
10
mA
Output Noise Voltage (Note 7)
f = 0.1 Hz to 10 Hz
f = 10 Hz to 1 kHz
VN
−
13.2
13.2
−
mVPP
mVrms
6. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at TJ = TA = 25°C. Low
duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
7. Peak−to−peak noise is measured with a single pole high pass filter at 0.1 Hz and 2−pole low pass filter at 10 Hz. The unit is enclosed into
still−air environment to eliminate thermocouple effects. The test time is set to 10 sec.
TYPICAL CHARACTERISTICS
3.33
450
3 TYPICAL PARTS
QUIESCENT CURRENT (mA)
OUTPUT VOLTAGE (V)
3.32
3.31
3.30
3.29
3.28
3.27
−40 −20
0
20
40
60
80
100
120
140
400
350
300
250
200
25°C
150
100°C
100
−40°C
50
0
0
2.5
5.0
7.5
10
12.5
15
17.5
TEMPERATURE (°C)
INPUT VOLTAGE (V)
Figure 2. Output Voltage vs. Temperature
Figure 3. Quiescent Current vs. Input Voltage
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3
20
SCP51460
TYPICAL CHARACTERISTICS
20
OUTPUT VOLTAGE CHANGE (mV)
25°C
15
10
100°C
−40°C
5
0
0
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
OUTPUT VOLTAGE (V)
IOUT = 0...100 mA
−20
0
20
40
60
80
Figure 4. Dropout Voltage vs. Output Current
Figure 5. Output Voltage Change vs.
Temperature
100°C
3.32
25°C
0°C
3.31
−40°C
3.30
4
6
8
10
12
14
16
18
20
100
90
80
70
60
50
40
30
20
10
0
10
100
1k
10 k
INPUT VOLTAGE (V)
FREQUENCY (Hz)
Figure 6. Output Voltage vs. Input Voltage
Figure 7. PSRR vs. Frequency
100 k
70
SHORT CIRCUIT CURRENT (mA)
10
OUTPUT NOISE (mVrms/rthz)
IOUT = 0...10 mA
5
TEMPERATURE (°C)
3.33
1
0.1
IOUT = 0...20 mA
10
MINIMUM INPUT−TO−OUTPUT VOLTAGE (V)
3.34
3.29
15
0
−40
POWER SUPPLY REJECTION RATIO (dB)
OUTPUT CURRENT (mA)
20
0.1
1
10
100
65
60
55
50
45
40
35
30
−40 −20
1000
0
20
40
60
80
100
FREQUENCY (Hz)
TEMPERATURE (°C)
Figure 8. Output Voltage Noise
0.1 Hz − 1 kHz
Figure 9. Short Circuit Current vs.
Temperature
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4
120 140
SCP51460
APPLICATIONS INFORMATION
Input Decoupling Capacitor (CIN)
Thermal Characteristics
A ceramic or tantalum 0.1 mF capacitor is recommended
and should be connected close to the SCP51460 package.
Higher capacitance and lower ESR will improve the overall
line transient response.
As power dissipation in the SCP51460 increases, it may
become necessary to provide some thermal relief. The
maximum power dissipation supported by the device is
dependent upon board design and layout. The board material
and the ambient temperature affect the rate of junction
temperature rise for the part. The maximum power
dissipation the SCP51460 can handle is given by:
Output Decoupling Capacitor (COUT)
The SCP51460 does not require any output capacitance to
be stable. With no capacitor at the output the device will have
faster VOUT rise time and will occupy less PCB space. In
some applications however the output capacitor could be
added. This will improve the overall transient response.
During the transients capacitors with low ESR (e.g. Ceramic
capacitors) will cause more ringing than the Tantalum or
Aluminum Capacitors.
VIN = 4.2 to 28 V
VOUT
VIN
SCP51460
(3.3 V fixed)
GND
CIN
0.1 mF
P D(MAX) +
[T J(MAX) * TA]
R qJA
(eq. 1)
Since TJ is not recommended to exceed 100°C (TJ(MAX)),
then the SCP51460 can dissipate up to 305 mW when the
ambient temperature (TA) is 25°C.
The power dissipated by the SCP51460 can be calculated
from the following equations:
VOUT
P D [ V in(IGND@Iout) ) I out(V in * V out)
3.3 V
(eq. 2)
or
COUT
V in(MAX) [
Table 6 shows the maximum capacitance of COUT for
various load currents to avoid instability.
IOUT =
1 mA
IOUT =
10 mA
IOUT =
20 mA
>10 mF
>10 mF
1 mF
0.68 mF
I out ) I GND
(eq. 3)
Hints
Vin and GND printed circuit board traces should be as
wide as possible. When the impedance of these traces is
high, there is a chance to pick up noise or cause the regulator
to malfunction. Place external components, especially the
output capacitor, as close as possible to the SCP51460, and
make traces as short as possible.
Table 6.
IOUT =
100 mA
P D(MAX) ) (V out @ I out)
ORDERING INFORMATION
Device
SCP51460SN33T1G
Device Code
Package
Shipping†
D46
SOT23−3
(Pb−Free)
3,000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specification Brochure, BRD8011/D.
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5
SCP51460
PACKAGE DIMENSIONS
SOT−23 (TO−236)
CASE 318−08
ISSUE AN
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. MAXIMUM LEAD THICKNESS INCLUDES LEAD
FINISH THICKNESS. MINIMUM LEAD
THICKNESS IS THE MINIMUM THICKNESS OF
BASE MATERIAL.
4. 318−01 THRU −07 AND −09 OBSOLETE, NEW
STANDARD 318−08.
D
SEE VIEW C
3
HE
E
c
1
DIM
A
A1
b
c
D
E
e
L
L1
HE
2
e
b
0.25
q
A
L
A1
MIN
0.89
0.01
0.37
0.09
2.80
1.20
1.78
0.10
0.35
2.10
MILLIMETERS
NOM
MAX
1.00
1.11
0.06
0.10
0.44
0.50
0.13
0.18
2.90
3.04
1.30
1.40
1.90
2.04
0.20
0.30
0.54
0.69
2.40
2.64
MIN
0.035
0.001
0.015
0.003
0.110
0.047
0.070
0.004
0.014
0.083
INCHES
NOM
0.040
0.002
0.018
0.005
0.114
0.051
0.075
0.008
0.021
0.094
MAX
0.044
0.004
0.020
0.007
0.120
0.055
0.081
0.012
0.029
0.104
L1
VIEW C
SOLDERING FOOTPRINT
0.95
0.037
0.95
0.037
2.0
0.079
0.9
0.035
SCALE 10:1
0.8
0.031
mm Ǔ
ǒinches
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are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
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SCP51460/D